Anirban Adhikary wrote:
Dear List
Hello,
I have written the following code ............. use Data::Dumper; %file = (14 => "GGG", 11 => "AAA", 101 => "EEE", 1 => "TTT"); print Dumper \%file; @arr1 = sort { $file{$b} cmp $file{$a} } keys %file; #the oldest entry lies at the top position print Dumper [EMAIL PROTECTED]; foreach $el(@arr1) { delete $file{$el}; print "The $el is removed from the sorted list"."\n"; @arr1 = sort { $file{$b} cmp $file{$a} } keys %file; #the oldest entry lies
perldoc perlsyn [ SNIP ] If any part of LIST is an array, "foreach" will get very confused if you add or remove elements within the loop body, for example with "splice". So don’t do that.
at the top position print "After sorting the array elements are"."\n"; print Dumper [EMAIL PROTECTED]; } ---------------output ------------ $VAR1 = { '1' => 'TTT', '11' => 'AAA', '101' => 'EEE', '14' => 'GGG' }; $VAR1 = [ '1', '14', '101', '11' ]; The 1 is removed from the sorted list After sorting the array elements are $VAR1 = [ '14', '101', '11' ]; The 101 is removed from the sorted list After sorting the array elements are $VAR1 = [ '14', '11' ]; In the last output I think the list is not sorted properly. How can I solve this problem.
It is sorted properly, it's just that you are modifying the array @arr1 inside a foreach loop that iterates over that same array and you shouldn't do that.
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