Hi, I have a question about some code. To confirm this code is working, but I need some help understanding it. 
@union = @intersection = @difference = ();
%count = ();
foreach $element (@array1, @array2) { $count{$element}++ }
foreach $element (keys %count) {
push @union, $element;
push @{ $count{$element} > 1 ? \@intersection : \@difference }, $eleme
+nt;
}

"foreach $element (@array1, @array2) { $count{$element}++ }"

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I understand the foreach goes through both arrays, and adds a count of each unique object in both arrays, could someone elaborate on how this works and what "$count{$element}++" means? Also the line "push @{ $count{$element} > 1 ? \@intersection : \@difference }, $element;" It appears to say if the value count it greater than one, but in intersection else put in difference? Although I dont understand why this work. where could I get some more information? Thanks in advance. Mark

In reply to Clarification of code - find array intersection by relientmark

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