Regular Expressions 101

Pro

^start of line

Group 1([\w]+(?=,))?

?repeats the group contents below at most once:

Character Class[\w]+

+matches at least one character from the set below:

\wany word character

Positive Lookahead(?=,)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Non-Capturing Group(?:.*\b(\w+).+\b\w+)?

?repeats the group contents below at most once:

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

\ban ASCII word boundary

Group 2(\w+)

\w+any word character, repeated at least once

.+any character (except for line terminators), repeated at least once

\ban ASCII word boundary

\w+any word character, repeated at least once

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

^([\w]+(?=,))?(?:.*\b(\w+).+\b\w+)?

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