Short, example-driven Rust tutorials written for the moments you get stuck: ownership, borrowing, lifetimes, and every compiler error explained with code that actually compiles.https://hackingwithrust.com/enhttps://hackingwithrust.com/compiler-errors/e0603-module-is-private/https://hackingwithrust.com/compiler-errors/e0603-module-is-private/Fix Rust error E0603: where pub belongs, and where a re-export fits.Mon, 02 Nov 2026 06:26:17 GMThttps://hackingwithrust.com/compiler-errors/e0599-no-method-named-found-for-type/https://hackingwithrust.com/compiler-errors/e0599-no-method-named-found-for-type/Fix Rust error E0599: import the trait, or fix the receiver type.Mon, 02 Nov 2026 04:10:54 GMThttps://hackingwithrust.com/databases/how-to-insert-a-row-and-get-the-id/https://hackingwithrust.com/databases/how-to-insert-a-row-and-get-the-id/Insert with sqlx and get the new row's id back using Postgres RETURNING.Mon, 02 Nov 2026 04:05:51 GMThttps://hackingwithrust.com/compiler-errors/e0282-type-annotations-needed/https://hackingwithrust.com/compiler-errors/e0282-type-annotations-needed/Fix Rust error E0282 by giving the compiler one concrete type.Mon, 02 Nov 2026 01:59:56 GMThttps://hackingwithrust.com/compiler-errors/e0106-missing-lifetime-specifier/https://hackingwithrust.com/compiler-errors/e0106-missing-lifetime-specifier/Fix Rust error E0106 by adding the lifetime the compiler cannot infer.Sun, 01 Nov 2026 23:37:44 GMThttps://hackingwithrust.com/compiler-errors/e0277-trait-bound-not-satisfied/https://hackingwithrust.com/compiler-errors/e0277-trait-bound-not-satisfied/Fix Rust error E0277 by reading the trait bound and type the compiler named.Sun, 01 Nov 2026 21:28:50 GMThttps://hackingwithrust.com/compiler-errors/e0308-mismatched-types/https://hackingwithrust.com/compiler-errors/e0308-mismatched-types/Fix Rust error E0308 by reading the file, line and column the compiler named.Sun, 01 Nov 2026 19:17:06 GMThttps://hackingwithrust.com/compiler-errors/e0433-failed-to-resolve-use-of-undeclared-crate-or-module/https://hackingwithrust.com/compiler-errors/e0433-failed-to-resolve-use-of-undeclared-crate-or-module/Fix Rust error E0433 by checking the path, the module tree, and Cargo.toml.Sun, 01 Nov 2026 17:06:38 GMThttps://hackingwithrust.com/compiler-errors/e0432-unresolved-import/https://hackingwithrust.com/compiler-errors/e0432-unresolved-import/Fix Rust error E0432 by checking the path, the crate, and the visibility.Sun, 01 Nov 2026 14:54:00 GMThttps://hackingwithrust.com/compiler-errors/e0425-cannot-find-value-in-this-scope/https://hackingwithrust.com/compiler-errors/e0425-cannot-find-value-in-this-scope/Fix Rust error E0425 by checking the spelling, the scope, and the imports.Sun, 01 Nov 2026 12:34:53 GMThttps://hackingwithrust.com/compiler-errors/e0716-temporary-value-dropped-while-borrowed/https://hackingwithrust.com/compiler-errors/e0716-temporary-value-dropped-while-borrowed/Fix Rust error E0716: bind the borrowed temporary to a variable first.Sun, 01 Nov 2026 10:12:48 GMThttps://hackingwithrust.com/compiler-errors/e0597-borrowed-value-does-not-live-long-enough/https://hackingwithrust.com/compiler-errors/e0597-borrowed-value-does-not-live-long-enough/Fix Rust error E0597: make the borrowed value outlive the borrow that uses it.Sun, 01 Nov 2026 08:06:20 GMThttps://hackingwithrust.com/compiler-errors/e0596-cannot-borrow-as-mutable-as-it-is-not-declared-as-mutable/https://hackingwithrust.com/compiler-errors/e0596-cannot-borrow-as-mutable-as-it-is-not-declared-as-mutable/Fix Rust error E0596: declare the binding mut before taking a mutable borrow.Sun, 01 Nov 2026 05:59:16 GMThttps://hackingwithrust.com/compiler-errors/e0507-cannot-move-out-of-borrowed-content/https://hackingwithrust.com/compiler-errors/e0507-cannot-move-out-of-borrowed-content/Fix Rust error E0507: clone, take, or borrow deeper instead of moving.Sun, 01 Nov 2026 03:51:44 GMThttps://hackingwithrust.com/compiler-errors/e0505-cannot-move-out-of-value-because-it-is-borrowed/https://hackingwithrust.com/compiler-errors/e0505-cannot-move-out-of-value-because-it-is-borrowed/Fix Rust error E0505: let the borrow finish before the move happens.Sun, 01 Nov 2026 01:44:23 GMThttps://hackingwithrust.com/compiler-errors/e0502-cannot-borrow-as-mutable-because-it-is-also-borrowed-as-immutable/https://hackingwithrust.com/compiler-errors/e0502-cannot-borrow-as-mutable-because-it-is-also-borrowed-as-immutable/Fix Rust error E0502: end the shared borrow before taking the mutable one.Sat, 31 Oct 2026 23:24:43 GMThttps://hackingwithrust.com/compiler-errors/e0499-cannot-borrow-as-mutable-more-than-once/https://hackingwithrust.com/compiler-errors/e0499-cannot-borrow-as-mutable-more-than-once/Fix Rust error E0499 by finishing one mutable borrow before starting the next — or by splitting the borrow across disjoint fields.Sat, 31 Oct 2026 21:17:01 GMThttps://hackingwithrust.com/compiler-errors/e0384-cannot-assign-twice-to-immutable-variable/https://hackingwithrust.com/compiler-errors/e0384-cannot-assign-twice-to-immutable-variable/Fix Rust error E0384 by adding mut where the variable is declared — and why the first let already counts as the first assignment.Sat, 31 Oct 2026 19:10:28 GMThttps://hackingwithrust.com/compiler-errors/how-to-read-a-rust-compiler-error-message/https://hackingwithrust.com/compiler-errors/how-to-read-a-rust-compiler-error-message/A Rust compiler error has four parts — the headline, the location, the annotated snippet and the help block. Read them in that order and the fix is usually in the last one.Sat, 31 Oct 2026 17:04:51 GMThttps://hackingwithrust.com/borrowing/how-to-change-what-a-mutable-reference-points-at/https://hackingwithrust.com/borrowing/how-to-change-what-a-mutable-reference-points-at/*r = value writes through a Rust &mut — and the reference binding needs no mut.Sat, 31 Oct 2026 14:58:35 GMThttps://hackingwithrust.com/borrowing/what-is-a-slice-and-why-it-is-a-borrow/https://hackingwithrust.com/borrowing/what-is-a-slice-and-why-it-is-a-borrow/A Rust slice (&[T], &str) is a borrowed view into a Vec, array or string.Sat, 31 Oct 2026 12:51:55 GMThttps://hackingwithrust.com/borrowing/how-to-end-a-borrow-early/https://hackingwithrust.com/borrowing/how-to-end-a-borrow-early/End a Rust borrow early: an inner scope, drop, or take the value instead.Sat, 31 Oct 2026 10:45:38 GMThttps://hackingwithrust.com/borrowing/how-to-take-a-reference-instead-of-cloning/https://hackingwithrust.com/borrowing/how-to-take-a-reference-instead-of-cloning/When to borrow instead of clone in Rust: the function signature decides.Sat, 31 Oct 2026 08:40:07 GMThttps://hackingwithrust.com/borrowing/how-to-borrow-one-field-of-a-struct/https://hackingwithrust.com/borrowing/how-to-borrow-one-field-of-a-struct/Borrow one field of a struct in Rust while another field is borrowed too.Sat, 31 Oct 2026 06:35:03 GMThttps://hackingwithrust.com/databases/how-to-run-tests-against-a-real-database/https://hackingwithrust.com/databases/how-to-run-tests-against-a-real-database/Every test gets its own Postgres database: sqlx::test creates, migrates, drops.Sat, 31 Oct 2026 04:22:29 GMThttps://hackingwithrust.com/databases/how-to-avoid-sql-injection/https://hackingwithrust.com/databases/how-to-avoid-sql-injection/Bind user input with sqlx instead of format!-ing it into the SQL string.Sat, 31 Oct 2026 02:15:15 GMThttps://hackingwithrust.com/databases/how-to-map-database-rows-to-structs/https://hackingwithrust.com/databases/how-to-map-database-rows-to-structs/Map Postgres rows into Rust structs with sqlx's FromRow and query_as.Fri, 30 Oct 2026 23:51:04 GMThttps://hackingwithrust.com/databases/how-to-use-sqlite-in-a-rust-program/https://hackingwithrust.com/databases/how-to-use-sqlite-in-a-rust-program/Store data with rusqlite: SQLite in one file, compiled in, no server to run.Fri, 30 Oct 2026 21:45:37 GMThttps://hackingwithrust.com/databases/how-to-use-transactions/https://hackingwithrust.com/databases/how-to-use-transactions/Group two inserts with sqlx begin and commit, and let the error path roll back.Fri, 30 Oct 2026 19:40:57 GMThttps://hackingwithrust.com/projects/rust-vs-go/a-decision-table-for-your-next-backend/https://hackingwithrust.com/projects/rust-vs-go/a-decision-table-for-your-next-backend/A weighted decision table for choosing Rust or Go for your next backend service.Fri, 30 Oct 2026 16:39:18 GMThttps://hackingwithrust.com/databases/how-to-get-compile-time-checked-queries/https://hackingwithrust.com/databases/how-to-get-compile-time-checked-queries/Check a sqlx query! against Postgres at compile time, not at run time.Fri, 30 Oct 2026 15:21:46 GMThttps://hackingwithrust.com/projects/rust-vs-go/hiring-and-team-adoption/https://hackingwithrust.com/projects/rust-vs-go/hiring-and-team-adoption/Who is available to hire in each language, what the job market actually shows, and what the first month of onboarding costs — survey numbers plus one count run on this machine.Fri, 30 Oct 2026 14:33:24 GMThttps://hackingwithrust.com/databases/how-to-use-sqlx-migrations/https://hackingwithrust.com/databases/how-to-use-sqlx-migrations/Create and run SQLx migrations from the command line, in plain SQL files.Fri, 30 Oct 2026 13:06:51 GMThttps://hackingwithrust.com/projects/rust-vs-go/deployment-and-binary-size/https://hackingwithrust.com/projects/rust-vs-go/deployment-and-binary-size/Static binaries, cross-compilation, and container images: the same ten-line program shipped from both toolchains, with every size taken from a real build.Fri, 30 Oct 2026 12:25:04 GMThttps://hackingwithrust.com/databases/how-to-connect-to-postgres-with-sqlx/https://hackingwithrust.com/databases/how-to-connect-to-postgres-with-sqlx/Connect Rust to Postgres with sqlx and fix the DATABASE_URL errors you will hit.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/databases/how-to-run-a-query-and-read-rows/https://hackingwithrust.com/databases/how-to-run-a-query-and-read-rows/Run a Postgres query with sqlx, read the rows back, and map them into a struct.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/logging/how-to-add-logging-with-the-tracing-crate/https://hackingwithrust.com/logging/how-to-add-logging-with-the-tracing-crate/Add logging to a Rust program with tracing: levels, spans, and fields.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/logging/how-to-create-a-global-with-lazy-initialisation/https://hackingwithrust.com/logging/how-to-create-a-global-with-lazy-initialisation/Create a Rust global initialised on first use with OnceLock or LazyLock.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/logging/how-to-keep-secrets-out-of-your-logs/https://hackingwithrust.com/logging/how-to-keep-secrets-out-of-your-logs/Redact tokens and passwords in Rust before a debug print leaks them to logs.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/logging/how-to-log-structured-fields/https://hackingwithrust.com/logging/how-to-log-structured-fields/Add searchable key=value fields to Rust logs with tracing, and switch to JSON.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/logging/how-to-merge-config-from-file-env-and-flags/https://hackingwithrust.com/logging/how-to-merge-config-from-file-env-and-flags/Merge file, env and CLI config in Rust with one precedence order.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/logging/how-to-set-the-log-level-at-runtime/https://hackingwithrust.com/logging/how-to-set-the-log-level-at-runtime/Set Rust log levels at runtime with RUST_LOG and tracing's EnvFilter.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/logging/how-to-write-a-config-file-from-a-struct/https://hackingwithrust.com/logging/how-to-write-a-config-file-from-a-struct/Write a config file from a Rust struct with std, in a diff-friendly order.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/processes/how-to-handle-ctrl-c-gracefully/https://hackingwithrust.com/processes/how-to-handle-ctrl-c-gracefully/Handle Ctrl+C in Rust with the ctrlc crate and run cleanup before exiting.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/processes/how-to-run-a-task-on-a-timer/https://hackingwithrust.com/processes/how-to-run-a-task-on-a-timer/Run a task on a fixed interval in Rust without the drift that sleep causes.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/llm-apps/a-vector-store-in-sqlite/https://hackingwithrust.com/projects/llm-apps/a-vector-store-in-sqlite/Store embedding vectors in SQLite and search them: brute force, then an index.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/llm-apps/an-http-api-for-questions/https://hackingwithrust.com/projects/llm-apps/an-http-api-for-questions/Stream answers from a local RAG service: axum, POST /ask, Server-Sent Events.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/llm-apps/chunking-documents-for-retrieval/https://hackingwithrust.com/projects/llm-apps/chunking-documents-for-retrieval/Chunk documents before embedding: size, overlap, and what each choice costs.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/llm-apps/embeddings-and-vector-similarity/https://hackingwithrust.com/projects/llm-apps/embeddings-and-vector-similarity/Turn sentences into 384-number vectors and rank them by cosine similarity.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/llm-apps/evaluating-retrieval-quality/https://hackingwithrust.com/projects/llm-apps/evaluating-retrieval-quality/Measure a RAG pipeline with a labelled set: recall@k, MRR, and honest numbers.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/llm-apps/retrieving-and-prompting/https://hackingwithrust.com/projects/llm-apps/retrieving-and-prompting/Turn ranked vectors into a context window: dedupe, token budget, the prompt.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/llm-apps/running-a-model-locally/https://hackingwithrust.com/projects/llm-apps/running-a-model-locally/Run a language model on your own CPU: weights, memory, and first tokens.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/rust-vs-go/concurrency-models-compared/https://hackingwithrust.com/projects/rust-vs-go/concurrency-models-compared/goroutines and channels versus threads and async: 10,000 concurrent tasks, measured in both languages.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/rust-vs-go/error-handling-in-both-languages/https://hackingwithrust.com/projects/rust-vs-go/error-handling-in-both-languages/if err != nil versus Result and ?: the same error paths written twice and run.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/projects/rust-vs-go/performance-in-real-workloads/https://hackingwithrust.com/projects/rust-vs-go/performance-in-real-workloads/Rust vs Go on a real JSON workload: throughput, latency, and memory per request.Fri, 30 Oct 2026 12:03:26 GMThttps://hackingwithrust.com/dates/how-to-convert-between-timestamps-and-dates/https://hackingwithrust.com/dates/how-to-convert-between-timestamps-and-dates/Convert Unix timestamps and SystemTime in Rust, in seconds or milliseconds.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/dates/how-to-get-the-current-time-in-rust/https://hackingwithrust.com/dates/how-to-get-the-current-time-in-rust/Get the current time in Rust with SystemTime, and when you need Instant instead.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/dates/how-to-measure-how-long-something-took/https://hackingwithrust.com/dates/how-to-measure-how-long-something-took/Time your Rust code with Instant, and why SystemTime is the wrong clock for it.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/dates/how-to-parse-and-format-dates-with-chrono/https://hackingwithrust.com/dates/how-to-parse-and-format-dates-with-chrono/Format and parse dates in Rust with chrono, without losing the timezone.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/dates/how-to-work-with-timezones-in-rust/https://hackingwithrust.com/dates/how-to-work-with-timezones-in-rust/Why Rust's std is UTC-only, why TZ changes nothing, and how DST breaks day math.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/processes/how-to-check-whether-a-command-exists/https://hackingwithrust.com/processes/how-to-check-whether-a-command-exists/Check if a command exists on PATH, and the Rust spawn error when it doesn't.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/processes/how-to-pipe-data-between-processes/https://hackingwithrust.com/processes/how-to-pipe-data-between-processes/Pipe data between child processes in Rust with Stdio::piped without deadlocking.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/processes/how-to-run-a-command-with-a-timeout/https://hackingwithrust.com/processes/how-to-run-a-command-with-a-timeout/Time out a command in Rust with try_wait, then kill and reap the child properly.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/processes/how-to-run-an-external-command-and-read-its-output/https://hackingwithrust.com/processes/how-to-run-an-external-command-and-read-its-output/Run an external command in Rust and capture its stdout, stderr and exit status.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/processes/how-to-set-an-environment-variable-for-a-child-process/https://hackingwithrust.com/processes/how-to-set-an-environment-variable-for-a-child-process/Set environment variables for a child process in Rust with Command::env.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/processes/how-to-use-environment-variables-in-rust/https://hackingwithrust.com/processes/how-to-use-environment-variables-in-rust/Read environment variables in Rust with env::var and handle missing valuesThu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/a-pratt-parser-for-expressions/https://hackingwithrust.com/projects/interpreter/a-pratt-parser-for-expressions/A Pratt parser in Rust: precedence as a table, not a ladder of functions.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/a-repl-for-the-interpreter/https://hackingwithrust.com/projects/interpreter/a-repl-for-the-interpreter/Turn a tree-walking interpreter's driver into a read-eval-print loop in Rust.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/compiling-instead-of-interpreting/https://hackingwithrust.com/projects/interpreter/compiling-instead-of-interpreting/Why bytecode beats walking the tree: what compiling buys an interpreter.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/control-flow-and-functions/https://hackingwithrust.com/projects/interpreter/control-flow-and-functions/Add if, while, function calls and return to a tree-walking interpreter in Rust.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/error-reporting-with-line-numbers/https://hackingwithrust.com/projects/interpreter/error-reporting-with-line-numbers/Add line and column numbers to runtime errors in a tree-walking interpreter.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/evaluating-expressions/https://hackingwithrust.com/projects/interpreter/evaluating-expressions/Walk the syntax tree and produce values: a tree-walking evaluator for birch.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/representing-a-program-as-a-tree/https://hackingwithrust.com/projects/interpreter/representing-a-program-as-a-tree/Build a syntax tree in Rust: one enum per node, Box where the grammar recurses.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/scanning-source-into-tokens/https://hackingwithrust.com/projects/interpreter/scanning-source-into-tokens/birch's first running code: a scanner that turns source text into tokens, each carrying a line and a column.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/variables-and-scopes/https://hackingwithrust.com/projects/interpreter/variables-and-scopes/An environment chain: variables, assignment and block scopes for birch.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/interpreter/what-were-building-a-small-scripting-language/https://hackingwithrust.com/projects/interpreter/what-were-building-a-small-scripting-language/The grammar of a small scripting language, chosen for a Rust interpreter track.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/projects/llm-apps/what-were-building-a-local-rag-service/https://hackingwithrust.com/projects/llm-apps/what-were-building-a-local-rag-service/Build a local RAG service in Rust: candle, embeddings, SQLite, SSE.Thu, 29 Oct 2026 11:52:28 GMThttps://hackingwithrust.com/numbers/how-to-compare-floats-without-surprises/https://hackingwithrust.com/numbers/how-to-compare-floats-without-surprises/Compare floats in Rust: pick an epsilon, and handle the NaN that breaks ==.Wed, 28 Oct 2026 11:47:23 GMThttps://hackingwithrust.com/numbers/how-to-do-integer-division-and-get-the-remainder/https://hackingwithrust.com/numbers/how-to-do-integer-division-and-get-the-remainder/How / and % work on Rust integers: truncation, remainder, and the sign rule.Wed, 28 Oct 2026 11:47:23 GMThttps://hackingwithrust.com/numbers/how-to-format-a-number-with-separators/https://hackingwithrust.com/numbers/how-to-format-a-number-with-separators/Format a number with thousands separators in Rust: the spec has no flag for it.Wed, 28 Oct 2026 11:47:23 GMThttps://hackingwithrust.com/numbers/how-to-generate-a-random-number-in-a-range/https://hackingwithrust.com/numbers/how-to-generate-a-random-number-in-a-range/Generate a random number in a range in Rust with rand — and why 1..6 never rolls a 6.Wed, 28 Oct 2026 11:47:23 GMThttps://hackingwithrust.com/numbers/how-to-round-a-float-to-n-decimals/https://hackingwithrust.com/numbers/how-to-round-a-float-to-n-decimals/Round a float to n decimals in Rust: why round() is a float, and when to format.Wed, 28 Oct 2026 11:47:23 GMThttps://hackingwithrust.com/projects/mini-redis/benchmarks-and-what-real-redis-does/https://hackingwithrust.com/projects/mini-redis/benchmarks-and-what-real-redis-does/A load generator for the server: throughput, what dominates it, and the gaps that remainWed, 28 Oct 2026 11:47:23 GMThttps://hackingwithrust.com/projects/mini-redis/testing-a-network-server/https://hackingwithrust.com/projects/mini-redis/testing-a-network-server/A real client in an integration test: TCP against the built binaryWed, 28 Oct 2026 11:47:23 GMThttps://hackingwithrust.com/projects/mini-redis/transactions-with-multi-and-exec/https://hackingwithrust.com/projects/mini-redis/transactions-with-multi-and-exec/MULTI and EXEC in a Rust Redis clone: per-connection queues, EXECABORT abortsWed, 28 Oct 2026 11:47:23 GMThttps://hackingwithrust.com/http/how-to-send-an-email-from-a-rust-program/https://hackingwithrust.com/http/how-to-send-an-email-from-a-rust-program/Send email from Rust with lettre over SMTP, and when an HTTP API is better.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/numbers/difference-between-as-and-from-for-casting/https://hackingwithrust.com/numbers/difference-between-as-and-from-for-casting/Rust casting: as truncates silently, From is lossless, try_from errors.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/numbers/difference-between-f32-and-f64/https://hackingwithrust.com/numbers/difference-between-f32-and-f64/f32 vs f64 in Rust: precision, memory, and why f64 is the default.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/numbers/how-to-choose-between-i32-and-usize/https://hackingwithrust.com/numbers/how-to-choose-between-i32-and-usize/i32 vs usize in Rust: what each means, when usize is required, where it bites.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/numbers/how-to-convert-a-number-to-a-string/https://hackingwithrust.com/numbers/how-to-convert-a-number-to-a-string/Convert a number to a String in Rust: to_string, format!, and the float trap.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/numbers/how-to-convert-a-string-to-a-number/https://hackingwithrust.com/numbers/how-to-convert-a-string-to-a-number/Parse a String to a number in Rust with str::parse, and handle the error it returns.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/numbers/how-to-parse-an-integer-from-user-input/https://hackingwithrust.com/numbers/how-to-parse-an-integer-from-user-input/Read an integer from user input in Rust: trim the newline, parse, retry.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/numbers/how-to-stop-an-integer-from-overflowing/https://hackingwithrust.com/numbers/how-to-stop-an-integer-from-overflowing/Integer overflow: panic in debug, wrap in release, and what to write instead.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/projects/mini-redis/handling-concurrent-connections/https://hackingwithrust.com/projects/mini-redis/handling-concurrent-connections/One Tokio task per client and a shared store: serving many connections at once.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/projects/mini-redis/parsing-and-encoding-resp/https://hackingwithrust.com/projects/mini-redis/parsing-and-encoding-resp/A RESP decoder in Rust that survives a split packet, plus pipelining and ECHO.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/projects/mini-redis/persistence-with-a-snapshot/https://hackingwithrust.com/projects/mini-redis/persistence-with-a-snapshot/Add SAVE to a Redis clone: dump the store to disk and load it back at startup.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/projects/mini-redis/pub-sub-messaging/https://hackingwithrust.com/projects/mini-redis/pub-sub-messaging/SUBSCRIBE and PUBLISH in a Redis clone: channels, mailboxes, and fan-out.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/projects/mini-redis/storing-values-with-expiry/https://hackingwithrust.com/projects/mini-redis/storing-values-with-expiry/EXPIRE and TTL in a Redis clone: key deadlines, lazy expiry, and a sweeper task.Tue, 27 Oct 2026 12:57:54 GMThttps://hackingwithrust.com/http/how-to-check-for-tls-certificate-errors/https://hackingwithrust.com/http/how-to-check-for-tls-certificate-errors/Fix a TLS certificate error in Rust: expired, wrong hostname, or untrusted root.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/http/how-to-download-a-file-over-http/https://hackingwithrust.com/http/how-to-download-a-file-over-http/Download a file with reqwest, streaming the HTTP body to disk instead of into memory.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/http/how-to-handle-a-non-200-status/https://hackingwithrust.com/http/how-to-handle-a-non-200-status/Make reqwest treat a 404 or 500 as an error, and read the error body anyway.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/http/how-to-make-concurrent-requests/https://hackingwithrust.com/http/how-to-make-concurrent-requests/Run concurrent HTTP requests with join_all, and cap how many run at once.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/http/how-to-parse-a-url/https://hackingwithrust.com/http/how-to-parse-a-url/Parse a URL in Rust: the url crate, and the parts it hands you.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/http/how-to-parse-json-from-an-api/https://hackingwithrust.com/http/how-to-parse-json-from-an-api/Parse JSON from an API into a struct with reqwest and serde, including null fields.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/http/how-to-read-a-response-header/https://hackingwithrust.com/http/how-to-read-a-response-header/Read a response header in Rust with reqwest — case-insensitive, and rate limits.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/http/how-to-retry-a-failed-request/https://hackingwithrust.com/http/how-to-retry-a-failed-request/Retry failed requests in reqwest: the built-in policy, and what not to retry.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/projects/mini-redis/speaking-the-resp-protocol/https://hackingwithrust.com/projects/mini-redis/speaking-the-resp-protocol/RESP parsing in Rust by hand: length-prefixed frames, a decoder, a PING server.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/projects/mini-redis/what-were-building-a-redis-clone/https://hackingwithrust.com/projects/mini-redis/what-were-building-a-redis-clone/Build a Redis clone in Rust: RESP protocol, Tokio, key expiry, persistence.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/projects/tui-ratatui/a-sortable-process-list/https://hackingwithrust.com/projects/tui-ratatui/a-sortable-process-list/Sort and filter a live process table in Rust with sysinfo, Ratatui, and nucleo.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/projects/tui-ratatui/charts-and-sparklines/https://hackingwithrust.com/projects/tui-ratatui/charts-and-sparklines/Add a CPU sparkline, help overlay and colour themes to a Ratatui TUI in Rust.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/projects/tui-ratatui/laying-out-panels-and-tables/https://hackingwithrust.com/projects/tui-ratatui/laying-out-panels-and-tables/Ratatui layout constraints, tables and lists, and wheel scrollback in a Rust TUI.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/projects/tui-ratatui/reading-terminal-events/https://hackingwithrust.com/projects/tui-ratatui/reading-terminal-events/Read keys, mouse clicks and resize events in a Rust TUI with crossterm.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/projects/tui-ratatui/refreshing-live-data-without-flicker/https://hackingwithrust.com/projects/tui-ratatui/refreshing-live-data-without-flicker/Tail a log file in Rust with Ratatui: offsets, truncation, ticks, dirty flags.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/projects/tui-ratatui/releasing-a-cross-platform-tui/https://hackingwithrust.com/projects/tui-ratatui/releasing-a-cross-platform-tui/Release a Ratatui TUI: smaller binary, terminal check, cross-platform builds.Sun, 25 Oct 2026 11:43:50 GMThttps://hackingwithrust.com/data-formats/how-to-handle-missing-json-fields/https://hackingwithrust.com/data-formats/how-to-handle-missing-json-fields/Missing JSON field in serde: Option for absent or null, default for a fallback.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/data-formats/how-to-parse-a-query-string/https://hackingwithrust.com/data-formats/how-to-parse-a-query-string/Parse a query string in Rust: percent-decoding, and when a plus means a spaceSat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/data-formats/how-to-parse-a-toml-config-file/https://hackingwithrust.com/data-formats/how-to-parse-a-toml-config-file/Parse a TOML config file in Rust with the toml crate and serde, plus defaultsSat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/data-formats/how-to-read-a-csv-file-into-structs/https://hackingwithrust.com/data-formats/how-to-read-a-csv-file-into-structs/Read a CSV file into Rust structs with serde, and fix headers that don't matchSat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/data-formats/how-to-read-a-json-config-file/https://hackingwithrust.com/data-formats/how-to-read-a-json-config-file/Read a JSON config file in Rust with serde_json, and what a schema change breaksSat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/data-formats/how-to-read-a-yaml-file/https://hackingwithrust.com/data-formats/how-to-read-a-yaml-file/Read a YAML file into Rust structs with serde_yaml, and the two YAML trapsSat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/data-formats/how-to-rename-json-fields-with-serde/https://hackingwithrust.com/data-formats/how-to-rename-json-fields-with-serde/Rename JSON keys with serde: rename for one field, rename_all for camelCase.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/data-formats/how-to-use-serde-with-enums/https://hackingwithrust.com/data-formats/how-to-use-serde-with-enums/serde enum tag types: external, internal, adjacent, untagged — and which to pickSat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/data-formats/how-to-write-a-csv-file-from-structs/https://hackingwithrust.com/data-formats/how-to-write-a-csv-file-from-structs/Write a CSV file from Rust structs, and learn quoting rules that surprise youSat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/http/how-to-make-a-get-request/https://hackingwithrust.com/http/how-to-make-a-get-request/Send an HTTP GET request in Rust with reqwest and tokio, and read the body.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/http/how-to-send-a-post-request-with-json/https://hackingwithrust.com/http/how-to-send-a-post-request-with-json/POST JSON to an API from Rust with reqwest and serde, and read the status code.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/http/how-to-set-a-timeout-on-a-request/https://hackingwithrust.com/http/how-to-set-a-timeout-on-a-request/Set a timeout on a Rust reqwest request — the default is no timeout at all.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/search-engine/an-http-query-api/https://hackingwithrust.com/projects/search-engine/an-http-query-api/Serve haystack search results as JSON over HTTP with axum in Rust.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/search-engine/benchmarking-against-a-real-corpus/https://hackingwithrust.com/projects/search-engine/benchmarking-against-a-real-corpus/Benchmark a Rust search engine: latency, recall, and honest comparison.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/search-engine/fuzzy-matching-and-typo-tolerance/https://hackingwithrust.com/projects/search-engine/fuzzy-matching-and-typo-tolerance/Fuzzy search and typo tolerance in Rust: edit distance over the term dictionary.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/search-engine/incremental-indexing/https://hackingwithrust.com/projects/search-engine/incremental-indexing/Incrementally add documents to a saved Rust index without rebuilding it.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/search-engine/persisting-the-index-to-disk/https://hackingwithrust.com/projects/search-engine/persisting-the-index-to-disk/Persisting a Rust inverted index to disk: a binary format you can load back.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/search-engine/phrase-and-boolean-queries/https://hackingwithrust.com/projects/search-engine/phrase-and-boolean-queries/Phrase and boolean queries in Rust: positions in postings, AND, OR and NOT.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/search-engine/ranking-with-bm25/https://hackingwithrust.com/projects/search-engine/ranking-with-bm25/Ranking with BM25 in Rust: what k1 and b do, and the scores they produce.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/search-engine/what-lucene-does-that-we-didnt/https://hackingwithrust.com/projects/search-engine/what-lucene-does-that-we-didnt/What Lucene does that a hand-built search engine doesn't: segments, compression.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/search-engine/what-tf-idf-actually-measures/https://hackingwithrust.com/projects/search-engine/what-tf-idf-actually-measures/TF-IDF in Rust: what it measures, and the document length bias it hides.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/turning-the-panel-into-the-window/https://hackingwithrust.com/projects/tauri-desktop-app/turning-the-panel-into-the-window/Arrange rustnote into three panes and render the Markdown preview from Rust.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/tui-ratatui/drawing-your-first-frame-with-ratatui/https://hackingwithrust.com/projects/tui-ratatui/drawing-your-first-frame-with-ratatui/Draw a first Ratatui frame: raw mode, alternate screen, render loop.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/projects/tui-ratatui/what-were-building-a-process-monitor/https://hackingwithrust.com/projects/tui-ratatui/what-were-building-a-process-monitor/What we're building: a process monitor TUI in Rust with Ratatui, step by step.Sat, 24 Oct 2026 11:48:38 GMThttps://hackingwithrust.com/cli/how-to-add-a-progress-bar-to-a-cli/https://hackingwithrust.com/cli/how-to-add-a-progress-bar-to-a-cli/Progress bars for a Rust CLI with indicatif: drawn on stderr, hidden in a pipe.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-add-subcommands-with-clap/https://hackingwithrust.com/cli/how-to-add-subcommands-with-clap/Add subcommands to a Rust CLI with clap: a Subcommand enum, plus shared options.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-build-a-static-release-binary/https://hackingwithrust.com/cli/how-to-build-a-static-release-binary/Build a Rust binary to hand over: cargo build --release, strip, and static musl.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-colour-terminal-output/https://hackingwithrust.com/cli/how-to-colour-terminal-output/Print coloured terminal output in Rust with ANSI escape codes and NO_COLOR.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-cross-compile-a-release-binary/https://hackingwithrust.com/cli/how-to-cross-compile-a-release-binary/Cross-compile Rust for Linux or another Mac: targets, linkers, and what breaks.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-detect-whether-output-is-a-terminal/https://hackingwithrust.com/cli/how-to-detect-whether-output-is-a-terminal/Detect a terminal in Rust with is_terminal: why colours vanish in a pipe.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-exit-a-program-with-a-status-code/https://hackingwithrust.com/cli/how-to-exit-a-program-with-a-status-code/Set a Rust program's exit code with process::exit or ExitCode, and what it skipsFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-parse-arguments-with-clap/https://hackingwithrust.com/cli/how-to-parse-arguments-with-clap/Parse command-line arguments in Rust with clap's derive API: a struct, then Cli::parse().Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-print-a-help-message/https://hackingwithrust.com/cli/how-to-print-a-help-message/Shape clap's --help output with doc comments, defaults, and required arguments.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-read-a-config-file-for-a-cli/https://hackingwithrust.com/cli/how-to-read-a-config-file-for-a-cli/Config files in Rust with serde and toml: defaults, $HOME, and a missing file.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-read-a-line-from-standard-input/https://hackingwithrust.com/cli/how-to-read-a-line-from-standard-input/stdin read_line leaves the newline in the string; trim() removes it.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-read-command-line-arguments/https://hackingwithrust.com/cli/how-to-read-command-line-arguments/Read command-line arguments in Rust with std::env::args, skipping the first one.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-read-multiple-values-from-one-line-of-input/https://hackingwithrust.com/cli/how-to-read-multiple-values-from-one-line-of-input/Read several values from one line of stdin: split_whitespace, parse, collect.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-read-standard-input-until-eof/https://hackingwithrust.com/cli/how-to-read-standard-input-until-eof/Read standard input until EOF in Rust: the lines() loop behind a Unix pipeFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/cli/how-to-test-a-cli-end-to-end/https://hackingwithrust.com/cli/how-to-test-a-cli-end-to-end/Test a Rust CLI end to end with assert_cmd and a wiremock fake server.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/data-formats/how-to-deserialize-json-into-a-struct/https://hackingwithrust.com/data-formats/how-to-deserialize-json-into-a-struct/Deserialize JSON into a Rust struct with serde, renaming fields that differ.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/data-formats/how-to-serialize-a-struct-to-json/https://hackingwithrust.com/data-formats/how-to-serialize-a-struct-to-json/Serialize a Rust struct to JSON: to_string, to_string_pretty, skipping None.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-create-a-directory-and-its-parents/https://hackingwithrust.com/files/how-to-create-a-directory-and-its-parents/Use fs::create_dir_all in Rust to create a directory and every missing parentFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-find-the-path-of-the-current-executable/https://hackingwithrust.com/files/how-to-find-the-path-of-the-current-executable/Use std::env::current_exe in Rust to find the path of your own binaryFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-get-the-current-working-directory/https://hackingwithrust.com/files/how-to-get-the-current-working-directory/Use std::env::current_dir in Rust to get the current working directoryFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-join-paths-without-breaking-on-windows/https://hackingwithrust.com/files/how-to-join-paths-without-breaking-on-windows/Use PathBuf::join and push in Rust to build paths that work on Windows and UnixFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-list-the-files-in-a-directory/https://hackingwithrust.com/files/how-to-list-the-files-in-a-directory/List directory contents in Rust with fs::read_dir, and handle entries that errorFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-read-and-write-a-tar-gz-archive/https://hackingwithrust.com/files/how-to-read-and-write-a-tar-gz-archive/Create and read tar.gz archives in Rust with flate2 and tar, streamingFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-read-file-metadata/https://hackingwithrust.com/files/how-to-read-file-metadata/Read file size, modified time and permissions in Rust with fs::metadataFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-resize-an-image/https://hackingwithrust.com/files/how-to-resize-an-image/Resize an image in Rust with the image crate, and pick the right filter.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-walk-a-directory-tree/https://hackingwithrust.com/files/how-to-walk-a-directory-tree/Recursively walk a directory tree in Rust with fs::read_dir, symlinks includedFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-watch-files-for-changes/https://hackingwithrust.com/files/how-to-watch-files-for-changes/Watch files for changes in Rust with notify, and survive saves that fire twiceFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-work-with-temporary-files/https://hackingwithrust.com/files/how-to-work-with-temporary-files/Create and clean up temporary files in Rust with std::env::temp_dirFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/async-tasks-on-a-microcontroller/https://hackingwithrust.com/projects/embedded-stm32/async-tasks-on-a-microcontroller/Embassy on STM32: split the polling loop into tasks that run at the same time.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/blinking-an-led/https://hackingwithrust.com/projects/embedded-stm32/blinking-an-led/Blink an LED on a NUCLEO-F401RE with stm32f4xx-hal and embedded-hal traits.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/pwm-and-controlling-brightness/https://hackingwithrust.com/projects/embedded-stm32/pwm-and-controlling-brightness/Driving an STM32 LED with PWM in Rust: timers, duty cycle and a breathing lightFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/reading-a-button-with-gpio-input/https://hackingwithrust.com/projects/embedded-stm32/reading-a-button-with-gpio-input/Reading a button on an STM32 in Rust: pull-ups, debounce, polling vs interruptsFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/serial-output-and-logging/https://hackingwithrust.com/projects/embedded-stm32/serial-output-and-logging/Rust logging on an STM32: UART text output, defmt over RTT, and why not println!Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/setting-up-the-embedded-toolchain/https://hackingwithrust.com/projects/embedded-stm32/setting-up-the-embedded-toolchain/Install the thumbv7em target and probe-rs to flash your first STM32 program.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/sleep-wake-and-battery-life/https://hackingwithrust.com/projects/embedded-stm32/sleep-wake-and-battery-life/STM32 stop mode, what wakes the chip, and the current you actually measure.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/talking-to-an-i2c-sensor/https://hackingwithrust.com/projects/embedded-stm32/talking-to-an-i2c-sensor/Reading a BMP280 over I2C on an STM32 with Rust, with the real bus trafficFri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/understanding-no-std/https://hackingwithrust.com/projects/embedded-stm32/understanding-no-std/What no_std removes in embedded Rust: allocator, panic message and libc.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/embedded-stm32/what-you-need-to-start-embedded-rust/https://hackingwithrust.com/projects/embedded-stm32/what-you-need-to-start-embedded-rust/The board, probe, and cables you need to start embedded Rust on STM32.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/react-wasm/benchmarking-wasm-honestly/https://hackingwithrust.com/projects/react-wasm/benchmarking-wasm-honestly/Benchmark wasm against JavaScript honestly: warm-up, medians, and real numbers.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/react-wasm/calling-rust-from-javascript/https://hackingwithrust.com/projects/react-wasm/calling-rust-from-javascript/Put #[wasm_bindgen] on Rust functions and call them from JavaScript via wasm.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/react-wasm/choosing-a-real-function-to-optimise/https://hackingwithrust.com/projects/react-wasm/choosing-a-real-function-to-optimise/Run the V8 profiler on the slow search and find what is worth optimising.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/react-wasm/passing-large-data-without-copying/https://hackingwithrust.com/projects/react-wasm/passing-large-data-without-copying/Load the dataset into wasm memory once, then read it via Uint8Array views.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/react-wasm/when-wasm-is-the-wrong-answer/https://hackingwithrust.com/projects/react-wasm/when-wasm-is-the-wrong-answer/Small datasets, boundary tolls, bundle size: when to keep the JavaScript.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/react-wasm/wiring-wasm-into-a-react-app/https://hackingwithrust.com/projects/react-wasm/wiring-wasm-into-a-react-app/Run a Rust wasm search in React behind Vite, in a Web Worker, without jank.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/search-engine/an-in-memory-inverted-index/https://hackingwithrust.com/projects/search-engine/an-in-memory-inverted-index/Build an inverted index in Rust: postings lists, term lookup, and a first query.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/search-engine/tokenising-and-normalising-text/https://hackingwithrust.com/projects/search-engine/tokenising-and-normalising-text/Tokenising text in Rust: lowercasing, stop words, and a small stemmer.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/projects/search-engine/what-were-building-an-inverted-index/https://hackingwithrust.com/projects/search-engine/what-were-building-an-inverted-index/Build a search engine in Rust: an inverted index, BM25 ranking, and an HTTP API.Fri, 23 Oct 2026 11:13:07 GMThttps://hackingwithrust.com/files/how-to-check-whether-a-file-or-directory-exists/https://hackingwithrust.com/files/how-to-check-whether-a-file-or-directory-exists/Check whether a path exists in Rust with Path::exists, is_file and is_dirTue, 20 Oct 2026 08:16:01 GMThttps://hackingwithrust.com/files/how-to-copy-or-move-a-file/https://hackingwithrust.com/files/how-to-copy-or-move-a-file/How to copy or move a file in Rust with fs::copy and fs::renameTue, 20 Oct 2026 08:16:01 GMThttps://hackingwithrust.com/files/how-to-delete-a-file-or-directory/https://hackingwithrust.com/files/how-to-delete-a-file-or-directory/Delete files and directories in Rust with fs::remove_file and fs::remove_dir_allTue, 20 Oct 2026 08:16:01 GMThttps://hackingwithrust.com/projects/react-wasm/setting-up-wasm-bindgen-and-wasm-pack/https://hackingwithrust.com/projects/react-wasm/setting-up-wasm-bindgen-and-wasm-pack/Add the wasm32 target, install wasm-pack, and turn a Rust crate into a pkg.Tue, 20 Oct 2026 08:16:01 GMThttps://hackingwithrust.com/projects/react-wasm/what-were-building-rust-in-the-browser/https://hackingwithrust.com/projects/react-wasm/what-were-building-rust-in-the-browser/Speed up a React search with Rust and WebAssembly, and measure it honestly.Tue, 20 Oct 2026 08:16:01 GMThttps://hackingwithrust.com/files/how-to-write-a-file-atomically/https://hackingwithrust.com/files/how-to-write-a-file-atomically/Write a file atomically in Rust: temp file, then fs::rename over the targetTue, 20 Oct 2026 03:16:23 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/building-release-bundles-for-macos-windows-linux/https://hackingwithrust.com/projects/tauri-desktop-app/building-release-bundles-for-macos-windows-linux/Turn a Tauri dev build into signed macOS, Windows, and Linux bundles.Tue, 20 Oct 2026 03:16:23 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/exporting-to-html-and-pdf/https://hackingwithrust.com/projects/tauri-desktop-app/exporting-to-html-and-pdf/Render a note with pulldown-cmark and print it to PDF from a Tauri app.Tue, 20 Oct 2026 03:16:23 GMThttps://hackingwithrust.com/files/how-to-append-to-a-file-without-overwriting-it/https://hackingwithrust.com/files/how-to-append-to-a-file-without-overwriting-it/Append to a file in Rust with OpenOptions, keeping the bytes already thereMon, 19 Oct 2026 21:09:04 GMThttps://hackingwithrust.com/files/how-to-read-a-file-into-bytes/https://hackingwithrust.com/files/how-to-read-a-file-into-bytes/Read a file into bytes with fs::read, and when a String would have failedMon, 19 Oct 2026 21:09:04 GMThttps://hackingwithrust.com/files/how-to-write-to-a-file/https://hackingwithrust.com/files/how-to-write-to-a-file/Write to a file in Rust with fs::write: create, truncate, and the errorsMon, 19 Oct 2026 21:09:04 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/file-system-and-drag-and-drop/https://hackingwithrust.com/projects/tauri-desktop-app/file-system-and-drag-and-drop/Import .md files in Tauri with the dialog and fs plugins and drag-and-drop.Mon, 19 Oct 2026 21:09:04 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/system-tray-menus-and-keyboard-shortcuts/https://hackingwithrust.com/projects/tauri-desktop-app/system-tray-menus-and-keyboard-shortcuts/Add a tray icon, native menus, and global shortcuts to a Tauri app in Rust.Mon, 19 Oct 2026 21:09:04 GMThttps://hackingwithrust.com/files/how-to-read-a-file-into-a-string/https://hackingwithrust.com/files/how-to-read-a-file-into-a-string/Read a file into a String with fs::read_to_string, and handle non-UTF-8 filesMon, 19 Oct 2026 15:53:35 GMThttps://hackingwithrust.com/files/how-to-read-a-file-line-by-line/https://hackingwithrust.com/files/how-to-read-a-file-line-by-line/Read a file line by line in Rust with BufReader, and why a bare File cannotMon, 19 Oct 2026 15:53:35 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/editing-notes-and-autosave/https://hackingwithrust.com/projects/tauri-desktop-app/editing-notes-and-autosave/Autosave edits with a debounce in React and an update_note command in Tauri.Mon, 19 Oct 2026 15:53:35 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/full-text-search-with-fts5/https://hackingwithrust.com/projects/tauri-desktop-app/full-text-search-with-fts5/Add full-text search to Tauri with SQLite FTS5, MATCH queries, and highlights.Mon, 19 Oct 2026 15:53:35 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/listing-and-reading-notes/https://hackingwithrust.com/projects/tauri-desktop-app/listing-and-reading-notes/Turn SQLite rows into a Vec<Note> and carry it across the Tauri IPC boundary.Mon, 19 Oct 2026 15:53:35 GMThttps://hackingwithrust.com/collections/how-to-store-different-types-in-one-vec/https://hackingwithrust.com/collections/how-to-store-different-types-in-one-vec/How to put different types in one Rust Vec — an enum with data in each variantMon, 19 Oct 2026 10:43:50 GMThttps://hackingwithrust.com/collections/how-to-tell-the-compiler-the-type-of-an-empty-vec/https://hackingwithrust.com/collections/how-to-tell-the-compiler-the-type-of-an-empty-vec/Two ways to type an empty Vec in Rust: a let annotation, or the turbofish.Mon, 19 Oct 2026 10:43:50 GMThttps://hackingwithrust.com/collections/how-to-use-itertools-for-iterator-helpers/https://hackingwithrust.com/collections/how-to-use-itertools-for-iterator-helpers/Rust itertools: unique, sorted, join, chunk_by — the adapters std leaves outMon, 19 Oct 2026 10:43:50 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/calling-rust-from-react-with-commands/https://hackingwithrust.com/projects/tauri-desktop-app/calling-rust-from-react-with-commands/Define a #[tauri::command], register it, and call it from React with invoke().Mon, 19 Oct 2026 10:43:50 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/persisting-data-with-sqlite/https://hackingwithrust.com/projects/tauri-desktop-app/persisting-data-with-sqlite/Add rusqlite to a Tauri app and store notes in a bundled SQLite database.Mon, 19 Oct 2026 10:43:50 GMThttps://hackingwithrust.com/collections/difference-between-an-array-and-a-vec/https://hackingwithrust.com/collections/difference-between-an-array-and-a-vec/Rust arrays vs Vec: a fixed length in the type, versus a buffer that grows.Mon, 19 Oct 2026 05:04:52 GMThttps://hackingwithrust.com/collections/how-to-get-the-largest-element-from-a-collection/https://hackingwithrust.com/collections/how-to-get-the-largest-element-from-a-collection/Get the largest element of a Vec: iter().max() once, BinaryHeap for a queueMon, 19 Oct 2026 03:15:28 GMThttps://hackingwithrust.com/collections/why-does-indexing-an-array-out-of-bounds-panic/https://hackingwithrust.com/collections/why-does-indexing-an-array-out-of-bounds-panic/Why Rust panics on an out-of-bounds array index, and how get() returns NoneMon, 19 Oct 2026 03:15:28 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/creating-a-tauri-project/https://hackingwithrust.com/projects/tauri-desktop-app/creating-a-tauri-project/Scaffold a Tauri + React project with create-tauri-app and run tauri dev.Mon, 19 Oct 2026 03:15:28 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/understanding-the-tauri-architecture/https://hackingwithrust.com/projects/tauri-desktop-app/understanding-the-tauri-architecture/Tauri app architecture: what the webview, IPC bridge, and Rust core each do.Mon, 19 Oct 2026 03:15:28 GMThttps://hackingwithrust.com/projects/tauri-desktop-app/what-were-building-a-markdown-notes-app/https://hackingwithrust.com/projects/tauri-desktop-app/what-were-building-a-markdown-notes-app/Build a desktop Markdown notes app with Tauri: React front end, Rust core.Mon, 19 Oct 2026 03:15:28 GMThttps://hackingwithrust.com/collections/how-to-count-word-frequency-with-a-hashmap/https://hackingwithrust.com/collections/how-to-count-word-frequency-with-a-hashmap/Count how often each word appears in Rust with HashMap and the entry APISun, 18 Oct 2026 22:08:45 GMThttps://hackingwithrust.com/collections/how-to-use-a-vec-as-a-queue/https://hackingwithrust.com/collections/how-to-use-a-vec-as-a-queue/Rust FIFO queue with VecDeque: push_back and pop_front, not Vec::remove(0).Sun, 18 Oct 2026 22:08:45 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/docker-config-and-deploying-to-production/https://hackingwithrust.com/projects/axum-sqlx-api/docker-config-and-deploying-to-production/Docker for a Rust API: a multi-stage build, a 151 MB image, and a real deploy.Sun, 18 Oct 2026 22:08:45 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/integration-tests-against-a-real-database/https://hackingwithrust.com/projects/axum-sqlx-api/integration-tests-against-a-real-database/Test an axum API against real Postgres with sqlx::test, one database per test.Sun, 18 Oct 2026 22:08:45 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/structured-logging-and-request-tracing/https://hackingwithrust.com/projects/axum-sqlx-api/structured-logging-and-request-tracing/Add tracing and a request id to an axum API, so every log line is traceable.Sun, 18 Oct 2026 22:08:45 GMThttps://hackingwithrust.com/collections/difference-between-hashmap-and-btreemap/https://hackingwithrust.com/collections/difference-between-hashmap-and-btreemap/Rust HashMap vs BTreeMap: when sorted iteration is worth slower lookupsSun, 18 Oct 2026 17:18:08 GMThttps://hackingwithrust.com/collections/how-to-check-whether-a-collection-contains-a-value/https://hackingwithrust.com/collections/how-to-check-whether-a-collection-contains-a-value/Check if a Vec contains a value: the contains() scan versus a HashSet lookupSun, 18 Oct 2026 17:18:08 GMThttps://hackingwithrust.com/collections/why-is-hashmap-iteration-order-random/https://hackingwithrust.com/collections/why-is-hashmap-iteration-order-random/Why HashMap iteration order is random in Rust, and how to get a stable orderSun, 18 Oct 2026 17:18:08 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/api-key-authentication-with-middleware/https://hackingwithrust.com/projects/axum-sqlx-api/api-key-authentication-with-middleware/Protect axum routes with an API key: a hand-written tower layer and 401s.Sun, 18 Oct 2026 17:18:08 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/rate-limiting-per-api-key/https://hackingwithrust.com/projects/axum-sqlx-api/rate-limiting-per-api-key/Rate-limit an axum API per key with a token bucket, 429s and Retry-After.Sun, 18 Oct 2026 17:18:08 GMThttps://hackingwithrust.com/collections/how-to-handle-missing-keys-in-a-hashmap-with-entry/https://hackingwithrust.com/collections/how-to-handle-missing-keys-in-a-hashmap-with-entry/Rust HashMap entry API: or_insert and friends handle missing keys in one lookupSun, 18 Oct 2026 13:20:05 GMThttps://hackingwithrust.com/collections/why-cant-i-use-f64-as-a-hashmap-key/https://hackingwithrust.com/collections/why-cant-i-use-f64-as-a-hashmap-key/Why f64 cannot be a Rust HashMap key: NaN breaks Eq, and what to use insteadSun, 18 Oct 2026 13:20:05 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/generating-short-codes-and-handling-collisions/https://hackingwithrust.com/projects/axum-sqlx-api/generating-short-codes-and-handling-collisions/Base62 short codes in Rust, with a unique index and a retry on collisions.Sun, 18 Oct 2026 13:20:05 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/inserting-and-reading-links/https://hackingwithrust.com/projects/axum-sqlx-api/inserting-and-reading-links/Axum and sqlx query!: INSERT a link, SELECT it back, serve a 302 redirect.Sun, 18 Oct 2026 13:20:05 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/validating-input-and-returning-proper-errors/https://hackingwithrust.com/projects/axum-sqlx-api/validating-input-and-returning-proper-errors/Return JSON error bodies with axum, validator, and thiserror.Sun, 18 Oct 2026 13:20:05 GMThttps://hackingwithrust.com/collections/how-to-deduplicate-a-vec/https://hackingwithrust.com/collections/how-to-deduplicate-a-vec/Remove duplicates from a Vec: dedup strips consecutive duplicates, sort firstSun, 18 Oct 2026 08:43:56 GMThttps://hackingwithrust.com/collections/how-to-find-an-element-in-a-vec/https://hackingwithrust.com/collections/how-to-find-an-element-in-a-vec/Find an element in a Vec: iter().find for the value, position() for the indexSun, 18 Oct 2026 08:43:56 GMThttps://hackingwithrust.com/collections/how-to-split-a-vec-into-chunks/https://hackingwithrust.com/collections/how-to-split-a-vec-into-chunks/Split a Vec into chunks: chunks(), chunks_exact(), and the short last oneSun, 18 Oct 2026 08:43:56 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/queries-the-compiler-checks/https://hackingwithrust.com/projects/axum-sqlx-api/queries-the-compiler-checks/Catch bad SQL at build time with sqlx query! macros and cargo sqlx prepare.Sun, 18 Oct 2026 08:43:56 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/writing-your-first-migration/https://hackingwithrust.com/projects/axum-sqlx-api/writing-your-first-migration/Run your first SQLx migration with sqlx-cli and apply it on service startup.Sun, 18 Oct 2026 08:43:56 GMThttps://hackingwithrust.com/collections/how-to-sort-a-vec/https://hackingwithrust.com/collections/how-to-sort-a-vec/Sort a Vec in Rust with sort, sort_by and sort_unstable, plus the float trap.Sun, 18 Oct 2026 04:53:56 GMThttps://hackingwithrust.com/collections/how-to-sort-a-vec-of-structs-by-a-field/https://hackingwithrust.com/collections/how-to-sort-a-vec-of-structs-by-a-field/Sort a Vec of structs by a field with sort_by_key, and fix the borrow error.Sun, 18 Oct 2026 04:53:56 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/adding-sqlx-and-connecting-to-postgres/https://hackingwithrust.com/projects/axum-sqlx-api/adding-sqlx-and-connecting-to-postgres/Add a SQLx PgPool to an Axum service and connect it to Postgres.Sun, 18 Oct 2026 04:53:56 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/returning-json-and-building-a-response-type/https://hackingwithrust.com/projects/axum-sqlx-api/returning-json-and-building-a-response-type/Return JSON from Axum handlers with a custom IntoResponse envelope.Sun, 18 Oct 2026 04:53:56 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/routing-and-extracting-path-and-query-parameters/https://hackingwithrust.com/projects/axum-sqlx-api/routing-and-extracting-path-and-query-parameters/Use Path and Query extractors in Axum to read route and query parameters.Sun, 18 Oct 2026 04:53:56 GMThttps://hackingwithrust.com/collections/difference-between-a-vec-and-a-slice/https://hackingwithrust.com/collections/difference-between-a-vec-and-a-slice/A Vec owns its heap buffer; a slice borrows a view of one somebody else owns.Sat, 17 Oct 2026 23:42:59 GMThttps://hackingwithrust.com/collections/how-to-accept-both-a-vec-and-a-slice-in-one-function/https://hackingwithrust.com/collections/how-to-accept-both-a-vec-and-a-slice-in-one-function/Write &[T] and one function accepts a Vec, an array or a slice — no cloning.Sat, 17 Oct 2026 23:42:59 GMThttps://hackingwithrust.com/collections/why-cant-i-modify-a-vec-while-iterating-over-it/https://hackingwithrust.com/collections/why-cant-i-modify-a-vec-while-iterating-over-it/Change a Vec while looping over it: retain, drain, or collect first.Sat, 17 Oct 2026 23:42:59 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/setting-up-axum-and-your-first-route/https://hackingwithrust.com/projects/axum-sqlx-api/setting-up-axum-and-your-first-route/Spin up an Axum web server in Rust with axum::serve and a /health route.Sat, 17 Oct 2026 23:42:59 GMThttps://hackingwithrust.com/projects/axum-sqlx-api/what-were-building-a-short-link-api/https://hackingwithrust.com/projects/axum-sqlx-api/what-were-building-a-short-link-api/Build a short link API in Rust with Axum and SQLx, one working step at a time.Sat, 17 Oct 2026 23:42:59 GMThttps://hackingwithrust.com/collections/how-to-get-an-element-from-a-vec-without-panicking/https://hackingwithrust.com/collections/how-to-get-an-element-from-a-vec-without-panicking/Vec::get returns an Option so a bad index gives None instead of a panic.Sat, 17 Oct 2026 20:46:12 GMThttps://hackingwithrust.com/collections/which-collection-should-you-use-in-rust/https://hackingwithrust.com/collections/which-collection-should-you-use-in-rust/Vec, HashMap, BTreeMap or HashSet: pick the Rust collection for the job.Sat, 17 Oct 2026 20:46:12 GMThttps://hackingwithrust.com/projects/toy-database/benchmarking-against-sled-and-rocksdb/https://hackingwithrust.com/projects/toy-database/benchmarking-against-sled-and-rocksdb/Benchmark a Rust key-value store against sled and RocksDB with criterion.Sat, 17 Oct 2026 20:46:12 GMThttps://hackingwithrust.com/projects/toy-database/range-scans-and-iterators/https://hackingwithrust.com/projects/toy-database/range-scans-and-iterators/Give a key-value store a real Iterator: range scans over merged LSM sources.Sat, 17 Oct 2026 20:46:12 GMThttps://hackingwithrust.com/projects/toy-database/what-a-real-database-does-that-we-didnt/https://hackingwithrust.com/projects/toy-database/what-a-real-database-does-that-we-didnt/What real databases add to a toy LSM store: transactions, MVCC, crash recovery.Sat, 17 Oct 2026 20:46:12 GMThttps://hackingwithrust.com/text/how-to-pad-and-align-text-in-a-table/https://hackingwithrust.com/text/how-to-pad-and-align-text-in-a-table/Pad and align text in a Rust table: width, fill characters, and dynamic widthsSat, 17 Oct 2026 16:41:52 GMThttps://hackingwithrust.com/projects/toy-database/a-write-ahead-log-and-memtable/https://hackingwithrust.com/projects/toy-database/a-write-ahead-log-and-memtable/Add a write-ahead log and a self-flushing memtable to a Rust toy LSM store.Sat, 17 Oct 2026 16:19:05 GMThttps://hackingwithrust.com/projects/toy-database/bloom-filters-to-skip-disk-reads/https://hackingwithrust.com/projects/toy-database/bloom-filters-to-skip-disk-reads/Add a bloom filter to each SSTable so a miss skips the disk read.Sat, 17 Oct 2026 16:19:05 GMThttps://hackingwithrust.com/projects/toy-database/merging-sstables/https://hackingwithrust.com/projects/toy-database/merging-sstables/Merge SSTables in a Rust toy database, with tombstones that outlive compaction.Sat, 17 Oct 2026 16:19:05 GMThttps://hackingwithrust.com/text/how-to-check-whether-a-string-contains-a-substring/https://hackingwithrust.com/text/how-to-check-whether-a-string-contains-a-substring/Rust substring search: contains, starts_with, ends_with, and case foldingSat, 17 Oct 2026 16:19:05 GMThttps://hackingwithrust.com/text/how-to-trim-and-strip-characters-from-a-string/https://hackingwithrust.com/text/how-to-trim-and-strip-characters-from-a-string/Trim Rust strings with trim() and trim_matches(), and the invisible \rSat, 17 Oct 2026 16:19:05 GMThttps://hackingwithrust.com/projects/toy-database/appending-writes-to-a-log/https://hackingwithrust.com/projects/toy-database/appending-writes-to-a-log/Make a Rust key-value store durable: append one checksummed record per write.Sat, 17 Oct 2026 11:34:27 GMThttps://hackingwithrust.com/projects/toy-database/compacting-the-log/https://hackingwithrust.com/projects/toy-database/compacting-the-log/Compact a Rust key-value store's log so deletes and overwrites free space.Sat, 17 Oct 2026 11:34:27 GMThttps://hackingwithrust.com/projects/toy-database/introducing-sstables/https://hackingwithrust.com/projects/toy-database/introducing-sstables/Give a Rust key-value store an SSTable with a sparse index for fast lookups.Sat, 17 Oct 2026 11:34:27 GMThttps://hackingwithrust.com/projects/toy-database/replaying-the-log-on-startup/https://hackingwithrust.com/projects/toy-database/replaying-the-log-on-startup/Replay a Rust key-value store's log on startup and recover from torn writes.Sat, 17 Oct 2026 11:34:27 GMThttps://hackingwithrust.com/text/how-to-replace-placeholders-in-a-template/https://hackingwithrust.com/text/how-to-replace-placeholders-in-a-template/Replace {name} placeholders in a template string, and when to use a crateSat, 17 Oct 2026 11:34:27 GMThttps://hackingwithrust.com/projects/toy-database/a-key-value-store-in-memory/https://hackingwithrust.com/projects/toy-database/a-key-value-store-in-memory/Build a Rust key-value store in memory: get, put and delete over a BTreeMap.Sat, 17 Oct 2026 06:32:57 GMThttps://hackingwithrust.com/projects/toy-database/what-were-building-a-log-structured-key-value-store/https://hackingwithrust.com/projects/toy-database/what-were-building-a-log-structured-key-value-store/Build a log-structured key-value store in Rust, one piece at a time.Sat, 17 Oct 2026 06:32:57 GMThttps://hackingwithrust.com/text/how-to-convert-a-vec-of-bytes-to-a-string/https://hackingwithrust.com/text/how-to-convert-a-vec-of-bytes-to-a-string/from_utf8 versus from_utf8_lossy: which one turns a Vec<u8> into a StringSat, 17 Oct 2026 06:32:57 GMThttps://hackingwithrust.com/text/how-to-handle-utf-8-text-in-rust/https://hackingwithrust.com/text/how-to-handle-utf-8-text-in-rust/Rust strings are UTF-8 by construction: what that guarantees, and what it costsSat, 17 Oct 2026 06:32:57 GMThttps://hackingwithrust.com/text/how-to-match-and-replace-text-with-regex/https://hackingwithrust.com/text/how-to-match-and-replace-text-with-regex/Match and replace text with the regex crate: compile the Regex once, reuse itSat, 17 Oct 2026 06:32:57 GMThttps://hackingwithrust.com/projects/cli-tool/making-it-fast-with-async/https://hackingwithrust.com/projects/cli-tool/making-it-fast-with-async/Swap reqwest blocking for tokio in a Rust CLI and run requests concurrently.Sat, 17 Oct 2026 03:20:14 GMThttps://hackingwithrust.com/projects/cli-tool/shipping-a-rust-cli/https://hackingwithrust.com/projects/cli-tool/shipping-a-rust-cli/Ship a Rust CLI: release profile, strip, cross-compile, and cargo install.Sat, 17 Oct 2026 03:20:14 GMThttps://hackingwithrust.com/projects/cli-tool/testing-a-cli-without-network/https://hackingwithrust.com/projects/cli-tool/testing-a-cli-without-network/Test a Rust CLI offline with assert_cmd and wiremock integration tests in CI.Sat, 17 Oct 2026 03:20:14 GMThttps://hackingwithrust.com/text/how-to-reverse-a-string/https://hackingwithrust.com/text/how-to-reverse-a-string/Reverse a Rust String with chars().rev().collect() — why no reverse() existsSat, 17 Oct 2026 03:20:14 GMThttps://hackingwithrust.com/text/why-cant-you-index-into-a-string/https://hackingwithrust.com/text/why-cant-you-index-into-a-string/Why you cannot index into a Rust String with s[0], and what to write insteadSat, 17 Oct 2026 03:20:14 GMThttps://hackingwithrust.com/projects/cli-tool/reading-defaults-from-a-config-file/https://hackingwithrust.com/projects/cli-tool/reading-defaults-from-a-config-file/Give a Rust CLI a TOML config file with serde, toml and the directories crate.Fri, 16 Oct 2026 22:12:27 GMThttps://hackingwithrust.com/projects/cli-tool/saving-and-reusing-requests/https://hackingwithrust.com/projects/cli-tool/saving-and-reusing-requests/Save a Rust CLI request to JSON with serde_json and replay it with hit run.Fri, 16 Oct 2026 22:12:27 GMThttps://hackingwithrust.com/text/how-to-iterate-over-the-characters-of-a-string/https://hackingwithrust.com/text/how-to-iterate-over-the-characters-of-a-string/Rust string iteration: chars() walks characters, bytes() walks UTF-8 bytes.Fri, 16 Oct 2026 22:12:27 GMThttps://hackingwithrust.com/text/how-to-slice-a-string-safely/https://hackingwithrust.com/text/how-to-slice-a-string-safely/Slice a Rust string safely: char boundaries, and why get() beats the panic.Fri, 16 Oct 2026 22:12:27 GMThttps://hackingwithrust.com/text/how-to-split-a-string/https://hackingwithrust.com/text/how-to-split-a-string/Split a string in Rust with split, split_whitespace, and split_once.Fri, 16 Oct 2026 22:12:27 GMThttps://hackingwithrust.com/projects/cli-tool/colour-and-tables-in-terminal-output/https://hackingwithrust.com/projects/cli-tool/colour-and-tables-in-terminal-output/Colour status codes and headers as a table with owo-colors and comfy-table.Fri, 16 Oct 2026 19:07:24 GMThttps://hackingwithrust.com/projects/cli-tool/handling-errors-without-panicking/https://hackingwithrust.com/projects/cli-tool/handling-errors-without-panicking/Give a Rust CLI a real error type with thiserror and friendly messages.Fri, 16 Oct 2026 19:07:24 GMThttps://hackingwithrust.com/projects/cli-tool/showing-progress-for-slow-requests/https://hackingwithrust.com/projects/cli-tool/showing-progress-for-slow-requests/Add an indicatif spinner to a Rust CLI that only appears for slow requests.Fri, 16 Oct 2026 19:07:24 GMThttps://hackingwithrust.com/text/how-to-print-to-standard-error/https://hackingwithrust.com/text/how-to-print-to-standard-error/eprintln! prints to standard error in Rust: keep stdout clean for pipes.Fri, 16 Oct 2026 19:07:24 GMThttps://hackingwithrust.com/text/how-to-print-without-a-trailing-newline/https://hackingwithrust.com/text/how-to-print-without-a-trailing-newline/Print without a newline in Rust: print!, and the flush that makes it appear.Fri, 16 Oct 2026 19:07:24 GMThttps://hackingwithrust.com/projects/cli-tool/making-an-http-request-with-reqwest/https://hackingwithrust.com/projects/cli-tool/making-an-http-request-with-reqwest/Making HTTP requests in Rust with reqwest: status, headers, body, and timeouts.Fri, 16 Oct 2026 15:14:08 GMThttps://hackingwithrust.com/projects/cli-tool/setting-up-a-rust-cli-project/https://hackingwithrust.com/projects/cli-tool/setting-up-a-rust-cli-project/Set up a Rust CLI project with cargo new: layout, first run, dependencies.Fri, 16 Oct 2026 15:14:08 GMThttps://hackingwithrust.com/text/how-to-append-to-a-string-without-extra-allocations/https://hackingwithrust.com/text/how-to-append-to-a-string-without-extra-allocations/Append to a String without extra allocations: keep the buffer, push_str into it.Fri, 16 Oct 2026 15:14:08 GMThttps://hackingwithrust.com/text/how-to-concatenate-strings-in-rust/https://hackingwithrust.com/text/how-to-concatenate-strings-in-rust/Concatenate strings in Rust with the + operator, push_str, or format!.Fri, 16 Oct 2026 15:14:08 GMThttps://hackingwithrust.com/text/how-to-format-strings-with-println-and-format/https://hackingwithrust.com/text/how-to-format-strings-with-println-and-format/Format strings with println! and format!: {}, named arguments, inline capture.Fri, 16 Oct 2026 15:14:08 GMThttps://hackingwithrust.com/text/when-to-use-string-from-vs-to-string-vs-into/https://hackingwithrust.com/text/when-to-use-string-from-vs-to-string-vs-into/String::from, to_string or into — three ways to make a String from a &str.Fri, 16 Oct 2026 11:17:48 GMThttps://hackingwithrust.com/projects/cli-tool/what-were-building-a-cli-http-client/https://hackingwithrust.com/projects/cli-tool/what-were-building-a-cli-http-client/Build hit: a command-line HTTP client in Rust, from cargo new to release binary.Fri, 16 Oct 2026 10:37:31 GMThttps://hackingwithrust.com/text/difference-between-string-and-str/https://hackingwithrust.com/text/difference-between-string-and-str/String owns a growable buffer; &str borrows bytes owned by someone else.Fri, 16 Oct 2026 10:37:31 GMThttps://hackingwithrust.com/borrowing/how-long-does-a-borrow-last/https://hackingwithrust.com/borrowing/how-long-does-a-borrow-last/How long a Rust borrow lasts: until the last use, not the end of the block.Fri, 16 Oct 2026 08:47:52 GMThttps://hackingwithrust.com/borrowing/what-is-reborrowing-in-rust/https://hackingwithrust.com/borrowing/what-is-reborrowing-in-rust/Reborrowing in Rust: why passing a &mut to a function doesn't move it.Fri, 16 Oct 2026 08:47:52 GMThttps://hackingwithrust.com/borrowing/difference-between-immutable-and-mutable-references/https://hackingwithrust.com/borrowing/difference-between-immutable-and-mutable-references/& vs &mut in Rust: many shared readers, or one exclusive writer, never both.Fri, 16 Oct 2026 04:21:56 GMThttps://hackingwithrust.com/borrowing/how-to-borrow-a-value-in-rust/https://hackingwithrust.com/borrowing/how-to-borrow-a-value-in-rust/Borrow a value in Rust with &: pass &value, and the caller keeps ownership.Fri, 16 Oct 2026 04:21:56 GMThttps://hackingwithrust.com/borrowing/what-are-the-rules-of-borrowing-in-rust/https://hackingwithrust.com/borrowing/what-are-the-rules-of-borrowing-in-rust/Rust borrowing rules: any number of & or one &mut, never a dangling reference.Fri, 16 Oct 2026 04:21:56 GMThttps://hackingwithrust.com/borrowing/what-is-the-borrow-checker/https://hackingwithrust.com/borrowing/what-is-the-borrow-checker/The borrow checker is the compiler pass that enforces Rust's borrowing rules.Fri, 16 Oct 2026 04:21:56 GMThttps://hackingwithrust.com/borrowing/why-only-one-mutable-borrow/https://hackingwithrust.com/borrowing/why-only-one-mutable-borrow/Many immutable borrows or one mutable: why Rust forbids aliasing plus mutation.Fri, 16 Oct 2026 04:21:56 GMThttps://hackingwithrust.com/ownership/how-to-understand-ownership-if-you-come-from-python-or-javascript/https://hackingwithrust.com/ownership/how-to-understand-ownership-if-you-come-from-python-or-javascript/Rust ownership for Python and JavaScript developers: moves, not shared names.Thu, 15 Oct 2026 21:56:50 GMThttps://hackingwithrust.com/ownership/how-does-rust-manage-memory-without-a-garbage-collector/https://hackingwithrust.com/ownership/how-does-rust-manage-memory-without-a-garbage-collector/Rust has no garbage collector: deterministic drop, and the cost of Rc.Thu, 15 Oct 2026 20:44:57 GMThttps://hackingwithrust.com/ownership/how-ownership-works-with-match-expressions/https://hackingwithrust.com/ownership/how-ownership-works-with-match-expressions/Which match arms move and which borrow, and the ref that changes it.Thu, 15 Oct 2026 20:44:57 GMThttps://hackingwithrust.com/ownership/how-ownership-works-with-structs/https://hackingwithrust.com/ownership/how-ownership-works-with-structs/Rust struct ownership: fields move independently, and Copy fields copy instead.Thu, 15 Oct 2026 20:44:57 GMThttps://hackingwithrust.com/ownership/how-to-fix-ownership-errors-with-vec/https://hackingwithrust.com/ownership/how-to-fix-ownership-errors-with-vec/Error E0507: why you cannot move a Vec element out by index, and the two fixes.Thu, 15 Oct 2026 20:44:57 GMThttps://hackingwithrust.com/ownership/what-happens-when-you-assign-one-struct-to-another-variable/https://hackingwithrust.com/ownership/what-happens-when-you-assign-one-struct-to-another-variable/Struct assignment in Rust moves the whole struct — and when it copies instead.Thu, 15 Oct 2026 20:44:57 GMThttps://hackingwithrust.com/ownership/how-to-loop-over-a-vec-without-moving-it/https://hackingwithrust.com/ownership/how-to-loop-over-a-vec-without-moving-it/Loop over a Vec in Rust without moving it: for x in &vec, the Vec stays usable.Thu, 15 Oct 2026 14:46:24 GMThttps://hackingwithrust.com/ownership/how-to-pass-a-vec-to-a-function-without-cloning-it/https://hackingwithrust.com/ownership/how-to-pass-a-vec-to-a-function-without-cloning-it/Pass a Vec to a Rust function without cloning it: take &[T], call with &vec.Thu, 15 Oct 2026 14:46:24 GMThttps://hackingwithrust.com/ownership/how-to-return-ownership-from-a-function/https://hackingwithrust.com/ownership/how-to-return-ownership-from-a-function/A Rust function returns ownership by naming the owned type — no clone needed.Thu, 15 Oct 2026 14:46:24 GMThttps://hackingwithrust.com/ownership/what-is-a-partial-move-in-rust/https://hackingwithrust.com/ownership/what-is-a-partial-move-in-rust/A partial move: one field leaves a Rust struct; the whole struct is unusable.Thu, 15 Oct 2026 14:46:24 GMThttps://hackingwithrust.com/ownership/when-should-you-clone-in-rust/https://hackingwithrust.com/ownership/when-should-you-clone-in-rust/Three cases where clone() is the right call in Rust, and when to borrow instead.Thu, 15 Oct 2026 14:46:24 GMThttps://hackingwithrust.com/ownership/how-move-semantics-work-in-rust/https://hackingwithrust.com/ownership/how-move-semantics-work-in-rust/What a Rust move copies in memory, and what it leaves untouched on the heap.Thu, 15 Oct 2026 07:41:12 GMThttps://hackingwithrust.com/ownership/how-to-pass-ownership-of-a-value-to-a-function/https://hackingwithrust.com/ownership/how-to-pass-ownership-of-a-value-to-a-function/Passing a value to a Rust function moves it when the parameter is the type.Thu, 15 Oct 2026 07:41:12 GMThttps://hackingwithrust.com/ownership/how-to-tell-whether-a-type-moves-or-copies/https://hackingwithrust.com/ownership/how-to-tell-whether-a-type-moves-or-copies/Test whether a Rust type moves or copies, and how to make your own type Copy.Thu, 15 Oct 2026 07:41:12 GMThttps://hackingwithrust.com/ownership/why-cant-you-use-a-value-after-moving-it/https://hackingwithrust.com/ownership/why-cant-you-use-a-value-after-moving-it/Why Rust rejects any use of a moved value, and the double free it prevents.Thu, 15 Oct 2026 07:41:12 GMThttps://hackingwithrust.com/ownership/why-does-my-string-not-implement-copy/https://hackingwithrust.com/ownership/why-does-my-string-not-implement-copy/Why String is not Copy in Rust: a byte copy would duplicate the heap pointer.Thu, 15 Oct 2026 07:41:12 GMThttps://hackingwithrust.com/ownership/what-happens-to-the-original-variable-after-a-move/https://hackingwithrust.com/ownership/what-happens-to-the-original-variable-after-a-move/In Rust a moved-from variable is not cleared, just marked invalid.Thu, 15 Oct 2026 00:44:31 GMThttps://hackingwithrust.com/ownership/what-is-ownership-in-rust/https://hackingwithrust.com/ownership/what-is-ownership-in-rust/Ownership in Rust: one owner per value, freed at the end of its scope.Thu, 15 Oct 2026 00:44:31 GMThttps://hackingwithrust.com/ownership/why-does-rust-have-ownership/https://hackingwithrust.com/ownership/why-does-rust-have-ownership/Why Rust prevents double free and use-after-free without a garbage collector.Thu, 15 Oct 2026 00:44:31 GMThttps://hackingwithrust.com/basics/how-to-break-out-of-two-nested-loops-at-once/https://hackingwithrust.com/basics/how-to-break-out-of-two-nested-loops-at-once/Rust loop labels: how to break out of two nested loops at onceWed, 14 Oct 2026 21:04:19 GMThttps://hackingwithrust.com/basics/how-to-iterate-over-an-array/https://hackingwithrust.com/basics/how-to-iterate-over-an-array/Iterate a Rust array by value, by reference or mutably, and know when it moves.Wed, 14 Oct 2026 21:04:19 GMThttps://hackingwithrust.com/basics/how-to-use-the-range-syntax/https://hackingwithrust.com/basics/how-to-use-the-range-syntax/Rust range syntax: .. stops before the end value, ..= includes it.Wed, 14 Oct 2026 21:04:19 GMThttps://hackingwithrust.com/basics/difference-between-const-and-static/https://hackingwithrust.com/basics/difference-between-const-and-static/A const is inlined at every use; a static is one address for the whole program.Wed, 14 Oct 2026 17:40:37 GMThttps://hackingwithrust.com/basics/how-to-return-a-value-from-a-function/https://hackingwithrust.com/basics/how-to-return-a-value-from-a-function/Why a Rust function returns nothing: the missing semicolon on the last line.Wed, 14 Oct 2026 17:40:37 GMThttps://hackingwithrust.com/basics/why-do-if-branches-need-the-same-type/https://hackingwithrust.com/basics/why-do-if-branches-need-the-same-type/Rust if/else is one expression, so both branches must produce the same type.Wed, 14 Oct 2026 17:40:37 GMThttps://hackingwithrust.com/basics/why-does-rust-require-the-mut-keyword/https://hackingwithrust.com/basics/why-does-rust-require-the-mut-keyword/What let mut changes in Rust, and why bindings are immutable by default.Wed, 14 Oct 2026 17:40:37 GMThttps://hackingwithrust.com/basics/why-shadow-a-variable-instead-of-using-mut/https://hackingwithrust.com/basics/why-shadow-a-variable-instead-of-using-mut/Shadowing declares a new binding — which can change the type. mut can only change the value, never the type.Wed, 14 Oct 2026 17:40:37 GMThttps://hackingwithrust.com/start/should-you/how-long-does-it-take-to-learn-rust/https://hackingwithrust.com/start/should-you/how-long-does-it-take-to-learn-rust/How long it really takes to learn Rust, and which stage takes the longest.Wed, 14 Oct 2026 07:54:07 GMThttps://hackingwithrust.com/start/should-you/what-can-you-build-with-rust/https://hackingwithrust.com/start/should-you/what-can-you-build-with-rust/What you can build with Rust: CLI tools, servers, and WebAssembly.Wed, 14 Oct 2026 07:54:07 GMThttps://hackingwithrust.com/start/should-you/is-rust-a-good-first-programming-language/https://hackingwithrust.com/start/should-you/is-rust-a-good-first-programming-language/Rust is a hard first programming language, but it teaches what Python hides.Wed, 14 Oct 2026 05:59:43 GMThttps://hackingwithrust.com/cargo/what-does-cargo-check-do/https://hackingwithrust.com/cargo/what-does-cargo-check-do/cargo check type-checks your code and stops before generating machine code. Here is what that saves, what it misses, and measured timings against cargo build.Wed, 14 Oct 2026 04:11:43 GMThttps://hackingwithrust.com/cli/how-to-pass-arguments-to-a-rust-program-with-cargo-run/https://hackingwithrust.com/cli/how-to-pass-arguments-to-a-rust-program-with-cargo-run/Pass arguments through cargo run with the double dash, read them with std::env::args, and know exactly when cargo eats an argument instead of forwarding it.Wed, 14 Oct 2026 04:11:43 GMThttps://hackingwithrust.com/start/should-you/how-to-use-the-rust-playground/https://hackingwithrust.com/start/should-you/how-to-use-the-rust-playground/Run Rust in your browser with no install. How to use the Rust Playground to run code, share a permalink, and read the MIR and assembly views.Wed, 14 Oct 2026 04:11:43 GMThttps://hackingwithrust.com/compiler-errors/e0382-borrow-of-moved-value/https://hackingwithrust.com/compiler-errors/e0382-borrow-of-moved-value/Fix Rust error E0382 by borrowing instead of moving, cloning deliberately, or restructuring ownership — with the exact compiler output and the trade-offs of each fix.Tue, 13 Oct 2026 14:09:43 GMThttps://hackingwithrust.com/ownership/why-does-rust-move-values/https://hackingwithrust.com/ownership/why-does-rust-move-values/Understand what a move is in Rust, why assignment transfers ownership instead of copying, and which types are Copy so they never move at all.Tue, 13 Oct 2026 14:09:43 GMThttps://hackingwithrust.com/projects/cli-tool/parsing-arguments-with-clap/https://hackingwithrust.com/projects/cli-tool/parsing-arguments-with-clap/Add subcommands, flags and help text to a Rust CLI using clap's derive API — including the gotchas that break your first attempt.Tue, 13 Oct 2026 14:09:43 GMT