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
Go
time.Since — Easy Benchmark Timing
`time.Since(start)` is shorthand for `time.Now().Sub(start)`. Pair with `defer` for a quick "how long did this function take?" measurement.
@admin
HTML
Preload + Preconnect for Critical Resources
`<link rel="preload">` fetches a critical asset early (fonts, hero image, above-fold CSS). `preconnect` opens the TCP+TLS handshake to a third-party origin you'll need soon. Both cut perceived load time.
Bash
Show Current Branch in Prompt
Append the git branch to your bash prompt. Survives non-git dirs gracefully (just shows nothing). Drop into ~/.bashrc.
Bash
PID File Management
Write a daemon's PID to a file at start, check on subsequent runs, clean up on exit. Avoids two copies of the same daemon when the script is invoked twice.
TypeScript
useLocalStorage — Synced State
A useState replacement that persists to localStorage and syncs across tabs via the `storage` event. Strongly typed via the initial value's type.
PHP
Mask Sensitive Strings (credit cards / emails)
Mask the middle of a string while keeping a few characters at each end visible. Useful for displaying credit card numbers, emails, or API keys in UI without leaking them in full.
JavaScript
Long Polling Helper
Implements a long-polling loop that repeatedly calls a fetch endpoint and invokes a callback with the result. Backs off exponentially on errors and stops cleanly when cancelled via the returned stop function. A simple alternative to WebSockets for low-frequency server-push events without SSE support.
Kotlin
Custom Property Delegate
Any object with `getValue` / `setValue` operator methods can serve as a delegate. Lets you encapsulate cross-cutting behavior (logging, persistence, validation).
JavaScript
Scroll to Element Smoothly
Scrolls the page to a target element with an optional pixel offset (useful when a fixed header is present). Uses the native scrollIntoView with smooth behaviour when supported, and falls back to a manual scrollTo with a configurable offset. Pass a CSS selector string or an Element reference.
JavaScript
Intersection Observer (Lazy Load / Reveal)
Uses the IntersectionObserver API to trigger a callback when elements enter the viewport. The reveal pattern adds a visible class to animate elements as they scroll into view. The lazyLoad pattern loads images on demand by swapping data-src to src. Much more performant than scroll event listeners.
Go
Channels — Basics
Channels are typed pipes between goroutines. Unbuffered = synchronous handoff; buffered = up to N values queued. Close a channel to signal "no more values" — receivers see ok=false.
Bash
Parse --flag=value Arguments
A getopts-free arg parser handling long flags, equals-separated values, and bundled short flags. Customize as needed.
Kotlin
Immutable vs Mutable Collections
`listOf` / `setOf` / `mapOf` build READ-ONLY views; `mutableListOf` / `mutableSetOf` / `mutableMapOf` are mutable. Default to immutable — the call site is a contract about intent.
Kotlin
Type Aliases
`typealias` gives a shorter / more meaningful name to an existing type. Compile-time only — no new type, no overhead. Great for taming verbose function types or generic parameters.
Rust
Custom Iterator Implementation
Implementing `Iterator` is just supplying a `next() -> Option<Item>`. You automatically gain `map`, `filter`, `collect`, and every other adapter for free.
Python
asyncio.gather with Errors Tolerated
`gather(*tasks)` cancels everything on the first failure — usually NOT what you want. `return_exceptions=True` lets every task finish, returning the exception in place of a result. Perfect for fan-out HTTP fetches.
JavaScript
Animate Counter (Number Roll-Up)
Smoothly animates a number from a start value to an end value over a given duration using requestAnimationFrame. Supports a custom easing function (defaults to ease-out quad). Ideal for dashboard stat widgets, donation counters, and any UI where a bare static number would be less impactful.
JavaScript
Slugify String
Converts any string into a URL-safe slug: lowercases it, replaces accented characters with ASCII equivalents, strips all non-alphanumeric characters (except hyphens), and collapses multiple hyphens into one. Ideal for generating URL slugs from blog titles, product names, or user input.