Answer to Question #171165 in HTML/JavaScript Web Application for srikanth

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);