Re: Proposal: Adding on

On Fri, 03 Nov 2006, Duncan Coutts wrote:

groupBy ((==) `on` fst)

Read it as "group by equality on first".

vs groupBy (equating fst)

So do you suggest that we deprecate and remove comparing?

Yes, this seems like a good idea. (I had forgotten that comparing was added before 6.6 was released.) I can add a deprecation pragma to my patch. Any objections? -- /NAD