You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
26 lines
824 B
Clojure
26 lines
824 B
Clojure
(ns koans.24-quote
|
|
(:require [koan-engine.core :refer :all]))
|
|
|
|
|
|
(meditations
|
|
"Wrap a quote around a list to suppress evaluation"
|
|
(= (quote (1 2 3 4 5)) __)
|
|
|
|
"There is a shortcut too!"
|
|
(= (quote __) '(1 2 3 4 5))
|
|
|
|
"You can quote symbols as well as lists... without evaluation!"
|
|
(= __ (let [age 9] (quote age)))
|
|
|
|
"You can use a literal list as a data collection without having Clojure try to call a function"
|
|
(= (cons 1 (__ (2 3))) (list 1 2 3) (cons 1 [2 3]))
|
|
|
|
"The quote affects all of its arguments, not just the top level"
|
|
(= (list 1 __) '(1 (+ 2 3)))
|
|
|
|
"Syntax-quote (`) acts similarly to the normal quote"
|
|
(= (list __ __ __) `(1 2 3) '(1 2 3))
|
|
|
|
"Unquote (~) within a syntax-quoted expression lets you mark specific expressions as requiring evaluation"
|
|
(= (list __ __) `(1 ~(+ 2 3)) '(1 5)))
|