getData function after modifications to read headers from properties on our model

gistfile1.js

model.getData = function () {
    var skip = model.pageSize() * (model.currentPage() - 1);
    $.get("/api/values?$top=" + model.pageSize() + "&$skip=" + skip + "&$inlinecount=allpages", function (data) {
        model.count(data.Count);
        model.records(data.Results);

        // If we have a valid results set, iterate over each property in the first row to get headers
        if (data.Results && data.Results.length > 0) {
            for (prop in data.Results[0]) {
                if (data.Results[0].hasOwnProperty(prop)) {
                    model.headings.push(prop);
                }
            }
        }
    });
};