Question

基本上我有一个对象数组。每个对象都有一个我需要更改值的数组。

我正在使用React，所以这是一种状态：

<el-table
    :data="packageForm.package_courses"
    show-summary
    :summary-method="getSummaries"
    border>

>all the other stuff in there

<el-table>

更改此状态的[ { "points": [ 60, 5, 60, 20, 70, 20, 70, 15 ], "finished": true, "color": "#6292C6" }, { "points": [ 80, 15, 80, 25, 90, 25 ], "finished": true, "color": "#3FD971" }, { "cultureName": "", "points": [], "finished": false } ]值的最佳方法是什么？我需要将它们乘以一个系数（4.96）。

Answer 1

map您的数组，spread里面的每个对象仅覆盖属性points（map将每个项目乘以因子4.96）

const data = [{id: 1, points: [1,2,3]}, {id: 2, points: []}]

const changedData = data.map(item =>({
    ...item,
    points : item.points.map(value => value * 4.96)
}))

console.log(changedData)

Answer 2

使用嵌套地图

const myData = [
    {"points": [60,5,60,20,70,20,70,15],"finished": true,"color": "#6292C6"},
    {"points": [80,15,80,25,90,25],"finished": true,"color": "#3FD971"},
    {"cultureName": "","points": [],"finished": false}
]
  
  
  const newArray = myData.map(elm=>{
    const points = elm.points.map(point=> point*4.96)
    return {...elm , points}
  })
  
  console.log(newArray)

Answer 3

const factor = 4.96
const arrayOfObject = [] // .. here your array of objects
const modifiedArrayOfObjects = arrayOfObject.map( stats => {
  const newPoints = stats.points.map(point => point * factor)
  stats.points = newPoints
  return stats
}

在这里我制作了一个新的对象数组，在其中将每个对象映射到一个对象，其中每个点都乘以您的因子。

如何更改对象数组中的数组中的每个值？

3 个答案: