10 Feb
2005
10 Feb
'05
8:29 p.m.
Jerzy pointed out the utility (well, at least the *possibility*) of expressions such as the following when writing points-free code (or perhaps per Matthew it should be "pointy code" :) ): (.) . (.) . (.) This is the function which composes a 1-argument function with a 3-argument function (and the pattern generalizes to n in the second functional argument). I sometimes itch to use the n=2 case, as in the following, but good sense usually gets the better of me: (.<) = (.) . (.) (this allows, for example, concat .< replicate). One gets the impression of some odd kind of Morse code, or perhaps "smileys" / "emoticons" ... The attached file gives some more detail and examples for the points-free fans. -- Fritz