Ruby索引赋值

Question

我有这段代码：

items = ["place", "key", "holder"]
items[1,0] = ["bottle", "my"]
items # => ["place", "bottle", "my", "key", "holder"]

"my"如何排在第三位？

Answer 1

ary[start, length] = obj or other_ary or nil → obj or other_ary or nil

的Ref Array方法

items[1,0] = ["bottle", "my"]
Here, 1 is Index & Length is 0

根据文档'元素在开始时插入到数组中，如果长度为＆amp;指数为零。'

对于Ex： -

a = ['A']
a[0, 0] = [ 1, 2 ]          #=> array a will be [1, 2, "A"]

同样，当Index不为零时，＆amp;长度为零'元素从给定的索引'

插入到数组中

a = ['A']
a[1, 0] = [ 1, 2 ]          #=> array a will be ["A", 1, 2]