erlang model

[Erlang 0006] record and macro in Erlang we mentioned that record is a compilation function and there is no special data type in Erlang VM. if you want to solve the problem online and sometimes use record in shell, you have two options: 1. construct a record definition in shell. If a record can be constructed, it is much easier to compile the ETS: Match matching

OutlineNotes SeriesErlang Environment and sequential programmingErlang Concurrent ProgrammingErlang Distributed programmingYawsErlang/otpDate Change Description2014-11-23 A OutlineA 1.1-1.22014-12-08 A 1.3Agenda0 RangeNodes and CommunicationsBasic Distributed Programming ModuleEMPD processSocket programming1 Erlang nodes and communication 1.1 nodesAn Erlang node is a named (named) running

As the future of the code says, in order to make full use of multi-core, concurrency will become the future trend of development, for concurrent programming support, Erlang is indeed the choice, Erlang is still relatively small in China, the classic books are relatively few, and finally chose the Erlang programming 2nd edition As my first

some work asynchronously are not something your have to sit down And I'm about. Typical Erlang systems have thousands or tens of thousands of threads. There is no futzing with threadpools and executors like we does in Java. From what little I have dabbled with it, I found Erlang to is a pleasant compromise between a functional language, and a Language that allows you to write Real-world applications. (I

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: Referent

Erlang methods include M: F (a), M: F (a), fun, F (), and apply/. How is the call efficiency? Here is a summary of Erlang/OTP in action:That is, the call speed of methods between modules and modules is not much different. Pay attention to the slow call speed of the metadatable method (apply call, in addition, unless it is in scenarios with high performance requirements, you do not have to worry too much abo

[1] The goal of Erlang is concurrency. The core mechanism supporting concurrency is the process "Making reliable distributed systems in the presence of sodware errors" [PDF] [2] concurrency is a kind of ability to execute in non-sequential order. parallelism is a kind of "can be done at the same time" from the perspective of processing execution. There is also a kind of angle: concurrency occurs logically at the same time (simultaneous), while parall

Tags: des style blog HTTP Io OS AR for strong Previously, the following paper was mentioned in the Erlang paper we have read in [Erlang 0126:On preserving term sharing in the Erlang Virtual MachineAddress: http://user.it.uu.se /~ Kostis/papers/erlang12_sharing.pdfAbstract: In this paper we describe our experiences and argue through examples why? Attening terms du

[Erlang 0012] Erlang process input queue we mentioned the use of Erlang: process_info/1 to capture the status information of processes at runtime. Sometimes we need to capture the information of all processes in the node, it is easy to analyze the running status of processes in the entire node, especially picking out some abnormal processes. For example, if the o

[Erlang] What are the pitfalls for future generations? (3) erlang Mining 21.The following code is used to generate a random number: random:seed(erlang:now()). Erlang: now () is a continuously increasing number that never repeats, but is not suitable for Random Algorithms. It is best to use the following: -spec get_random_num(integer()) -> integer().get_random_num

Since the final deployment of the production environment is centos, I need to install Erlang b13r04 in centos. The first time I did this, I had to take a long time off, but I was not familiar with the libraries that Erlang relied on; here we will sort out the installation details: Which libraries does Erlang depend on? A fully workingGccCompiler environment Nc

Analyze the implementation of erlang process monitoring and erlang Process MonitoringErlang supports two monitoring methods: Monitor and Link, so that all processes can be integrated. When a process exits due to an error, the monitoring process receives a message indicating that the process exits. With these features, using Erlang to build a simple and robust sys

Original address: http://www.cnblogs.com/me-sa/archive/2011/07/09/erlang0004.htmlSince the final deployment of the production environment is CentOS, I need to install Erlang b13r04 in CentOS, the first time to do this is a lot of trouble, mainly on the Erlang relies on the library is not familiar with, always compile but; here's a look at the details of the installation process:which libraries does

Symptom: in ErlangProgramAfter the startup, as long as an external Erlang program is accepted through gen_server: Call or other accesses, many unknown Erlang processes will appear. Analysis: At the beginning, I thought something went wrong. During the local test, there was no such phenomenon. Check these unknown Erlang processes and find that each of them has a

(2) small project ---- create an erlang server and an erlang Server Originally intended to embed protobuf in quick in window, many errors were found. I did not do a good job of research for a day. You can only take a rest to get down to the erlang server. First, do a good job on the server and then embed protobuf into quick. Rebar cannot be used in a window and c

The settings are common to multiple projects, but there are other fine notes depending on the scenario, which is not in the one by one description. -SunfaceFirst, the Erl startup parameters:+k trueOpen Epoll Scheduling, open Epoll in Linux, will greatly increase the efficiency of scheduling+a 100Asynchronous thread pool, invoking services for some ports+p 1024000Maximum number of processes+q 65535Maximum number of ports+SBT DBThe bound scheduler, after which the scheduler's task queue does not j

In windows, the erlang package starts and the erlang package starts. In a linux environment, erlang generates an image package by running the systools: make_script ("", []) and systools: make_tar () commands, first installs the image package, and then installs the image package, replace erl. in src, and then output to erl again, and then use erl-sname cache-boot

= fun (_, S) -> Pid = mochiweb_acceptor:start_link(self(), Listen, Loop), sets:add_element(Pid, S) end, Pool1 = lists:foldl(F, Pool, lists:seq(1, Size)), State#mochiweb_socket_server{acceptor_pool=Pool1}. This function first defines the anonymous function F, which accepts two parameters. The first parameter is discarded, and the other parameter is S. Then let's look at the first line and callMochiweb_acceptor: start_link/3Function, return the process i

The first pain in learning Erlang is ide support, and the second pain point is that there are too few Chinese materials. For Beginners, Erlang benefited from the Chinese materials contributed by Yu Feng, Li Tao, and others, returning Erlang Chinese.CommunityHere is the Chinese version of Erlang stdlib; What is a C

Different encodings (I ' ve seen it happen!). ./module.erl:5: Syntax error before:this message was certainly not as descriptive as the previous one. It usually comes the up/your line termination be not correct. This is a specific case of the previous error, so just keep a eye out. ./module.erl:5: Warning:this expression'll fail with a ' badarith ' exception Erlang are all about dynamic typing, but REM Ember that the types are strong. In this case, th