JSFiddle - React, Tailwind, and code Playground

JavaScript

let myArray = [
  {
    id: 1,
    name: 'john',
    age: '22',
    position: 'developer'
  },
  {
    id: 2,
    name: 'james',
    age: '31',
    position: 'designer'
  },
  {
    id: 1,
    name: 'david',
    age: '45',
    position: 'teacher'
  }
]

let updateForJames = {
    age: '38',
    position: 'project manager'
}

let JamesId = 2

Object.assign(myArray, {
	// ...
})

console.log(myArray)