将数组推送到ruby上的数组只需一个级别

Question

假设：

a = [[1,"a"],[2,"b"]]
b = [[3,"c"],[4,"d"]]

我想将a变成[[1,"a"],[2,"b"][3,"c"],[4,"d"]]。如果没有+怎么办呢？它创建了一个我想避免的新数组。

(a << b).flatten(1)
# => [1, "a", 2, "b", [3, "c"], [4, "d"]]

Answer 1

a.concat(b)

...............................

Answer 2

concat就是答案，但你可以这样做：

a.object_id    #=> 70223889895340
a.replace(a+b) #=> [[1, "a"], [2, "b"], [3, "c"], [4, "d"]]
a              #=> [[1, "a"], [2, "b"], [3, "c"], [4, "d"]]
a.object_id    #=> 70223889895340 

Answer 3

怎么样？

name="something[]"

Answer 4

这个怎么样？

a + b 
=> [[1, "a"], [2, "b"], [3, "c"], [4, "d"]]