On Thu, Mar 12, 2009 at 01:27, Chap Harrison <[email protected]> wrote:
> On Mar 11, 2009, at 11:51 PM, Chas. Owens wrote:
>
>> Dereference the hashref as an arrayref then ask for the keys:
>>
>> #!/usr/bin/perl
>>
>> use strict;
>> use warnings;
>>
>> my %hash = ( adams => {} );
>>
>> my @keys = qw/a ar af aw/;
>> my @values = (1, 19, 13, 11);
>>
>> @{$hash{adams...@keys} = @values;
>>
>> use Data::Dumper;
>>
>> print Dumper \%hash;
>
>
> Thank you for both a solution and several other useful tips as well!
>
> It's still not intuitive to me why we FIRST "convert" the hash to an array,
> and THEN ask for keys - keys being hash-ish, rather than array-ish sorts of
> things. (I've said that badly.) What exactly are the elements of the array
> @{$hash{adams...@keys} ?
snip
It isn't really becoming an array. A better way to think of it is
that $ means we expect one value back from the data structure:
my $scalar = $array[0];
my $scalar = $hash{foo};
and @ means we expect to get many values back from the data structure
my @result = @array[0 .. 5];
my @result = @hash{qw/foo bar baz/};
of course, you have to look at the context to determine what happens:
my $length = @array;
--
Chas. Owens
wonkden.net
The most important skill a programmer can have is the ability to read.
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