how to sum data array in javascript

Question

i have data from json this data json

var someObject = {
 "exam": 
 [
   {
     "re": [[{"result": "3"}],[{"result": "1"}],[{"result": "2"}]]
   },
   {
     "re": [[{"result": "4"}],[{"result": "4"}],[{"result": "4"}]]
   }
   ,
   {
     "re": [[{"result": "2"}],[{"result": "1"}],[{"result": "3"}]]
   }
 ]
};

and the problem is how to sum the result?

and I've tried in code like this

for (var i = 0; i<someObject.exam.length; i++){
    for (var y = 0; y < someObject.exam[i].re.length; y++){

         $scope.RESS = parseInt(someObject.exam[i].re[y][0].result) +
                       parseInt(someObject.exam[i].re[y][0].result) 
  }
}

why the results not same like

 3 + 4 + 2; // 9
 1 + 4 + 1; // 6
 2 + 4 + 3; // 9

this xample from plunk xamplle

I've spent 2 days for something like this, and now I'm tired help me pleasse

you want the output as above?

Sajeetharan
– Sajeetharan

2017-11-16 16:13:16 +00:00
Commented Nov 16, 2017 at 16:13 — Sajeetharan
– Sajeetharan, Commented Nov 16, 2017 at 16:13
@Sajeetharan yes how, can help me

Adriyana Putra Pratama
– Adriyana Putra Pratama

2017-11-16 16:15:38 +00:00
Commented Nov 16, 2017 at 16:15 — Adriyana Putra Pratama
– Adriyana Putra Pratama, Commented Nov 16, 2017 at 16:15

cнŝdk · Accepted Answer · 2017-11-16 16:22:40Z

2

This is how you should calculate it:

someObject.exam[0].re.forEach(function(o, i) {
  results.push(parseInt(someObject.exam[0].re[i][0].result) + parseInt(someObject.exam[1].re[i][0].result) + parseInt(someObject.exam[2].re[i][0].result));
});

Demo:

var someObject = {
  "exam": [{
      "re": [
        [{
          "result": "3"
        }],
        [{
          "result": "1"
        }],
        [{
          "result": "2"
        }]
      ]
    },
    {
      "re": [
        [{
          "result": "4"
        }],
        [{
          "result": "4"
        }],
        [{
          "result": "4"
        }]
      ]
    },
    {
      "re": [
        [{
          "result": "2"
        }],
        [{
          "result": "1"
        }],
        [{
          "result": "3"
        }]
      ]
    }
  ]
};

var results = [];

someObject.exam[0].re.forEach(function(o, i) {
  results.push(parseInt(someObject.exam[0].re[i][0].result) + parseInt(someObject.exam[1].re[i][0].result) + parseInt(someObject.exam[2].re[i][0].result));
});
console.log(results);

answered Nov 16, 2017 at 16:22

cнŝdk

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2 Comments

Adriyana Putra Pratama Over a year ago

what the hell is this man, you know 2 days i'm stuck with this code and you finish it in a few minutes, niceeee you save my day, I really thanks to you

cнŝdk Over a year ago

@AdriyanaPutraPratama Hhhhh you are welcome, It just needs some practice and you will be able to perform better :)

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