Regular Expressions 101

Pro

Non-Capturing Group(?:\s*#.*\n)*

*repeats the group contents below any number of times:

\s*any whitespace character, repeated any number of times

#the literal # (35₁₀ / 43₈ / 23₁₆)

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

\na line-feed (newline) character (ASCII 10)

Group 1(\w+)

\w+any word character, repeated at least once

\s*any whitespace character, repeated any number of times

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\s*any whitespace character, repeated any number of times

Group 2((?:[^#=\n]+(?:\n|$))+)

Non-Capturing Group(?:[^#=\n]+(?:\n|$))+

+repeats the group contents below at least once:

Negated Character Class[^#=\n]+

+matches at least one character outside the set below:

#the literal # (35₁₀ / 43₈ / 23₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\na line-feed (newline) character (ASCII 10)

Non-Capturing Group(?:\n|$)

1st Alternative\n

\na line-feed (newline) character (ASCII 10)

2nd Alternative$

$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

(?:\s*#.*\n)*(\w+)\s*=\s*((?:[^#=\n]+(?:\n|$))+)

New

tag = value
tag2 = value2
value continuation2
# comment for tag3
tag3 = value3

tag = value
tag2 = value2
value continuation2
# comment for tag3
tag3 = value3