regex101: build, test, and debug regex
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
RegEX Cheat Sheet & Quick Reference
In [ ] always escape . \ ] and sometimes ^ - . *? +? {n,}? Match single digit 9, not 19, 91, 99, etc.. \d{5}(-\d{4})? Parser tries EACH alternative if match fails after group. Can lead to catastrophic …
Mega Lucario Z Debuts in Pokémon Legends: Z‑A – Mega …
16 hours ago · The first Z Mega Evolution being introduced in Pokémon Legends: Z-A – Mega Dimension is Mega Lucario Z. While Mega Lucario concentrates its aura into a destructive …
Regular expression syntax cheat sheet - JavaScript | MDN
Jul 8, 2025 · Word character class escape: Matches any alphanumeric character from the basic Latin alphabet, including the underscore. Equivalent to [A-Za-z0-9_]. For example, /\w/ …
Regex Tutorial - How to write Regular Expressions?
Apr 12, 2024 · Here's how to write regular expressions: Start by understanding the special characters used in regex, such as ".", "*", "+", "?", and more. Choose a programming language …
Regex Cheat Sheet
Jan 5, 2025 · Example: a{3} matches aaa. (abc): Captures abc as a group. (?:abc): Matches abc without capturing. (?<name>abc): Captures abc and names it name.
Regex Cheatsheet - Quick Reference for Regular Expressions
It covers character classes, anchors, quantifiers, groups, common patterns, command combos, and more. Use it to boost your productivity in pattern matching and text processing. Use the …
Regular Expression [^a-zA-Z] Explained - CodePal
Learn about the regular expression [^a-zA-Z] and how it matches any character that is not a letter. Find out its common use cases and best practices for efficient regex usage.
Ultimate RegEX Cheat Sheet: Quick Reference Guide for
What is a RegEX Cheat Sheet? A RegEx, short for Regular Expression, is a sequence of characters that form a search pattern. This search pattern can be used in string searching …
Regular expression "^ [a-zA-Z]" or " [^a-zA-Z]" - Stack Overflow
Jan 5, 2011 · ^ outside of the character class (" [a-zA-Z]") notes that it is the "begins with" operator. ^ inside of the character negates the specified class. So, "^ [a-zA-Z]" translates to …