Regular Expressions 101

^start of line

\w+any word character, repeated at least once

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Non-Capturing Group(?:(?!.*[.!?])(.*))?

?repeats the group contents below at most once:

Negative Lookahead(?!.*[.!?])

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

Character Class[.!?]

.the literal . (46₁₀ / 56₈ / 2E₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

Group 1(.*)

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

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

Regular Expression

^\w+:(?:(?!.*[.!?])(.*))?

New

Choose: blah blah blah 123 for 100'ish characters, this matches

Choose: blah blah blah 123! for 100'ish characters?, .this potential match fails for the ! ? and .

Extraction

Choose: blah blah blah 123 for 100'ish characters, this matches

Choose: blah blah blah 123! for 100'ish characters?, .this potential match fails for the ! ? and .