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...or at least in Perl 5.

As pointed out in Apocolypse 2 (where's the danged thing on or Exegensis 2, perl 6 will have much better prototyping featurs, such that you can have something like:

# PERL 6!!!! @array1 = ( 1..5 ); @array2 = ( 6..10 ); do_array_magic( @array1, @array2 ); #... #... sub do_array_magic ( ARRAY $a, ARRAY $b ) { # @a is [ 1,2,3,4,5] # @b is [ 6,7,8,9,10 ] }
instead of
# PERL 5 @array1 = ( 1..5 ); @array2 = ( 6..10 ); do_array_magic( @array1, @array2 ); #... #... sub do_array_magic { (@a, @b) = @_; # @a is [1..10] # @b is empty. }

But prototyping in p5 is mearly a pain, and even if you do check the args by prototype, you still probably need a block of warn or die statements as you check arguments for validity at the start of the sub. So they mearly get in the way instead of being useful currently.

Dr. Michael K. Neylon - || "You've left the lens cap of your mind on again, Pinky" - The Brain
"I can see my house from here!"
It's not what you know, but knowing how to find it if you don't know that's important

In reply to Re: Re (tilly) 1: When to use Prototypes? by Masem
in thread When to use Prototypes? by demerphq

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