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pass hash to sub expecting named params?
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Luke Palmer  
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  More options Apr 25 2005, 4:29 am
Newsgroups: perl.perl6.language
From: l...@luqui.org (Luke Palmer)
Date: Mon, 25 Apr 2005 02:29:48 -0600
Local: Mon, Apr 25 2005 4:29 am
Subject: Re: pass hash to sub expecting named params?
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Carl Franks writes:
> Will it be valid to pass a hash to a subroutine expecting named
> params, if the hash keys match the names?

> sub do_this (+$foo, +$bar) {
>   # whatever
> }

> %arg = (
>   :foo,
>   :bar,
> );

> do_this(*%arg);

Yep, and that's exactly how you do it, too.  I believe that the * is
unnecessary (but still acceptable) if you're already in the named zone:

    do_this(foo => 1, %arg);  # ok

Luke


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Carl Franks  
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  More options Apr 25 2005, 4:14 am
Newsgroups: perl.perl6.language
From: fireart...@gmail.com (Carl Franks)
Date: Mon, 25 Apr 2005 09:14:31 +0100
Local: Mon, Apr 25 2005 4:14 am
Subject: pass hash to sub expecting named params?
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Will it be valid to pass a hash to a subroutine expecting named
params, if the hash keys match the names?

sub do_this (+$foo, +$bar) {
  # whatever

}

%arg = (
  :foo,
  :bar,
);

do_this(*%arg);

I use this technique a lot, and it would be unfortunate to miss out on
the advantages of subroutine signatures and have to 'go back' to the
perl5-ish
sub do_this (*%args) { }

Carl Franks


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Carl Franks  
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  More options Apr 25 2005, 4:50 am
Newsgroups: perl.perl6.language
From: fireart...@gmail.com (Carl Franks)
Date: Mon, 25 Apr 2005 09:50:49 +0100
Local: Mon, Apr 25 2005 4:50 am
Subject: Re: pass hash to sub expecting named params?
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That puts my mind at ease!
Many thanks,

Carl

On 4/25/05, Luke Palmer <l...@luqui.org> wrote:


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