Regular Expressions 101

Pro

1st Alternative\[NUM]\s*(?:hour|minute|time)s?\b

\[the literal [ (91₁₀ / 133₈ / 5B₁₆)

NUM]the literal text NUM] (case sensitive)

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

Non-Capturing Group(?:hour|minute|time)

1st Alternativehour

hourthe literal text hour (case sensitive)

2nd Alternativeminute

minutethe literal text minute (case sensitive)

3rd Alternativetime

timethe literal text time (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

\ba Unicode word boundary

2nd Alternative!

!the literal ! (33₁₀ / 41₈ / 21₁₆)

3rd Alternative\?{2}

\?{2}the literal ? (63₁₀ / 77₈ / 3F₁₆) , repeated exactly 2 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

\[NUM]\s*(?:hour|minute|time)s?\b|!|\?{2}

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