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Re: Unique array of arrays - how can I do this?

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On Sat, 04 May 2013 04:51:28 -0700, thomas.lehmann.private wrote:

> Hi,
> 
> While calculation I get a solution as an array of integers. There're
> many solutions and I would like to keep them in an array.
> 
> Because of the algorithm there are different paths to get to the same
> solution but I want to have it once only.
> 
> I know that I can use array_unique but that's too slow when called too
> often. I can't wait until end of calculation because then I run into
> memory problems.
> 
> So I need an efficient way to add elements once only to an array while
> calculation with an array as element.
> 
> How can I do this?

Given that your answers are integers, at the point that you put your 
answers into the array, assuming that the answer is in $ans:

if ( !isset( $arr ) )
  $arr = array();
$arr[$ans] = $ans;

When you finish calculations:

sort( $arr );
foreach ( $arr as $k=>$v )
  echo "Answer {$k} is {$v}.\n";

or:

sort( $arr );
echo "The answers are: " . implode( $arr, ", " ) . ".\n";

-- 
Denis McMahon, denismfmcmahon@gmail.com

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Thread

Unique array of arrays - how can I do this? thomas.lehmann.private@googlemail.com - 2013-05-04 04:51 -0700
  Re: Unique array of arrays - how can I do this? The Natural Philosopher <tnp@invalid.invalid> - 2013-05-04 13:20 +0100
  Re: Unique array of arrays - how can I do this? Denis McMahon <denismfmcmahon@gmail.com> - 2013-05-04 12:25 +0000
  Re: Unique array of arrays - how can I do this? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-05-06 00:06 +0200

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