如何对存储在 Javascript 变量中的字典列表中的两个值求和？

Question

I created this JS variable from a JSON:

var myJSON = [
  {
    "": 0,
    "Comune": "BONDENO",
    "PUNTEGGIOSCUOLA1516": 4.25,
    "Value 1": 63,
    "Value 2": 8,
    "Value 3": 17,
    "DANNO": 6,
    "Somma valori": 88,

  },
  {
    "": 1,
    "Comune": "CAVEZZO",
    "PUNTEGGIOSCUOLA1516": 3.75,
    "Value 1": 23,
    "Value 2": 2,
    "Value 3": 9,
    "DANNO": 8,
    "Somma valori": 34,

  }, etc.

I want to sum Value 1 and Value 2 in each dictionary, so that it would become:

sum = [71, 25, etc.]

Each of these points would then have to be divided for "DANNO", and the result should be an array because I would have to plot it afterwards. I looked many answers but none answered my doubts.

Answer 1

I think it would help to make a function that returns this array by iterating over the objects and performing said operations. Here's a possible solution:

 var myJSON = [ { "": 0, "Comune": "BONDENO", "PUNTEGGIOSCUOLA1516": 4.25, "Value 1": 63, "Value 2": 8, "Value 3": 17, "DANNO": 6, "Somma valori": 88, }, { "": 1, "Comune": "CAVEZZO", "PUNTEGGIOSCUOLA1516": 3.75, "Value 1": 23, "Value 2": 2, "Value 3": 9, "DANNO": 8, "Somma valori": 34, }]; const createPlotArray = (data) => { let returnArray = data.map(item => (item["Value 1"] + item["Value 2"])/item["DANNO"] ); return returnArray; }; document.querySelector("#root").innerHTML = createPlotArray(myJSON);

 <div id="root"></div>