Example: http://mustache.github.io/ -> https://github.com/pvande/Template-Mustache (Perl)

Mustache_ex.pl

#!/usr/bin/env perl
use strict;
use warnings;

use Template::Mustache;

# https://github.com/pvande/Template-Mustache/blob/master/t/read_data_from_hashes.t
print Template::Mustache->render(
    <DATA>,
    {
        1 => 'a, b',
        sub => {
            2 => 'c',
            3 => 'd',
        },
        4 => 'e, f',
    }
);

# https://github.com/pvande/Template-Mustache/blob/master/t/read_partials_from_partial_method.t
print Template::Mustache->render(
    '[ {{> list1}}, {{> list2}} ]',
    {},
    sub {
        return 'a, b, c' if $_[0] eq 'list1';
        return 'd, e, f' if $_[0] eq 'list2';
    }
);

__DATA__
[ {{1}}, {{#sub}}{{2}}, {{3}}{{/sub}}, {{4}} ]