If you aren't afraid of a few counters you could do something like this: 
my $replace = 0;

for ( my $x = 0; $x< @array; $x++ ) {
    if ( # pass of your condition ) {
        $array[$replace] = $array[$x];
        $replace++;
    }
}

[download]
This will effectively 'shift' every thing over to the front of your array, avoiding double memory issues, and all you have to do is one final pass to "cleanup" the invalid entries at the end (pop @array until the length == $replace).

In reply to Re: Efficient array element deletion by fert
in thread Efficient array element deletion by kennethk

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