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Your point is, of course valid. However, you should test your code before running it. Your or is lower precedence than = (see Operator Precedence and Associativity). This is, for example, why the classic or die construct works so well. This also means your code will never actually sort by string - warnings would have told you that you are performing a comparison in void context. In addition, + is a no-op in unary operator context; you likely meant the numification ("Venus") operator, 0+. This will not suppress the string in numeric context warnings either, since you are still using a string in a numeric context.

If you want to do auto-detection, you'd be better off using the Conditional Operator using looks_like_number from Scalar::Util:

sub cmp_by { use Scalar::Util 'looks_like_number'; my $result = 0; for my $term (@_) { $result ||= looks_like_number($a) ? $a->{$term} <=> $b->{$term} : $a->{$term} cmp $b->{$term}; } return $result; }

#11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.


In reply to Re^3: Multiple Sort on selected column by kennethk
in thread Multiple Sort on selected column by huchister

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