x360 review

This is my second blog in 51, mainly to review my it career, first after graduation I engaged in ERP development, involving large enterprises of human resources management, logistics management, production management, finance and other fields, the front desk will make form, report. The background will write stored procedures and so on. In the software development process I participated in the whole process of software including: Demand research, summa

Disclaimer: This article is for the author to review the database course with a simple record of notes, if there are errors, please point out, thank you.First, the theoretical basis1. non-destructive connectivity (Lossless join): Set relationship mode R (u,f) is decomposed into several relational patterns R1 (U1,F1), R2 (U2,F2), ..., Rn (UN,FN), where u=u1u2 ... Un, and there is no Unuj, FI is the projection of F on the UJ, if R is equal to the result

Review database Connection pool: C3P0, DBCP1, the advantages of database connection pooling technology:• Resource reuse:Due to the reuse of database connections, there is a high performance overhead associated with frequent creation and release of connections. On the basis of reducing the system consumption, on the other hand, it also increases the stability of the system operating environment.• Faster system response Speed:Database connection pooling

"Cleanmymac" and run to clean up binary code, system cache, logs, language, garbage, garbage, etc. CLEANMYMAC also has device management, fast and permanent erase and extension manager, while allowing for custom appearance modifications. Currently, the clean My mac contains more than 50 features in maintenance, monitoring, cleaning, utilities and feedback categories.Cleanmymac and MacKeeperAny good "Cleanmymac" commentary will compare it to its biggest competitor, MacKeeper, and that's why I'm

=============================================================================VI/VIM Command Review and Practice:---------------------------------------The Command mode yy copies the contents of the line where the cursor is located 4yy the copy cursor is located on the line starting with the 4 line of content p paste dd Delete/cut the contents of the line where the cursor is located 2DD Delete/The cut cursor is located on the line where the 2-row cont

Tags: database view sqlDatabase review concept of CH6 view 6.1 viewA view is a virtual table that is exported from one or more tables (or views), and the DBMS only holds the definition of the view in the data dictionary , and the view's data is still actually stored in the base table where it was exported The basic statements for defining views in Tutorial D are as follows: view_name> VIEW (relational_condition>) {property_list>}; So what does a view

Tags: database transaction SQL SQL transactionDatabase review CH13 Transaction 13.1 ConceptsA transaction is a series of database operations performed as a single logical unit of work that may modify multiple tuples in multiple tables The structure of the normal execution of a transaction is: begin; 1 2 ... SQL execution N commit; The BEGIN flag starts a transaction, and multiple SQL statements are transactional logical units of work, commit(commit) i

Database Review CH2 Database Architecture 2.1 Database Architecture hierarchyA database architecture can be divided into 3 tiers: External level Conceptual hierarchy Internal level The external hierarchy refers to the interface that each user accesses the database in different high-level languages, the representation of the conceptual hierarchy database information, and the definition of the module (including security and integri

Code review". What is code review Code Review, or "code review," is the basic idea of an effective discovery of the flaws in the code by someone else reviewing his code after the developer has written his or her own code. One of the basic theories of code review is that th

A good code reviewer can greatly help programmers improve the quality of their code and reduce the chance of errors.While there are many code review tools available on the market now, how to pick is also a daunting task. After consulting the experts for advice and advice, we have listed the following 17 best code review tools.1) CodestrikerCodestriker is a free open source Web application that helps develo

[Execution instructions] 1. What is an effective review? I often think about this problem. [Body ]--- Software Department review system Change history Serial number Modify terms Modify content Modified by/date Secondary note

A few days ago saw "code Review Programmer's Hope and sadness", think of our team to carry out Code Review also has 2 years, the results are relatively satisfied, some experience should be able to share with you, explore.Why should we implement code review? We were faced with code clutter and bug-frequency situations.At the time I felt that there was a need to ch

First login, clickSummary, description, Testingdone, branch, Group, people , Review upload diff file, select project, New Request Publish Released: Review Board Support Pre-commit Review and Post-commit Review two modes, in short, is the first Review to submit or first commi

, rather than as a large paragraph narrative.Assign priority: All requirements should be assigned a priority level. If all requirements are considered equally important, project managers lose control of freedom in developing or saving budgets or schedulingThe above features are also the main points of the requirements review, before the review can be specified according to the actual needs of the

Tags: Code Review, practical experience, peer programming, Programmer Statement: This article was first published on bole online after I translated it. Please mark the original position for any form of reprinting. Millions of years ago, ape rose from the tree and evolved into a human being. From a similar perspective, we look at code review: It seems like something that can separate humans from the beast in

-theft chain.If-modified-since: Typically used with header last-modified in response to find local cacheRequest Body:encapsulates the submission parameters of the Post submission method(3) The response part of the HTTP protocolserver: sends a response to the client Response Line:* Protocol version* Status Code:* 200: Success* 302: Redirect* 304: Find local cache* 404: Resource does not exist* 500: Server Internal Error* Status Code descriptionresponse Header: key value pair, usually a key corres

Sixth chapter One-dimensional array 1 array initialization syntax array initializer2for each Loop3off-by-one error is usually used in the loop where the 　　 Java Programming Basics Review notes Unit sixth

>=val e=mid-1S=0 e=0 mid=0 *midFind 3 s=0 e=2 m=1 *mids=2 e=2 mid=2 *mid>=val e=mid-1 return s=2The feature of this method is that the mid and Val comparisons are >= and return is the startThe description returns a location that is not less than the minimum value of ValYes_right Find 2.s=0 e=2 m=1 *mids=2 e=2 mid=2 *mid>val e=mid-1 return e=1If you are looking for 3 s=0 e=2 m=1 *mids=2 e=2 mid=2 *mid>val e=mid-1 return e=1This method is characterized by the mid and Val comparisons, which are ret

();for (int i=1;iString s = "" +i;print (s);s = string.valueof (i+1);print (s);s = "" + (int) Math.pow (i, i+1);print (s); System.out.println ();}}}2.25Import Java.util.Scanner;public class Exercise {public static void Main (string[] args) {System.out.print ("Enter The time zone offset to GMT:");Scanner Scanner = new Scanner (system.in);int I=scanner.nextint ();Long Second=system.currenttimemillis ()/1000-3600*i;int sec = (int) (SECOND%60);second/=60;int min = (int) second%60;second/=60;int hou

Foreplay: The concept of processes and threadsIf you learn Linux under the process, thread, signal ... will have a deeper understanding. So the recommendation to learn, including network programming can be understood, especially for Select,pool,epool will have more understanding.A process is the smallest unit of resource management, and a thread is the smallest unit of program execution. A program can have multiple processes, and a process can have multiple threads executing concurrently1. Proce