balkian/clojure-koans
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Tweak wording very slightly for new macros koans.

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This commit is contained in:
Colin Jones 2011-02-08 07:20:38 -06:00
parent 08415ecb94
commit bc9113fe60
2 changed files with 15 additions and 22 deletions
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16
src/koans/macros.clj
View File

@ -1,18 +1,14 @@
"Macros are also just functions!"
(defmacro hello [x]
(str "Hello, " x))
"Create a list and use it to be eval-ed at run time"
(defmacro infix [form]
(list (second form) (first form) (nth form 2)))
"Sometimes it is easier to handcraft it ..."
(defmacro infix-better [form]
`(~(second form)
__
__ ))
"Macro in a macro until you get a stack overflow! ;)"
(defmacro r-infix [form]
(list (second form)
(if (instance? clojure.lang.PersistentList (first form))
@ -25,23 +21,21 @@
(meditations
"Macros are just function eval-ed at compile time"
(= "Hello, Macros!" (hello "Macros!"))
"Macros are like functions created at compile time"
(= __ (hello "Macros!"))
"Can I haz some infix?"
(= __ (infix (9 + 1)))
"Remember these are nothing but code transformations"
"Remember, these are nothing but code transformations"
(= __ (macroexpand '(infix (9 + 1))))
"You can do better than that, hand crafting ftw"
"You can do better than that, hand crafting ftw!"
(= __ (macroexpand '(infix-better (10 * 2))))
"Things dont always work as you would like them to... "
(= __ (macroexpand '(infix-better ( 10 + (2 * 3)))))
"Really, you dont understand recursion until you understand recursion"
(= __ (r-infix (10 + (2 * 3))))
)
(= __ (r-infix (10 + (2 * 3)))))

15
src/path_to_answer_sheet.clj
View File

@ -135,14 +135,13 @@
'(fn [x] (+ 20 x))]}
"macros" {"__" ['~(first form)
'~(nth form 2)
10
''(+ 9 1)
''(* 10 2)
''(+ 10 (2 * 3))
16
]
}
'~(nth form 2)
"Hello, Macros!"
10
''(+ 9 1)
''(* 10 2)
''(+ 10 (2 * 3))
16]}
})
(defn replace-with [s k replacements]