javascript - 如何计算5个学生的平均分，并在datatable.js中实现，该怎么做？

Question

这是我的 json 数据

var myList = [
    [1, "Karthick", 90, 95, 85, 95, 100,],
    [2, "Ram", 98, 90, 95, 95, 100],
    [3, "Suthan", 80, 90, 85, 100, 95],
    [4, "Ganesh", 90, 100, 100, 99, 96],
    [5, "Thilak", 98, 99, 99, 100, 100],
    [6, "Mari",90, 100, 100, 99, 100]
]; 

$(document).ready(function() {
    $('#demo').html( '<table cellpadding="0" cellspacing="0" border="0" class="display" id="example"></table>' ); 
    $('#example').dataTable( {
        "data": myList,
        "columns": [
            { "title": "Id" },
            { "title": "Name" },
            { "title": "Mark1" },
            { "title": "Mark2"},
            { "title": "Mark3"},
            { "title": "Mark4"},
            { "title": "Mark5"},
            { "title": "Average"},
            { "title": "Grade"}
        ]
    });   
});

我将这些 json 数据发送到 datatable.js，但我的疑问是如何计算 5 个分数的平均值并使用 datatable.js 在数据表中显示平均分数

Answer 1

这是解决方案。

var myList = [
    [1, "Karthick", 90, 95, 85, 95, 100,],
    [2, "Ram", 98, 90, 95, 95, 100],
    [3, "Suthan", 80, 90, 85, 100, 95],
    [4, "Ganesh", 90, 100, 100, 99, 96],
    [5, "Thilak", 98, 99, 99, 100, 100],
    [6, "Mari",90, 100, 100, 99, 100]
]; 

   function avg( ){
    var i, av = 0;
    for (i = 2, len = this.length ; i < len; i++)
    {
        if(!isNaN(this[i]))
        av += this[i];
    }
    return av;
}
Array.prototype.avg = avg; 

    myList.map(function(array){
    array[array.length-1] = array.avg();
          return array;
    });