假设我有这个数组:
[0, 1, 4], [2, 3]
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我怎样才能合并它们以获得:
[0,2], [0,3], [1,2], [1,3], [4,2], [4,3]
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我试过:
[0, 1, 4], [2, 3]
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但我得到了:
[[0, 2], [1, 3], [4, nil]]
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有任何想法吗?
[0, 1, 4].product([2, 3])
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这应该生成:
[[0, 2], [0, 3], [1, 2], [1, 3], [4, 2], [4, 3]]
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