Tags
#php
#kotlin
#bash
#go
#sql
#rust
#typescript
#html
#java
#python
#files
#utils
#strings
#http
#concurrency
#async
#json
#arrays
#security
#types
#crypto
#database
#dates
#format
HTML
Main Content + Aside Sidebar
`<main>` wraps the unique-to-this-page content (screen readers jump to it with a keyboard shortcut). `<aside>` is supporting / tangential content — sidebars, callouts, related links.
@admin
Kotlin
Compose LaunchedEffect — Side Effects
`LaunchedEffect(key)` runs a coroutine when the key changes. Use for one-shot init, snapshot listening, data loading, or any suspend work tied to a composition.
Kotlin
StateFlow — Observable State
`StateFlow<T>` is a hot Flow holding a single current value. Perfect for UI state in Compose/Android — always has a value, conflates intermediate values, multi-subscriber.
JavaScript
String Template Tag — SQL / HTML Sanitiser
A tagged template literal that automatically escapes interpolated values, preventing SQL injection (server-side) or XSS (client-side) from untrusted input. The html tag HTML-encodes values; the sql tag parameterises values and returns a { text, values } tuple ready for a parameterised query driver.
SQL
Full-Text Search (PostgreSQL tsvector)
`tsvector` + `tsquery` is built-in full-text search — stemming, ranking, multilingual. For most apps this beats reaching for Elasticsearch right away.
TypeScript
AbortController-Wrapped Fetch
Wire an AbortController so you can cancel in-flight fetches when the user navigates away or types another search query. The optional timeout helper rejects automatically.
Kotlin
use { } — Auto-Close Resources
`use { }` calls `close()` on any `Closeable` (file, stream, JDBC connection, …) when the block exits — even on exception. Kotlin's try-with-resources.
Python
Timing Decorator with Logger
Drop @timed on any function and get its wall-clock duration logged on every call. Uses functools.wraps so introspection (name, docstring, signature) still works.
HTML
Tabs (ARIA tablist pattern)
The accessible tab pattern: a `role="tablist"` container, each tab as `role="tab"`, panels as `role="tabpanel"`. `aria-selected` + `aria-controls` link them and announce state.
JavaScript
Debounce
Delays invoking a function until after a specified wait time has elapsed since the last time it was called. Essential for search inputs, resize handlers, and any event that fires rapidly — prevents excessive function calls and improves performance.
Kotlin
takeIf / takeUnless — Conditional Pipelines
`takeIf { predicate }` returns `this` if the predicate holds, else null. `takeUnless` is the inverse. Combine with `?.let { ... }` for clean conditional transformations.
JavaScript
Queue (Async Task Queue)
A serialised async task queue that executes queued async functions one at a time, in order. Useful for sequencing operations that must not run concurrently (file writes, ordered API mutations, step-by-step wizards). add() returns a Promise that resolves/rejects when that specific task completes.
Bash
Spinner During Long Task
Show a rotating spinner next to a status message while a background command runs. Cosmetic but vastly improves the user experience of long scripts.
Kotlin
Read a File — Whole, Lines, or Stream
Stdlib extensions on `java.io.File` and `java.nio.file.Path`. Use `readText()` for small files, `useLines { }` for memory-efficient line-by-line.
Go
Atomic File Write (temp + rename)
Write to a temp file in the SAME directory, then `os.Rename` to the final name. Rename is atomic on POSIX — readers never see a half-written file.
Bash
Find Commit That Introduced a String
`git log -S` (the "pickaxe") finds commits whose diff added or removed a given string. The fastest way to answer "when did this line first appear?"
Bash
Wait For Docker Container to Be Healthy
docker-compose entrypoints often need to wait for a sibling service (DB, cache) to be healthy before starting work. Poll the health-check status until healthy or timeout.