Convert an Array To a Nested JSON

Question

I am struggling the last days with an unresolved problem for me. I am stuck on this problem for long time that's why I took the decision to ask for your help.

I'm reading an Excel file and got the following array which I am now trying to convert it to a nested JSON to get accepted from the mongoDB but unfortunately I have difficulties to get there.

var arr = ["number,isnewLanguage,label,numberOfChoices,languages/language,questions/mainText/language,questions/subText/language,questions/choices/language,questions/fields/langugage",
  "1,false,label1,5,English,MAinText1,SubText1,choices1,false",
  "2,false,label2,5,English,MAinText2,SubText2,choices2,false",
  "3,true,label1,false,Italian,MainTextItalian1,SubTextItalian1,choicesItalian1,false",
  "4,true,label2,false,Italian,MAinTextItalian2,SubTextItalian2,choicesItalian2,false"
]

I would like to end up with the following structure. Here is a fiddle with my work https://jsfiddle.net/argusDob/3py6fd8m/2/

var json = [{
    number: 1,
    label1: "label1",
    numberOfChoices: 5,
    languages: [{
        language: "English",
        questions: [{
          mainText: "MainText1",
          subText: "subText1",
          choices: "choices1",
          fields: "false"
        }]
      },
      {
        language: "Italian",
        questions: [{
          mainText: "MainTextItalian1",
          subText: "subTextItlaian1",
          choices: "choicesItalian1",
          fields: "false"
        }]
      }
    ]
  },
  {
    number: 2,
    label1: "label2",
    numberOfChoices: 5,
    languages: [{
        language: "English",
        questions: [{
          mainText: "MainText2",
          subText: "subText2",
          choices: "choices2",
          fields: "false"
        }]
      },
      {
        language: "Italian",
        questions: [{
          mainText: "MainTextItalian2",
          subText: "subTextItlaian2",
          choices: "choicesItalian2",
          fields: "false"
        }]
      }
    ]
  }
]

 var arr = ["number,isnewLanguage,label,numberOfChoices,languages/language,questions/mainText/language,questions/subText/language,questions/choices/language,questions/fields/langugage", "1,false,label1,5,English,MAinText1,SubText1,choices1,false", "2,false,label2,5,English,MAinText2,SubText2,choices2,false", "3,true,label1,false,Italian,MainTextItalian1,SubTextItalian1,choicesItalian1,false", "4,true,label2,false,Italian,MAinTextItalian2,SubTextItalian2,choicesItalian2,false" ] var attrs = arr.splice(0, 1); var test = []; var result = arr.map(function(row, idx) { var myObj = {}; var array = []; var therows = row.split(",").slice(1); console.log(therows[0]); therows.forEach(function(value, i) { var myKeys = attrs[0].split(",").slice(1) var theKeys = myKeys[i] if (theKeys.split('/').length === 1) { myObj[theKeys] = value; } //languages var theLanguagesKey = theKeys.split("/")[0] if (theKeys.split("/").length == 2) { if (!myObj["languages"]) { var theNewLanguage = {} myObj["languages"] = []; theNewLanguage[theKeys.split('/')[1]] = value; myObj["languages"].push(theNewLanguage); } } //questions if (theKeys.split("/").length == 3) { if (!myObj["questions"]) { var theNewQuestions = {} myObj["questions"] = []; theNewQuestions[theKeys.split('/')[1]] = value; myObj["questions"].push(theNewQuestions); } else { for (var i = 0; i < myObj["questions"].length; i++) { myObj["questions"][i][theKeys.split('/')[1]] = value; } } } }) test.push(myObj) }) console.log(test)

Answer 1

If you don't want to reinvent the wheel, check fast-csv . It has pretty good options for what you need. If your headers are at the first row, you can pass headers to true to convert the object that can accept by mongodb. Here is the example