finding-objects-and-values-in-arrays-part-1

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

let namesArray = ['Adam', 'Bell', 'Cody', 'Dawn'];
let textArray = ['Dog', 'Cat', 'Horse', 'Cow'];
let numbersArray = [1, 2, 3, 4];

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

let arr = ['Adam', 'Bell', 'Cody', 'Adam', 'Dawn'];
let value = 'Adam';

// Array.indexOf()
let index1 = arr.indexOf(value); // 1 (first occurrence of value in the array)
console.log(arr[index1]); // 'Adam'

// Array.find()
let index2 = arr.find(x => x === value); // 1
console.log(arr[index2]); // 'Adam'

// Array.includes()
let exists = arr.includes(value); // true

finding-objects-and-values-in-arrays-part-1-3.js

let arr = ['Adam', 'Bell', 'Cody', 'Adam', 'Dawn'];
let value = 'Adam';

// Array.lastIndexOf()
let index1 = arr.lastIndexOf(value); // 3 (last occurrence of value in the array)
console.log(arr[index1]); // 'Adam'

// Array.findIndex()
let index2 = arr.findIndex(x => x === value); // 1
console.log(arr[index2]); // 'Adam'

finding-objects-and-values-in-arrays-part-1-4.js

// for loop
let arr = ['Adam', 'Bell', 'Cody', 'Adam', 'Dawn'];
let value = 'Adam';

let result = null;

for(let i = 0; i < arr.length; i++) {
    if(i === val) {
      result = i;
      break; // We are looking for the first occurrence of value;
    };
};
console.log(result); // 'Adam'

finding-objects-and-values-in-arrays-part-1-5.js

// while loop
let arr = ['Adam', 'Bell', 'Cody', 'Adam', 'Dawn'];
let value = 'Adam';

let result = null;
let j = 0;

while (j < arr.length) {
  if (j === val) {
    result = j;
    break;
  }
  j = j + 1;
}
console.log(result); // 'Adam'