Regular Expressions 101

Explanation

Pro

Positive Lookbehind(?<=\/\/:)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

Character Class[\r\n]*

*matches any number of characters from the set below:

\ra carriage return (ASCII 13)

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

Group 1(.*?)

.*?any character, repeated any number of times

Positive Lookahead(?=[\r\n]*\/\/\~[\r\n]*\*)

Character Class[\r\n]*

*matches any number of characters from the set below:

\ra carriage return (ASCII 13)

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

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

\~the literal ~ (126₁₀ / 176₈ / 7E₁₆)

Character Class[\r\n]*

*matches any number of characters from the set below:

\ra carriage return (ASCII 13)

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

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Global pattern flags

s modifier: single line. Allows a dot to match line terminators

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

Detailed match information will be displayed here automatically.

25 tokens

(?<=\/\/:)[\r\n]*(.*?)(?=[\r\n]*\/\/\~[\r\n]*\*)

New

*Listing 1.
//:
some code
//~
*
*Listing 2.
//:
some new code
//~
*