0 
[
   {
      "ProductId": 177,
      "Quantity": 3,
      "Price": 1,
      "OriginalPrice": 1,
      "OriginalPricetotal": 3,
      "SoldPrice": 1,
      "ProductName": "Hand Spinners"
   },
   {
      "ProductId": 30207,
      "Quantity": 2,
      "Price": 525,
      "OriginalPrice": 525,
      "OriginalPricetotal": 1050,
      "SoldPrice": 525,
      "ProductName": "Clay Home"
   }
]

I want to calculate sum of all 'OriginalPricetotal' in an array using javascript / Jquery. I tried few types . But that is not working .

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4
  • 2
    I tried few types - Please share your attempt. Commented Apr 13, 2018 at 6:54
  • 1
    hint: map + reduce Commented Apr 13, 2018 at 6:55
  • 2
    I think simple reduce will do Commented Apr 13, 2018 at 6:56
  • sure, but with map it's sexier and shorter :p Commented Apr 13, 2018 at 6:57

2 Answers 2

Reset to default
3

Please see below snippet which will return you the answer you want

var obj = [
   {
      "ProductId": 177,
      "Quantity": 3,
      "Price": 1,
      "OriginalPrice": 1,
      "OriginalPricetotal": 3,
      "SoldPrice": 1,
      "ProductName": "Hand Spinners"
   },
   {
      "ProductId": 30207,
      "Quantity": 2,
      "Price": 525,
      "OriginalPrice": 525,
      "OriginalPricetotal": 1050,
      "SoldPrice": 525,
      "ProductName": "Clay Home"
   }
];

var ans = 0;
// Better option
obj.forEach(function(value){
 ans = ans + value.OriginalPricetotal
});
console.log(ans);

ans = 0;
//obj.map(o => ans = ans + o.OriginalPricetotal); //ES6
obj.map(function(value){
 ans = ans + value.OriginalPricetotal
});
console.log(ans);

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3 Comments

.map without a return statement and assignment of final value is just a bad implementation. Please use .forEach instead. Also, though this is opinionated comment, answering a question without effort promotes spoon feeding
@Rajesh Thanks. Ya forEach is better option. Let me add it in my answer too.
Still, .map implementation is wrong
0

You just need to loop through the array and get the value of OriginalPricetotal to add and get the sum. Since, the value is already a number and not a string, you do not need parseInt() to parse the values before addition:

USING forEach()

var arr = [
   {
      "ProductId": 177,
      "Quantity": 3,
      "Price": 1,
      "OriginalPrice": 1,
      "OriginalPricetotal": 3,
      "SoldPrice": 1,
      "ProductName": "Hand Spinners"
   },
   {
      "ProductId": 30207,
      "Quantity": 2,
      "Price": 525,
      "OriginalPrice": 525,
      "OriginalPricetotal": 1050,
      "SoldPrice": 525,
      "ProductName": "Clay Home"
   }
];

var sum = 0;
arr.forEach(function(obj){
  sum += obj.OriginalPricetotal;
});

console.log(sum);

USING map()

var arr = [
   {
      "ProductId": 177,
      "Quantity": 3,
      "Price": 1,
      "OriginalPrice": 1,
      "OriginalPricetotal": 3,
      "SoldPrice": 1,
      "ProductName": "Hand Spinners"
   },
   {
      "ProductId": 30207,
      "Quantity": 2,
      "Price": 525,
      "OriginalPrice": 525,
      "OriginalPricetotal": 1050,
      "SoldPrice": 525,
      "ProductName": "Clay Home"
   }
];

var sum = 0;
arr.map((obj)=>{sum += obj.OriginalPricetotal});

console.log(sum);

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2 Comments

Should we not close this post as dupe instead?
Also, .map implementation is just wrong

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