Regular Expressions 101

1st Alternative(\d+)\s\(\s(\d+)\s\)

Group 1(\d+)

\d+a digit, repeated at least once

\sany whitespace character

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\sany whitespace character

Group 2(\d+)

\d+a digit, repeated at least once

\sany whitespace character

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative(\d+)(?=\s\(\s(?:\d+\s\(\s\d+\s\)\s)+(\d+))

Group 3(\d+)

\d+a digit, repeated at least once

Positive Lookahead(?=\s\(\s(?:\d+\s\(\s\d+\s\)\s)+(\d+))

\sany whitespace character

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\sany whitespace character

Non-Capturing Group(?:\d+\s\(\s\d+\s\)\s)+

+repeats the group contents below at least once:

\d+a digit, repeated at least once

\sany whitespace character

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\sany whitespace character

\d+a digit, repeated at least once

\sany whitespace character

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\sany whitespace character

Group 4(\d+)

\d+a digit, repeated at least once

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

(\d+)\s\(\s(\d+)\s\)|(\d+)(?=\s\(\s(?:\d+\s\(\s\d+\s\)\s)+(\d+))

New

3 ( 16 ) 23 ( 24 ( 40 ) 50 ( 66 ) 76 ) 83 ( 88 ( 104 ) 127 )