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Snippet Library.

Persist React State with `useLocalStorage` Custom Hook

A reusable React hook to store and retrieve state from browser's localStorage, maintaining data across page refreshes for user preferences or forms.

Adapt UI with `useMediaQuery` for Responsive React Components

Create a custom React hook to detect CSS media query matches, enabling dynamic component rendering or styling based on screen size or device capabilities.

Accurately Measure DOM Layout with `useLayoutEffect`

Learn to use `useLayoutEffect` in React for synchronous DOM updates and measurements, crucial for preventing visual glitches when layout changes depend on computations.

Improve Responsiveness with `useTransition` for Non-Urgent React Updates

Leverage React 18's `useTransition` hook to mark state updates as non-urgent, keeping the UI responsive during long-running data-intensive operations.

Automate Full Website Backups (Files & DB)

Create a robust bash script to automate daily backups of your web application's files and MySQL/PostgreSQL database, storing them with timestamps for recovery.

Deploy Website Files with Rsync

Efficiently deploy your website's updated files to a remote server using rsync over SSH, ensuring only changed files are transferred for faster deployments.

Monitor Web Service Health with HTTP Status

Create a bash script to periodically check the HTTP status code of a web service endpoint and report if it's down or returning error codes (e.g., 4xx, 5xx).

Parse API JSON Responses with JQ

Use a bash script with `jq` to extract, filter, and transform specific data from JSON API responses, enabling efficient command-line data processing and automation.

Auto-Cleanup Old Log Files

Implement a bash script to automatically delete log files older than a specified number of days, freeing up valuable disk space on your web server and preventing log bloat.

Recursively Merge Two Dictionaries for Configuration Overrides

Learn to perform a deep merge of two Python dictionaries, essential for combining default settings with user-specific configurations in web applications.

Efficiently Group Data by Key Using collections.defaultdict

Learn to group a list of dictionaries or objects by a specific key using `collections.defaultdict` in Python, perfect for aggregating data from databases or APIs.

Filter and Transform Data with Python List Comprehensions

Master list comprehensions to concisely filter and transform data from API responses or database queries, improving code readability and performance in Python web apps.