JS从数组创建多值对象数组

Question

试图得到这个['Team Instinct', 'Team Valor', 'Team Mystic']

对此

[{
    answer: "Team Instinct",
    id: asdfsodijha120-938a //nanoid()
 },
 {
    answer: "Team Valor",
    id: 12390i1-293-12093a2 //nanoid()
 },
 {
    answer: "Team Mystic",
    id: 123908320i09i09ss8a //nanoid()
 }
]

到目前为止我尝试了什么

const { nanoid } = require("nanoid")

const array = ['Team Instinct', 'Team Valor', 'Team Mystic']
let object = {}

obcject = array.reduce((prevValue,currentValue) => {
    prevValue.push({
        answer: currentValue,
        id: nanoid()
    })
},[])

我收到错误 TypeError: Cannot read properties of undefined (reading 'push')

Answer 1

您忘记了 return prevValue；

 const { nanoid } = require("nanoid")
    
    const array = ['Team Instinct', 'Team Valor', 'Team Mystic']
    let object = {}
    
    obcject = array.reduce((prevValue,currentValue) => {
        prevValue.push({
            answer: currentValue,
            id: nanoid()
        })
        return prevValue
    
    },[])

Answer 2

当你使用reducer时你渴望 return 推入后的价值。

所以第一个错误，你永远不会 return 回调函数中的结果。第二个是您尝试将 reduce（数组）的结果分配给对象。

const { nanoid } = require("nanoid");

const array = ['Team Instinct', 'Team Valor', 'Team Mystic'];

const result = array.reduce((prevValue,currentValue) => {
    prevValue.push({
        answer: currentValue,
        id: nanoid()
    });
    return prevValue;
},[]);

Answer 3

原答案正确，您漏了 return。但是，这里有另一种写法

const { nanoid } = require("nanoid")
let object = ['Team Instinct', 'Team Valor', 'Team Mystic'].reduce((prevValue, currentValue) => ([...prevValue, {
  answer: currentValue,
  id: nanoid()
}]), [])

JS从数组创建多值对象数组

JS creating multi value objects array from an array

javascript

arrays

reduce

object

node.js