Re: Fast Way to Return Unique Array of Array


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Re: Fast Way to Return Unique Array of Array

by pg (Canon)

on Sep 05, 2005 at 07:16 UTC ( [id://489160]=note: print w/replies, xml )

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in reply to Fast Way to Return Unique Array of Array

Slightly modify the original uniq(), it works:

use Data::Dumper;
my @AoA = (['a','b','c'],
           ['a','b','c'],
           ['a','b','d'],
           ['a','b','d']);

my @uAoA = uniq(@AoA);
print Dumper \@uAoA;

sub uniq () {
    my %h;
    map { $h{join($;, @$_)}++ == 0 ? $_ : () } @_;
}
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Comment on Re: Fast Way to Return Unique Array of Array Download Code

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Re^2: Fast Way to Return Unique Array of Array by calin (Deacon) on Sep 05, 2005 at 10:17 UTC
Nice, just a slight style improvement: `map { $h{join($;, @$_)}++ == 0 ? $_ : () } @_;` [download] becomes `grep { ! $h{join($;, @$_)}++ } @_;` [download]	[reply] [d/l] [select]
Re^3: Fast Way to Return Unique Array of Array by pseudomonas (Monk) on Sep 05, 2005 at 12:19 UTC
Could one replace `join($;, @$_)` with `Dumper($_)` (or some variant thereof), to allow for multiple levels of data structure?	[reply] [d/l] [select]

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