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 / ... /...