Hey fellow monks, here's an easy problem, but I'm looking for an elegant solution, high in readability, low in use of additional modules.

How to insert a new element right after a given element in an array?

    my @arr = qw(a b c d c e f);
    insert_after_first(\@arr, "c", "x");
[download]

should result in @arr containing

    a b c x d c e f
[download]

Note that it shouldn't be touching duplicate entries (like the second "c"). An obvious solution would be

    sub insert_after_first {
        my($arr, $element, $insert) = @_;

        for(my $idx=0; $idx < @$arr; $idx++) {
            if($arr->[$idx] eq $element) {
                splice @$arr, $idx+1, 0, $insert;
                return @$arr;
            }
        }
    }
[download]

but that's nowhere as perlish or short as I'd like it to be.

Who's up for the challenge?

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