从json数组中删除数据 [英] Delete data from json array

问题描述

我试图从json数组中删除一段数据。例如，我有这个数组

I am trying to remove a piece of a data from a json array. For example I have this array

var favorites =    {
        "userID": "12345678",
        "favorites": [

            {   "name" : "My Favorites",
                "id" : "87654321",
                "items": 
                [
                    { 
                        "productID": "11234567",
                        "added": "TIMESTAMP",
                        "title": "Project",
                        "type": "Weekend Project",
                        "imageURL": "1"
                    },

                    { 
                        "productID": "11223456",
                        "added": "TIMESTAMP",
                        "title": "Bathroom",
                        "type": "Weekend Project",
                        "imageURL": "2"
                    },

                    { 
                        "productID": "11223345",
                        "added": "TIMESTAMP",
                        "title": "Curves",
                        "type": "Collections",
                        "imageURL": "3"
                    }
                ]
            },
            {   "name" : "Bathroom",
            "id" : "87654323",
            "items": 
            [
                { 
                    "productID": "11122224",
                    "added": "TIMESTAMP",
                    "title": "Project",
                    "type": "Weekend Project",
                    "imageURL": "1"
                },

                { 
                    "productID": "11122222",
                    "added": "TIMESTAMP",
                    "title": "Room",
                    "type": "Weekend Project",
                    "imageURL": "2"
                },

                { 
                    "productID": "11112222",
                    "added": "TIMESTAMP",
                    "title": "Strais",
                    "type": "Collections",
                    "imageURL": "3"
                },

                { 
                    "productID": "11111222",
                    "added": "TIMESTAMP",
                    "title": "Door",
                    "type": "Collections",
                    "imageURL": "4"
                }
            ]
        }
        ]
    } 

说我想点击一下浴室类别中的产品一个按钮。我将如何实现这一目标？

Say I wanted to remove the a product out of the bathroom category on the click of a button. How would I acheive this?

我一直试图这样做无济于事：

I have been trying this to no avail:

jQuery(document).on('click', ".removeFav", function() {
    favorites.favorites[1].items[1].splice();
}

错误我收到：

Uncaught TypeError：Object＃没有方法'splice'

Uncaught TypeError: Object # has no method 'splice'

推荐答案

To取消设置任何变量使用 delete 语句：

To unset any variable use the delete statement:

delete favorites.favorites[1].items[1]

这是正确的方法，它会起作用，但如果你的目标是按顺序保存索引，然后使用 splice 方法的方法：

This is correct way, and it will work, but if your goal is to preserve indexes in order, then your way with the splice method is the way to go:

favorites.favorites[1].items.splice(1,1);

上面将从第一个索引（第一个参数）开始删除一个元素（第二个参数）。

The above will remove one element (second parameter) starting at 1st index (first parameter).

所以要明确：到r emove最后一个元素使用：

So to be clear: to remove the last element use this:

var arr = favorites.favorites[1].items;
arr.splice(arr.length - 1, 1);

在JsFiddle上查看您的代码。

如果数组未设置或为空，您可以采取其他措施来保护代码：

You can take additional measures to protect the code in case the array is not set or empty:

var arr = favorites.favorites[1].items;
if ( arr && arr.length ) {
    arr.splice(arr.length - 1, 1);
}

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