c programming problems and solutions book

Asynchronous programming is very important in JavaScript. Too many asynchronous programming have problems with callback nesting, and this article provides some ways to fix "callback Hell". setTimeout(function () { console.log(‘延时触发‘);}, 2000);fs.readFile(‘./sample.txt‘, ‘utf-8‘, function (err, res) { console.log(res);});The above is a typical callback fun

When it comes to threading programming, our initial understanding is that the system resources can be programmed to switch between different threads to enable the system to run efficiently. Then this seemingly straightforward problem, actually operation, but hide a lot of complex details, in which the synchronization between threads and communication problems, is to lead to multithreaded

Linux programmers often encounter problems with Linux novices, and today lists the most common programming errors encountered by novices, and provides solutions for them:1) because it is a new Linux novice, it is now beginning to touch threading programming, according to an example in the Gun/linux

create new external connections. In fact, there is an exception but a common situation: the S module is deployed on the server as a webserver and bound to a local port; the client and S are short connections, and s actively disconnects each interaction. In this way, when the number of concurrent accesses to the client is very high, the machine where the S module is located may have a large number of TCP connections in the time_wait status. However, because the server module is bound with a port

approach, and we can't always bind all the function interfaces to the properties of the Window object, which is no different than declaring the function directly in the code.So, one more step of optimization is to do the module object, very simple optimization, the function is bound to the module object, by accessing the properties of the module object to invoke the function:　　　　varMonthtranslator = (function(){ varnames = [' One ', ' two ', ' three ', ' four ', ' five ', ' six ', ' VII ', '

can also.The checked function and the show function are very simple and are not mentioned much.I give the Sudoku example is a single result of the Sudoku, is more difficult, if you are interested, you can search the other Sudoku to test this code it!!This method can enumerate all the solutions of a Sudoku.Expand:This loop + recursive + backtracking mode can solve all the problems of filling in the numbers

Preface: The previous article introduced some basic knowledge of parallel programming, from this beginning, will talk about the actual encounter some problems in parallel programming, the next few will talk about data sharing problem. The topics in this article are as follows: Data competition Solution proposal Sequential Execution Solution Data invariant

The following describes how to program the network with simple but typical client and server programs. This section describes the client, a client used to connect to and read the time sent by the server. This involves writing code, so we need Build a UNIX Network Programming Environment The UNIX system is not installed, the system is not easy to obtain, and there is no need to install UNIX. Linux is the best choice. In addition, I was originally a Ub

and the Java virtual device (JVM) can tune program code together, and these optimizations are difficult or impossible to implement for code in the class library. In My taming Java Threads (see Resources) book and in this article, I further recommend that you make some modifications to the Java programming language itself so that it can really solve these threading pro