See below.
Beau E. Cox wrote:
> Hi -
>
>> From: R. Joseph Newton [mailto:[EMAIL PROTECTED]]
>> Subject: Re: Removing duplicates from an array
>>
>> Troy May wrote:
>>
>>> Hello,
>>>
>>> What's the best and cleanest way to remove duplicates from an array? I
>>> have an array that reads entries from a text file and I would like to
>>> remove all the duplicates from it.
>>>
>>> Thanks in advance!
>>>
>>> Troy
>>
>> I'd say prevention is the best cure. Check for duplicates as you read.
>>
>
> Yes prevention is prob the best way.
> But if you must remove dups anyway:
>
> ...@array_with_dups in the input array...
> my %temp_hash;
> $temp_hash{$_} = 1 for (@array_with_dups);
> my $array_without_dups = ();
> push @array_without_dups, $_ for (keys %temp_hash);
>
> The downside is that thr array order will be messed up...
> You can sort it: ... for (sort keys ...
Or, if you want to preserve ordering, you could handle it as you read the
file.
my %temp_hash;
my $array_without_dups = ();
while (<file>) {
chomp;
if ($temp_hash{$_} == 0) {
$temp_hash{$_} = 1;
push(@array_without_dups, $_);
}
}
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