Regular expressions

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Updated: 09 October 2022

Quantifiers

  • ?, ?? – 0 or 1 occurences (?? is lazy, ? is greedy)
  • *, *? – any number of occurences
  • +, +? – at least one occurence
  • {n} – exactly n occurences
  • {n,m} – n to m occurences, inclusive
  • {n,m}? – n to m occurences, lazy
  • {n,}, {n,}? – at least n occurence