Regular Expressions 101

Pro

^start of string

Group 1(\\?\w+(?:\\{1}\w+)+)

\\?optionally matches the literal \ (92₁₀ / 134₈ / 5C₁₆)

\w+any word character, repeated at least once

Non-Capturing Group(?:\\{1}\w+)+

+repeats the group contents below at least once:

\\{1}the literal \ (92₁₀ / 134₈ / 5C₁₆) , repeated exactly 1 time

\w+any word character, repeated at least once

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Group 2(\w*+)

\w*+any word character, repeated any number of times

Group 3(#.*)?

?repeats the group contents below at most once:

#the literal # (35₁₀ / 43₈ / 23₁₆)

.*any character (except for line terminators), repeated any number of times

Group 4() — does not consume characters

$end of string

Global pattern flags

D modifier: Dollar. Forces $ to match only at the end of the string instead of also before a final line terminator. This option is ignored if the m-flag is set

Ready to run

25 tokens

Regular Expression

^(\\?\w+(?:\\{1}\w+)+):(\w*+)(#.*)?()$

Regular Expression

Unit Tests