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  1. (def atom?
  2.   (fn [a]
  3.     (not (seq? a))))
  4.  
  5. (println "(atom? 'a) = " (atom? 'a))
  6. (println "(atom? '(a)) = " (atom? '(a)))
  7. (println "")
  8.  
  9. (def null?
  10.   (fn [a]
  11.     (or
  12.       (nil? a)
  13.       (= () a))))
  14.  
  15. (println "(null? nil) = " (null? nil))
  16. (println "(null? 'a) =  " (null? 'a))
  17. (println "(null? '(a)) = " (null? '(a)))
  18. (println "(null? '()) = " (null? '()))
  19.  
  20.  
Success #stdin #stdout 1.53s 389120KB
comments (?)
stdin 
Standard input is empty
stdout 
(atom? 'a) =  true
(atom? '(a)) =  false

(null? nil) =  true
(null? 'a) =   false
(null? '(a)) =  false
(null? '()) =  true
https://ideone.com/7TnNN
language:
Clojure (clojure 1.10.0)
created:
10 years ago
visibility:
public

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