A quick comment. This bit of code is redundant:
return wantarray ? ( $end_points[ 0 ] ) : $end_points[ 0 ];
A list is made by context, whether or not there are parentheses. Parentheses just provide precedence, as in print join('|', @cols), "\n". Either of these will work just as well, whichever context the function is called in: 
return $end_points[0];
return ( $end_points[0] );

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[There are a couple odd exceptions, such as the left hand side of the x operator. ($var x 3 returns a string, while ($x) x 3 returns a list.) But in general, parentheses are unnecessary around a list except for precedence.]

In reply to Re: Critique yet another List-to-Range function by chipmunk
in thread Critique yet another List-to-Range function by scott

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