Re: underscore prototype imposing scalar context

Does this help?

sub x(@;_) { print @_ ? @_ : $_ };;

$_ = 'fred'; x();;
fred

$_ = 'fred'; x( 1 .. 5 );;
1 2 3 4 5

$_ = 'fred'; x( 1 );;
1
[download]

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

The start of some sanity?

Comment on Re: underscore prototype imposing scalar context Download Code

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Re^2: underscore prototype imposing scalar context by Aaronrp (Scribe) on Mar 10, 2012 at 20:21 UTC
No, that doesn't work. The unbackslashed @ eats up all the prototype characters behind it. This: `#!/ActivePerl/bin/perl use 5.014; use warnings; sub sayit (@;_); sayit (1, 2, 3); my @list = (4, 5, 6); sayit (@list); local $_ = 7; sayit; my $_ = 8; sayit; sub sayit (@;_) { my @list = @_; if (@list) { say "@list" } else { say "no list" } }` [download] yields this: `Prototype after '@' for main::sayit : @;_ at q.pl line 6. Prototype after '@' for main::sayit : @;_ at q.pl line 21. 1 2 3 4 5 6 no list no list` [download] The first two lines are due to the warnings pragma.	[reply] [d/l] [select]

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Re^2: underscore prototype imposing scalar context
by Aaronrp (Scribe) on Mar 10, 2012 at 20:21 UTC

No, that doesn't work. The unbackslashed @ eats up all the prototype characters behind it.

This:

#!/ActivePerl/bin/perl

use 5.014;
use warnings;

sub sayit (@;_);

sayit (1, 2, 3);

my @list = (4, 5, 6);
sayit (@list);

local $_ = 7;

sayit;

my $_ = 8;

sayit;

sub sayit (@;_) {

   my @list = @_;

   if (@list) { say "@list" } else { say "no list" }

}
[download]

yields this:

Prototype after '@' for main::sayit : @;_ at q.pl line 6.
Prototype after '@' for main::sayit : @;_ at q.pl line 21.
1 2 3
4 5 6
no list
no list
[download]

The first two lines are due to the warnings pragma.

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