find index of value array javascript code example
Example 1: javascript get index of object with value in array
const needle = 3;
const haystack = [{ id: 1 }, { id: 2 }, { id: 3 }];
const index = haystack.findIndex(item => item.id === needle);
Example 2: javascript findindex
const array1 = [5, 12, 8, 130, 44];
const search = element => element > 13;
console.log(array1.findIndex(search));
const array2 = [
{ id: 1, dev: false },
{ id: 2, dev: false },
{ id: 3, dev: true }
];
const search = obj => obj.dev === true;
console.log(array2.findIndex(search));
Example 3: access index of array javascript
let first = fruits[0]
let last = fruits[fruits.length - 1]