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NodeJS-based Promise-based shard skin read/write MongoDB

NodeJS-based Promise-based shard skin read/write MongoDB Promise is an asynchronous programming code writing method. Like the Async module, Promise can improve code readability and maintainability. Async encapsulation is better than Promise, but the flexibility, especially the thorough CallBack conversion, is worse than Promise. The source code is directly pasted below, and the comments are very detailed:(1

Cisco policy-based routing based Configuration instance

Problem description You can define your own rules for routing packets, not just the destination address. Over here You can learn how to use policy-based routing to solve this problem. In a specific application, policy-based routing is: ☆ Policy Routing based on source IP address ☆ policy-based routing

Azure ARM (16) Role-based access controls (role Based access control, RBAC)-Using the default role

Tags: ons arm ie browser log important HTTP Add Resource AdminWindows Azure Platform Family of articles Catalog   This morning has just communicated with the customer, the strike to write a blog. Readers familiar with the Microsoft Azure platform know that in the old classic portal, we can set up co-administrators (Co-admin). Reference: Windows Azure Active Directory (3) China Azure AD adds new users    However, the Co-admin and Service Admin permissions are the same. For example, any resource

Azure ARM (17) Role-based access controls (role Based access control, RBAC)-Custom role

://docs.microsoft.com/en-us/azure/active-directory/role-based-access-control-custom-roles#notactions   Two. Through PowerShell, view the appropriate action   We know that there are a lot of services in Azure arm, such as Azure Storage, Azure Virtual machine, Azure SQL database, and so on. There are a lot of things to do, like Read, Delete, list, and so on. If you need to know each individual service and the appropriate steps, we need to query the app

Javascript-based simple tip plug-in-javascript based on regular expressions

This article mainly introduces the simple prompt plug-in based on regular expressions. it is a text box detection plug-in with strong compatibility but lightweight files. we recommend this plug-in for your reference. This article describes the simple tip plug-in based on regular expressions and shares it with you for your reference. The details are as follows: This is a simple prompt plug-in that implements

Based on thinkphp, it can be used to determine geographical locations based on users' ip addresses and provide corresponding weather information.

Based on thinkphp, it can be used to determine geographical locations based on users' ip addresses and provide corresponding weather information. We all know that many websites provide weather forecasts for users. Sometimes, even if users do not enter any geographical location information related to themselves, the same website can also determine the geographic location and display the weather information.

Guide to porting Android ndk-based applications (android ndk-based libs/x86)

Summary Introduction Learn about Android for x86 Ndk compilation tool Compile Check apk Install a simulator Debug apk IntroductionDear developers, Android tablets Based on INTEL x86 architecture are coming soon. Please read this article carefully to make your applications run properly on x86 devices. Understanding Android for x86 (1) And TraditionalAndroid Application Development? Development methods and ideas Development Tool Set Devel

Implement distributed locks Based on Redis and distributed locks Based on Redis

Implement distributed locks Based on Redis and distributed locks Based on Redis BackgroundIn many Internet product applications, some scenarios require locking, such as seckilling, global incremental ID, and floor generation. Most solutions are implemented based on databases. Redis adopts the single-process and single-thread mode and uses the queue mode to conver

Object Tracking Based on particle filter and Object Tracking Based on Particle Filter

Object Tracking Based on particle filter and Object Tracking Based on Particle Filter First: Rob Hess (http://web.engr.oregonstate.edu /~ Hess/) to implement this particle filter. Starting with the code, we can understand the principles of particle filter. According to the introduction of particle filter on Wikipedia (http://en.wikipedia.org/wiki/Particle_filter), particle filter actually has many variant

Map-based workflow designer and map-based business process handling interface (I)

Map-based workflow designer and map-based business process handling interface (I) Bytes ----------------------------------------------------------------------------------------------- Online Demo address in this example (Because the database cannot be connected to the Internet, only one static version is provided here) Http://silverlight.services.live.com/invoke/71234/map/iframe.html Bytes -------------

Magnostics image-based Search of interesting matrix view for Guided network Exploration (a web-based approach to network information matrix images)

Network, relationship and other data into the adjacency matrix (red represents two nodes is a person, there is a link between), but the resulting matrix will be due to the order of the problem of the different arrangement, in the first will find that because there is a clustered block area and easily divide the data into two parts, Then according to the specific meaning of the data to know the meaning of its representative, in this figure can be seen as two groups.When the data is analyzed, it i

Fine-grained role-based access control based on Struts 2 interceptor

Introduction As the most successful MVC Web framework, Apache struts has long been widely used, but it exposes a lot of drawbacks, which leads to struts 2. Struts 2 abandoned the original struts 1 design, but turned to the WEBWORK2, and combined with the advantages of struts, trying to create a set of the perfect WEB framework for the director of the public house. Struts 2 also has a very important feature in WEBWORK2-interceptors (Interceptor). Interceptors are performed before and after Actio

Code-based javascript Translation Based on Kingsoft Mac _ javascript skills

The following code is based on the interface provided by Kingsoft Mac network translation. Remote File calling can be used as a custom online query tool. : Note that the following code should be saved in UTF-8 format to avoid garbled characters. The Code is as follows: Javascript Kingsoft online network Translation

Javascript-based auto-match of input boxes of Baidu-based imitation _ javascript tips-js tutorial

This article mainly introduces information about the javascript-based auto-matching function of Baidu input boxes, for more information about how to use javascript to automatically match a Baidu input box, the following shows the matched content. The Code demonstrates how this function is completed. Of course, this is static. You can read the prompted content from the database, I would like to share with you about AJAX. The specific content is as foll

Jquery-based finkyUI plug-in and Ajax-based page data loading function _ jquery-js tutorial

The finkyUI plug-in based on jquery and Ajax implement the page data loading function. For more information, see. The Code is as follows:

SVM-based pedestrian recognition training based on opencv

+ AdaBoost is still good. We have done pedestrian recognition and the classifier is trained on its own, as in 18 stages, 640x480. if you do this in dm8148 or dm8168, it should be very practical. If it is a pure DSP, it was previously made on dm6437, and it seems that the speed is not very good. At present, I am studying the dm8148 architecture, which is similar to OMAP or dm3730. I have some more openmax and so on. It is estimated that it takes care of Android development users. I still like to

One of the beginners of j2-based technology-the development process of j2-based programs

speed. A pre-approval command is provided in the J2EE development kit. during compilation, the general development tool automatically performs this operation. 4. Run the pre-reviewed class file in the simulator to view the effect and debug the file. If you need to modify the file, return the first step again. Generally, development tools include simulators. You only need to "run" the program, and the development tool automatically starts the simulator to run. 5. If the program runs in the simul

Apache configures the port-based virtual host Apache Virtual Host Configuration is based on the port

There may be only one IP outlet, but there are multiple projects, then you need to set up a virtual host based on the port number. Step 1: Check whether the httpd-vhosts.conf is enabled Apache/CONF/httpd. conf file # Virtual hostsInclude conf/extra/httpd-vhosts.conf If it is not enabled, it must be in httpd. CONF file; if enabled, you can set in Apache/CONF/extra/httpd-vhosts.conf file, of course, you can also httpd. the configuration in the conf file

PHP-based webpage jump judgment based on user language

When the visitor's browser language is Chinese, the PHP code is displayed on the English page when the user's default browser is not Chinese. When the visitor's browser language is Chinese, the Chinese version is displayed. if the visitor's browser is not Chinese by default, the English page is displayed. PHP code: $ Lan = substr (? $ HTTP_ACCEPT_LANGUAGE, 0, 5 );If ($ lan = "zh-cn ")Print (" ");ElsePrint (" ");?> The HTML page automatically redirects to the mul

Jquery-based custom web-based rich text editor with source code download _ jquery

UEditor has very powerful functions. it has been officially equipped with php, asp, asp.net, java and other language Upload programs for use. of course, ueditor has more function plug-in interfaces, you can easily add your own defined functions to the editor to facilitate different project requirements. Today, we will introduce you to a great WEB-based rich text editor, UMeditor, it is a mini editor developed by Baidu web front-end R D department and

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