23 lines
648 B
Clojure
23 lines
648 B
Clojure
(ns koans.05-sets
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(:require [koan-engine.core :refer :all]
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[clojure.set :as set]))
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(meditations
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"You can create a set by converting another collection"
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(= #{3} (set '(3)))
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"Counting them is like counting other collections"
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(= 3 (count #{1 2 3}))
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"Remember that a set is a *mathematical* set"
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(= #{1 2 3 4 5} (set '(1 1 2 2 3 3 4 4 5 5)))
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"You can ask clojure for the union of two sets"
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(= #{1 2 3 4 5} (set/union #{1 2 3 4} #{2 3 5}))
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"And also the intersection"
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(= #{2 3} (set/intersection #{1 2 3 4} #{2 3 5}))
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"But don't forget about the difference"
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(= #{1 4} (set/difference #{1 2 3 4 5} #{2 3 5})))
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