1.angular.copy

angular.copy(source, [destination]);

• If no destination is supplied, a copy of the object or array is created.如果目标对象没有提供，就会创建对象或者是数组的复制份
• If a destination is provided, all of its elements (for arrays) or properties (for objects) are deleted and then all elements/properties from the source are copied to it.
• If source is not an object or array (inc. null and undefined), source is returned.
• If source is identical to 'destination' an exception will be thrown.

    
        
    
  
     
           姓名: 
      
      
     邮件: 
      
      
     性别: 
      male     
      female
      
     
      重置     
      保存    
     
   
     
form = {
   {user | json}}
   
     
master = {
   {master | json}}
     
    
jsvar APP = angular.module('app', [])   APP.controller('ctrl', ['$scope', function($scope) {       //angular.copy(source, [destination]);       //1，If no destination is supplied, a copy of the object or array is created.如果目标对象没有提供，就会创建对象或者是数组的复制份       //2，If a destination is provided, all of its elements (for arrays) or properties (for objects) are deleted and then all elements/properties from the source are copied to it.       //3，If source is not an object or array (inc. null and undefined), source is returned.       //4，If source is identical to 'destination' an exception will be thrown.     $scope.master= {};     $scope.update = function(user) {       // Example with 1 argument       $scope.master= angular.copy(user);//没有提供destination，就会创建，并且赋值给master     };     $scope.reset = function() {       // Example with 2 arguments       angular.copy($scope.master, $scope.user);//destination提供了，删除原有的元素，然后从原数据源中copy所有的数据     };     $scope.reset();   }]);

页面显示效果:

2,$watch函数 使用$watch函数监控数据模型的变化，当你的数据模型的某一部分发生变化的时候，$watch函数可以向你发出通知，你可以监控每一个对象的属性，也可以监控需要经过计算的结果(函数)，实际上只要能够被当作属性访问到，或者可以被当作js函数计算出来，就可以被$watch函数监控: $watch(watchFn,watchAction,deepWatch) watchFn:该参数是一个带有angular表达式或者函数的字符串，它会返回被监控数据模型的当前值。 watchAction:这是一个函数或者表达式，当watchFn发生变化时会被调用。 deepWatch：如果设置为true，这个可选的布尔型参数将会命令angular去检查被监控对象的每一个属性是否发生变化。 $watch函数会返回一个函数，当你不再需要接受变更通知时，可以利用这个返回的函数注销监听器. 如果我们需要监听一个属性，然后接着注销监控，我们可以使用如下代码: var item = $scope.$watch('module.property',callbackonchange());

          
        
            
    
      
     
        
      {
   {item.title}}        
              
      {
   {item.price | currency}}        
      {
   {item.price * item.quantity | currency}}      
     
      
     
      总消费: {
   {totalCart() | currency}}
     
      
     
      打折: {
   {bill.discount | currency}}
     
      
     
      打折后消费: {
   {subtotal() | currency}}