你如何在 Ruby 中将一个数组添加到另一个数组而不是得到多维结果?
问题描述：
somearray = ["some", "thing"]
anotherarray = ["another", "thing"]
somearray.push(anotherarray.flatten!)
我预料到了
["some","thing","another","thing"]
答
你有一个可行的想法，但 #flatten! 是在错误的地方——它压平了它的接收器，所以你可以用它把[1, 2, ['foo', 'bar']] 变成[1,2,'foo','bar'].
You've got a workable idea, but the #flatten! is in the wrong place -- it flattens its receiver, so you could use it to turn [1, 2, ['foo', 'bar']] into [1,2,'foo','bar'].
我无疑忘记了一些方法，但您可以连接:
I'm doubtless forgetting some approaches, but you can concatenate:
a1.concat a2
a1 + a2 # creates a new array, as does a1 += a2
或前置/附加:
a1.push(*a2) # note the asterisk
a2.unshift(*a1) # note the asterisk, and that a2 is the receiver
或拼接:
a1[a1.length, 0] = a2
a1[a1.length..0] = a2
a1.insert(a1.length, *a2)
或追加和展平:
(a1 << a2).flatten! # a call to #flatten instead would return a new array