Re: Proposal: Add foldrWithIndex and foldlWithIndex to Data.List

I'm a pretty strong -1 on moving foldrWithIndex into Data.Foldable. Why? The only index Foldable can provide is an ordinal index starting at 0. The one folks _expect_ in many cases from Map k, IntMap and the like is the key. This introduces a huge source of potential confusion and new name conflicts for marginal benefit. -Edward On Thu, Oct 16, 2014 at 1:21 PM, David Feuer wrote:

Actually, that proposal is firmly in the past. Let's *move* foldrWithIndex and foldlWithIndex from Data.Sequence to Data.Foldable!

On Thu, Oct 16, 2014 at 1:14 PM, David Feuer wrote:

...

These functions can be lifted pretty much straight out of Data.Sequence. In particular, foldrWithIndex makes for a particularly nice expression of a fusing findIndices function, as is present in Data.Sequence.

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