Answer to Question #171569 in HTML/JavaScript Web Application for sairam

Question

Trekking Kit

Given an object

trekkingKit in the prefilled code and item item as an input, write a JS program to add the method isKitContains to the constructor function Trekking using the prototype.

The method

isKitContains checks whether the trekkingKit contains the given item.

Quick Tip

The Object.getOwnPropertyNames() method gives an array containing the properties of the object.

Input

The input will be a single line containing a string

item

Output

The output should be a single line containing a boolean value

Sample Input 1

ruckSackBag

Sample Output 1

true

Sample Input 2

surfboard

Sample Output 2

false

Answer 1

function Trekking(item) {
    this.item = item;
}

const trekkingKit = {
    ruckSackBag: ['ruck', 'sack', 'bag'],
}

Trekking.prototype.isKitContains = function(obj) {
    return Object.getOwnPropertyNames(obj).some( item => item === this.item )
}

const trekking = new Trekking('ruckSackBag');
const restTrekking = trekking.isKitContains(trekkingKit);

console.log(restTrekking);