Create quote koan

Covers
- quote
- syntax-quote
- unquote
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qc1iu 2016-02-22 17:32:30 +08:00 committed by Colin Jones
parent 4fe86ecc74
commit bfeaa7cf07
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2 changed files with 33 additions and 0 deletions

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@ -253,4 +253,11 @@
:park "AT&T Park"
'Giants
"Giants"]}]
["24_quote" {"__"[(1 2 3 4 5)
(1 2 3 4 5)
'age
quote
'(+ 2 3)
1 2 3
1 5]}]
]

26
src/koans/24_quote.clj Normal file
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(ns koans.24-quote
(:require [koan-engine.core :refer :all]))
(meditations
"use quote to express a list"
(= (quote __) (list 1 2 3 4 5))
"Clojure provide a shotcut"
(= (quote __) '(1 2 3 4 5))
"The quote special operator prevents its argument from being evaluated at all"
(= __ (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]))
"Th quote affects all of its argument, not just the top level"
(= (list 1 __) '(1 (+ 2 3)))
"Syntax-quote has a few extra features that make it ideal for constructing collections to be used as code."
(= (list __ __ __) `(1 2 3) '(1 2 3))
"Unquote is used to demarcate specific forms as requiring evaluation by prefixing fhem with the symbol ~ within the body of a syntax-quote"
(= (list __ __) `(1 ~(+ 2 3)) '(1 5))
)