javascript - 我只想在列表中显示一次重复项并删除其他项

Question

我只想在列表中显示一次重复的元素，而那些不重复的元素想从列表中删除，正确的程序应该是什么？考虑以下功能:

{
    alert("Hello");
    var symptomname = $('#symptomname').val();

    $.getJSON('http://54.148.253.123/HHS_Service/HealthService.svc/DiseaseGetBySymptom', { SymptomName: symptomname }, function (data) {


        var tasks = $.parseJSON(data.d);
        alert(tasks);
        $.each(tasks, function (key, value) {

            $('<div data-role="collapsible" data-content-theme="a" data-collapsed="true"><h3>' + value.DiseaseName +
         '</h3><ul data-role="listview" id="search1ListView" data-inset="true" data-theme="a"><li><strong>Detail:</strong><span> '
          + value.Descr +
         '</span></li></ul></div>').appendTo('#foundDisease');

            // refreshing collapsible created dynamically "its necessary to refresh for a jQuery look and feel"
            $('div[data-role=collapsible]').collapsible({ theme: 'a', refresh: true });

            $("#clear").click(function () {
                $("#foundDisease").empty();
            });
        });

    });
}

Answer 1

尝试使用这样的东西:

 var tasks = $.parseJSON(data.d);
tasks=$.unique(tasks);// this should remove duplicate records.

然后你的循环开始。