Regular Expressions 101

Pro

1st Alternative\b(?:hello|meeting)\b

\ba Unicode word boundary

Non-Capturing Group(?:hello|meeting)

1st Alternativehello

hellothe literal text hello (case sensitive)

2nd Alternativemeeting

meetingthe literal text meeting (case sensitive)

\ba Unicode word boundary

2nd Alternative([^\W\d_])\1+

Group 1([^\W\d_])

Negated Character Class[^\W\d_]

\Wany character that is not a Unicode word character

\da Unicode decimal digit

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\1+the text saved by group 1, repeated at least once

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

\b(?:hello|meeting)\b|([^\W\d_])\1+

New

hello, join this meeting heere using thiis lllink

hello, join this meeting heere using thiis lllink