I'm still trying to settle on a "feel" for good programming style in Haskell. One thing I've been making some use of lately is (\|) = flip ($) infixl 0 \| Then expressions like f4 $ f3 $ f2 $ f1 $ x become x \| f1 \| f2 \| f3 \| f4 I've seen something like this on haWiki using (#), but I prefer this notation because it looks like a Unix pipe, which is exactly how it's used. This style makes the sequential feel of monadic do notation available to non-monadic functions, and would seem to ease the initial confusion most people experience when they first program using lazy evaluation. Many newbies have experience with Unix pipes, and this notation makes that analogy explicit. I have a couple of questions about this... First, it would be convenient if ($) could appear in an fi without extra parentheses, but this would require "infixl (-1) \|". Is there a reason this isn't allowed? The current fixities don't seem to allow much room for expansion. Would it be possible to either (1) allow negative and/or fractional fixities, or (2) shift and spread out the current fixities to allow more flexibility in the introduction of new operators? I'm also trying to determine to what extent this style should really be used. Does anyone see this as "bad style"? Is there an argument why this might not be such a good way to ease someone into the language? Chad Scherrer Computational Mathematics Group Pacific Northwest National Laboratory "Time flies like an arrow; fruit flies like a banana." -- Groucho Marx