javascript - 如何将嵌套数组减少为单个对象数组

Question

我正在尝试将嵌套数组减少为对象数组，因为我想将多级数组拆分为数组的单个对象

这是我想要减少的数组结构

var array1 = [
  {
    "course": "ABC"
    "skills":["skill1", "skill2"],
  },
  {
    "course": "DEF"
    "skills":["skill1"],
  },
  {
    "course": "GHI"
    "skills":["skill1", "skill2", "skill3"],
  }
]

我期望的结果

var array1 = [
  {
    "course": "ABC"
    "skill":"skill1",
  },
  {
    "course": "ABC"
    "skill":"skill2",
  },
  {
    "course": "DEF"
    "skill":"skill1",
  },
  {
    "course": "GHI"
    "skills":"skill1",
  },
  {
    "course": "GHI"
    "skills":"skill2",
  },
  {
    "course": "GHI"
    "skill": "skill3",
  }
]

Answer 1

var array1 = [
  {
    course: "ABC",
    skills:["skill1", "skill2"]
  },
  {
    course: "DEF",
    skills: ["skill1"]
  },
  {
    course: "GHI",
    skills: ["skill1", "skill2", "skill3"]
  }
];

const flatten = array =>
  array.reduce((results, item) => [...results, ...item.skills.map(skill => ({ course: item.course, skill: skill }))], []);


console.log(flatten(array1));