按鍵名過濾JSON數據

Question

我是angularJS的新手

我有這樣的JSON數據：

[
{
    "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",
}
]

如何過濾此數據並將所有“ REPORT_STATUS”數據存儲在單獨的數組中。

我的數組應包含：[“ REPORT_STATUS”：1，“ REPORT_STATUS”：4，4，“ REPORT_STATUS”：5，“ REPORT_STATUS”：1]

Answer 1

讓我們玩一些內置的功能 ：

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

將產生

[{"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);
});

這樣，您將擁有一個包含所有reportstatus的數組，如下所示：

[1,2,4,6,7]

不可能有一個包含鍵值對的數組，為此使用一個對象。

Answer 3

嘗試這個

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

REPORT_STATUS將在狀態變量中存儲輸出status = [1,4,5,1]

有關更多信息， 請參見https://docs.angularjs.org/api/ng/function/angular.forEach

Answer 4

單行版本

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

這會給你[1,2,3,4,5]

或者：

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

會給您[{"REPORT_STATUS": 1},{"REPORT_STATUS": 2} ... ]