Mega Code Archive

 

Categories / Perl / Regular Expression

 

Posix and Unicode Classes

Shortcut              Expansion                                       Description [[:alpha:]]           [a-zA-Z]                                        An alphabetic character. [[:alnum:]]           [0-9A-Za-z]                                     An alphabetic or numeric character. [[:digit:]]           \d                                              A digit, 0-9. [[:lower:]]           [a-z]                                           A lower case letter. [[:upper:]]           [A-Z]                                           An upper case letter. [[:punct:]]           [!"#$%&'()*+,-./:;<=>?@\[\\\]^_`{|}~]           A punctuation character â€“ note the escaped characters [, \, and ]. /bea?t/ Matches either 'beat' or 'bet' /bea+t/ Matches 'beat', 'beaat', 'beaaat'… /bea*t/ Matches 'bet', 'beat', 'beaat'…