Regular Expressions 101

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

Group 1(\d+)

\d+a digit, repeated at least once

\ban ASCII word boundary

Positive Lookbehind(?<=\b(?=\|?\1\b).{1,999}?\|\d{1,9})

\ban ASCII word boundary

Positive Lookahead(?=\|?\1\b)

\|?optionally matches the literal | (124₁₀ / 174₈ / 7C₁₆)

\1the text saved by group 1

\ban ASCII word boundary

.{1,999}?any character (except for line terminators), repeated between 1 and 999 times

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

\d{1,9}a digit, repeated between 1 and 9 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.

Search reference

Regular Expression

\|(\d+)\b(?<=\b(?=\|?\1\b).{1,999}?\|\d{1,9})

New

0612|0613|061|0612|0612
0211|0612|021|0212|0211|0211
0111|0111
0511|0512|0511|0511|0521|0512|0511