How can I make a Perl hash from an array with the keys and another array with the values?

Question

In Perl, how do I make hash from arrays @A and @B having equal number of elements? The goal is to have each value of @A as key to value in @B. The resulting hash %C would,then make it possible to uniquely identify an element from @B supplying key from @A.

Answer 1

If I understand the problem correctly:

my %c;
$c{$a[$_]} = $b[$_] for (0 .. @a-1);

Answer 2

A's are the keys, B's are the values of hash C:

use strict;
use warnings;

my @a = 1 .. 3;
my @b = 4 .. 6;
my %c;
for (0 .. $#a) {
    $c{$a[$_]} = $b[$_]
}

Keep in mind that there must not be any duplicate values in the A array.

Answer 3

use List::MoreUtils 'mesh';
my %c = mesh @a, @b;

That's how it's made internally (if you're sure about equal number of elements):

my %c = map { $a[$_] => $b[$_] } 0 .. $#a;

Answer 4

it's as simple as

my %c;
@c{@a} = @b;