my @array;
getreallyhugelist( \@array );
my @idxsToRemove= getnotashugelist();
my %toRemoveIdx;
@toRemoveIdx{@idxsToRemove}= (1)x@idxsToRemove;
@array= map { $toRemoveIdx{$_} ? () : $array[$_] } 0..$#array;

[download]

That last line copies the whole array once (puts it on the stack) and then only has to shift each non-removed element once. So it will probably be faster than repeated calls to splice() (each one having to shift the whole end of the array). I think this speed-up will more than compensate for the cost of building the hash (on the preceding line) if you are removing more than a few elements.

        - tye (but my friends call me "Tye")

In reply to Re: Removing certain elements from an array by tye
in thread Removing certain elements from an array by Anonymous Monk

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