In Erlang programming practice, most of the time is dealing with the list: Taking the Header element, traversing, matching... Why does Erlang and other functional programming languages have a special liking for the list? The referential transparency is referenced in Appendix B of Erlang and OTP in action ).
The following text is excerpted from Wikipedia:
Referential transparencyAndReferential opaquenessAre properties of parts of computer programs. an
Ranch is a TCP processing program framework. The official explanation of ranch is a socket acceptor pool for TCP Protocols. It aims to provide a convenient, easy-to-use, efficient, and stable basic TCP processing program. I also used it as the basis to write a simple chat program. The underlying communication processing of cowboy is also ranch processing, and dozens of files are used as the basic HTTP server. Today, let's see what magic it has. There is not much nonsense. I will analyze it in th
', N 'column ', n' RatioUp'GOExec sp_addextendedproperty N 'Ms _ description', N 'username', N 'user', N 'dbo', N 'table', N 'useraccounts', N 'column ', N 'username'
GO
Ftp. cs code:
Using System;Using System. Web. Security;Using System. Configuration;Using System. Data;Using System. Data. SqlClient;
Namespace host{/// /// Ftp summary./// Public class ftp{Private SqlConnection conHost;
Public string UserName; // User NamePublic string Password; // PasswordPublic bool Disable; // Disabled Accou
generator of Deep Freeze is installed, we need to use the installed software to generate console and client programs.Choose "Start> program> Faronics> Deep Freeze Enterprise> Deep Freeze Administrator", start the generator, select "Configuration", and set the client password. Next, select "Frozen Drives" and select the disk partition to be protected. Select "One Time Passwords", enter the "Token" at will, and then select "Generate OTP" to Generate th
Installing Rabbit MQRabbit MQ is built on the powerful Erlang OTP platform, so installing Rabbit MQ is premised on the installation of Erlang. Download the installation from the following two connections 3.2.3 version:
Download and install ERALNG OTP for Windows (VR16B03)
Run Install Rabbit MQ Server Windows Installer (v3.2.3)
The default installed rabbit MQ listening port is 5672Activate
hierarchy at the top of the line layer protocol: the AMQP model. This model unifies the message pattern, such as the previously mentioned publish/subscribe, queue, transaction, and streaming data, and adds additional features such as easier to scale, content-based routing. Install the Rabbit MQ Guide on Windows, preferably the Rabbit MQ Windows installation guides, which also includes access Rabbit using the. NET rabbitmq.client Nuget Package Example code for MQ. Installing Rabbit MQ Rabbit MQ
With Cowboy This library, there is no log function, so the OTP provides a log function.1. How to start SASLerl–bootstart_sasl默认配置文件下启动SASL,{env,[{sasl_error_logger,tty},{errlog_type,all}]},,见源码sasl.app文件。Erl-boot start_sasl-config xxxx.config Start the specified configuration file such as Elog1.config, Elog2.config ... The configuration file default directory is Ebin, and you can specify the directory yourself.You can also use Application:start (SASL)
One, log filesA ejabberd node writes two log files:Ejabberd.logEjabberd service logs, messages reported by the Ejabberd nodeerlang.log ERLANG/OTP system log, messages reported by ERLANG/OTP using SASL (System architecture Support Library)Option LogLevel Modify the verbosity of the file Ejabberd.log. The syntax is:{loglevel, Level}.The possible level is:0No ejabberd log (not recommended)1 Critical2 Error3 Wa
MotivationThe last few weeks of the interview failed, should be left the impression of empty talk. Look at the resume on the career plan "to prepare for operating system-level, language-level computing infrastructure ," deeply proud of himself.A blown cow is a tear to be done.AudienceMyselfScopeOS-level processes, Threads: apueShared-in-memory parallelism: Java (Python), POSIX threads, OPenMPDistributed memory parallelism: MPI, Erlang (populated with Erlang
This is a creation in
Article, where the information may have evolved or changed.
Http://blog.sina.com.cn/s/blog_6e1bd8350102uwgl.html
Rainy weekend, suitable for the season of the code word ...
A year ago, when I began to learn the go language, unsanitary environment, both Python coding efficiency and 15 times times the performance improvement. Especially in the area of asynchronous programming, you can use channel synchronization threads, without locking can make full use of CPU multi-core com
This is a creation in
Article, where the information may have evolved or changed.
Give yourself a retreat and compare Erlang and Golang again.
2014-6-28
Chen Yehao chenyehao@gmail.com
Rainy weekend, suitable for the season of the code word ...
A year ago, when I began to learn the go language, unsanitary environment, both Python coding efficiency and 15 times times the performance improvement. Especially in the area of asynchronous programming, you can use channel synchronization threads, witho
scenariosHow does Erlang come from? Grammatical strange, functional, look "ugly" to a lot of people do not like to use, but why many people also "boast" Erlang (I belong to the "boast" that the ticket person)?Brief HistoryErlang appeared in the mid 1980s and was developed by a laboratory under the jurisdiction of Ericsson, a Swedish telecommunications equipment manufacturer. That was the vote. In search of a programming language suitable for next-generation telecom products, Ericsson Labs spent
The main advantage of Erlang lies in multi-core programming and powerful and highly available programming.ProgramIt is inseparable from the OTP framework. The main behavior pattern gen_server in OTP, although named as a common serverCodeIt is not inherently capable of processing concurrent requests. In fact, a module written by gen_server runs in a thread, and all requests targeting it are serialized, there
What is Erlang?A "niche" language (ranking more than 50)
A functional language (a variable can be assigned only once)
A dynamic type language (the variable type is determined at runtime,CodeIt must be compiled before execution. It is different from Python and Ruby)
A strong language
A concurrency Oriented Language
Storm in a cup (published in 《ProgramClerk, issue 9 and 10), and the large-scale multiplayer online system that easily achieves scalability, fault tolerance, and load bala
ObjectiveRecent projects to use RABBITMQ, the park has a lot of excellent articles, RABBITMQ official website also has. NET instances. Here I try to record the use of the process in the form of the text and Mao.InstallationRABBITMQ is built under the Erlang OTP platform, so you need to download and install the following two components under Windows:1. Erlang OTP for Windows2. Rabbit MQ Windows Service Insta
A complete example of C # RabbitMQ operations,
1. Download RabbitMQ
Http://www.rabbitmq.com/install-windows.html
Ii. Download OTP
Http://www.erlang.org/downloads
3. Install OTP and RabbitMQ
4. Configure RabbitMQ
Find the bat directory
Execute related commands
1. Add User PasswordRabbitmqctl add_user wenli
2. Set wenli as AdministratorRabbitmqctl set_user_tags wenli administrator
3. Start RabbitMQ web
Git currently accounts for a large proportion of the source code management field, and many open-source projects have been transferred to GitHub. For example: jQuery, reddit, Sparkle, curl, Ruby on Rails, node. js, ClickToFlash, Erlang/OTP, CakePHP, Redis.
This article details how to install and configure the Git tool in Windows to connect to GitHub. You can also use Git in Visual Studio.
I. Prepare tools
1. Download Git Extensions. Address http://co
own push system. Apple has a service called "feedback", and we can call this service periodically to get a list of invalid tokens. This service you can only call once to get all the invalid tokens list. So, if an app uses a lot of different companies ' push SDKs, they'll scramble for resources to poll for the invalid tokens list. The more invalid tokens, the less performance your push system will have. And APNs just shut down the connection and reconnect as soon as an error occurs. That is, "re
uses a lot of different companies ' push SDKs, they'll scramble for resources to poll for the invalid tokens list. The more invalid tokens, the less performance your push system will have. And APNs just shut down the connection and reconnect as soon as an error occurs. That is, "reboot" the socket connection.:Where did the PN2 go in the picture? It is placed in the feedback list, waiting for the next time you call the feedback service and then re-send.Why did Apple design a "restart" strategy i
designs pix to help suppliers and their distributors to exchange product data more easily.
The long-term goal is for industrial organizations-not commercenet--to use CBL as a common basis for a particular DTD. Some initial attempts to focus on industry have been announced:
Open Buying on the Internet (OBI): A standard for international commercial shopping across the Internet. OBI is based on current Internet standards, such as HTML, SSL (for Security), SET (for credit card transactions), and
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