Regular Expressions 101

Group 1(([0-9]* ??\(*([a-z]+[₀-₉]*)+\)*[₀-₉]*))

Group 2([0-9]* ??\(*([a-z]+[₀-₉]*)+\)*[₀-₉]*)

Character Class[0-9]*

*matches any number of characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

??optionally matches the literal (32₁₀ / 40₈ / 20₁₆)

\(*the literal ( (40₁₀ / 50₈ / 28₁₆) , repeated any number of times

Group 3([a-z]+[₀-₉]*)+

+repeats the group contents below at least once:

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case insensitive)

Character Class[₀-₉]*

*matches any number of characters from the set below:

₀-₉one character from ₀ (8320₁₀) to ₉ (8329₁₀)

\)*the literal ) (41₁₀ / 51₈ / 29₁₆) , repeated any number of times

Character Class[₀-₉]*

*matches any number of characters from the set below:

₀-₉one character from ₀ (8320₁₀) to ₉ (8329₁₀)

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

g modifier: global. Finds all matches instead of stopping after the first

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Search reference

Regular Expression

(([0-9]* ??\(*([a-z]+[₀-₉]*)+\)*[₀-₉]*))

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