從對象數組中刪除一個屬性

Question

我想從對象數組中刪除一個屬性

"[{"name":"vv","age":"12","id":"123"},{"name":"v2","age":"13","id":"123"},{"name":"v3","age":"123","id":"124"}]"  

我想從數組中刪除年齡屬性我的輸出應該是

[{"name":"vv","id":"123"},{"name":"v2","id":"123"},{"name":"v3","id":"124"}]" 

Answer 1

您可以使用array.map ， destructuring和rest ：

 var arr = [{"name":"vv","age":"12","id":"123"},{"name":"v2","age":"13","id":"123"},{"name":"v3","age":"123","id":"124"}]; arr = arr.map(({ age, ...rest}) => rest); console.log(arr); 

Answer 2

如果您想更新現有陣列（請使用delete ）

 var arr = [{"name":"vv","age":"12","id":"123"},{"name":"v2","age":"13","id":"123"},{"name":"v3","age":"123","id":"124"}]; arr.forEach((item) => delete item.age); console.log(arr); 

如果您要創建新的數組（使用Array.map ）

 var arr = [{"name":"vv","age":"12","id":"123"},{"name":"v2","age":"13","id":"123"},{"name":"v3","age":"123","id":"124"}]; var arr1 = arr.map(({ age, ...obj}) => obj); console.log(arr1); // updated console.log(arr); // no change 

Answer 3

var arr='[{"name":"vv","age":"12","id":"123"},{"name":"v2","age":"13","id":"123"},{"name":"v3","age":"123","id":"124"}]';

var JSON_ARRAY= JSON.parse(arr);

JSON_ARRAY.forEach( function (arrayItem)
 {
     delete arrayItem.age;
 });

Answer 4

您可以使用Reflect.deleteProperty刪除屬性。

 var array = [{ name: "vv", age: "12", id: "123" }, { name: "v2", age: "13", id: "123" }, { name: "v3", age: "123", id: "124" }]; array.forEach(o => Reflect.deleteProperty(o, 'age')); console.log(array); 

Answer 5

嘗試這個 ：

 var jsonString = '[{"name":"vv","age":"12","id":"123"},{"name":"v2","age":"13","id":"123"},{"name":"v3","age":"123","id":"124"}]'; var jsonObj = JSON.parse(jsonString); jsonObj.map(obj => { delete obj.age; return obj; }); console.log(jsonObj);