finding-objects-and-values-in-arrays-part-2

finding-objects-and-values-in-arrays-part-2-1.js

let arr = [
  {id: 1, name: 'Adam'},
  {id: 2, name: 'Bell'},
  {id: 3, name: 'Cody'},
  {id: 4, name: 'Dawn'}
];

finding-objects-and-values-in-arrays-part-2-2.js

let arr = [{id: 1, name: 'Adam'},{id: 2, name: 'Bell'},{id: 3, name: 'Cody'}],
    value = 2;

// Array.find()
let result = arr.find(x => x.id === value); // 1
console.log('result', result); // {id: 2, name: 'Bell'}

// Array.findIndex()
let index = arr.findIndex(x => x.id === value); // 1
console.log('arr[index]', arr[index]); // {id: 2, name: 'Bell'}

// for - v.1
let result1 = null;

for(let i = 0; i < arr.length; i++) {
    if(arr[i].id === value) {
      result1 = arr[i];
      break; // We are looking for the first occurrence of the object;
    };
};
console.log('result1', result1); // {id: 2, name: 'Bell'}

// for - v.2
let result2 = null;

for (let val of arr) {
  if(val.id === value) {
    result2 = val;
  }
}
console.log('result2', result2); // {id: 2, name: 'Bell'}

// while
let result3 = null,
    j = 0;

while (j < arr.length) {
  if (arr[j].id === value) {
    result3 = arr[j];
    break;
  }
  j++;
}
console.log('result3', result3); // {id: 2, name: 'Bell'}