Clojurians Log v2

Hi! The first function :

#(if (< (count %) 5) %)

(fn [x]
  (if (< (count x) 5)
    x))

#(< (count %) 5)

(fn [x] (< (count x) 5))

Both will throw an exception if what you provide is not "countable"

> What does this anonymous function expand to? you can try that at the repl like :

user=> (macroexpand-1 '#(< (count %) 5))
(fn* [p1__2#] (< (count p1__2#) 5))

Thanks! I just learned that you can omit the second expression in if

Yeah, you can do that, but because it is confusing when exists and is preferred, which expands to almost that :

user=> (macroexpand-1 '(when true 5))
(if true (do 5))

when also wraps the body in a do so you can have multiple statements in its body