effective python

only one 12 effective month in a year, so month should reflect that fact.One way to do this is to use an enum to represent the month, but the enum does not have the type security we want to have, such as an enum that can be used as an int, and the safer solution is to pre-define all valid month:Class Month {public: static Month Jan () {return month (1)}; Static month Feb () {return month (2)}; ... Static month Dec () {return month (n)};p

this series as effective JavaScript 's reading notes. in the JavaScript , a function object exists on the toString method, which makes it easy to return the source code of a function to a string object. (function (x) {return x + 1;}). ToString (); "Function (x) {\ n return x + 1;\n}"toString method will not only let some hackers find the method of attack, but also the method has serious limitations. First, toString method is not implemented in a way t

How to quickly improve Alexa rankings/non-cheating/real effective about how to quickly improve Alexa, you can refer to this article, if your site itself ranked outside the 20.5 million:The first method: Landing alexa.com Perfect webmaster information, you can improve about 10.2 million, the operation is very simple, and one-time do not need follow-up maintenance, recommended.The second method: The installation of Alexa toolbar, very

Yeyaming (Eric Ye), Ctrip's chief architect, is responsible for research and development in the mobile, Web, call center and other departments, leading the development of business and areas including hotels, air tickets, business travel, open APIs, global stations, user experience research. He has summed up six kinds of effective programming models from the changes in e-commerce in the past ten years, which are widely used in the product development p

1. Don't let the exception escape the reason for the destructor Article 08 of the third edition of effective C + + recommends that you do not throw an exception in a destructor because the C + + exception mechanism cannot handle two or more than two exceptions at the same time. Where multiple exceptions exist at the same time, if the program does not end, it can cause ambiguous behavior. the following code: Class widget{public : ~widget () {...}

If you have not read "effective C + +" but believe that you have no understanding of C + +, I am afraid you have to think twice. Steve Schirripa the book this way.Seriously opened the effective C + + three times, each time is to see the pain. There are three reasons, one is that the traditional terminology in it makes me miserable, always have to turn to the previous table to find the corresponding simplifi

First, shut down the system WebClient service 1 first opens the Win7 system the Start menu, and opens the Running dialog window, enters "Services.msc", opens the service setting; 2 Find the Disable the WebClient service item, if it is running, turn it off first, and then modify the startup type to disabled. (PS: The effect of this method is that WebDAV requests will not be transmitted, and any other service items that are significantly dependent on the "WebClient" service will be affected)

MySQL in Myisam,innodb by default is the Btree index, as to how the data structure of btree is not important,Only need to know the result, since is the index that this data structure finally is orderly, like Xinhua dictionary His directory is according to A,b,c. This is a well-ordered line;So when you're looking for something, like you're looking for an explanation of the word "Zhong," you'll definitely be positioned at the beginning of the Z section of the table of contents;The combined index c

. That is, log out of MySQL again and find that the configuration is in effect. 3. Restarting the MySQL server found that it did not work (modify/ETC/MY.CNF to make variable start effective)Remember to modify the my.cnf file to allow MySQL to change the value of the variable after restarting, it is important to note that using SET global setting MySQL variable value needs to be configured at the timeWrite down this variable under the [mysqld] stack in

Tags: managing tuning direction Cache ACK Analysis binding shared pool SQLAnalysis of effective cursor management"Thinking Analysis"The ability to interpret cursors as shared run schedules when SQL is not shared. There are two directions to the conventional approach:1. Adjust the size of the shared pool (shared operation plan in the library buffer of the shared pool);2, SQL writing as far as possible to reuse the binding variables, in order to play th

want to know the most cost-effective Chengdu decoration company? Want to know Chengdu word-of-mouth decoration company which is the most cost-effective? Want to know Chengdu reputation Decoration Company cost-effective recommended brand? When the decoration starts, you must understand the difference between the whole package and the half bag. This is also when yo

650) this.width=650; "Src=" https://cdns-mockplus-cn.alikunlun.com/image/2016/06/ 1fe3599b-628f-4cf8-b0ab-3e8ac5da6dc8.jpg "height=" 595 "width=" 863 "style=" width:863px;height:595px; "alt=" 1fe3599b-628f-4cf8-b0ab-3e8ac5da6dc8.jpg "/>And many of the products are small white, Mr. Xiong is just beginning to touch the work of products. From this time on, Mr. Xiong will grope for the Quick Design prototype tool Mockplus. If you are interested, then come together.Using the simplest and most straigh

"Effective STL Chinese Version" PrefaceThe first time I wrote about STL (standard templatelibrary, Standards Template Library) was introduced in 1995, when I made a cursory introduction to STL in the last article in more effective C + +. Shortly thereafter, I received some emails asking when I was going to start writing effective STL. I have been rejecting this i

Chapter Review:The 1th chapter of effective C + + makes himself accustomed to c++-reading notesEffective C + + 2nd structure/destructor/assignment operation (1)-Reading notesEffective C + + 2nd structure/destructor/assignment operation (2)-Reading notes"Effective C + +" Chapter 3rd resource Management (1)-Reading notes"Effective C + +" Chapter 3rd Resource Manage

gofmt emits them by default. Use spaces only if you must. Line Lengthgo have no line length limit. Don ' t worry about overflowing a punched card. If a line feels too long, wrap it and indent with an extra tab. Parenthesesgo needs fewer parentheses:control structures (if, for, switch) does not has parentheses in their syntax. Also, the operator precedence hierarchy is shorter and clearer, so use tab to indent gofmt default tab if not necessary, do not use a space to indent (this does not quite

"Real and effective IDs"At the lowest level of the operating system, the kernel, users and groups aren ' t identified by names, but numbers . The kernel needs to being fast and robust, and data structures better be small, and moving around strings are anything but eff Icient. So, each user name and group name are mapped to a unique unsigned number, called User and group ID for short, or UID and GI D. This mapping are done via the /etc/passwd and /etc/

Recently discovered "effective modern C + +" This book, the author is the famous Scott meyers--"effective C + +", "effective STL" author.And in the c++11 gradually popularized, even c++14 new features into everyone's vision, "effective modern C + +" a book emerged. The book, like its predecessors, was launched through

"Effective C + +""Original title" Effective C + +, third Edition"Former publishing house" Addison Wesley/pearson"Author" (US) Scott Meyers"Publishing House" electronic industry publishing house"More effective C + +""Original title" more effective C + +: New Ways to Improve Your Programs and Designs"Former publishing ho

There isn't a good computer in the house, do what are not satisfied, see the film is always card, play games, can only play a little game, big game on the panic, the screen is not smooth, if the user or five years ago to buy a computer, that configuration must not, need to replace the new computer. Home computer can choose brand machine or assembly machine, brand computer price slightly more expensive, but compatibility and stability are very good, assembly machine computer cost-

Article Description: in a scenario design, there is a situation where all possible scenarios appear to have been exported, but are not satisfied when the discussion is finalized, and think that there should be more optimal output? What causes this situation? How to output an effective design plan? In a scenario design, there is a situation where all possible scenarios appear to have been exported, but are not satisfied when the discussion