Question

请帮帮我，我有这样的angularJS代码：

.state('masterpegawai.alltalenta', {
            url: '/alltalenta',
            templateUrl: 'public/js/partial-masterpegawai-alltalenta.html',
            controller:function($scope,$http,$interval){
                    $http.get('http://10.16.107.77:3000/allhistorytalenta').success(function(data){

                        $scope.listtalentapegawai=data;

                    });
            }
        })

产生这样的JSON：

[{
    "nip": "6080022A",
    "nama": "ASLAN PURNAMA",
    "semester1_2012": null,
    "semester2_2012": null,
    "semester1_2013": null,
    "semester2_2013": null,
    "semester1_2014": null,
    "semester2_2014": "Potensial",
    "semester1_2015": null
}, {
    "nip": "6080022A",
    "nama": "ASLAN PURNAMA",
    "semester1_2012": null,
    "semester2_2012": null,
    "semester1_2013": null,
    "semester2_2013": null,
    "semester1_2014": null,
    "semester2_2014": null,
    "semester1_2015": "Potensial"
}, {
    "nip": "6080038A",
    "nama": "SYAIFUL ANWAR",
    "semester1_2012": null,
    "semester2_2012": null,
    "semester1_2013": null,
    "semester2_2013": null,
    "semester1_2014": null,
    "semester2_2014": "Potensial",
    "semester1_2015": null
}, {
    "nip": "6080038A",
    "nama": "SYAIFUL ANWAR",
    "semester1_2012": null,
    "semester2_2012": null,
    "semester1_2013": null,
    "semester2_2013": null,
    "semester1_2014": null,
    "semester2_2014": null,
    "semester1_2015": "Potensial"
}, {
    "nip": "6080048A",
    "nama": "NURHAYATI",
    "semester1_2012": null,
    "semester2_2012": null,
    "semester1_2013": "Potensial",
    "semester2_2013": null,
    "semester1_2014": null,
    "semester2_2014": null,
    "semester1_2015": null
}]

我想计算数组键，我的最终结果应该是9

因为每个数组包含9个键

"nip",
"nama",
"semester1_2012",
"semester2_2012",
"semester1_2013",
"semester2_2013",
"semester1_2014",
"semester2_2014",
"semester1_2015"

我是AngularJS的新手，并尝试使用长度方法，但结果总是大于9，因为它计算整个JSON

Answer 1

您可以使用Object.keys

功能

var length = 0;    

Object.keys(o).forEach(function(key) {
              var val = o[key];
             length = length + 1;

    });

o是任何对象。

在您的情况下，o应该是数组$scope.listtalentapegawai的任何对象。

如果你只想要Length，你可以这样做：

var length = Object.keys(o).length;

编辑：你的例子

.state('masterpegawai.alltalenta', {
            url: '/alltalenta',
            templateUrl: 'public/js/partial-masterpegawai-alltalenta.html',
            controller:function($scope,$http,$interval){
                    $http.get('http://10.16.107.77:3000/allhistorytalenta').success(function(data){

                        $scope.listtalentapegawai=data;

         var length = Object.keys($scope.listtalentapegawai[0]).length; // will be 9


                    });
            }
        })

AngularJS计数JSON数组

1 个答案:

编辑：你的例子