JQuery年间隔

Question

我从localhost网址获取数据。我有一个名为“DateRequest”的变量。我只想在1900年到2030年间为这个变量花费数年时间。我写了这样的代码，但它不起作用。我该如何解决？

 <script type="text/javascript">
        document.body.style.backgroundColor = "#6e7b8b";

        $.get("http://localhost:8080/request",
               function (data, status) {
                   var year = {}
                   var yearrequestnum = [];

                   $.each(data, function (index, item) {

                       var girisYear = null;
                       if (item.DateRequest != null && item.DateRequest.length > 4)
                       {
                           girisYear = item.DateRequest.substr(0, 4);

                           if (yil[girisYear] == null) {
                               yil[girisYear] = 0;
                           }
                           yil[girisYear]++;
                       }
                   });
                   console.log(yil);

                   $.each(year, function (index, item) {
                       console.log(parseInt(index, 0));
                       if (parseInt(index, 0) < 1900 && parseInt(index, 0) > 2030)
                           return;
                       newitem = {}
                       newitem["girisYili"] = index
                       newitem["sayi"] = item;
                       yearrequestnum.push(newitem);
                   });

                   console.log(yearrequestnum)

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