findindex js
const array1 = [5, 12, 8, 130, 44];
const findLargeNumber = element => element > 13;
console.log(array1.findIndex(findLargeNumber));
// expected output: 3
const array2 = [{id:1, dev:false}, {id:2, dev:false}, {id:3, dev:true}];
const WheresTheDev = obj => obj.dev === true;
console.log(array2.findIndex(WheresTheDev));
// expected output: 2
// findIndex(callback fn)
// .... return index (when condition meets)
// .... return -1 (if condition not meets)
const array = [5, 12, 8, 130, 44];
/// it returns the index of number which satisfy the condition true
const index = array.findIndex((item)=> item>10); //1
/// now we can check what element at that index...
console.log(array[index]); // array[1]
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
//*** Thanks to MDN Web Docs ***//
//https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/Array/indexOf