writing software programs

); Console.readkey (); Cts. Cancel (); Console.readkey (); } Static voidtasksended (task[] tasks) {Console.WriteLine ("All tasks are complete! "); } The output of the above code is:Task begins ...Task begins ...Task begins ...All tasks have been completed (canceled)!This recommendation shows how task (Task) and TaskFactory (Task Factory) are used. Task further optimizes the scheduling of the background thread pool and speeds up the processing of threads. So in the FCL 4.0 era, if yo

Writing high-quality code-suggestions for improving python programs (2), high-quality python The original Article is published on my blog homepage. For more information, see the source! Recommendation 7: Use the assert statement to discover problemsAssert exists in many languages and is mainly used for debugging programs. It can quickly and conveniently check pro

A blog column suitable for me Writing Windows service programs Five steps for compiling a Windows Service Program in C Language Principles and Discussion of writing Windows Services (I) Principles and Discussion of writing Windows Services (II) Principles and Discussion of

There is nothing new in this book, most of it is excerpts from effective C + + or other books, and the following are some of the things I might overlook when I'm programming. 1. Structure body variable layout: From small to large declaration by type size. 2. Introduce a large amount of C code in C + + code, and note whether to add extern "C". (C + + overloads, function names are flagged) 3. Manage the new object with a smart pointer. 4. Initialize with the member initialization list. 5. If you d

Workaround:1, installation Fcitx-frontend-qt5[Email protected]:/home/he# sudo apt-get install fcitx-frontend-qt52. Copy the installed FCITX-FRONTEND-QT5 to the QT installation directoryTypically, FCITX-FRONTEND-QT5 is in the following directory path (the file installation path can be seen with the command dpkg-l package name ):/usr/lib/x86_64-linux-gnu/qt5/plugins/platforminputcontexts/libfcitxplatforminputcontextplugin.soCopy the file to/home/he/qt5.5.1/tools/qtcreator/bin/plugins/platforminput

Relasesource (ResultSet Rs,co Nnection Conn, Statement Statement) {if (rs! = null) {try {rs.close ()} catch (SQLException e) {//TODO auto-generated catch Blocke.printstacktrace ();}} JDBC_TOOLS.RELASESOURCE (conn, statement);} public static void Relasesource (Connection conn, Statement Statement) {if (statement!=null) {try {statement.close ();} catch (SQLException e) {e.printstacktrace ();}} Use two if, so that if an exception occurs in the middle, the program continues execution if (conn!=null

operator "= =" On the left represents the parameter of the method, and the method body on the right.We use lambda expressions by calling extension methods directly, which completes the functionality and reduces the line of code. In practical work, this method should be used flexibly.foreach (var in Personwithcompanylist.where (p=>p.companyname=="Sun") { Console.WriteLine (item). personname);}Output:MikeSteveCall the OrderByDescending extension method, sorting for PersonName:foreach (var in p

Although Vim is very powerful, the personal sense code hint function is not as powerful as visual assist. How do I use visual assist to implement code hinting?First explain my environment: host is XP (O (∩_∩) o~ or XP), virtual machine vmware + Ubuntu 9.041. First set up file sharing: Install VMware tools. The installation notes are as follows:Copy the installation files to/TMP path, unzip, enter the extracted directory, execute the install file. Use the ENTER key all the way, using the default.

). Of course, the two most important role in the app's language of Lua is to create a plug-in system that allows users to write scripts themselves. There are many more. How to use LUA in iOS development. Although you cannot create a plug-in system for end users or allow users to write their own scripts, you can still develop your system in a plug-in way. This speeds up the development of prototypes and helps add new features in the next release. There's another benefit to using LUA, it allows

First set: Byte stream read Write schemeFileInputStream: Byte stream read text fileFileOutputStream: Byte stream write to hard diskSecond set: Character Stream read Write schemeFileReader: Character Stream reads textFileWriter: Character Stream writes textBufferedReader: Custom cache size, read text 8,192 CharBufferedWriter: Writing textGenerally used in combination with FileReader and filewriterFourth set: can read binary (img image, etc.)DataInputSt

First set: Byte stream read Write schemeFileInputStream: Byte stream read text fileFileOutputStream: Byte stream write to hard diskSecond set: Character Stream read Write schemeFileReader: Character Stream reads textFileWriter: Character Stream writes textBufferedReader: Custom cache size, read text 8,192 CharBufferedWriter: Writing textGenerally used in combination with FileReader and filewriterFourth set: can read binary (img image, etc.)DataInputSt

("E:\\5.txt"); FileOutputStream Fos=NewFileOutputStream ("D:\\55.txt"); DataInputStream Dis=NewDataInputStream (FIS); DataOutputStream dos=NULL; byte[]bytes=New byte[1024]; intdata; while((Data=dis.read (bytes))!=-1) {dos=NewDataOutputStream (FOS); Dos.write (bytes); } dos.close (); Dis.close (); Fos.close (); Fis.close (); System.out.println ("Copy succes!!!"); }DataOutputStream: writes the In-memory binary data to a file on the hard diskDataOutputSt

General steps for writing socket programs in unix-general Linux technology-Linux programming and kernel information. The following is a detailed description. Writing a socket program in unix may be the most convenient. You only need to master the general steps to write the application for the transport layer. 1. Understand several common socket Functions # Incl

Note the following when writing a program: 1. Check whether the text editing box contains invalid characters. For the numeric type, you must determine whether it contains non-numeric values. For the character type, you must determine whether it is within the allowed characters. 2. for a period, you must determine whether the previous date is greater than the next one. We also need to judge the date of January. (The birth date in www.chinaren.com is no

Recommendation 93: Construction methods should initialize primary properties and fieldsThe properties of the type should be initialized before the construction method call is complete. If the field does not set an initial value in the initializer, it should be initialized in the constructor method.Once a type is instantiated, it should be considered as having complete behavior and attributes. classCompany {Employee Speciala=NewEmployee () {Name ="Mike"}; Employee Specialb; PublicEmplo

Recommendation 109: Use nested classes with cautionThe principle of using nested classes is that when a type needs to access a private member of another type, it is implemented as a nested class. A typical example is when implementing a collection to implement Iterators for a collection, when nested classes are used. The code looks like this: Public classarraylist:ilist, ICollection, IEnumerable, icloneable{//omitted Public VirtualIEnumerator GetEnumerator () {return NewArraylistenumeratorsi

Singleton is: Public Sealed classSingleton {StaticSingleton instance =NULL; Static ReadOnly Objectpadlock=New Object(); //restrict instances from being created externally PrivateSingleton () {} Public StaticSingleton Instance {Get { if(Instance = =NULL) { Lock(padlock) {if(Instance = =NULL) {instance=NewSingleton (); } } } returninstance; } } Public voidSampleMe

the friendly information.Situation ThreeIf the underlying exception does not make sense in the context of a high-level operation, consider capturing these underlying exceptions and throwing new meaningful exceptions. If a invalidcastexception is raised as a new ArgumentException.A typical example of a properly thrown exception is capturing the underlying API error code and throwing it. Looking at the console class, you'll also find a lot of places with similar code: int errorCode = m

{ publicabstractvoid Execute (); }All commands such as start or stop are inherited from this abstract class: class Startcommander:commander { publicoverridevoid Execute () { // start } } class Stopcommander:commander { public overridevoid Execute () { // stop } }After using polymorphism, the code that invokes the method should look like this: Static void Main (string[] args) {

other types. If you combine too many types, it means that the current class is likely to do too many things, and it needs to be split into two classes. Inheritance does not have such an attribute, in C #, a subclass can have only one base class (the interface releases this restriction, and subclasses inherit from multiple interfaces).The use of inheritance or composition should be considered according to the actual situation. In general, the combination can be more satisfying for most applicati