api design best practices

Today we will mainly talk about the DB2 Performance Tuning design and configuration of your database. There are many database design and configuration options that can affect the query performance. For more suggestions on Database Design, see the "Planning your Physical Database Design" Best

system extensibility through package Changes. In the traditional object-oriented language, a program that uses a template method pattern, the class of the subclass and the order of execution are constant, so we abstract this part of the logic into the parent class template Method. The method of how the subclass is implemented is mutable, so we encapsulate the logic of this part of the change into Subclasses. By adding new subclasses, We can add new functionality to the system, without altering

is not perfect Design up from the mobile side @media All and (min-width:320px) {}@media All and (min-width:768px){} To get Better browser support, And can reduce the complexity of CSS files 5. Create a core experience6. Determine the breakpointTraditional approach: use some fixed standard widths: 320px (iphone and some other devices), 768px (ipad) and 1024pxThe problem is that devices that are between these

Field-driven design practices-DDDLite-based permission management and dddlite permission management Search for "permission management" in the garden to get at least thousands of valid records. I remember that writing a general permission system was always my dream at the beginning of my work. In the middle, the job is busy (in fact, it is just lazy !) And so on. Recently, when I write my own things, many of

executed, which can also be done with a history list stack. Logging command logs and then repeating them is a good way to reverse an irreversible command.Command queueMacro command:A macro command is a collection of commands that can execute a batch of commands at a time by executing a macro command. varClosedoorcommand ={execute:function() {Console.log (Closed); } }; varOpenpccommand ={execute:function() {Console.log (' Turn on the computer '); } }; varOpenqqcommand ={execute:fu

object in an interface, can execute different objects method, equal to the director said a boot, the rest of the people can do their own thing.Here we assume that the object has an Execute method, if the object does not have a common method, it can also add one to the object, if the object is created by new way on the prototype chain, if not through new, directly add1 //The New Way2Menubar=NewMenubar ();3Menubar.prototype.execute=function(){4 This. Refresh (); The methods that really need

the Addevent function is entered:1 varAddevent =function(Elem, type, handler) {2 if(window.addeventlistener) {3Addevent =function(Elem, type, handler) {//the difference between this and the previous scenario is that it rewrites itself.4Elem.addeventlistener (type, Handler,false );5 }6}Else if(window.attachevent) {7Addevent =function(Elem, type, handler) {8Elem.attachevent (' on ' +type, handler);9 }Ten } OneAddevent (Elem, type, handler);//This will only be performed the

the adorner mode is intended to add functionality to the Object. The decorator pattern often forms a long decorative chain, while the adapter pattern is usually packaged only once. The proxy mode is to control access to objects and is usually wrapped only once. The function of the appearance mode is similar to the adapter, Some people regard the appearance pattern as the adapter of a set of objects, but the most notable feature of the appearance mode is the definition of a new interface.

Analysis of Android source code design patterns and practices (23rd)Chapter 2 appearance Mode The appearance mode is one of the structural design modes. It is frequently used in development and is a common method for encapsulating APIs. Third-party sdks we often use are basically used in the appearance mode, which can shield users from many implementation detai

The original idea is to teach you how to use AgileEAS step by step. NET base library for application development-articles related to the series of directories to gradually explain Based on AgileEAS. NET platform for application development, but in the case of the process, we have to talk about AgileEAS. in terms of Architecture Design for application development on the NET platform, I will separate some articles related to the architecture. I am based

Analysis of Android source code design patterns and practices (19th)Chapter 2 combination mode The combination mode is also called the partial-overall mode, one of the structural design modes. 1. Definition Combine objects into a tree structure to represent the "part-whole" hierarchy, so that users can use a single object and a combination object in a consisten

Quotation marks are used as extracts of accent text. Because we need to provide some important flags to use the user's attention to the most important part of the article, although they never read it. In addition, quotes are always used in thank-you notes and sometimes in blog comments, and they may be styled with graphics, CSS, and a bit of JavaScript. Sometimes, creative dynamic solutions can also be applied well. This post includes creative examples and best

Use Axure RP prototype design practices 04 to understand global variables and axurerp A variable is a variable number and can be considered as a data container. A variable has two operations: read and write. Axure's global variable refers to the ability to read and write this variable at any time. Click Global Variables under Project in the toolbar. You can set Global Variables here. You can see t

In web development, because differences between browsers are implemented differently, some sniffing work is unavoidable, such as the fact that we need to be able to use the universal event binding function in each browser addevent//General Wording//Cons: Every time he is called, it executes the IF condition,varAddevent =function(Elem, type, handler) {if(window.addeventlister) {returnElem.addeventlistener (type, Handler,false); } if(window.attachevent) {returnElem.attachevent (' on ' +type, ha

Analysis of Android source code design patterns and practices (10)Chapter 10 interpreter Mode The interpreter mode is a relatively small behavior mode, which provides a syntax or expression method for interpreting languages. However, it is widely used, but it is rarely used because we seldom construct the grammar of a language. 1. Definition Given a language, it defines a syntax expression and an interpre

[teamcolor]| | [];//all members of the team for(vari=teamplayers.length-1;i>=0;i--){ if(teamplayers[i]===player{Teamplayers.splice (i,1); } } }; //Players Change Teamoperations.changeteam=function(Player,newteamcolor) {operations.removeplayer (player); Player.teamcolor=Newteamcolor; Operations.addplayer (player); } //player DeathOperations.playerdead=function(player) {varTeamcolor=Player.teamcolor, Teamplayers=Players[teamcolor]; varAll_dead=true; f

your program.3. When the const and NON-CONST member functions have a substantially equivalent implementation, making the NON-CONST version call the const version avoids code duplication . Article 01: Treat C + + as a language federalWater and electricityArticle 01: Treat C + + as a language federalWater and electricityArticle 01: Treat C + + as a language federalWater and electricityArticle 01: Treat C + + as a language federalWater and electricityArticle 01: Treat C + + as a language federalWa

, which is a bit around, for the following notationConsole.log (object.prototype= = =object.__proto__.__proto__ ); // true to see that the prototype object of object is the prototype of its prototypeWe have said that the prototype means cloning inheritance, that is, object around a circle to inherit its own prototype object, the prototype chain should be a chain, __proto__ connected to inherit the object, prototype to others, and object here a knot, this particularity shows its special statu

the work of creating nodes in batches, such as creating 1000 nodes in 1 seconds, instead of creating 8 nodes every 200 milliseconds. varTimechunk =function(ary,fn,count) {varobj, t; varLen =ary.length; varStart =function(){ for(varI=0;i){ varobj =Ary.shift (); FN (obj); } }; return function() {t= SetInterval (function(){ if(ary.length ===0) {//If all the nodes have been Created. returnclearinterval (t);

strong exception security, you can't throw an exception here.(2) for class or this template should provide a non-member swap to call member swap. A completely special std::swap should also be provided for class.(3) Call swap, using a using-declaration, so that Std::swap exposes the courseware within your function, and then uses swap without any namespace modifiers.(4) Std namespace for "user-defined type" is good, but do not include STD in the new thing.C + + We have to be familiar with the spe