I would initially put a mapping from @b to @a into a translation mapping hash:

    my %b_a_map = map { (split / /)[0] => $_ } @a;

And then generating @c becomes a simple O(n) loop:

     my @c = map { $b_a_map{$_} } @b;

@c will now look something like:

apple 2
apple 2
apple 2
orange 5
orange 5
pear 3

[download]

Edit: Output re-run with verbatim OP input, instead of my slightly modified test input.

use strict; use warnings; omitted for brevity.

In reply to Re: mix arrays by rjt
in thread mix arrays by hulketa

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