Well, its not from the horses mouth, but heres a quick explanation.

Basically all Abigail-II is doing is conceptually breaking up the code by using the fat comma. Dont forget that semantically the => is equivelent to a comma (,) with the added nicety that if the item on the lhs is a bareword the bareword is automatically quoted.

print join " " => map {sprintf "%-${max}s" => $_}
                  splice @array => 0, $cols;
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is the same thing as

print join " " , map {sprintf "%-${max}s", $_}
                 splice @array, 0, $cols;
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as well as

print join(" ",map {sprintf "%-${max}s",$_}splice(@array,0,$cols));
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The easiest to read is the first I think you'll agree. (although i dont know that i would have used a fat comma in the sprintf() call but whatever ;-)

Yves / DeMerphq
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Writing a good benchmark isnt as easy as it might look.