如何获取在angularjs更改的对象？ [英] How to get an object that was changed in angularjs?

问题描述

我用这个功能来观看对象的数组更改：

  $ $范围表（数据，功能（的newval）{} /*...*/，真实）;
 

我怎样才能在哪个属性已经改变，这样我可以在一个阵列推对象？
例如：

  VAR对myApp = angular.module（对myApp，[]）;myApp.factory（数据，函数（）{
VAR数据= {[ID：1，属性：随机}，{ID：2，属性：随机再次}];
返回数据;
}）;变种myBigArray = [];功能tableCtrl（$范围，数据）{
    $ scope.TheData =数据;
    $范围。$表（海图，函数（）{    //这里的对象应该推
    myBigArray.push（＆GT;＆GT;对象，其中财产已被更改＆LT;＆LT;＆LT;）;
    }，真正的）;
}
 

解决方案

修改：请注意，此解决方案原来是一个不好的做法，因为它是加入了很多观察家的，这是你不希望，因为它有一个性能损失。

=======

我最终想出了这个解决方案：

  items.query（功能（结果）{
    _（结果）。每个（函数（项目，我）{
        $ scope.items.push（项目）;
        $范围。$腕表（'项目['+ I +']'，函数（）{
            的console.log（项目）; //这是改变的项目。
        }，真正的）;
    }）;
}）;
 

I use this function to watch an array of objects for changes:

$scope.$watch('Data', function (newVal) { /*...*/ }, true);

How can I get an object in which property has been changed so that I can push it in an array? For example:

var myApp = angular.module("myApp", []);

myApp.factory("Data", function(){
var Data = [{id:1, property: "Random"}, {id:2, property: "Random again"}];
return Data;
});

var myBigArray = [];

function tableCtrl($scope, Data){
    $scope.TheData = Data;
    $scope.$watch("TheData", function() {

    //Here an object should be pushed
    myBigArray.push(">>Object in which property has been changed <<<");
    }, true);
}

解决方案

Edit: Note that this solution turns out to be a bad practice as it is adding a lot of watchers, which is something you do not want because it has a performance penalty.

=======

I eventually came up with this solution:

items.query(function (result) {
    _(result).each(function (item, i) {
        $scope.items.push(item);
        $scope.$watch('items[' + i + ']' , function(){
            console.log(item); // This is the item that changed.
        }, true);
    });
});

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