Regular Expressions 101

Pro

Group 1((?P<Days>\d{0,2})d\s*)?

?repeats the group contents below at most once:

Group Days(?P<Days>\d{0,2})

\d{0,2}a digit, repeated between 0 and 2 times

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

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

Group 3((?P<Hours>\d{0,2})h\s*)?

?repeats the group contents below at most once:

Group Hours(?P<Hours>\d{0,2})

\d{0,2}a digit, repeated between 0 and 2 times

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

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

Group 5((?P<Mins>\d{0,2})m)?

?repeats the group contents below at most once:

Group Mins(?P<Mins>\d{0,2})

\d{0,2}a digit, repeated between 0 and 2 times

mthe literal m (109₁₀ / 155₈ / 6D₁₆) (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

((?P<Days>\d{0,2})d\s*)?((?P<Hours>\d{0,2})h\s*)?((?P<Mins>\d{0,2})m)?

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