按键名过滤JSON数据

Question

我是angularJS的新手

我有这样的JSON数据：

[
{
    "REPORT_ID": "QDP56DSC4BK",
    "REPORT_NAME": "non, lobortis quis, pede.",
    "REPORT_STATUS": 1,
    "REPORT_TYPE": "Duis Sit Amet Ltd",
    "REPORT_DATE": "Sep 3, 2015",
    "REPORT_INGREDIENT_1": "Prednisone",
    "REPORT_INGREDIENT_2": "Alprazolam",
    "REPORT_INGREDIENT_3": "Prednisone",        

},
{
    "REPORT_ID": "JQY45UOQ8PY",
    "REPORT_NAME": "Cras dolor dolor, tempus",
    "REPORT_STATUS": 4,
    "REPORT_TYPE": "Sociis Incorporated",
    "REPORT_DATE": "Apr 26, 2015",
    "REPORT_INGREDIENT_1": "Clonazepam",
    "REPORT_INGREDIENT_2": "Hydrocodone/APAP",
    "REPORT_INGREDIENT_3": "Nuvaring",      
},
{
    "REPORT_ID": "EDE42OUH3FM",
    "REPORT_NAME": "posuere cubilia Curae; Donec",
    "REPORT_STATUS": 5,
    "REPORT_TYPE": "Pede Inc.",
    "REPORT_DATE": "May 22, 2015",
    "REPORT_INGREDIENT_1": "Furosemide",
    "REPORT_INGREDIENT_2": "Lipitor",
    "REPORT_INGREDIENT_3": "Losartan Potassium",

},
{
    "REPORT_ID": "BWQ55EIS6LS",
    "REPORT_NAME": "enim. Nunc ut erat.",
    "REPORT_STATUS": 1,
    "REPORT_TYPE": "Orci Sem Institute",
    "REPORT_DATE": "Dec 29, 2015",
    "REPORT_INGREDIENT_1": "Alprazolam",
    "REPORT_INGREDIENT_2": "Celebrex",
    "REPORT_INGREDIENT_3": "Promethazine HCl",
}
]

如何过滤此数据并将所有“ REPORT_STATUS”数据存储在单独的数组中。

我的数组应包含：[“ REPORT_STATUS”：1，“ REPORT_STATUS”：4，4，“ REPORT_STATUS”：5，“ REPORT_STATUS”：1]

Answer 1

让我们玩一些内置的功能 ：

console.log(JSON.stringify(json, ['REPORT_STATUS']));

将产生

[{"REPORT_STATUS":1},{"REPORT_STATUS":4},{"REPORT_STATUS":5},{"REPORT_STATUS":1}]

Answer 2

var reportStatuses = [];
angular.forEach(myJson, function(jsonObj) {
    reportStatuses.push(jsonObj.REPORT_STATUS);
});

这样，您将拥有一个包含所有reportstatus的数组，如下所示：

[1,2,4,6,7]

不可能有一个包含键值对的数组，为此使用一个对象。

Answer 3

尝试这个

 values = your_json_array;
    var status = [];
    angular.forEach(values, function(value, key) {
      this.push(value.REPORT_STATUS);
    }, status);

REPORT_STATUS将在状态变量中存储输出status = [1,4,5,1]

有关更多信息， 请参见https://docs.angularjs.org/api/ng/function/angular.forEach

Answer 4

单行版本

var reportStatusArray = yourJsonArray.map(function(r){ return r['REPORT_STATUS']; });

这会给你[1,2,3,4,5]

或者：

var reportStatusArray = yourJsonArray.map(function(r){ return {'REPORT_STATUS': r['REPORT_STATUS']}; });

会给您[{"REPORT_STATUS": 1},{"REPORT_STATUS": 2} ... ]