Something like this? 

#! /usr/bin/perl -l
use strict;
use warnings;

use List::MoreUtils qw(natatime);

sub unzip(&$@)
{
    my $c = shift;
    my $n = shift;
    my $it = natatime $n, @_;
    my @rc;
    while (my @vals = $it->())
    {
        push @rc, $c->(@vals)
    }
    @rc;
}

use Data::Dumper;
my %h = qw(k1 v1 k2 v2);

print Dumper [ unzip {[$_[0],$_[1]]} 2, @{[%h]} ];

[download]
Though, I have to admit, your syntax is a bit weird. Most of these would use $_, not @_. This would lead to code like this: 
#! /usr/bin/perl -l
use strict;
use warnings;

use List::MoreUtils qw(natatime);

sub unzip(&$@)
{
    my $c = shift;
    my $n = shift;
    my $it = natatime $n, @_;
    my @rc;
    while (my @vals = $it->())
    {
        local $_ = \@vals;
        push @rc, $c->()
    }
    @rc;
}

use Data::Dumper;
my %h = qw(k1 v1 k2 v2);

print Dumper [ unzip {[$_->[0],$_->[1]]} 2, @{[%h]} ];

[download]
and I'm not entirely convinced that's better. Either way, of course, we need prototypes to get away without the "sub" keyword, and that necessitates the ugliness in passing in %h. If we got rid of the prototype, we'd have to add sub, and then we could just pass in %h: 
#! /usr/bin/perl -l
use strict;
use warnings;

use List::MoreUtils qw(natatime);

sub unzip
{
    my $c = shift;
    my $n = shift;
    my $it = natatime $n, @_;
    my @rc;
    while (my @vals = $it->())
    {
        local $_ = \@vals;
        push @rc, $c->()
    }
    @rc;
}

use Data::Dumper;
my %h = qw(k1 v1 k2 v2);

print Dumper [ unzip sub {[$_->[0],$_->[1]]}, 2, %h ];

[download]
All of these return the same thing, with slightly different syntaxes.

In reply to Re: functional opposite of zip by Tanktalus
in thread functional opposite of zip by Anonymous Monk

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