根据对象的key，将一个对象的键值映射到另一个对象数组中的对应属性上

Question

问题描述

var obj ={
  apple: 1,
  banana:2,
  li:30
};
var arr = [
  {id:'1',text:'苹果',key:'apple', value:''},
  {id:'2',text:'梨', key:'li',value:''},
  {id:'3',text:'香蕉', key:'banana', value:''}
];

// 结果：生成一个新的数组
var newArr = [
  {id:'1',text:'苹果',key:'apple', value:'1'},
  {id:'2',text:'梨', key:'li',value:'2'},
  {id:'3',text:'香蕉', key:'banana', value:'30'}
];

如何实现？

Answer 1

梨不是 30 么。。。

var obj ={
  apple: 1,
  banana:2,
  li:30
}
var arr = [
  {id:'1',text:'苹果',key:'apple', value:''},
  {id:'2',text:'梨', key:'li',value:''},
  {id:'3',text:'香蕉', key:'banana', value:''}
]

const newArr = arr.map(o => {
  o.value = obj[o.key]
  return o
})

console.log(newArr)

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Answer 2

var newArr = arr.map(item=>{
    let newObj = JSON.parse(JSON.stringify(item))
    let value = obj[ newObj[key] ]
    newObj.value = value ? value : ''
    return newObj
})

Answer 3

var data = arr.map(function (item) {

item.value = obj[item.key];
return item

});