Haskell Language Function composition Right-to-left composition
Example
(.) lets us compose two functions, feeding output of one as an input to the other:
(f . g) x = f (g x)
For example, if we want to square the successor of an input number, we can write
((^2) . succ) 1 -- 4
There is also (<<<) which is an alias to (.). So,
(+ 1) <<< sqrt $ 25 -- 6
