Regular Expressions 101

Pro

Group 1(\d+(?:,\d+)?\s*l/\d+km)

\d+a Unicode decimal digit, repeated at least once

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

?repeats the group contents below at most once:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\d+a Unicode decimal digit, repeated at least once

\s*a Unicode whitespace character, repeated any number of times

l/the literal text l/ (case sensitive)

\d+a Unicode decimal digit, repeated at least once

kmthe literal text km (case sensitive)

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

Group 2(\d+\s?g\s*CO[₂2]/km)

\d+a Unicode decimal digit, repeated at least once

\s?optionally matches a Unicode whitespace character

gthe literal g (103₁₀ / 147₈ / 67₁₆) (case sensitive)

\s*a Unicode whitespace character, repeated any number of times

COthe literal text CO (case sensitive)

Character Class[₂2]

₂the literal ₂ (8322₁₀ / 20202₈ / 2082₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

/kmthe literal text /km (case sensitive)

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

(\d+(?:,\d+)?\s*l/\d+km).*?(\d+\s?g\s*CO[₂2]/km)

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