4 ms·

I'm not sure what you mean. map is not supposed to be an endomorphism, rather it takes a function f and returns a list homomorphism.

• haldean 14y ago
  I think it'd be nice if it were an endomorphism, though; Making map(f, tuple) -> tuple, map(f, list) -> list, etc. would save users from having to write tuple(map(f, tuple)) (which is something I've done a bunch).
  • omaranto 14y ago
    Oh, you just meant you wanted lambda x: map(f,x) to be an endomorphism for any f (you said map itself should be an endomorphism which confused me). Well, it already does what you want: lambda x: map(f,x) takes an iterable and returns an iterable. :)
    • haldean 14y ago
      Fair enough (: I'm not the parent, by the way -- I was just taking a stab at what the parent might mean.