Regular Expressions 101

Pro

(?m)applies the following effective flags to the remainder of the pattern: gm

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Negative Lookbehind(?<!])

]the literal ] (93₁₀ / 135₈ / 5D₁₆)

Group 1((#(?!#)(.*?)#(?!#))|(##(?!#)(.*?)##))

1st Alternative(#(?!#)(.*?)#(?!#))

Group 2(#(?!#)(.*?)#(?!#))

#the literal # (35₁₀ / 43₈ / 23₁₆)

Negative Lookahead(?!#)

#the literal # (35₁₀ / 43₈ / 23₁₆)

Group 3(.*?)

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

#the literal # (35₁₀ / 43₈ / 23₁₆)

Negative Lookahead(?!#)

#the literal # (35₁₀ / 43₈ / 23₁₆)

2nd Alternative(##(?!#)(.*?)##)

Group 4(##(?!#)(.*?)##)

##the literal text ##

Negative Lookahead(?!#)

#the literal # (35₁₀ / 43₈ / 23₁₆)

Group 5(.*?)

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

##the literal text ##

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.

27 tokens

Regular Expression

(?m)(?<!])((#(?!#)(.*?)#(?!#))|(##(?!#)(.*?)##))

New

The text [.underline]#underline me# is underlined. +
The text [.line-through]#aaa# ist durchgestrichen.

text #just highlight#, normal tex#t#fg#f#gfg 

#ffsfsdf fdsfsd#

TODO: wrong marking

The *[red]##c##[green]##o##[purple]##l##[fuchsia]##o##[blue]##r##* brings contrast to the text, making it easier to read.

Extraction

The text [.underline]#underline me# is underlined. +
The text [.line-through]#aaa# ist durchgestrichen.

text #just highlight#, normal tex#t#fg#f#gfg 

#ffsfsdf fdsfsd#

TODO: wrong marking

The *[red]##c##[green]##o##[purple]##l##[fuchsia]##o##[blue]##r##* brings contrast to the text, making it easier to read.