Regular Expressions 101

<!--BEGIN DELIMITERthe literal text <!--BEGIN DELIMITER (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group expr(?<expr>(\w+))

Group 2(\w+)

\w+any word character, repeated at least once

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

-->the literal text -->

Group content(?<content>([\s\S]*?))

Group 4([\s\S]*?)

Character Class[\s\S]*?

*?matches any number of characters from the set below:

\sany whitespace character

\Sany non-whitespace character

<!--END DELIMITERthe literal text <!--END DELIMITER (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group 5(\k<expr>.*)

\k<expr>the text saved by group expr

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

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

-->the literal text -->

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

<!--BEGIN DELIMITER\((?<expr>(\w+))\)-->(?<content>([\s\S]*?))<!--END DELIMITER\((\k<expr>.*)\)-->

New

    <!--BEGIN DELIMITER(A)-->
        sample text
        <!--BEGIN DELIMITER(B)-->
            another sample text
        <!--END DELIMITER(B)-->
    <!--END DELIMITER(A)-->

Regular Expression

Extraction