in reply to Back to Remedial Perl for Me: map{} function

Question for the monks:

Isn't it true you could do something like this (even though it's probably not in keeping with the intent of map)?

# a way to count the number of elements in a list my $count = 0; my @listOfThings = ('one', 'two', 'three'); map { ++$count } @listOfThings; print "There are $count things in your list of things.\n";

This example completely ignores the fact that the elements in the list are assigned to $_. We could care less what was in those elements. All we want to do is to execute this block once for each element that is in the list.

Replies are listed 'Best First'.
Re: Re: Back to Remedial Perl for Me: map{} function
by merlyn (Sage) on Dec 15, 2000 at 22:00 UTC

      Of course...

      I just wanted to point out that you don't have to really do anything with the elements of @listOfThings if you don't want to; you can do something completely unrelated.

      As an aside, and you may call this trolling (or you may not), I just wanted to see what people would say about this sort of use of map. It's probably a Bad Idea. It would be really interesting to see if somebody could convince me it's a Good Idea. :-)