redbox suggestions

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

: 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

Learning routes and suggestions for PHP beginners [Guide]This article focuses on PHP learning. I have previously introduced "important materials! PHP Resources Summary Daquan on Github, in-depth discussion of PHP class encapsulation and inheritance, PHP learning planning suggestions, and other content helpful for PHP learning, in order for you to better learn PHP, I mainly want to talk about the PHP Learnin

New users want to learn python, and have never studied programming before. Now, if they want to learn python, do you have any suggestions or recommended materials? New users want to learn python, and have never studied programming before. Now, if they want to learn python, do you have any suggestions or recommended materials? Reply: I am a beginner in Python. I would like to provide some

Suggestions for improving SQL Execution efficiency: do not include subqueries in where; Do not write time queries as follows: whereto_char (dif_date, yyyy-mm-dd) to_char, yyyy-mm-dd); in the filter condition, the condition for filtering the maximum number of records must be placed at the end of the where clause; Written In The FROM clause Suggestions for improving SQL Execution efficiency: do not include su

every friend who engages in C + + development believes that they can give some advice to the latter, but there is very little to summarize. This article gives the deduction Ding school www.codingke.com to the C + + Programming development Study 50 Suggestions, summarizes is quite good, Programmers (not limited to C + + learners) If they really understand these suggestions, I believe in learning to accurate

Are there any friends who are already using tablets? I want to buy one. I 'd like some suggestions for you ~ -- Linux general technology-Linux technology and application information. For details, refer to the following section. N years ago, I was trying to get a simple machine to play with. I first wanted to get an UMPC, but I never started. Now it seems lucky that I didn't do it. This stuff is basically a chicken fault ~~ I want to buy a tablet, whi

SQL Execution efficiency has always been a concern. How can we improve it? If you have any better methods, I would like to share with you some good suggestions. If you are interested, please refer to them. I hope to help you copy the Code as follows: -- When the FROM clause contains multiple tables, select the table with the least number of records as the base table -- resolve WHER SQL Execution efficiency has always been a concern. How can we improve

If you have site building experience, please come in and give me some suggestions. my younger brother just learned php and the project experience is 0. the boss asked me to change a bus Query website written in. net and upload it to the server. The program is changed, but the code runs correctly only in the local environment. Especially when testing with different browsers, such as firefox, the page is distorted... Although I have a little knowledge o