Regular Expressions 101

Group 1(\d\W+)

\da Unicode decimal digit

\W+any character that is not a Unicode word character, repeated at least once

Group 2(h\.?s\.?\s+)?

?repeats the group contents below at most once:

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

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

\s+a Unicode whitespace character, repeated at least once

athe literal a (97₁₀ / 141₈ / 61₁₆) (case sensitive)

\s+a Unicode whitespace character, repeated at least once

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

\ba Unicode word boundary

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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Search reference

Regular Expression

(\d\W+)(h\.?s\.?\s+)?a\s+m\b

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