Since you are soliciting opinions, I think your first version is an unusual usage of join. I think the most strightforward is your 3rd version (simple concatenation). And I do not think of join as being a three-argument function, as your title suggests. I think of is as two-agrument: an expression for the separator and a list.

In reply to Re: Perl style: Arguing against three-argument join() by toolic
in thread Perl style: Arguing against three-argument join() by martin

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