10 suggestions for improving Web application performance by 10 times
Improving the Performance of web applications is never more important than now. The proportion of the network economy has been growing; more than 5% of the global economy value is produced on the Internet (see the following information for data ). This time online hyper-connection world means that users' expectations are also at the highest point in history. If your website cannot re
50 suggestions for C ++ programming and development
The 50 suggestions are listed below:
1. Take C ++ as a new language learning (it has nothing to do with C !).
2. Read Thinking In C ++ and do not read C ++ programming ideas.
3. read "The C ++ Programming Language" and "Inside The C ++ Object Model". Do not read them because they are difficult and we are beginners.
4. Do not be confused by words such as
30 suggestions for writing JAVA code(1) The first letter of the class name should be capitalized. The first letter of the field, method, and object (handle) should be in lowercase. For all identifiers, all the words in them should be placed together, and the first letter of the intermediate word should be capitalized. For example:ThisIsAClassNameThisIsMethodOrFieldNameIf a constant initialization character appears in the definition, all the letters in
"text interface" mentioned above is a software named shell! To use the text interface, you must use shell. However, there are too many materials on shell, including "Regular Expression", "pipeline command", and "Data Stream redirection". It is really better to understand! In addition, shell scripts is also very important to help you manage servers in the future! To learn!
6. Be sure to have the software Administrator:This is because Linux often has to install drivers or install additional softw
method.Back to top recommended 46:equals should consider a null value scenarioContinuing with the 45 suggested questions, we solved the question of the reflexive nature of the overwrite equals, is it perfect? To refactor the main method:public static void main (string[] Args) {person p1= new person ("zhang san"); Person p2= the new person (null);/* no changes in other parts, no more repeating */}Very small changes, you must know that the result is the package "null pointer" Except
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Online tools–css Minifier (API included), CSS Compressor
Text editor plugins:sublime text, Atom
Libraries:minfiy (PHP), Csso and Cssnano (Postcss, Grunt, Gulp)
Choose which tool must be dependent on your own workflow ~See more CaniuseDifferent browsers vary greatly in compatibility, so if we can target the browsers we need to adapt, we can query the browser version of a particular feature on caniuse, whether we need to add a specific prefix or whether there are bugs on a
is a teacher's shortcoming. Thank you for being able to come forward. The teacher corrected as much as possible.(5) Examination Mode MetamorphosisAssessment method is a part of the experience of good universities, but there are many shortcomings in the process of practice, I hope you understand. We can make many other suggestions before and after the examination. The teacher will improve as much as possible.For example, the next "review summary" redu
as one of the most Popular front-end building tools, Webpack occupies an important position in the eco-circle of Vue/react and other frameworks. In the process of developing a modern WEB application, Webpack and our development process and release process are closely related, how to improve the performance of Webpack build packaging is also related to our development and release of the deployment of efficiency. Here are a few suggestions for optimizin
With the expansion of Linux applications many friends start to contact Linux, according to the experience of learning Windwos often have some dazed feeling: I do not know where to start learning. Here are some suggestions for learning how to build a Linux test environment.First , the Linux test environment is built from the foundationOften some friends ask questions in the Linux forum, but most of them are very basic. For example: Why I use a command,
hints are also available in the prompts that are executed at the command line, but in English for suggestions. In the enterprise, I have not found the use of Chinese, in fact, this English is also good, related technical documents I just said a lot of domestic and foreign forums, and this system is foreign, so the reference document manual will be convenient, and English is a plus points of the language. Stepping stone is good, but it will become ano
. To use a class in a project, we don't need to delete the test code. If you make any kind of change, you can easily return to the test. This code can also be used as an example of how to use a class.(4) The method should be designed as a brief, functional unit, which describes and implements a discontinuous class interface part. Ideally, the approach should be concise. If the length is large, consider dividing it into shorter methods in some way. This also facilitates the reuse of code within t
conforms to the code specification, and then within the class of that key, define the redis_client and redis_key of the operation, and finally define the methods for adding, modifying, querying, and deleting related data through Cliet and key.Finally, one of the most important suggestions: The method of action defined in the cache.py is recommended to be called only by the methods body in the other class in the service layer. This benefit allows us t
teacher's shortcomings, thank you can put forward. The teacher corrected as much as possible.(5) Examination Mode MetamorphosisAssessment method is a part of the experience of good universities, but there are many shortcomings in the process of practice, I hope you understand. We can make many other suggestions before and after the exam, and the teacher will improve as much as possible. For example, the next "review summary" reduced to a page of A4 p
, but faster:
SELECT * from A, b where a.p = b.q
UNION
SELECT * from a, b where a.x = B.y
Source: http://www.bcarter.com/optimsql.htm
9. Use Index
The database index is similar to the index you see in the library: it allows you to get the information you want more quickly, just as the index in the library allows the reader to find the book as quickly as possible.
You can create indexes on one column, or on multiple columns. An index is a data structure in which the values of one
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 programming problems. The main difference between this and my book is that I've been thinking more about writing this article, so I
Article Description: If you are preparing a mobile device version for your site, this article will be quite useful to you, in this article, will explore the mobile Web page coding design of the various techniques and considerations.
If you are preparing a mobile device version for your site, this article will be quite useful to you, and in this article you will explore the techniques and considerations of Mobile Web page coding design:
For the user experience on the mobile devi
Label:1, index is critical, create a reasonable index, improve query speed; DBCC freeporccache dbccdropcleanbuffers nbsp; SET statinstic IO on SET statinstic IO off 1> query, where The statement also involves whether the query uses an index lookup or an index scan; 2> uses the SQL real-time query tool to analyze query performance, using an index performance higher than scanning the disk; 3>where Try not to use a calculated expression such as year () in the statement, resulting in
Namevar oldValue = event.oldvalue//Old valuevar newvalue = event.newvalue//New valuevar url = event.url//URL of the page that triggered the changevar storage = Event.storagearea//Current Localstorage reference (when Sessionstorage changes, here is the current sessionstorage reference, OK, pull away, can not understand the first to ignore)}This feature can help us to achieve simple communication, synchronization and data interaction across multiple pages, such as modifying a user's nickname in a
operations is IO processing. Most Database Operations spend more than 90% of their time on IO read/write. Therefore, minimizing IO reads and writes can greatly improve the performance of database operations.
We cannot change the data that needs to be stored in the database, but we can spend some time on the data storage method. The following optimization suggestions on field types are mainly applicable to scenarios with a large number of records and
It is not important to get started with a language, but a good programmer should at least master a language, and it is best to be "proficient! C ++ has a large user base, rich learning resources, and broad application prospects. Therefore, many programming enthusiasts hope to learn C ++ well. However, C ++ is obviously much more complex than C or BASIC. Many people think it is not easy to learn C ++ well. Here I would like to give some suggestions and
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