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Regular Expressions
Pattern Matching by Example

  • Here are several examples which demonstrate typical usage patterns for regular expression matching

  • Skip over comment lines 
      while ( $line = <STDIN> ) {
	next if ( $line =~ /^#/ );
	...
}
  • End a loop 
      if ( $line =~ /[aeiou]/i ) {
	# Vowel
} else {
	# Consonant
}
  • Notice the i at the end of the expression?
    There are several options you can use with / ... /...