JAVASCRIPT

get index of item array

const array = ['a', 'b', 'c']
array.indexOf('a')
 > 0

get index of element in array js

const beasts = ['ant', 'bison', 'camel', 'duck', 'bison'];

beasts.indexOf('bison'); //ouput: 1

// start from index 2
beasts.indexOf('bison', 2); //output: 4

beasts.indexOf('giraffe'); //output: -1

find index in array javascript

// find index of array in javascript
const number = [1,6,2,8,1,0,4,2,7,5,4,1];
const index = number.findIndex(item => item === 8);
console.log(index)

js array get index

var fruits = ["Banana", "Orange", "Apple", "Mango"];
return fruits.indexOf("Apple"); // Returns 2

js get index of item in array

array.indexOf("item");

js array index

const beasts = ['ant', 'bison', 'camel', 'duck', 'bison'];

console.log(beasts.indexOf('bison'));
// expected output: 1

// start from index 2
console.log(beasts.indexOf('bison', 2));
// expected output: 4

console.log(beasts.indexOf('giraffe'));
// expected output: -1

javascript find index

const index = array.findIndex((param)=> param.name == "jimmy")
/* param will iterate on every value of the array looking for 
that one element that fits the criteria that is indicated in arrow function 
besides it */

access index of array javascript

let first = fruits[0]
// Apple

let last = fruits[fruits.length - 1]
// Banana

array index javascript

let fruits = ['Apple', 'Banana']
let first = fruits[0]
// Apple

let last = fruits[fruits.length - 1]
// Banana