pros and cons of mongodb

Reference Answer:In iOS, it is usually uiwebview to implement, of course, after iOS8 can use Wkwebview to implement. There are several ways to do this: By implementing the UIWebView proxy method to intercept and determine if scheme is a good deal, then iOS calls the local related API to implement: 123 - (BOOLwebview: ( Uiwebview *) Webview Shouldstartloadwithrequest: ( Span class= "crayon-t" >nsurlrequest *) Span class= "crayon-v" >request Navigationtype: (uiw

receive traffic httpclient maximum, httpurlconnection and volley the same, okhttp slightly larger than the former two.5, the average time-consuming networkError description: The condition of the network may affect the network request time.Conclusion: The average time of network request is httpclient maximum, the httpurlconnection is the smallest, and the volley average is higher 10ms~20ms,okhttp than volley 20ms~40ms.The final conclusion is drawn:1 , for new applications, you should be more inc

of mobile terminal (voice, camera, SMS, GPS, Bluetooth, gravity sensor, etc.)(5) The app updates new features that involve submitting audits to each store every time.Suitable for enterprises: games, E-magazines, management applications, the Internet of things, etc. without the need to constantly update the application framework of the app.Mobile Web is ubiquitous, mobile web is currently the only platform to support a variety of device access, like the desktop web, mobile Web support a variety

; } @SEX Public intGetsex () {returnsex; } PublicString getsexdes () {if(Sex = =MALE) { return "male"; } Else { return "female"; }}} @IntDef ({MALE, FEMALE}) @Retention (Retentionpolicy.source) Public@interface SEX {}}If we try to pass a value that is not within the limit when we call the Setsex () method, then the compilation will not pass and there is an error message. Similarly, we can also use @stringdef.As we can see here, @SEX annotations can be placed on attribut

Advantages of CSS Sprites: 1. Reduce the byte of the picture 2. Reduce the HTTP request of the webpage, which greatly improves the performance of the page.3. Solve the problem of Web designers in the name of the picture, just a set of pictures on the name on it, do not need to name every small element, thus improving the production efficiency of the page.Disadvantages of CSS Sprites:1.CSS Sprites in the maintenance of time is more troublesome, if the page background has a little change, generall

of speed at all.⑵ is both an advantage and a disadvantage, Python's open source makes the Python language can not be encrypted, but the current domestic market purely by writing software to sell customers less and fewer, web sites and mobile applications do not need to give customers source code, so this problem is the problem. But over time, many domestic software companies, especially game companies, also began to scale using him.There are too many options for the ⑶ architecture (there is no

= Moviehandler () parser.setcontenthandler (Handler) parser.parse ("Movies.xml") def foo ( Bar=[]): # Bar is an optional parameter, if not specified, the default value is []bar.append ("Mky"); # But there's a problem with this line, and I'll see ... return bar;print foo () print foo () odd = lambda X:bool (x% 2) Nums = [n for n in range (]nums[:] = [n for n-nums if not odd (n)] # Ah, this beautiful print nums This example is primarily for sax_xml reading, as well as defining parameter defaul

Advantages:1, save the configuration, reduce the configuration file size2, compile to see the correct or not, improve efficiencyDisadvantages:1, increase the coupling of the program, because the annotations are stored in the class file, and more scattered2. To make modifications to the configuration requires recompilationThis article is from the "ten-li Rice flower" blog, please be sure to keep this source http://5880861.blog.51cto.com/5870861/1594035Java Annotations

Solution Solutions Advantages Disadvantages Jacob Powerful features Direct call to the VBA interface, the program is very complex, the server must be: Windows System + Office installation, server-side Automation COM interface prone to death process caused by server downtime Apache POI Powerful operation on Excel; cross-platform The ability to manipulate word is weak; You must write different code for DOC and docx two document formats; p

varReg =NewRegExp ("(^|)" + name + "= ([^]*) (|$)", "I"); Console.log ("location.search===" +Location.search); //substr (1): Extracts some characters from the first position of a stringConsole.log ("location.search.substr (1) = = =" +location.search.substr (1)); //match (): Retrieves the specified value that matches the regular expression within the string, returning an array to rConsole.log ("Window.location.search.substr (1). Match (reg) = = =" +window.location.search.substr (1). Match

interface, using the thread class's CurrentThread () to get the current thread object Try{Thread.CurrentThread (). Sleep (100); } Catch(interruptedexception e) {e.printstacktrace (); } System.out.println (Name+ ": " +i); } } } StaticFuturetaskNewFuturetaskNewCallable() {@Override PublicString Call ()throwsinterruptedexception {String name= ""; inti = 0; for(; i ) {Name=Thread.CurrentThread (). GetName (); Thread.CurrentThread (). Sleep (100); SYSTEM.OUT.PRINTLN (Nam

This article mainly introduces JavaScript to create a closure of the two ways of the pros and cons of the analysis of the relevant data, the need for friends can refer to the Usually javascript creates closures in two different ways. Constructor method: ? 1 2 3 New function () {var variable ...} Inline execution Mode: ? 1 2 3 (function () {var variable ...}) (

, and so on exactly what, you should use MySQL. 3, if your application to the integrity and seriousness of the data requirements is not high, but the pursuit of high speed processing. For example, it is a forum and community where you should use MySQL. 4, your application is a serious business application, the data integrity requirements are high. And you want to have a good encapsulation of some business data logic, such as an online bank, you should use PostgreSQL. 5, your application is deali

distribution that's right for your desktop, and if you don't want to customize anything yourself, and you don't want to waste too much time on your system, it's easy, You choose according to your hobby in Ubuntu, Kubuntu and Xubuntu, the difference of the three is only the desktop program is different.If you need a server system, and you are very tired of the various Linux configuration, just want a more stable server system, then your best choice is CentOS, after the installation, after a simp

the MFC SDK for free.QT is free to get its GPL-compliant version on UNIX (note: The GPL version is now available for free on Windows). If you want to develop software that is unfair to open source code, you must purchase QT authorization. Under specific platforms, each developer buys a permanent license and receives one year of technical support. (Translator Note: After the purchase price and other issues to be deleted, because the price is not fixed, if in doubt, please go to the official webs

pointed to the object that created the current instance. Console.log (P5 instanceof Child4, p5 instanceof parent4); The result is the same, and P5.constructor is not child4 but parent4.5. Combinatorial inheritance optimization 2--parasitic combined inheritance functionparent5 () { This. Name = ' PARENT5 '; This. play = [1, 2, 3]; } functionchild5 () {Parent5.call ( This); This. Type = ' Child5 '; } Child5.prototype=object.create (Parent5.prototype); Child5.prototype.constructor=Child5

Due to not how to contact Oracle so did not answer this question, now after the data summarized below. Later have the opportunity to learn to learn Oracle, do not know how the written test, I hope God did not go to the WC. Pros and cons of hot and cold backupsThe advantages of hot backup are:1. Can be backed up at the table space or data file level for short backup time.2. The database is still available f

include| Safety | Safety |include| Safety | What are the pros and cons of security include? Do you know that include can contain the file itself? Yes. You can even include several times. The only limit is: You can't let a contain B, and B contains a. Such a loop inclusion is not allowed. Another question is, can those files contain other files? In fact, by setting up IIS, you can allow any file type to use

, he may become a car industry experts. But in fact this is rare, and many architects may face another new project, such as you used to make a car, and now you do finance, what do you do. So our general practice is that if a large company, a large team, we will have specialized field experts, by the domain experts to take charge of the business this piece, or by the customer to take charge of the business this piece. But our architects also have to have a certain understanding of the business, a

aborts, the cluster returns a deadlock error code (error:1213 sqlstate:40001 (Er_lock_deadlock)).(7). XA transactions are not supported due to possible rollback on commit.(8). The write throughput of the entire cluster is limited by the weakest node, and if one node becomes slow, the entire cluster will be slow. For stable high-performance requirements, all nodes should use unified hardware.(9). Cluster nodes suggest a minimum of 3.(10). If there is a problem with the DDL statement, the cluster