javascript - JS 将数组转换为对象，然后用属性值替换对象键

Question

我需要将数组转换为对象，然后需要将对象属性值之一移动为对象属性键名称:

[
  {
    "description": "red",
    "type": "fruit",
    "item": "apple"
  },
  {
    "description": "yellow",
    "type":"fruit",
    "item": "banana"
  }
]

进入

{
  "apple": {
    "description": "red",
    "type": "fruit"
  },
  "banana": {
    "description": "yellow",
    "type": "fruit"
  }
}

使用Object.assign({}, ...arr)将对象的名称填充到索引中，我需要更改该索引，谢谢!

Answer 1

您可以使用Array#reduce将数组折叠成一个对象。使用解构，您可以从对象中提取值，并以所需的输出格式创建一个新对象。

const data = [
  {
    "description": "red",
    "type": "fruit",
    "item": "apple"
  },
  {
    "description": "yellow",
    "type":"fruit",
    "item": "banana"
  }
]

console.log(
  data.reduce((accumulator, { item, description, type }) => ({
    ...accumulator,
    [item]: { description, type }
  }), {})
)

<script src="https://codepen.io/synthet1c/pen/KyQQmL.js"></script>