Created
December 15, 2011 22:36
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7L7W Clojure - Day 1
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| ;Implement a function called (big st n) that returns true if a string st | |
| ;is longer than n characters. | |
| (defn big [st n] (> (count st) n)) | |
| ;Write a function called (collection-type col) that returns :list, :map, | |
| ;or :vector based on the type of collection col. | |
| (defmulti collection-type class) | |
| (defmethod collection-type clojure.lang.IPersistentList [arg] :list) | |
| (defmethod collection-type clojure.lang.IPersistentMap [arg] :map) | |
| (defmethod collection-type clojure.lang.IPersistentVector [arg] :vector) | |
| (defmethod collection-type :default [arg] :unknown) | |
| ; user=> (collection-type ["one", "two", "three"]) | |
| ; :vector | |
| ; user=> (collection-type {:chewie :wookie :lea :human}) | |
| ; :map | |
| ; user=> (collection-type (hash-map :chewie :wookie :lea :human)) | |
| ; :map | |
| ; user=> (collection-type (sorted-map :chewie :wookie :lea :human)) | |
| ; :map | |
| ; user=> (collection-type (list "a" "b")) | |
| ; :list | |
| ; user=> (collection-type (quote ("a" "b"))) | |
| ; :list | |
| ; user=> (collection-type '("a" "b")) | |
| ; :list | |
| ; user=> (collection-type 23) | |
| ; :unknown |
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| ; Examples using Clojure sequences | |
| ; http://clojure.org/sequences | |
| ; http://stackoverflow.com/questions/1989301/clojure-sequence-back-to-vector | |
| ; http://www.moxleystratton.com/article/clojure/for-non-lisp-programmers#sequences | |
| ; The formal definition of a Clojure function | |
| ; A script for quickly invoking the repl in your environment | |
| ; https://github.com/technomancy/leiningen | |
| ; lein repl |
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