javascript object from array code example

Example 1: js create object from array

[
  { id: 10, color: "red" },
  { id: 20, color: "blue" },
  { id: 30, color: "green" }
].reduce((acc, cur) => ({ ...acc, [cur.color]: cur.id }), {})

//output: 
{red: 10, blue: 20, green: 30}

Example 2: javascript convert Object.entries back to object

const arr = [ ['0', 'a'], ['1', 'b'], ['2', 'c'] ];
const obj = Object.fromEntries(arr);
console.log(obj); // { 0: "a", 1: "b", 2: "c" }

Example 3: how to get array from object in javascript

let result = objArray.map(({ foo }) => foo)

Example 4: return an object from an array javascript

myArray.find(item => item.isAstronaut)