Answers for "js indexof array"

2

js indexof regex

//regular indexof
let a = 'asbdais sbbdias isajdij';
a.indexOf('ias');
// with regex:
let a = 'asbdais sbbdias isajdij';
a.search(/ias/g);
Posted by: Guest on August-28-2020
2

index of value in array

// for dictionary case use findIndex 
var imageList = [
   {value: 100},
   {value: 200},
   {value: 300},
   {value: 400},
   {value: 500}
];
var index = imageList.findIndex(img => img.value === 200);
Posted by: Guest on June-27-2020
5

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
Posted by: Guest on October-28-2020
5

js array get index

var fruits = ["Banana", "Orange", "Apple", "Mango"];
return fruits.indexOf("Apple"); // Returns 2
Posted by: Guest on July-02-2020
4

javasript array indexof

var array = [2, 9, 9];
array.indexOf(2);     // 0
array.indexOf(7);     // -1
array.indexOf(9, 2);  // 2
array.indexOf(2, -1); // -1
array.indexOf(2, -3); // 0
Posted by: Guest on June-12-2020
3

JavaScript Array Methods indexOf()

let days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday'];
console.log(days.indexOf('Sunday'));
// --> -1, mert nem található meg

let days = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday'];
console.log(days.indexOf('Monday'));
// --> 0
Posted by: Guest on May-07-2021

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