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Re: Is there a regular expression version of the index function?

by rob_au (Abbot)
on Jun 20, 2004 at 12:16 UTC ( #368271=note: print w/replies, xml ) Need Help??


in reply to Is there a regular expression version of the index function?

You can do this using the pos function when performing matching against a string - This function returns the offset of where the last "m//g" search left off for the variable in question ($_ is used when the variable is not specified).

The following code demonstrates this function in action:

#!/opt/bin/perl $str = 'The quick brown fox jumps over the lazy dog.'; while ( $str =~ /[aeiou]/ig ) { printf( "%d %s\n", pos( $str ), substr( $str, pos( $str ) - 1 ) ); substr( $str, 0, pos( $str ), '' ); }

 

perl -le "print unpack'N', pack'B32', '00000000000000000000001011100101'"

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