I have an array of arrays. I want to sort the arrays based on one element, with index $sortNdx. The following code compiles OK, but doesn't do anything. The array is left unchanged. Any suggestions as to why? 
@sorted = sort {$bigArray[$a][$sortNdx] <=> $bigArray[$b][$sortNdx]} @
+bigArray;
@bigArray = @sorted;

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In reply to this doesn't sort by hsfrey

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