Existing Column omission about jspdf-autotable HOT 18 CLOSED

var cols = ["Header 1", "Header 2", "Header 3"];
var data = [
    ["Row 1", "Row 1", "Row 1"],
    ["Row 1", "Row 1", "Row 1"],
    ["Row 1", "Row 1", "Row 1"]
];
var doc = new jsPDF('p', 'pt');
doc.autoTable(cols, data, {});
doc.save("table.pdf");

var json = doc.autoTableHtmlToJson(document.getElementById("basic-table"));
var cols = [], data = [];
for(var i = 0; i < json.length; i++)  {
    var row = json[i];
    var newRow = [];
    for (var key in row) {
        if (row.hasOwnProperty(key)) {
            if(i === 0) {
                cols.push(key);
            }
            newRow.push(row[key]);
        }
    }
    data.push(newRow);
});
doc.autoTable(cols, data, {startY: 60});
doc.save("table.pdf");

// Production steps of ECMA-262, Edition 5, 15.4.4.18
// Reference: http://es5.github.io/#x15.4.4.18
if (!Array.prototype.forEach) {

    Array.prototype.forEach = function(callback, thisArg) {

        var T, k;

        if (this == null) {
            throw new TypeError(' this is null or not defined');
        }

        // 1. Let O be the result of calling ToObject passing the |this| value as the argument.
        var O = Object(this);

        // 2. Let lenValue be the result of calling the Get internal method of O with the argument "length".
        // 3. Let len be ToUint32(lenValue).
        var len = O.length >>> 0;

        // 4. If IsCallable(callback) is false, throw a TypeError exception.
        // See: http://es5.github.com/#x9.11
        if (typeof callback !== "function") {
            throw new TypeError(callback + ' is not a function');
        }

        // 5. If thisArg was supplied, let T be thisArg; else let T be undefined.
        if (arguments.length > 1) {
            T = thisArg;
        }

        // 6. Let k be 0
        k = 0;

        // 7. Repeat, while k < len
        while (k < len) {

            var kValue;

            // a. Let Pk be ToString(k).
            //   This is implicit for LHS operands of the in operator
            // b. Let kPresent be the result of calling the HasProperty internal method of O with argument Pk.
            //   This step can be combined with c
            // c. If kPresent is true, then
            if (k in O) {

                // i. Let kValue be the result of calling the Get internal method of O with argument Pk.
                kValue = O[k];

                // ii. Call the Call internal method of callback with T as the this value and
                // argument list containing kValue, k, and O.
                callback.call(T, kValue, k, O);
            }
            // d. Increase k by 1.
            k++;
        }
        // 8. return undefined
    };
}

$(document).on("click", "#PDF", function () {
    var table = document.getElementById("result");
    var doc = new jsPDF('p', 'pt');
     var json = doc.autoTable(false, doc.autoTableHtmlToJson(table));
     console.log(JSON.stringify(json));
     var new_json = JSON.stringify(json);
     var cols = [], data = [];
     //json.forEach(function(row, index) {
     [].forEach.call(new_json, function(row,index) {
         var newRow = [];
         for (var key in row) {
             if (row.hasOwnProperty(key)) {
                 if(index === 0) {
                     cols.push(key);
                 }
                 newRow.push(row[key]);
             }
         }
         data.push(newRow);
     });
     doc.autoTable(cols, data, {startY: 60});
     doc.save("table.pdf");
});

        var columns = [
                       { title: "Industrial zone", key: "indzone" },
                       { title: "District", key: "dstr" },
                       { title: "Taluk", key: "tlk" },
                       { title: "ContactTitle", key: "vlg" },
                       { title: "Industrial area", key: "nmindar" },
                       { title: "Plot No", key: "plno" },
                       { title: "Plot area", key: "pltar" },
                       { title: "Name of allottee", key: "nmalt" },
                       { title: "Address of allottee", key: "addalt" },
                       { title: "Nature of industry", key: "ntrind" },
                       { title: "Reservation", key: "rsvr" },
                       { title: "Index", key: "indx" },
                       { title: "Plot status", key: "plst" },
                       { title: "Implimentation status", key: "implst" },
                       { title: "Date of possession", key: "dtpss" },
                       { title: "Date of allotment", key: "dtaltm" },
                       { title: "Due Date of payment", key: "ddtpmt" },
                       { title: "Date of Lease Agreement Executed", key: "dtleagrex" },
                       { title: "Stipulated time for commencement of production", key: "stcmprd" },
                       { title: "Extension of time Granted", key: "extgrt" },
                       { title: "Remarks", key: "remark" },
                       { title: "Updated Date", key: "plotupdateddate" }

        ];

         l = {
     format: 'a3',
     compress: true,
     fontSize: 8,
     autoSize: false,
     printHeaders: true
 };
         var doc = new jsPDF(l, '', '');
        doc.autoTable(columns, data, {
            styles: {
              columnWidth:'auto'
    }
        });
        doc.save('Statusreport.pdf');
    }

});