Regular Expressions 101

Pro

1st Alternative (?:\([^()]*) # Match '( ....' (?:\d+,\ ){2,} # Our regex in '( ..... )' (?:[^()]*\)) # Match '..... )' (*SKIP)(*FAIL) # Fail the first alternative

Non-Capturing Group(?:\([^()]*)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^()]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

Comment: Match '( ....'

Non-Capturing Group(?:\d+,\ ){2,}

{2,}repeats the group contents below at least 2 times:

\d+a digit, repeated at least once

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\ the literal (32₁₀ / 40₈ / 20₁₆)

Comment: Our regex in '( ..... )'

Non-Capturing Group(?:[^()]*\))

Negated Character Class[^()]*

*matches any number of characters outside the set below:

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Comment: Match '..... )'

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*FAIL)forces the current match attempt to fail at this position

Comment: Fail the first alternative

2nd Alternative # Second alternative (?:\d+,\ ){2,} # Our regex not enclosed in '( ... )'

Comment: Second alternative

Non-Capturing Group(?:\d+,\ ){2,}

{2,}repeats the group contents below at least 2 times:

\d+a digit, repeated at least once

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\ the literal (32₁₀ / 40₈ / 20₁₆)

Comment: Our regex not enclosed in '( ... )'

Global pattern flags

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

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

No unit tests · Add a test to get started

25 tokens

Regular Expression

    (?:\([^()]*)        # Match '( ....'
    (?:\d+,\ ){2,}      # Our regex in '( ..... )'
    (?:[^()]*\))        # Match  '..... )'
    (*SKIP)(*FAIL)      # Fail the first alternative
|                       # Second alternative
    (?:\d+,\ ){2,}      # Our regex not enclosed in '( ... )'

Unit Tests

There are no unit tests, click to add some.