如何在散列数组中添加散列对象的数字表示？

Question

像

这样的哈希数组

  [{color: "red", size: "large"},{color: "blue", size: "small"},{color: purple, size: "medium"},{color: "pink", size: "small"}]

另一个哈希：

  {small: 1, medium: 2, large: 3, x_large: 4}

有人会如何用各自的数字替换所有尺码并总结这些数字？

可以通过将数字替换为大小如此来手动解决问题：

 [{color: "red", size: 3},{color: "blue", size: 1},{color: purple, size: 2},{color: "pink", size: 1}]

然后将它们添加到大小的数字表示中将输出：7

Answer 1

迭代你的第一个数组，用第二个数组中的corrospoding大小替换:size：

arr = [{color: "red", size: "large"},{color: "blue", size: "small"},{color: "purple", size: "medium"},{color: "pink", size: "small"}]

sizes =   {small: 1, medium: 2, large: 3, x_large: 4}


arr.each do |x|
  x[:size] = sizes[x[:size].to_sym]
end