从数组中删除$$ hashKey [英] remove $$hashKey from array

问题描述

$scope.appdata = [{name: '', position: '', email: ''}];

这是我在角度控制器中创建的数组.

This is the array which I created in angular controller.

然后我使用push方法将一些值插入到数组中

Then I inserted some values in to array by using push method:

$scope.appdata.push({name: 'jenson raby', position: '2', email: '[e-mail]'});

这是插入后的数组值:

$$hashKey:"00F",name:"jenson raby",position:"2",email:"[e-mail]",

在插入后，在数组中添加了额外的$$hashKey，但是我需要从数组中删除它.

Here an extra $$hashKey has been added to the array after insertion, but I need to remove this from array.

推荐答案

根据您的评论，您需要将数组插入数据库中，我假设您正在将其转换为JSON字符串，然后保存它到数据库.如果不正确，请告诉我，我将看看是否可以修改此答案.

Based on your comment that you need to insert the array into the database, I'm going to assume that you are converting it a JSON string and then saving it to the DB. If that's incorrect, let me know and I'll see if I can revise this answer.

在将数组转换为JSON时，有两个选项可用于修改数组.第一个是 angular.toJson ，这是一种便捷的方法，它会自动删除带有在序列化数组(或对象)之前，以前导$$开头.您将像这样使用它:

You have two options for modifying your array when converting it to JSON. The first is angular.toJson, which is a convenience method that automatically strips out any property names with a leading $$ prior to serializing the array (or object). You would use it like this:

var json = angular.toJson( $scope.appdata );

如果需要更精细的控制，则应使用另一个选项，它是内置

The other option, which you should use if you need more fine grained control, is the replacer argument to the built-in JSON.stringify function. The replacer function allows you to filter or alter properties before they get serialized to JSON. You'd use it like this to strip $$hashKey:

var json = JSON.stringify( $scope.appdata, function( key, value ) {
    if( key === "$$hashKey" ) {
        return undefined;
    }

    return value;
});

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