如何在数组中合并哈希?

时间:2019-06-06 06:57:48

标签: ruby ruby-hash

如何合并这些数组中的哈希:

description = [
  { description: "Lightweight, interpreted, object-oriented language ..." },
  { description: "Powerful collaboration, review, and code management ..." }
]

title = [
  { title: "JavaScript" },
  { title: "GitHub" }
]

所以我得到了

[
  {
    description: "Lightweight, interpreted, object-oriented language ...",
    title: "JavaScript"
  },
  {
    description: "Powerful collaboration, review, and code management ...",
    title: "GitHub"
  }
]

3 个答案:

答案 0 :(得分:3)

如果1)仅合并两个列表,2)您确定列表长度相同,并且3)必须将列表l1的第n个项目与{{1}的第n个项目合并}(例如,两个列表中的项目均已正确排序),只需完成

l2

答案 1 :(得分:0)

编写以下代码

firstArray=[{:description=>"\nLightweight, interpreted, object-oriented language with first-class functions\n"}, {:description=>"\nPowerful collaboration, review, and code management for open source and private development projects\n"}]

secondArray=[{:title=>"JavaScript"}, {:title=>"GitHub"}]

result=firstArray.map do |v|
  v1=secondArray.shift
  v.merge(v1)
end

p result

结果

[{:description=>"\nLightweight, interpreted, object-oriented language with first-class functions\n", :title=>"JavaScript"}, {:description=>"\nPowerful collaboration, review, and code management for open source and private development projects\n", :title=>"GitHub"}]

答案 2 :(得分:0)

description = [
  { description: "Lightweight, interpreted" },
  { description: "Powerful collaboration" }
]

title = [
  { title: "JavaScript" },
  { title: "GitHub" }
]

description.each_index.map { |i| description[i].merge(title[i]) }
  #=> [{:description=>"Lightweight, interpreted",
  #     :title=>"JavaScript"},
  #    {:description=>"Powerful collaboration",
  #     :title=>"GitHub"}]

使用zip时会构造临时数组description.zip(title)。相比之下,上述方法不创建任何中间数组。