Implementing Class and Singleton Methods : Regexps « Development « Ruby

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Ruby » Development » Regexps   Implementing Class and Singleton Methods class Regexp   def Regexp.is_valid?(str)     begin       compile(str)       valid = true     rescue RegexpError       valid = false     end   end end Regexp.is_valid? "The horror!"                     # => true Regexp.is_valid? "The)horror!"                     # => false   Related examples in the same category 1.  Regexps use elements to instruct the regular expression engine on how to find a given string. 2.  An example of a regular expression used to match a string with the String method scan. 3.  Search for a word from the very beginning 4.  Looking for a word 5.  grep(/men/) 6.  grep(/m[ae]n/) 7.  grep(/men|man/) 8.  grep(/m(e|a)n/) 9.  grep(/^When in/) 10.  grep(/outcast state,$/) 11.  grep(/\Aen in/) 12.  grep(/e n,\z/) 13.  grep(/[\(\d\d\d\)]?\d\d\d-\d\d\d\d/) 14.  grep(/colou?r/) 15.  grep(/[\(\d+\)]?\d+-\d+/) 16.  grep(/[\(\d{3}\)]?\d{3}-\d{4}/) 17.  Match a time 18.  Match Perl, zero or more other chars, then Python 19.  Match Perl, a space, and Python 20.  Match Perl, zero or more spaces, and Python 21.  Match Perl, one or more spaces, and Python 22.  Match Perl, whitespace characters, then Python 23.  Match Ruby, a space, and either Perl or Python 24.  Match a regular repression in if statement 25.  sub and gsub replace with regular expressions 26.  Replace Perl or Python with Ruby 27.  The method Regexp#match matches a regular expression against a string. 28.  MatchData-related $-variables are in $~

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