在一行中创建多个数组 [英] Create multiple arrays in one line

问题描述

我做到了:

a, b = Array.new(2, [0, 0])
a[0] = 1

我有:

a # => [1, 0]

我遇到b的问题，这与a相同:

I have a problem with b, which is the same as a:

b # => [1, 0]

问题是参考地址.

帮我在一行中初始化数组.

Help me initialize array in one line.

推荐答案

当发送第二个参数(到Array.new)时，相同的对象将用作所有数组元素的值:

When sending the second parameter (to Array.new), the same object will be used as the value for all the array elements:

因此，正如@mudasobwa在评论中已经建议的那样，您需要使用对每个元素使用块结果的块版本:

So, as @mudasobwa already suggested in the comments, you need to use the block version which uses the result of block for each element:

a, b = Array.new(2) { [0, 0] }
 => [[0, 0], [0, 0]]

a[0] = 1

a
 => [1, 0]

b
 => [0, 0]

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