GV

GeezerVison

The World Wide Web, restored to 800 pixels of glory.

Home|About|Gaming cabinet|Archives|How it works|Starter sites

On this site

  • RegexLearn
  • Learn
  • Cheatsheet
  • Playground

This view

  • Original page
  • New address

GeezerVison is showing regexlearn.com — Regex Learn - Playground

Regex
//g
Text
Regular Expressions, abbreviated as Regex or Regexp, are a string of characters created within the framework of Regex syntax rules. You can easily manage your data with Regex, which uses commands like finding, matching, and editing. Regex can be used in programming languages such as Python, SQL, JavaScript, R, Google Analytics, Google Data Studio, and throughout the coding process. Learn regex online with examples and tutorials on RegexLearn now.

Anchors

^Start of string or line
$End of string or line
\bWord Boundary
\BNot Word Boundary

Flags

iIgnore Case
gGlobal
mMultiline

Groups & References

()Group
\1Reference
(?:)Non-capturing Group

Character Classes

[abc]Character Set
[^abc]Negated Character Set
[a-z]Range
.Dot
\wWord
\WNot Word
\dDigit
\DNot Digit
\sWhitespace
\SNot Whitespace

Lookarounds

(?=)Positive Lookahead
(?!)Negative Lookahead
(?<=)Positive Lookbehind
(?<!)Negative Lookbehind

Quantifiers and Alternation

+Plus
*Asterisk
{1,3}Quantifier
?Optional
|Alternation
Report a Problem
You are visitor 01402503 — GeezerVison does not store the pages you look up.
Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required.