"Albert Lai"
I offer a simpler, more direct, and pre-existing correspondence between a functional programming construct and unix pipes:
Maybe my point wasn't clear. Of course this idea of comparing lazy evaluation to Unix pipes is very old (long before July 2004, I'm sure). The point I'm making is that there is an old idea that may be underused. We use ($) all over the place, but if there are a lot of them (and especially if they are spread over several lines) it becomes awkward to read the whole thing backward to trace through the function from beginning to end. In these cases, it's much simpler to use (\|) = flip ($) -- (#) seems to me too pretty for other purposes to use it here. infixl 0 \| -- Again, why can't this be negative or Fractional?? What I'm asking is really a question of pedagogy and style. This style seems reasonable to me. OTOH, there are some reasons not to do things in this way. Maybe any function big enough to benefit from writing it this way should be broken up anyway. Or maybe getting used to this style where the laziness is right in your face could make it more difficult for people to learn to reason through less obvious laziness. I'm really trying to figure out whether this approach is worth pursuing, rather than imply that this is a completely original idea. Chad Scherrer Computational Mathematics Group Pacific Northwest National Laboratory "Time flies like an arrow; fruit flies like a banana." -- Groucho Marx