effective python

"Effective C + +" fourth: Design and declaration Make the interface easy to use correctly, not easy to misuse. An interface consists of a return type, an interface name, and a list of parameters, in order to make the interface easy to use correctly, you need to carefully design the return type, preferably simple, direct, natural. Interface name selection is very important to do simple, expressive, unambiguous. Parameter list formal parameter type

Effective C + + Chapter 1. Make yourself accustomed to C + + (Accustoming yourself to C + +) Item 1. View C + + as a language federation (View C + + as a federation of Languages) Consider C + + as a federation of four sub-languages, where codes and practices tend to be simple, straightforward, and easy to remember in a given sub-language. But moving from one sub-language to another, the code may change. C --c++ is based on C. Chunks (blocks

"Effective C + +" chapter Seventh: template and generic programming Learn about implicit interfaces and compile-time polymorphism. Object-oriented programming always uses an explicit declaration of an interface, and provides a special implementation in subclasses, thus realizing the run-time polymorphism. The interfaces in a template class are often implicit, implicitly meaning that when writing a template, it is assumed that the required interfac

"Effective C + +" Chapter II: Construction/destructor/assignment operations A function written by C + + by default. The C + + compiler generates a default version of the class if it does not find the following function:1) Default constructor2) Default destructor3) Copy Constructor4) Copy assignment operator (= operator)The first two functions are not always generated, it only occurs when the compiler needs it. The latter two are only guaranteed to

About effective Java This book, some of his own summary of thinking. The length may not follow the catalogue, because I like to read the first chapter directly. But to be sure, each chapter will have a summary. Welcome everyone to make bricks and add.1. consider replacing the constructor with a static factory method . Pros: There is a name that does not have to be created every time the object, return any subtype object, concise code. Disadvantage: Th

Wireless router to prevent rubbing network 1. We first need to know the router's entry address, open IE browser on the computer, and then enter 192.168.1.1. 2. After entering the router, click on "Wireless Settings"---"Wireless security settings" and the following figure: the password is best letters, numbers, words alphanumeric together. 3. Then filter the wireless MAC address below, if you are open let access to the wireless network. Enable: MAC address filtering function. 4

Add a variable to the/etc/profile file "for all users (permanent)" Using VI to add a variable to the file/etc/profile file, the variable will be valid for all users under Linux and is "permanent". To make the changes immediately effective, you need to execute the following code Source/etc/profile The above Linux to modify the environment variables and effective method is small series to share all

One: How can the new station be included as soon as possible? The best and most effective way is to go to the major websites and forum sent a post to do an advertisement, in order not to be deleted, so I suggest you to some exchange links to the plate to post the son (such as portals through the Forum, Webmaster Forum, etc.), you just go to a few sites to send a few stickers on OK, and then in others sent back a few post This is OK, you will be waiti

How to quickly make DNS modifications effective OS X, Chrome, and DNS In development, the domain name is often bound to some IP, and then need to switch frequently, then in Linux how to quickly let DNS modify sound? 1. First use the Dig command query domain name corresponding to the IP has been effective shell$ Dig grepalex.com ;; ANSWER section: grepalex.com.3600ina66.216.100.140 2. How to be c

How to save a canvas image on a Web page to the server using PHPJune 27, 2014 Crooked Neck Hacker released a reply 8 When HTML5 was not popular a few years ago, our project manager asked me to ask the project review experts to use a pen to electronically sign the tablet at the end of the review. This requires our review software to provide such a function: Open the browser, login, enter the review comments page, the bottom of the page has a block area, th

this series as effective JavaScript 's reading notes. in the Item , the paper introduces a combination of Apply variable argument list function implemented by method Average , it actually declares only an array as a parameter, but uses the Apply method, you can actually accept several elements as parameters:function Averageofarray (a) {for (var i = 0, sum = 0, n = a.length; i and using arguments variable, you can also remove the declared parameters. T

this series as effective JavaScript 's reading notes. in general, a function Thisis related to the invocation type of the function, such as when the function is called directly as a function, ThisThe general point is the global object(Strictmodewhen pointing toundefined)when the function is invoked as a method(thatX.method ()this form), Thispoint to ISxwhen the function is called as a construction method, Thispoints to a newly created object. But on s

this series as effective JavaScript 's reading notes. prototype , getpropertyof and the __proto__ is three to access prototype the method. They are named in much the same way that it is easy to confuse. They are used in the following ways:PrototypeIt is generally used to inherit objects from the prototype that establishes it for a type. For example , c.prototype = xxx, so that the object using new C () will be the prototype object of xxx. Of course,

this series as effective JavaScript 's reading notes. and the object.getprototypeof compared to __proto__ is also reflected in its ability to modify the prototype inheritance chain of an object. Because it is a property, it can be set in addition to the operation that gets it. However, never modify __proto__ . The reasons are as follows:first, the most obvious reason is portability. Since not all JavaScript Execution Environments support this property

Original articles, reproduced please specify the source: http://blog.csdn.net/sfh366958228/article/details/38816913Chat from Beidaihe Tourism return, the win their hearts continue to work, next will continue to study "effective C + +", today is the construction/destruction/assignment operation part.Article 05: Understand C + + silently write and invoke those functions when the compiler is processed, there is no absolute empty class, for example:Class

Tips"Effective Java, third Edition" an English version has been published, the second edition of this book presumably many people have read, known as one of the four major Java books, but the second edition of 2009 published, to now nearly 8 years, but with Java 6, 7, 8, and even 9 of the release, the Java language has undergone profound changes.In the first time here translated into Chinese version. For everyone to learn to share. 27. Eliminate

Tips"Effective Java, third Edition" an English version has been published, the second edition of this book presumably many people have read, known as one of the four major Java books, but the second edition of 2009 published, to now nearly 8 years, but with Java 6, 7, 8, and even 9 of the release, the Java language has undergone profound changes.In the first time here translated into Chinese version. For everyone to learn to share. Since Java 5,

virtual function is to allow derived classes to inherit only the function interface.The purpose of declaring a simple impure virtual function is to have derived classses inherit the interface and default implementation of the function.The purpose of declaring the Non-virtual function is to make derived classes the interface of the inherited function and a mandatory implementation.Template-specific methods, the template for the specificity of the same as a template, but the parameters of this te

Tips"Effective Java, third Edition" an English version has been published, the second edition of this book presumably many people have read, known as one of the four major Java books, but the second edition of 2009 published, to now nearly 8 years, but with Java 6, 7, 8, and even 9 of the release, the Java language has undergone profound changes.In the first time here translated into Chinese version. For everyone to learn to share. 18. Combinatio

Tips "Effective Java, third Edition" an English version has been published, the second edition of this book presumably many people have read, known as one of the four major Java books, but the second edition of 2009 published, to now nearly 8 years, but with Java 6, 7, 8, and even 9 of the release, the Java language has undergone profound changes. In the first time here translated into Chinese version. For everyone to learn to share.