I know the "$" matches the last character but not sure how to eliminate the ",".

If so, then you know wrong. $ matches the end of the string (just after the last character), not the last character itself. (It's also possible that you just phrased it unclearly, but I figure better safe than sorry...)

Aside from that, avoid adding the comma in the first place if possible (probably by using join to buld the string), use s/,$// if not, just like others have said.

In reply to Re: Eliminating last comma by dsheroh
in thread Eliminating last comma by Anonymous Monk

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