How convert a JSON format to another using Javascript?

Question

Iam implementing datepicker using Oracle JET.The JET cookbook provides me sample Datapicker that has JSON file as below.

 "Holidays": {
  "*": {
     "1": {
        "14": {
           "className": "holiday"

        },
        "26": {
           "className": "holiday"

        }
     }
   }

And Json file I get from my rest services is as below

 [
 {
     "YEAR":"2017",
     "MONTH":"1",
     "DAY":[
     {
         "N_DAYS":"25",
         "className":"holiday"
     },
     {
         "N_DAYS":"25",
         "className":"holiday"
     }
 ]

      },
  ];

How I can convert JSON file I get from the rest services like above one provided in JET cookbook

Answer 1

myStuff = [
  {
     "YEAR":"2017",
     "MONTH":"1",
     "DAY":[
       {
           "N_DAYS":"14",
           "className":"holiday"
       },
       {
           "N_DAYS":"26",
           "className":"holiday"
       }
    ]
  },
];

Holidays = {
  '*': { }
}

for (var i = 0; i < myStuff.length; i++) {
  var month = myStuff[i].MONTH;
  for (var j = 0; j < myStuff[i].DAY.length; j++) {
    if (typeof Holidays['*'][myStuff[i].MONTH] == 'undefined') {
      Holidays['*'][month] = {};
    }
    
    Holidays['*'][myStuff[i].MONTH][myStuff[i].DAY[j].N_DAYS] = {
      className: myStuff[i].DAY[j].className
    }
  }
}

Holidays = { Holidays: Holidays }
console.log(Holidays);