mukesh tiwari
You can write (f . g) x as f . g $ x so for me, it's avoiding extra parenthesis.
Here comes my usual lecture: The ($) operator can be harmful when explicitly used to avoid extra parentheses, because it makes code flat. Besides grouping function application parentheses also serve a readability purpose, about the same one as indentation. In other words, think twice before you overuse ($). Background: In some of my projects I have noticed that to revisit old code I had an easier time rewriting some of my ($) applications back to parentheses to make the code structure more apparent and easier for the eye, particularly when both sides of ($) were long and multiple ($)s were involved. But even in very simple cases parentheses just look much nicer. Compare print $ sin x with print (sin x) The latter just looks nicer, at least to my eyes. Of course there are cases when ($) is really preferred, like when one side is very long, perhaps multi-lined, and the other is very short: log $ "Client connecting from " ++ hostname or: withSteak $ \steak -> do getHungry eatWith cutlery steak beHappy But then of course in many cases you get hungry long before you get the steak: getHungry withSteak (eatWith cutlery) beHappy Greets, Ertugrul -- Not to be or to be and (not to be or to be and (not to be or to be and (not to be or to be and ... that is the list monad.