4

我正在尝试过滤和重新排序哈希数组。过滤器和顺序由另一个字符串数组定义,它们表示"slug"哈希键的值。结果数组应仅包含其"slug"键值包含在 slugs 数组中并按相同顺序排序的哈希值。如果我有第一个数组:

data = [
  {
    "slug" => "lemon",
    "label" => "Lemon Label"
  },
  {
    "slug" => "table",
    "label" => "Table Label"
  },
  {
    "slug" => "peach",
    "label" => "Peach Label"
  },
  {
    "slug" => "strawberry",
    "label" => "Strawberry Label"
  },
  {
    "slug" => "bread",
    "label" => "Bread Label"
  },
  {
    "slug" => "orange",
    "label" => "Orange Label"
  }
]

第二个数组为:

ordered_keys = ["orange", "lemon", "strawberry"]

那么,结果应该是这样的数组:

result = [
  {
    "slug" => "orange",
    "label" => "Orange Label"
  },
  {
    "slug" => "lemon",
    "label" => "Lemon Label"
  },
  {
    "slug" => "strawberry",
    "label" => "Strawberry Label"
  }
]

我设法通过以下方式获得了过滤功能:

result = data.select{|x| ordered_keys.include? x.slug}

但我找不到一个聪明的方法来订购一个。有任何想法吗?

4

1 回答 1

11

用于map将您的有序键数组转换为相应的哈希。输入数组map的顺序定义输出数组的顺序。

ordered_keys.map{|k| data.find{|h| h["slug"] == k}}
于 2013-04-22T18:22:03.267 回答