Regular Expressions 101

^start of line

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

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:prefix)?

?repeats the group contents below at most once:

prefixthe literal text prefix (case sensitive)

Group 1([0-9]{3,})

Character Class[0-9]{3,}

{3,}matches at least 3 characters from the set below:

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

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

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

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25 tokens

Regular Expression

^.*?/(?:prefix)?([0-9]{3,}).*

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