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IMHO, prototypes are a good thing. People sometimes complain about things like sprintf(@fmt_and_args) not working, but it is very rare to have both the format and arguments in the same array.

Now, let's see a sub where prototypes are very helpful:

sub dmap (&\@@) { my $cl = shift; my $list1 = shift; my $list2 = \@_; my @results; for my $i(0..$#$list1) { local $a = $list1->[$i]; local $b = $list2->[$i]; push @results, &$cl; } return @results; }
So, to do a hyper-add on two lists with that, "dmap { $a + $b } @foo, @bar". Without the prototype, that would have to have been written as the uglier "dmap sub { $a + $b }, \@foo, @bar"

Update: Changed $#list1 to $#$list1. Thanks sauoq.


In reply to Re: Are prototypes evil? by MrNobo1024
in thread Are prototypes evil? by Django

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