如何在具有映射键值对的javascript中将数组转换为对象? [英] How to convert an array into an object in javascript with mapped key-value pairs?

问题描述

假设我有一个像这样的数组:

Let's say I have an array like so:

[ 
  {
    field: "firstname",
    value: "John"
  },
  {
    field: "lastname",
    value: "Doe"
  },
  {
    field: "hobbies",
    value: "singing, basketball"
  },
]

现在，我想将其转换为一个对象，如下所示，其中键是 field ，值是上述数组中的 value :

Now I want to convert it into an object like so where in the key is the field and the value is the value from the above array:

 const result = { 
      firstname: "John",
      lastname: "Doe",
      hobbies: "Singing, basketball"
    }

推荐答案

map()将数组转换为 Object.values 并将其传递给

map() the array to Object.values and pass it to Object.fromEntries()

const arr = [ { field: "firstname", value: "John" }, { field: "lastname", value: "Doe" }, { field: "hobbies", value: "singing, basketball" }, ]

const res = Object.fromEntries(arr.map(Object.values))
console.log(res)

另一个解决方案可能是使用 reduce()

The another solution could be using reduce()

const arr = [ { field: "firstname", value: "John" }, { field: "lastname", value: "Doe" }, { field: "hobbies", value: "singing, basketball" }, ]

const res = arr.reduce((ac,a) => (ac[a.field] = a.value,ac),{})
console.log(res)

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