如果 {{assoc-in}} 支持多个键到值对会很好(在参数数量为偶数时抛出错误,就像 {{assoc}} 一样)
user=> (assoc-in {} [:a :b] 1 [:c :d] 2)
{:a {:b 1}, :c {:d 2}}
user=> (assoc-in {} [:a :b] 1 [:c :d])
IllegalArgumentException assoc-in 预期在映射/向量后面的参数数量为偶数,但找到奇数个参数
* 补丁: clj-1771.patch
* 审核人: Alex Miller