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Reputation: 43

Finding product of values in Javascript

Write a function called productOfValues which takes in an object of key/value pairs and multiplies the values together. You can assume that all keys are strings and all values are integers.

For example:

let testObject = {
  'a': 5, 
  'b': 12,
  'c': 3
}

productOfValues(testObject)

So, this is what I wrote:

let testObject = {
  'a': 5,
  'b': 12,
  'c': 3,
  'd': 1
}
let testObject_v = {
  'z': 2,
  'y': 2,
  'x': 2,
  'w': 2
}

function productOfValues(someObject) {
  return someObject.a * someObject.b * someObject.c;
}

function productOfValues(testObject) {
  return testObject_v.z * testObject_v.y * testObject_v.x * testObject_v.w;
}

console.log(productOfValues(testObject))
console.log(productOfValues(testObject_v))

And I've got an error of:

Your productOfValues function should return the product of the values in the given object: 180

Upvotes: 1

Views: 1491

Answers (2)

thingEvery
thingEvery

Reputation: 3434

You're defining the same function twice and you're only multiplying the first 3 numbers in the first object. Instead, rewrite your productOfValues() function to be something like this:

let testObject = {
  'a': 5,
  'b': 12,
  'c': 3,
  'd': 1
}
let testObject_v = {
  'z': 2,
  'y': 2,
  'x': 2,
  'w': 2
}

function productOfValues(someObject) {
  let product = 1;
  for (const i in someObject) {
    product = product * someObject[i];
  }
  return product;
}

console.log(productOfValues(testObject))
console.log(productOfValues(testObject_v))

Edit: Alternative productOfValues() function:

function productOfValues(someObject) {
  var result = 1; 
  var len = Object.keys(someObject).length; 
  for (var i = 0; i < len; i++) {     
    result = result * someObject[Object.keys(someObject)[i]]; 
  }
  return result;
}

Upvotes: 1

Sarfraaz talat
Sarfraaz talat

Reputation: 635

You can use Object.values to convert your object to array of its values & then use reduce to get the product of that values array

let testObject = {'a': 5,'b': 12,'c': 3, 'd':1};
let testObject_v = { 'z':2,'y':2,'x':2,'w':2 }

function productOfValues(someObject) {
  return Object.values(someObject).reduce((a,b)=> a*b ,1);
}

console.log(productOfValues(testObject));
console.log(productOfValues(testObject_v));

Upvotes: 4

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