Regular Expressions 101

Explanation

Pro

(?x)applies the following effective flags to the remainder of the pattern: gmx

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Comment: ignore les espaces et permet donc l'indentation

Definition Group(?(DEFINE) (?<string> ".*?" ) (?<number> \d+ ) (?<value> \s* (?: (?&string) | (?&number) | (?&list) ) \s* ) (?<list> \[ (?&value) (?: , (?&value) )* \] ) )

Group string(?<string> ".*?" )

"the literal text "

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

" the literal text "

Group number(?<number> \d+ )

\d+a digit, repeated at least once

Group value(?<value> \s* (?: (?&string) | (?&number) | (?&list) ) \s* )

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

Non-Capturing Group(?: (?&string) | (?&number) | (?&list) )

1st Alternative (?&string)

(?&string)calls group string as a subroutine

2nd Alternative (?&number)

(?&number)calls group number as a subroutine

3rd Alternative (?&list)

(?&list)calls group list as a subroutine

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

Group list(?<list> \[ (?&value) (?: , (?&value) )* \] )

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

(?&value)calls group value as a subroutine

Non-Capturing Group(?: , (?&value) )*

*repeats the group contents below any number of times:

, the literal text ,

(?&value)calls group value as a subroutine

\]the literal ] (93₁₀ / 135₈ / 5D₁₆)

^start of line

(?&value)calls group value as a subroutine

$end of line

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?x) # ignore les espaces et permet donc l'indentation
(?(DEFINE)
  (?<string> ".*?" )
  (?<number> \d+ )
  (?<value>
    \s* (?:
        (?&string)
      | (?&number)
      | (?&list)
   ) \s*
  )
  (?<list> \[ (?&value) (?: , (?&value) )* \] )
)
^(?&value)$

[42, "abc", ["foo", "bar"], 10]

Extraction

[42, "abc", ["foo", "bar"], 10]