Regular Expressions 101

Pro

Group 1(:[A-z]\w+)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[A-z]

A-zone character from A (65₁₀) to z (122₁₀) (case sensitive)

\w+any word character, repeated at least once

Negative Lookahead(?!.*\1)

.*any character (except for line terminators), repeated any number of times

\1the text saved by group 1

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

(:[A-z]\w+)(?!.*\1)

New

test :one
 :one test :one test :two

test :one
 :one test :one test :two