Ruby嵌套数组

Question

我有一个嵌套数组，如下所示：

@nested = [
  ['1','2','3'],
  ['1','5','9'],
  ['1','4','7'],
  ['3','5','7'],
  ['3','6','9'],
  ['7','8','9'],
  ['4','5','6'],
  ['2','5','8']
]

我想获取任何整数（1..9）的用户输入，并查找具有该输入整数的每个数组。

不知道怎么做。

Answer 1

使用select：

num_to_search = "9"
@nested.select do |array|
  array.include? num_to_search
end
#=> [["1", "5", "9"], ["3", "6", "9"], ["7", "8", "9"]]