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1 point by Beta_one 95 days ago | web | 1 comment





CHARACTER CLASSES \c = control character \s = white space \S = non white space \d = digit \D = not digit \w = word \W = not word \xhh =hexadecimal character hh \Oxxx = octal character xxx QUANTIFIERS * = 0 or more + = 1 or more ? = 1 or 0 {3} = exactly 3 {3,} = 3 or more {3,5} = 3, 4 or 5