在数组中创建并推送键值 object

Question

I have an array:

const data = [{"label": "a", "value": 4}, {"label": "b", "value": 1}, {"label": "c", "value": 2}]

I want to create a new array of objects where I have to give key and value in it.

For eg,:

const newArr = [{1,4},{2,1},{3,2}]

here first item of an object is the key, which has to increase as the number of objects increase, and second item is the value from data .

Answer 1

 const data = [{"label": "a", "value": 4}, {"label": "b", "value": 1}, {"label": "c", "value": 2}]; const out = data.map((item, index) => [index + 1, item.value]); console.log(out);

Answer 2

I hope this is your solution:

 const data = [ { label: 'a', value: '4' }, { label: 'b', value: '1' }, { label: 'c', value: '2' }, ] const newArrOfObj = data.reduce((arr, current, index)=> [...arr, {[index+1]:current.value}], []); console.log(newArrOfObj) //[ { 1: '4' }, { 2: '1' }, { 3: '2' } ]

Answer 3

To push an object into an array, call the push() method, passing it the object as a parameter. For example, arr.push({name: 'Tom'}) pushes the object into the array. The push method adds one or more elements to the end of the array.

index.js

 let arr = []; const obj = {name: 'Tom'}; arr.push(obj); console.log(arr); // ️ [{name: 'Tom'}]