Update 11_lazy_sequences.clj

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Alex Gorelov 2018-03-15 17:29:04 +03:00 committed by GitHub
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@ -2,27 +2,27 @@
(:require [koan-engine.core :refer :all]))
(meditations
"There are many ways to generate a sequence"
"Создаём последовательность"
(= __ (range 1 5))
"The range starts at the beginning by default"
"От нуля до …"
(= __ (range 5))
"Only take what you need when the sequence is large"
"Ленивые вычисления — взять только то что надо"
(= [0 1 2 3 4 5 6 7 8 9]
(take __ (range 100)))
"Or limit results by dropping what you don't need"
"Не брать того что не нужно, да и не хочется"
(= [95 96 97 98 99]
(drop __ (range 100)))
"Iteration provides an infinite lazy sequence"
"Если не указать сколько взять, можно переполнить стек. Такая функция."
(= __ (take 8 (iterate (fn [x] (* x 2)) 1)))
"Repetition is key"
"Повтор"
(= [:a :a :a :a :a :a :a :a :a :a]
(repeat 10 __))
"Iteration can be used for repetition"
"Результат идентичен"
(= (repeat 100 "hello")
(take 100 (iterate ___ "hello"))))