Regular Expressions 101

Pro

Character Class[a-zA-Z\d]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\da Unicode decimal digit

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

\w+a Unicode word character, repeated at least once

Non-Capturing Group(?:\.(?:py|mat))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:py|mat)

1st Alternativepy

pythe literal text py (case sensitive)

2nd Alternativemat

matthe literal text mat (case sensitive)

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

[a-zA-Z\d]+_\w+(?:\.(?:py|mat))?

New

Some text here: * my_file_stuff.mat * other_file * third_file *
|my_file|another_file.mat|O_HERES_ONE|_O_HERES_ANOTHER| | | |