what is a more efficient way to accomplish this in clojure:
什么是在clojure中实现这一目标的更有效方法:
(defn ones
([n] (ones n 1 1))
([n i res]
(if (< i n)
(recur n (inc i) (bit-set res i))
res)))
preferably it should still "do the right thing" when it comes to numerical type.
当涉及到数字类型时,它应该仍然“做正确的事”。
1 个解决方案
#1
Why not take 2^(X-1) (by setting only the Xth bit) and then subtract 1?
为什么不取2 ^(X-1)(通过只设置第X位)然后减去1?
#1
Why not take 2^(X-1) (by setting only the Xth bit) and then subtract 1?
为什么不取2 ^(X-1)(通过只设置第X位)然后减去1?