In Perl, how can I find the index of a given value in an array?

Question

$VAR1 = [
          \'830974\',
          \'722065\',
          \'722046\',
          \'716963\'
        ];

How can I calculate the array index for

Answer 1

Here is how you would find all the positions at which a given value appears:

#!/usr/bin/perl

use strict;
use warnings;

my @x = ( 1, 2, 3, 3, 2, 1, 1, 2, 3, 3, 2, 1 );
my @i = grep { $x[$_] == 3 } 0 .. $#x;
print "@i\n";

If you only need the first index, you should use List::MoreUtils::first_index.