如何在Clojure中编写Ruby的each_cons？

Question

如何在Clojure中重写这个Ruby代码？

seq = [1, 2, 3, 4, 5].each_cons(2) 
#=> lazy Enumerable of pairs
seq.to_a
=> [[1, 2], [2, 3], [3, 4], [4, 5]]

Clojure的:

(??? 2 [1 2 3 4 5])
;=> lazy seq of [1 2] [2 3] [3 4] [4 5]

Answer 1

您要求的是在懒惰序列上称为滑动窗口.这样您就可以实现这一点

user=> (partition 2 1 [1 2 3 4 5])
((1 2) (2 3) (3 4) (4 5))