PHP

Verify a JWT (HS256)

Pair to jwtSign: verify the signature, check the exp claim, and return the decoded payload — or null on any failure. Uses hash_equals for constant-time signature comparison.

2h ago 0

TypeScript

Format Duration in ms

Render a number of milliseconds as a human-friendly duration: "1h 23m 45s". Skips leading-zero units automatically so short durations are concise.

2h ago 0

Python

Word-Safe Truncate

Cap a string at `max_len` chars without splitting a word; append an ellipsis when truncated. Backs off to the last space if cutting mid-word would happen.

2h ago 0

Bash

Background Jobs + wait

Run several commands in parallel with `&`, then wait for all of them with `wait`. Collect exit codes via $! and check after wait returns.

2h ago 0

Bash

Pretty-Print JSON from cURL

Pipe API responses through jq for syntax-colored, indented output. Also great for extracting specific fields without writing a parser.

2h ago 0

Java

Collectors.groupingBy — Group by Key

Like SQL GROUP BY for streams. Produces a `Map<K, List<V>>` (or any downstream collector you specify). Indispensable for analytics-style aggregations.

2h ago 0

Java

Path Operations — Resolve, Relativize, Normalize

`Path` (NIO) replaces `File` for new code. Operator-like methods compose paths cleanly across OSes — and the underlying file isn't touched until you do I/O.

2h ago 0

Java

JUnit 5 — Parameterized Tests

`@ParameterizedTest` runs the same test with multiple inputs. Use `@CsvSource`, `@MethodSource`, or `@EnumSource` for data. Eliminates copy-paste in test classes.

2h ago 0

PHP

Email Address Obfuscator

Render an email address as HTML that is human-readable but resistant to naive scraping bots. Uses entity encoding and an optional Caesar-style ROT for the mailto link.

2h ago 0

PHP

Recursively Delete Directory

Remove a directory and everything under it. Defensive against symlinks (unlinks the symlink rather than recursing into it). Returns the count of items removed.

2h ago 0

Python

Stream Large CSV with DictReader

Iterate over a CSV row-by-row as a dict — never loading the whole file. Tolerant of UTF-8 BOMs (utf-8-sig). Generator wrapper makes consumers naturally use for/break.

2h ago 0

Bash

Format Date Like a Pro

`date` accepts a format string + optional override of the date being formatted. The +%FT%TZ form gives you ISO-8601 / RFC-3339 in one call.

2h ago 0

Go

json.RawMessage — Deferred Decoding

`json.RawMessage` is a `[]byte` that survives a decode pass. Use it for envelope-style JSON where one field's type depends on another (e.g. `{"type":"X","payload":{...}}`).

2h ago 0

SQL

ROW_NUMBER OVER PARTITION

Number rows within a partition — the most common "give me the Nth thing per group" pattern. Pair with a WHERE rn = 1 in an outer query to keep just the top row per group.

2h ago 0

HTML

Iframe with Sandbox + lazy loading

Embed third-party content (YouTube, Stripe, maps) safely. `sandbox` restricts what the embedded page can do. `loading="lazy"` defers offscreen iframes — huge perf win for blog posts with multiple embeds.

2h ago 0

Kotlin

kotlinx.serialization — JSON Basics

Compile-time code generation for JSON serialization. Annotate `@Serializable` on a data class; `Json.encodeToString` and `Json.decodeFromString` are typed.

2h ago 0

Kotlin

java.time — When You Need JVM Interop

On the JVM, `java.time` is fine — and often necessary for interop with Java APIs. Kotlin's extension methods make it ergonomic enough that you might never reach for kotlinx-datetime.

2h ago 0

PHP

Human-Readable "Time Ago"

Convert a timestamp into a short relative phrase: "just now", "5 minutes ago", "3 days ago". Falls back to an absolute date once the delta exceeds a year.

2h ago 0

PHP

Date Range Iterator

Yield each date in a [start, end] interval as a DateTimeImmutable, with a configurable step. Builds on DatePeriod under the hood — but exposes a generator so you can break out early.

2h ago 0

PHP

Pretty-Print JSON

One-liner wrapper around json_encode with the right flags: indented, no escaped slashes, no escaped unicode. Use it everywhere instead of raw json_encode for human-readable output.

2h ago 0

Bash

Add / Subtract Time from Date

GNU date accepts natural-language deltas: "+1 day", "-3 weeks", "now + 2 hours". Combine with -d to compute against any reference date.

2h ago 0

Rust

anyhow for Application Errors

`anyhow::Result<T>` is `Result<T, anyhow::Error>` — a type-erased error that captures any other error AND adds context via `.context()`. The app-author's pick (use thiserror for libraries).

2h ago 0

Go

strings package essentials

The most-reached-for functions in the `strings` package: Split, Contains, TrimSpace, ToLower/Upper, Replace, Index, HasPrefix/Suffix.

2h ago 0

Java

JUnit 5 — Basic Test

JUnit 5 is the modern standard. `@Test` marks a method as a test; `Assertions.*` provides the assertion API. `@BeforeEach` runs setup before every test.

2h ago 0

HTML

Breadcrumb Navigation (with Schema)

A keyboard- and screen-reader-friendly breadcrumb. The `aria-label="Breadcrumb"` on `<nav>` announces the role; `aria-current="page"` marks the final segment. Add the JSON-LD for Google's rich result.

2h ago 0

PHP

Convert Camel Case ↔ Snake Case

Convert between camelCase and snake_case identifiers. Handy when mapping JS API responses (camelCase) into PHP database column names (snake_case) and vice versa.

2h ago 0

Python

Slugify (unicodedata, zero deps)

Convert any string to a URL-safe slug using only stdlib. Normalizes Unicode (NFKD), strips combining marks, lowercases, replaces non-alphanumerics with a separator.

2h ago 0

Bash

Multipart File Upload via cURL

Upload one or more files using -F. Optional extra form fields go through the same flag — quote carefully to preserve spaces.

2h ago 0

Rust

Rayon — Parallel Iterators

`rayon` lets you parallelize CPU-bound iterator chains by changing `.iter()` to `.par_iter()`. Handles thread-pool, work-stealing, and synchronization for you.

2h ago 0

Go

sql.NullString — Nullable DB Columns

Plain `string` can't represent SQL NULL. Use `sql.NullString` (and its siblings `NullInt64`, `NullBool`, etc.) for columns where NULL is a real value distinct from empty.

2h ago 0