Regular Expressions 101

Explanation
Pro

^start of string

Group is_hidden(?<is_hidden>\.?)

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

Non-Capturing Group(?:(?<timestamp>\d+)\-)?

?repeats the group contents below at most once:

Group timestamp(?<timestamp>\d+)

\d+a digit, repeated at least once

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group name(?<name>[\w\x27\s]+\-?)+

+repeats the group contents below at least once:

Character Class[\w\x27\s]+

+matches at least one character from the set below:

\wany word character

\x27the literal ' (27₁₆ / 47₈ / 39₁₀)

\sany whitespace character

\-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

\-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group content_removed_version(?<content_removed_version>\d+(?:$\w+$)?)

\d+a digit, repeated at least once

Non-Capturing Group(?:$\w+$)?

?repeats the group contents below at most once:

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\w+any word character, repeated at least once

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Group extensions(?<extensions>[\.[[:alpha:]]+\.?)*

*repeats the group contents below any number of times:

Character Class[\.[[:alpha:]]+

+matches at least one character from the set below:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

[the literal [ (91₁₀ / 133₈ / 5B₁₆)

[:alpha:]an alphabetic character [a-zA-Z]

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

$end of string, or before its final line terminator

Global pattern flags

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

Detailed match information will be displayed here automatically.

25 tokens

^(?<is_hidden>\.?)(?:(?<timestamp>\d+)\-)?(?<name>[\w\x27\s]+\-?)+\-(?<content_removed_version>\d+(?:\(\w+\))?)(?<extensions>[\.[[:alpha:]]+\.?)*$

New

2023-make_test-00.make