Javascript NG表的一个示例说明

有人可以解释这个例子

在HTML中，有-->

但是在js中没有为什么

$组

当指定

groupBy

ngtable参数（）时，定义$scope.$groups

---

这些组是通过指定

groupBy

ngtable参数来定义的，请参见我在执行console.log（$scope）时的原因；我没有看到$groups..？通过查看源代码，可以猜测，因为$groups是在承诺回调中设置的，所以在执行console.log（$scope）调用时，承诺可能尚未解析。

<tbody ng-repeat="group in $groups">

$scope.tableParams = new ngTableParams({
    page: 1,            // show first page
    count: 10          // count per page
}, {
    groupBy: 'role',   // << ----- grouping parameter
    total: data.length,
    getData: function($defer, params) {
        var orderedData = params.sorting() ?
                $filter('orderBy')(data, $scope.tableParams.orderBy()) :
                data;

        $defer.resolve(orderedData.slice((params.page() - 1) * params.count(), params.page() * params.count()));
    }
});

$scope.$groups = [
            {
                value: 'Administrator',
                data: [
                    {name: "Moroni", age: 50, role: 'Administrator'},
                    {name: "Tiancum", age: 43, role: 'Administrator'},
                    {name: "Jacob", age: 27, role: 'Administrator'}
                ]
            },
            {
                value: 'Moderator',
                data: [
                    {name: "Nephi", age: 29, role: 'Moderator'},
                    {name: "Nephi", age: 29, role: 'Moderator'},
                    {name: "Tiancum", age: 43, role: 'Moderator'},
                    {name: "Enos", age: 34, role: 'Moderator'}
                ]
            },
            {
                value: 'User',
                data: [
                    {name: "Enos", age: 34, role: 'User'},
                    {name: "Tiancum", age: 43, role: 'User'},
                    {name: "Jacob", age: 27, role: 'User'},
                    {name: "Enos", age: 34, role: 'User'},
                    {name: "Jacob", age: 27, role: 'User'},
                    {name: "Nephi", age: 29, role: 'User'},
                    {name: "Tiancum", age: 43, role: 'User'},
                    {name: "Jacob", age: 27, role: 'User'},
                    {name: "Nephi", age: 29, role: 'User'},
                    {name: "Enos", age: 34, role: 'User'}
                ]
            }
        ]