null meaning in chat

In the previous chapters, we analyzed the design and implementation principles of the service-side system, in which we use the server-side framework to implement a chat system that runs in the intranet environment. The chat system consists of two

ObjectiveThe previous article explains how to customize the right-click menu, which is the front-end content, the content of this article is one: query. Chat history query, in the previous blog about finding friends has mentioned Elasticsearch,

PHP websocket and phpwebsocket for real-time web chat Preface As a new feature in HTML5, websocket has been very popular because it is really cool. It breaks the conventional thinking of http "request-response" and enables the server to actively

JavaScript provides application and call two invocation methods to determine the direction of this in the function body, which is characterized by the way in which objects can ' borrow ' other objects.Some of the previous blogs reviewed some of the

in JS, whether it is a function, or a method, or an event, or a constructor, ... Its essence is all functions. It's just a different seat. Four modes are: function mode, method mode, constructor mode, context mode1. Function modeFeature: is a simple

Source code Download Link: http://download.csdn.net/detail/sky453589103/9514686If you have any questions, please leave a message.If a server can only provide servers for two users, it is really too slag. Most of the time, chat customers will be more

Linux Learning Chat (i)--Shell Basic operations and commands(Reproduced please attach this article link--linhxx)1, #!/bin/shPlaced at the beginning of the program, expressed in/bin/sh way to parse.2. Variables1) variable assignment varname= ' xxx ',

Original URL: http://www.jnecw.com/p/1523To understand the socket must first understand the difference between HTTP and TCP, simply said is a short chain, one is a long chain, one is to go to the server pull data, one is the server can actively push

Ali's interviewer asked a question, if corepollsize=10,maxpollsize=20, if there were 25 threads to do,Answer: Of course the first place in the blocking queue (if the number is 0, has been waiting, Linkedblockingdeque is a chain list structure of the

The previous article introduced how to borrow WEBQQ Agreement landing QQ, this article mainly talk about how to achieve mass message. As far as I know, there are 3 types of messages, namely, friend messages, group messages, and temporary session