The Ultimate
Snippet Library.

Filter Multidimensional Array by Multiple Criteria

Discover how to apply complex filtering logic to a multidimensional array, selecting elements that match specific conditions across various keys simultaneously.

Recursively Flatten a Multidimensional Array

Learn to convert a deeply nested, multidimensional array into a single-dimensional array, preserving all values regardless of their original depth.

Reorder Array Based on Key Order Map

Explore how to resequence an array of items (or associative array keys) according to a predefined order list, useful for custom sorting and display.

Auto-Focus an Input Field with useRef

Learn how to use React's `useRef` hook to programmatically focus an input field or interact directly with other DOM elements after component mounts.

Memoize Callback Functions with useCallback

Optimize React performance with `useCallback`. Prevent unnecessary child component re-renders by memoizing functions passed as props, ensuring stable references.

Memoize Expensive Computations with useMemo

Boost React performance with `useMemo`. Cache results of expensive computations or object creations, preventing re-computation on every render for efficiency.

Manage Complex State with useReducer

Master React's `useReducer` for complex state management. Centralize logic for states with multiple sub-values or intricate transitions, enhancing predictability.

Persist State to Local Storage with useLocalStorage Hook

Build a `useLocalStorage` React hook to easily persist component state in the browser's local storage. Handles initial values, JSON serialization, and updates.

Check SSL Certificate Expiry and Send Notification

Monitor the expiration date of an SSL certificate for a given domain and send a notification if it's nearing expiry, preventing service interruptions.

Find and Delete Old Files by Age and Extension

Recursively locate and remove files older than a specified number of days, filtered by file extension, to help manage disk space on web servers.

Synchronize Local Files to Remote Server with rsync

Efficiently deploy and synchronize local website files to a remote server using rsync, transferring only changed files and excluding specific patterns for faster updates.

Basic Web Service Health Check with cURL

Perform a simple health check on a web service endpoint using cURL, verifying its HTTP status code and response time, useful for monitoring.