Dear Monks,

I have created an entity, which applies the elements to another entity, but the incantation follows the path of the black arts. I have to call upon another Perl Daemon to grant it life. Please show me my wrongs.

For the less spiritual enlighted:
It is a function, which applies the elements of an array to another function. Like the javascript apply. Here it is: 

sub repeat {
        my $n = shift;
        my $x = shift;
        my $array = [];
        for($i = 0; $i < $n; $i++){
                push @{$array}, $x;
        }
        return $array;
}


sub apply {
        my ($func, $args) = @_;
        my $size = @{$args};
        my $app = repeat($size, '(shift @{$x})');
        eval 'sub _apply { my $f = shift; my $x = shift; $f->(' . join
+(',', @{$app}) . '); }';
        return _apply(\&$func, $args);
}

[download]

It does its job, but I have understood, that when I call eval another perl interpreter will be started. This is of course not very efficient. Is there a better way to get around this?

I thought about generating a couple of static functions like apply1 apply2 apply3 etc and put it in a package. But I find this offending too.

Example:

sub test {
        my $x = shift;
        my $y = shift;
        my $z = shift;
        print $x + $y + $z;
}
# output 6
apply(\&test, [1,2,3]);

[download]

Thanks for your help!

In reply to Applying an array to a function by eklerks

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