advantages of using mongodb

Yesterday in the application was asked by HR, what are the advantages and disadvantages of hibernate? Now try to summarize the following, please give us a supplement, fix!Advantages:1. Object/relational database mapping (ORM)2, the code is simple, does not need to write the SQL statement (does not need to edit the JDBC), only needs to manipulate the corresponding object to be possible, can be able to store,

This article mainly introduces the advantages and disadvantages of the two methods for creating a closure in JavaScript and the related information for difference analysis. If you need it, you can refer to the two methods that are commonly used to create a closure in JavaScript. Constructor method: New function () {var variable ...} Inline execution method: (Function () {var variable ...})(); What are their differences in the JavaScri

This article mainly introduces the advantages and disadvantages of the two methods for creating a closure in JavaScript and the related information for difference analysis. if you need it, you can refer to the two methods that are commonly used to create a closure in JavaScript. Constructor method: New function () {var variable ...} Inline execution method: (Function () {var variable ...})(); What are their differences in the JavaScri

What are the advantages of using a background map to make a page in CSS ?Briefly introduce the advantages of CSS Sprites:When the user to the U disk to copy 200 pictures, will wait a long time. But if you make a file, copying it will be much faster.The goal of CSS Sprites is to speed up page loading by consolidating images, reducing the number of requests to the

performance of the system during the query process. Someone might ask: Why do you not create an index for each column in the table because there are so many advantages to adding an index? This kind of idea certainly has its rationality, but also has its one-sidedness. Although indexes have many advantages, it is unwise to add indexes to each column in the table. This is because there are a number of down

session| variables Many people use session variables to develop ASP (Active Server Pages). These variables are very similar to variables that are common in any programming language and have the same advantages and drawbacks as common variables. Any command requires run time and storage space (even Goto ' s statement), and the session variable also needs its own run-time and storage space. Excessive use of Session variables can result in code redundanc

Advantages and disadvantages of creating closures using JavaScript This article mainly introduces the advantages and disadvantages of the two methods for creating a closure in JavaScript and the related information for difference analysis. For more information, see There are usually two common methods for creating closures in JavaScript. Constructor method: ?

This is one of my answers on zhihu. The original Article is here: http://www.zhihu.com/question/20001972/answer/15572624. I have never used xcode to develop specific projects. My mobile development experience is mainly Android SDK, air for Android, and air for IOS. Due to the limitations of development experience, I cannot accurately describe the advantages and disadvantages of xcode. Here we only analyze it based on my android development experience

Internet Explorer or Netscape Navigator, you are almost always working with CSS, and Web pages that do not use CSS on the web may not be easy to find. No matter what tool software you use to make Web pages, you are using CSS intentionally or unintentionally. With good CSS can make your Web page more conciseness, the same content of the page, some people do it has dozens of KB, and the master made to only more than 10 KB.Div+cssThe

, Li:last-child//For List of items[HTML] view Plaincopyprint? Li:nth-child (2n+1)//First "1" Li element, each "2" color is red color:red; } p::first-line{color:red;}//The first line of text is redFive: Richer CSS3Traditional CSS to achieve rounded corners, shadows and other effects, generally with the help of pictures to achieve, using CSS3 instead of pictures, can effectively reduce the HTTP request

Using spring to integrate hibernate makes access to the persistence layer easier. Using spring to manage the persistence layer of hibernate has the following advantages. · General resource management: Spring's applicationcontext can manage sessionfactory, making configuration values easy to manage and modify without using