writing reviser

Sometimes it's not that we don't want to do unit tests, but the code is really not testing ....For example, if a car does not complete the test after it has been produced, no one dares to drive it. The code is the same, if the project fails to do the test, then the customer will not dare to use it, even if used, will encounter "car accident."Why to test/test the benefits It can detect bugs early and fix bugs It will save the total cost of developing and maintaining a software. In fa

1th: How to create a "seam". Seam (seam) is a concept that needs to be known.2nd, avoid writing hard-to-test code when building objects.This article is the 3rd chapter, which describes the dependencies and Dimitri laws.Dimitri (Law of Demeter)Or use the example of building a car. When producing a car, you need a tyre, what type of tyre is needed to assemble it, the tyre is requested, and the person concerned will send the tyre from the warehouse to th

: All lowercase; try to use English; Do not add the lever and underline; Try not to abbreviate unless you see the words clearly. CSS style sheet file naming main master.CSS module Span class= "Hljs-selector-tag" >module.css Basic shared Base.css layout, layout layout .css theme themes .css column columns .css text font . css form forms.css patch mend.css print Print.css Second, the CSS writing order Posit

accept configuration files made up of a list of directories, and these directories are exposed at mount points. In this way, all backup scripts need to back up the mount point, and the various directories will be backed up immediately. It tends to be more focused on backup than encrypted storage. It should be fun to write. An example of a fuse file system The first step in writing this script is to write a purely transitive file system. It s

First (lazy, thread unsafe): Java code public class Singleton {private static Singleton instance; Private Singleton () {} public static Singleton getinstance () {if (instance = = null) {instance = New Singleton (); return instance; } } This type of writing lazy loading is obvious, but the fatal is that multithreading does not work properly. second (lazy, thread safe): Java code public class Singleton {private static Singleton instance; Private Singlet

We know that in JS, there is no concept of the class. All instance objects of a class inherit properties from the same prototype object, so the prototype object is the core of the class. A class is an abstraction of an object, and an object is a concrete instance of a class. Classes are abstract, do not occupy memory, and objects are specific and occupy storage space. ——— Baidu Encyclopedia Early JavaScript requirements are simple, basically written function, and then the process-oriented

Resultofoperation returns Nan). So the final result is that die () the resulting value will be assigned to Things_to_eat. function declaration in block of statement Never declare a function within a block of statements, which is illegal in the strict mode of ECMAScript 5. The function declaration should be at the top level of the scope. In a statement block, however, the function declaration can be converted to a function expression assignment to a variable. Not recommended if (x) {

The title of the content page is not said here, because the title of each article is different, and the weight of the content page is relatively low, is generally set title for the content title + column name + site name. The title of the homepage is the key, you want to let the search engine know what your site is doing, you must first write your title. General search engine will be the weight of the title from left to right to divide the weight, the more on the left keyword ranking the better

seo| problem This week, I wrote 5 questions about SEO, which we recently got from the cable engine optimization writing, which has a certain impact on brand management. These 5 FAQs have important information and are helpful in improving brand management.Question one:Our marketing department has invested a lot of resources in writing the content of the site, but it seems that we are not ranked high in searc

Website content optimization is one of the necessary steps in website promotion, content for the king, Good article content, not only improve the search engine rankings to improve traffic, then how to optimize the site content? Before I introduce soft writing skills to tell you what is "soft wen", soft wen, we can give it a popular definition: It is actually a more sophisticated method or technique of advertising, has been carefully designed "soft tex

. · Boolean variable names should contain is, which means yes/no or true/false values, such as Fileisfound. · When naming a state variable, avoid using terms such as Flag. A state variable differs from a Boolean variable where it can have more than two possible values. Instead of using Documentflag, you use a more descriptive name, such as documentFormatType. (This item is for reference only) · A meaningful name is still used even for variables that may be short-lived in a few lines of code. Use

library: > Io.write ("sin (3) =", Math.sin (3), "/n") --> sin (3) = 0.1411200080598672 > Io.write (String.Format ("sin (3) =%.4f/n", Math.sin (3))) --> sin (3) = 0.1411 You should avoid writing code like Io.write (A. B.. c); This writing is the same as the effect of Io.write (A,B,C). However, the latter consumes less resources because of the avoidance of inline operations. In principle, you use the print f

Anyone can write code! A few months of programming experience allows you to write "Running applications." Make it easy to run, but coding in the most efficient way requires more effort!You know, most programmers are writing "run code," not "efficient code." We mentioned earlier in this guide course, do you want to be your company's "Most distinguished professional"? Writing "Efficient Code" is an art that y

On the interpretation of the content of the site, then all the content of the release and reading is a kind of information exchange. However, the quality of the content depends not only on what is exchanged and how it is communicated, also depends on the object of communication, then we will write a high-quality article for the station to consider the situation we want to face the article, who needs to face, what kind of effect, and then finally successful to bring visitors a good experience, So

Because of the knowledge of the JS of Zhou Niu, I will share the initial stage of writing the storage process under SQL In the database world, in the SQL,DB, Oracle three databases, by writing a storage process to enhance or change the function of the business is a means, the increased flexibility of the database is self-evident. Let me introduce the writing of t

Requirejs is a JavaScript file and a module loader. Requirejs allows you to separate your JavaScript code into files and modules, while managing dependencies between each module. The goal of Requirejs is to encourage the modularity of code, which uses script loading steps that are different from the traditional "script" tags. Using Requirejs to load a modular script increases the speed and quality of code loading. One, why should use Require.js? At the earliest, all of the JavaScript code was

Xml| program Java and XML (ii) write XML reading and writing programs in Java This is to read the XML file Java program, I debug good. The DOM method is used to read the XML file into the vector. Package src; Import java.io.*; Import Java.util.Vector; Import javax.xml.parsers.*; Import org.w3c.dom.*; public class ReadXml { static document document; private Boolean validating; Public ReadXml () { } Public Vector toread (String filename) { Vector title

Then the previous article, http://blog.csdn.net/androidworkor/article/details/51176387, says how to write the captured data to the database.1. Writing a crawler scriptOr in the case of crawling embarrassing encyclopedia, write a script that is saved in the spider_qiushibaike.py file in the Hello/spiders directory#-*-Coding:utf-8-*-import scrapyfrom hello.items import helloitemclass spider_qiushibaike (scrapy. Spider): name = "Qiubai" start_urls

Label:Objective: One of the most important aspects of system optimization isoptimization of SQL statements. For massive data, inferiorSQL statements and high-qualityThe speed difference between SQL statements can be up to hundreds of times, visible for a system is not simple to achieve its function can be, but to write high-qualitySQL statements to improve the usability of the system.In the early stage of application development, because the database data is relatively small, the querySQL statem

How to use PowerPoint to make Chinese character writing stroke sequence demonstration lesson plan? We know that PowerPoint can be stacked on a layered scale for the objects that are being demonstrated. In this way, we may want to show the Chinese characters to the top, and make it transparent. Then, in the lower layer, the color blocks of another color are gradually filled in the order of their strokes, so that the animation is not written in Chinese