On Wednesday 01 May 2002 2:26 pm, Bob Showalter wrote:
[snip]
> > {$array{$_}++} foreach @array;
>
> They are the same as far as the effect on %array. But you
> shouldn't use map() in a void context, as it constructs a
> result list which is then thrown away. So your iterative
> approach is better.
>
> Better still IMO is:
>
> { my %seen; @array = grep { !$seen{$_}++ } @array; }
So, this foreach's @array, passing $_ through grep, which looks to see if
it's contained in %seen, returning $_ if it isn't - i.e. on first seeing $_.
it performs the actions $seen{$_}++ in the process.
right?
--
Gary Stainburn
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