clojure Truthiness Truthiness
Example
In Clojure everything that is not nil or false is considered logical true.
Examples:
(boolean nil) ;=> false
(boolean false) ;=> false
(boolean true) ;=> true
(boolean :a) ;=> true
(boolean "false") ;=> true
(boolean 0) ;=> true
(boolean "") ;=> true
(boolean []) ;=> true
(boolean '()) ;=> true
(filter identity [:a false :b true]) ;=> (:a :b true)
(remove identity [:a false :b true]) ;=> (false)
