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Sep 24, 202696views

Regex Lookahead Explained: Positive and Negative Lookahead Examples

Lookahead in regex sounds scarier than it is. Practical examples with passwords, file extensions, and repeated...

#regex lookahead#positive lookahead#negative lookahead#regex examples

Oct 04, 202610views

Regex for Email Validation: Patterns, Edge Cases, and the Mistakes That Slip Through

A practical guide to validating email addresses with regex: the pragmatic pattern most apps should use, edge c...

#regex email#email validation#regex patterns#form validation

Sep 29, 202664views

Regex for Email Domain Validation: Examples and Common Pitfalls

A practical regex for validating the domain part of an email address, with a Python example and the pitfalls p...

#email domain validation regex#python regex#regex tutorial

Sep 26, 202679views

Regex Find and Replace in VSCode: Complete Guide

VSCode's regex find-and-replace is one of its most powerful features. Here are the patterns I use daily to ref...

#regex vscode#find and replace#vscode tips#regex tutorial

Sep 21, 2026115views

How to Test Regex in JavaScript: test(), match(), exec(), and matchAll()

Compare test(), match(), exec(), and matchAll() in JavaScript, with runnable examples and a deep dive into the...

#javascript regex#regex test#exec#matchAll

Sep 18, 2026202views

How to Replace Text with Python Regex: re.sub() Examples and Common Mistakes

Learn how to replace text safely with Python re.sub(), including capture groups, callback functions, case-inse...

#python regex replace#re.sub#regex capture groups#regex callback

Sep 15, 2026211views

How to Extract Email Addresses from Text with Regex in Python and JavaScript

Extract email addresses from any text with regex in Python and JavaScript: the pattern explained piece by piec...

#regex extract email#email regex python#email regex javascript#extract emails from text

Sep 12, 2026211views

Regex for Numbers Only: Integers, Decimals, Negative Values, and Leading Zeros

Choose the right regex for numbers-only input. This guide covers ASCII digits, integers, decimals, negative va...

#regex for numbers only#numbers only regex#integer regex#decimal regex

Sep 09, 2026287views

Regex for IP Addresses: Accurate IPv4 and IPv6 Validation Examples

Use regex to find possible IP addresses, then use the right validation rule for the job. This guide covers loo...

#regex for IP address#IP address regex#IPv4 regex#IPv6 regex

Sep 07, 2026268views

Password Validation Regex: Examples for Length, Numbers, Symbols, and Strong Passwords

Learn practical password validation regex patterns for length, digits, symbols, and mixed character classes. T...

#password validation regex#regex for password validation#strong password regex#regex lookahead

Sep 03, 2026245views

How to Validate a URL with Regex: HTTP, HTTPS, Domains, and Query Strings

Build a practical HTTP and HTTPS URL regex by separating schemes, DNS domains, ports, paths, query strings, an...

#URL validation regex#regex for URL validation#HTTP URL regex#HTTPS URL regex

Aug 31, 2026208views

What Is the Best Regex for Email Validation? Practical Patterns and Limitations

Choose a simple or practical email-validation regex based on your input policy, compare JavaScript and Python ...

#email validation regex#regex for email validation#email regex#JavaScript regex