Regular Expressions 101

Pro

^start of line

Group 1((release)/v[0-9]+(\.[0-9]+)?|(develop|master))

1st Alternative(release)/v[0-9]+(\.[0-9]+)?

Group 2(release)

releasethe literal text release (case sensitive)

/vthe literal text /v (case sensitive)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 3(\.[0-9]+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

2nd Alternative(develop|master)

Group 4(develop|master)

1st Alternativedevelop

developthe literal text develop (case sensitive)

2nd Alternativemaster

masterthe literal text master (case sensitive)

$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

Detailed match information will be displayed here automatically.

25 tokens

^((release)/v[0-9]+(\.[0-9]+)?|(develop|master))$

New

release/v1.1
release/v1
master
develop