G'day.
Quoting Christian Maeder
http://www.informatik.uni-bremen.de/agbkb/forschung/formal_methods/CoFI/hets... As mentioned in an earlier discussion, I strongly disapprove of the use of multiple ($) applications in the same expression. Or, for that matter, most uses of ($). I also disapprove of avoiding parentheses for the hell of it. The guideline that I use is: If what you are expressing is a chain of function applications, the correct operator to express this is function composition. Low-priority application may then be used to apply this composed function to an argument. So, for example, f (g (h x)) can be expressed well as: f . g $ h x -- only use if you need to distinguish h f . g . h $ x -- better And poorly as: f $ g $ h x f $ g $ h $ x (f . g . h) $ x -- except as an intermediate step in refactoring Cheers, Andrew Bromage