mongodb 3 6 features

ArticleDirectory Enhanced Data Functions Higher performance and higher resource management efficiency Local Code interoperability is reconstructed SQL Server 2005 compact Edition Ajax Fewer software to be installed Support for URL-based Deployment Code signing is simplified New features provided by Windows Mobile 6 for developers (2) Other controls The control me

The Windows 8 system does take some time to adapt, although desktop app running mode is similar to Window 7, but there are a lot of new shortcuts, options and tricks embedded in the operating system. Do you think you'll be using Windows 8 altogether? Here's a little bit about Windows 8 features that you probably haven't found yet. 1. Hidden Start Menu Microsoft uses a Dynamic Tile app page to replace the original starting small sphere in

promise is a very simple concept, and even if you don't have a chance to use it, chances are that you've learned about it. Promise is a valuable constructor that can help you avoid using nested anonymous methods and assemble asynchronous code in a more readable way. Here we will introduce the 6 simplest features that we would like to help you with. Before we begin our formal presentation, we'd like to look

-family: blackbody; color:red}4. The weight of the style:P and. First are matched to P on this tab, so what color does it show? Green is the right color, then why? This is because the browser uses the weights to determine which CSS style to use, and which CSS style to use when the weights are high.Here are the rules for weights:The weight of the label is 1, and the weight of the class selector is 10,id the maximum value of the selector is 100. For example, the following code:p{color:red;} / * We

-sharding.:: This package provides the MONGO shell, import/export tools, and: Other client utilities.3. Installing MongoDB server side and client tools[email protected] geffzhang]# Yum install Mongo-10gen-server[email protected] geffzhang]# Yum install Mongo-10gen4. Start MongoDBService Mongod StartUpdated later, stop MongoDB, execute yum update Mongo-10gen mongo

conflicts between functions and classes. A namespace is a method that prevents your functions, classes, and methods from being read due to name conflicts between functions or classes, rather than Prefix naming conventions. Therefore, by using a namespace, you can name a class name that someone else may already use, without worrying about errors during running. The following provides an example of using a namespace in PHP. ﹤?php// I'm not sure why I would implement my own XMLWriter, but at leas

At the end of 2006, Sun company released the final official version of Java Standard Edition 6 (Java SE 6), code-named Mustang (Mustang). Mustang has a good performance boost compared to Tiger (Java SE 5). Compared with Tiger's significant enhancements to the API library, although Mustang's new features in the API library appear to be few, it also offers a number

Inheritance of three features of object-oriented (extends) -- Java notes (6), extendsjavaInheritance: a general-to-special relationship is an extended relationship. The subclass object is a type of parent class, also known as the generalization of the "is a" link: the process of extracting the commonalities in the subclass into the parent class is special: The subclass defines its unique behavior feature pr

: Getdeclaredfiedlds () getdeclaredmethods () ...Returns all properties or methods (Public/protected/default/private), but does not include inherited properties and methodsPractice:The class name represented by a data structure (Collection) is passed through the command line, which dynamically creates the object of the Class (New ArrayList ()) through the reflection mechanism, puts several objects into the data structure, and then traverses the object information in the output data structure.Exa

, and MongoDB almost supports most queries in SQL. (5) Powerful aggregation tools. In addition to providing rich query functionality, MongoDB also provides powerful aggregation tools such as count, group, and so on, supporting the use of mapreduce to accomplish complex aggregation tasks. (6) Support replication and data recovery.

High-performance MySql evolution (6): the principles and features of common index types are well known. The impact of indexes on database performance is crucial, but why can indexes improve query efficiency, and the types and features of indexes may not be very clear. This article will give a brief introduction to common index types and

C #6 new features make your code cleaner,Preface When I saw a friend's blog a few days ago, I saw that he used the features of C #6, but I haven't seen it for so long. Now I have read new features, to put it bluntly, it's just syntactic sugar. But it can make your code clean

barrier for developing excellent mobile applications. Now we need to consider how to make full use of the advantages of html5. Next, let's take a look at the new features developed by html5. IPhone 5: New screen sizeNew SimulatorWhat you need to doProblemNew Features of iOS 6: File Upload, access with a media capture camera, and file APINetwork Audio APISmart Ap

One of the new features of JDK 6: http://blog.csdn.net/Chinajash/category/258847.aspx? Pagenumber = 2desktop and systemtray y9b} ezawih In JDK 6, two classes are added to AWT: desktop and systemtray. The former can be used to open the specified URL in the default browser of the system and open the default mail client to send emails to the specified mailbox, use t

overhead, and improve system efficiency. package compile; import java.util.Date; public class Target {public void dosomething () {Date da Te = new Date (10, 3, 3); This constructor is marked as deprecated, and the compile time//error output information. System.out.println ("doing ..."); }} package compile; Import javax.tools.*; Import Java.io.FileOutputStream; public class Compiler {p