[Haskell-cafe] foldr (.) id

Ross Paterson ross at soi.city.ac.uk
Sat Oct 27 12:09:16 CEST 2012

On Fri, Oct 26, 2012 at 07:41:18PM +0100, Greg Fitzgerald wrote:
> I've recently found myself using the expression: "foldr (.) id" to
> compose a list (or Foldable) of functions.  It's especially useful
> when I need to map a function over the list before composing.  Does
> this function, or the more general "foldr fmap id", defined in a
> library anywhere?  I googled and hoogled, but no luck so far.

Alternatively: flip (foldr id)

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