如何修改对象数组中的json对象

I have an array of object

我有一个对象数组

// This is should be taken from database
$scope.users = [{"$id":"1","UserID":3,"Name":"A","Selected":false},{"$id":"2","UserID":4,"Name":"B","Selected":false},{"$id":"3","UserID":5,"Name":"C","Selected":false},{"$id":"4","UserID":6,"Name":"D","Selected":false}]

Then there is an array that contains the selected users from previous screen

然后是一个包含上一屏幕中所选用户的数组

$scope.usersSelected = [{"$id":"3","UserID":5,"Name":"C","Selected":true,"$$hashKey":"object:83"},{"$id":"4","UserID":6,"Name":"D","Selected":true,"$$hashKey":"object:84"}]

I want to update the Selected properties of $scope.users if they are found in $scope.usersSelected. So I iterate the $scope.usersSelected then search its UserID in the UserID of $scope.users

我想更新$ scope.users的Selected属性，如果它们在$ scope.usersSelected中找到。所以我迭代$ scope.usersSelected，然后在$ scope.users的UserID中搜索其UserID

for (var i = 0; i < $scope.usersSelected.length; i++) {
    var obj = $.grep($scope.users, function (e) { return e.UserID == $scope.usersSelected[i].UserID; });
    obj.Selected = true;
}

but the Selected properties won't be updated. What's wrong with the code above?

但是不会更新Selected属性。上面的代码有什么问题？

Second, I need an explanation regarding the data in array above, why there is always "$id" when I populate the data from the database and also "$$hashKey" when I get the data from another screen? Where do these values come from?

其次，我需要一个关于上面数组中数据的解释，为什么当我从数据库填充数据时总是有“$ id”，当我从另一个屏幕获取数据时，还有“$$ hashKey”？这些价值来自哪里？

Notes: I'm using AngularJS with ASP.NET Web API 2 to get the data from database.

注意：我正在使用AngularJS和ASP.NET Web API 2从数据库中获取数据。

2 个解决方案

#1

tested working absolutely fine

测试工作绝对正常

 $scope.users = [ {
        "$id" : "1",
        "UserID" : 3,
        "Name" : "A",
        "Selected" : false
    }, {
        "$id" : "2",
        "UserID" : 4,
        "Name" : "B",
        "Selected" : false
    }, {
        "$id" : "3",
        "UserID" : 5,
        "Name" : "C",
        "Selected" : false
    }, {
        "$id" : "4",
        "UserID" : 6,
        "Name" : "D",
        "Selected" : false
    } ];

    $scope.usersSelected = [ {
        "$id" : "3",
        "UserID" : 5,
        "Name" : "C",
        "Selected" : true,
        "$$hashKey" : "object:83"
    }, {
        "$id" : "4",
        "UserID" : 6,
        "Name" : "D",
        "Selected" : true,
        "$$hashKey" : "object:84"
    } ]
    var users = $scope.users;
    var usersSelected = $scope.usersSelected;
    for (var i = 0; i < users.length; i++) {
        for (var j = 0; j < usersSelected.length; j++) {
            debugger
            if (users[i].UserID == usersSelected[j].UserID) {
                console.log(users[i].UserID)
                console.log(usersSelected[j].UserID)
                users[i].Selected = true;

            }
        }

    }

    console.log(users)
    console.log(usersSelected);

#2

tested with javascript.

用javascript测试。

usersSelected =  $scope.usersSelected;

users = $scope.users;

for (var i=0;i<users.length;i++){

  if (usersSelected.some(function(e) e.UserID == users[i].UserID)) {
    users[i].Selected = true;
    console.dir(users[i]);
  }


}

#1