>>>>> "BR" == Bob Rogers <[EMAIL PROTECTED]> writes:
BR> I would like to point out that your code can be improved by replacing BR> uses of $& and $` with parentheses in the regexes followed by $1 and BR> $2. This is from the Devel::SawAmpersand doc . . . BR> I was unaware of this issue; thanks for bringing it to my attention. BR> But Devel::SawAmpersand doesn't really explain the problem in any kind BR> of depth, and just talks about "massive in-memory copying." So, BR> presumably, this is just a question of efficiency? the problem only happens with s///. if you use $&, then all uses of s/// must do a full copy of the original string in case parts of it are referred to by $& (and friends). the s/// could change the string and so a copy must be made. this is true for all instances of s/// in your program. if you use parens then only those instances will need extra copies. so $& is a waste if you don't use grabbing. uri -- Uri Guttman ------ [EMAIL PROTECTED] -------- http://www.stemsystems.com ----- Stem and Perl Development, Systems Architecture, Design and Coding ---- Search or Offer Perl Jobs ---------------------------- http://jobs.perl.org Damian Conway Perl Classes - January 2003 -- http://www.stemsystems.com/class _______________________________________________ Boston-pm mailing list [EMAIL PROTECTED] http://mail.pm.org/mailman/listinfo/boston-pm
