Grouping product berdasarkan kategori

PopulateProduct.js

  var _jsn = [{
      "nominal": "0",
      "price": "0",
      "product_code": "BPJSKS",
      "product_name": "BPJS Kesehatan",
      "product_category": "BPJS"
  }, {
      "nominal": "5000",
      "price": "5050",
      "product_code": "SN5",
      "product_name": "Telkomsel Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "10000",
      "price": "10050",
      "product_code": "SN10",
      "product_name": "Telkomsel Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "20000",
      "price": "20050",
      "product_code": "SN20",
      "product_name": "Telkomsel Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "25000",
      "price": "25050",
      "product_code": "SN25",
      "product_name": "Telkomsel Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "50000",
      "price": "50050",
      "product_code": "SN50",
      "product_name": "Telkomsel Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "100000",
      "price": "100050",
      "product_code": "SN100",
      "product_name": "Telkomsel Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "5000",
      "price": "5050",
      "product_code": "ISN5",
      "product_name": "Indosat Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "10000",
      "price": "10050",
      "product_code": "ISN10",
      "product_name": "Indosat Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "25000",
      "price": "25050",
      "product_code": "ISN25",
      "product_name": "Indosat Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "50000",
      "price": "50050",
      "product_code": "ISN50",
      "product_name": "Indosat Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "100000",
      "price": "100050",
      "product_code": "ISN100",
      "product_name": "Indosat Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "5000",
      "price": "5050",
      "product_code": "X5",
      "product_name": "XL Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "10000",
      "price": "10050",
      "product_code": "X10",
      "product_name": "XL Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "25000",
      "price": "25050",
      "product_code": "X25",
      "product_name": "XL Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "50000",
      "price": "50050",
      "product_code": "X50",
      "product_name": "XL Nasional",
      "product_category": "PULSA"
  }, {
      "nominal": "100000",
      "price": "100050",
      "product_code": "X100",
      "product_name": "XL Nasional",
      "product_category": "PULSA"
  }];

    console.log(_jsn.length);
    //------------- get prod category
    var prods = [];
    var prodToCompare = "";
    for (var i =0; i < _jsn.length; i++){
        var firstCat = _jsn[i].product_category;
        if(firstCat != prodToCompare){
            prods.push(firstCat);
            prodToCompare = firstCat;
        }
    }
    console.log(prods);
    // add to main cat
    for(var i = 0; i < prods.length; i++){
        var rootProd = {};
        console.log("check "+prods[i]);
        rootProd.category = prods[i];
        var arrProd = [];
        for(var j = 0; j < _jsn.length; j++){
            if(_jsn[j].product_category == prods[i]){
                arrProd.push(_jsn[j]);
                rootProd.detail = arrProd;
            }
        }
        prods[i] = rootProd;
    }
    console.log(JSON.stringify(prods));
});