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Sorting of Multidimensional arrays

Posted on 2007-11-26
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Last Modified: 2010-04-21
A have an array of arrays which I want to sort according to the 3rd element of each of the child arrays, how can I do that?
In the code snippet below I would like the output to be:
5,3
3,5
9,9
@array1 = (20,10,5,3,-4);
@array2 = (5,4,3,2,1);
@array3 = (10,9,8,7,6);
 
@array = ($array1,$array2,$array3);
 
@sorted = sort by_3rd @array;
 
foreach $i (0..$#array)
{
	print $array[$i][2],",",$sorted[$i],"\n";
}
 
sub by_3rd
{
???????????
}
 
Desired output:

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Question by:shayb022800
2 Comments
 
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Accepted Solution

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ozo earned 360 total points
ID: 20352941
@array1 = (20,10,5,3,-4);
@array2 = (5,4,3,2,1);
@array3 = (10,9,8,7,6);

@array = (\@array1,\@array2,\@array3);
@sorted = sort{$a->[2] <=> $b->[2]} @array;
foreach $i (0..$#array)
{
    print $array[$i]->[2],",",$sorted[$i]->[2],"\n";
}
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Author Closing Comment

by:shayb022800
ID: 31411072
OZO you are indeed a genius, thanks!
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