Regular Expressions 101

Non-Capturing Group(?:4,?){2,3}

{2,3}repeats the group contents below between 2 and 3 times:

4the literal 4 (52₁₀ / 64₈ / 34₁₆)

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

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

(?:4,?){2,3}

New

1,4,3,2,1,1,4,4,3,2,1,4,4,3,2,1,4,4,4,3,2,