erlang model

provides tools to help you combine multiple modules into one7.parsetoolapplication, contains the LALR-1 generation parser YECC (similar to YACC), lexical analysis generator Leex8.reltool Release Management tool that provides graphical front end and back end hooks that can be used to build common systems9.runtime_toolsapplication, offers some very useful tools, dyntrace (Dynamic Trace), System_information (System probe), DBG ( Text-based trace, which contains the user-friendly trace bifs), etc.

Erlang has three ways to produce a random numberRandom:uniform ().This function is provided by the Erlang Library random module. This is generally used.1> Random:uniform (). 0.4435846174457203Erlang:now ().Use the current time as a random believe a lot of people have done it. So if you don't have a lot of demands, you can do the same.1> Erlang:now (). { 1419,831449,715000}Crypto:strong_rand_bytes (N).The cr

Someone in the group asked me that the long data in shell was omitted as [...] |...], how to view the omitted part is the problem encountered when calling OS: getenv (). We have encountered similar problems before, such as string: tokens (binary_to_list (Erlang: system_info (Info), "\ n "). Eshell V5.9 (abort with ^G)1> string:tokens( binary_to_list(erlang:system_info(info)),"\n").["=memory","total: 4331920","processes: 438877","processes_used: 4388

1.application definition . Illustration: Mnesia, cowboy, Mochiweb ... is a application. does not affect each other in Erlang, which causes a process to crash and B processes that do not rely on the a process to function properly. And since Erlang's mechanism causes it to know the a process crashes, then if you can restart the A-process, then this system: I tell you, it's a perpetual system, "Who's so wasted that they don't have electricity at night"

Baidu Cloud Push official address Http://developer.baidu.com/wiki/index.php?title=docs/cplat/pushSimple introduction to the following principle:Baidu Cloud push support for iOS and Android cloud push. Android support is good, but iOS is generally hard to get through. Baidu Cloud for iOS push, he just did an intermediary agent, to provide users with interface, the advantage is the use of Baidu Cloud push, Android and iOS can be unified management; The disadvantage is: it is not easy to pass, the

) Throw New Argumentnullexception ( " Dict " ); VaR NL = encoding. utf8.getbytes ( " \ R \ n " ); VaR MS = New Memorystream (); Foreach ( VaR Key In Dict. Keys){ VaR Val = dict [Key]; VaR Klength = encoding. utf8.getbytes ( " $ " + Key. Length + " \ R \ n " ); VaR K = encoding. utf8.getbytes (Key + " \ R \ n " ); VaR Vlength = encoding. utf8.getbytes ( " $ " + Val. Length + " \ R \ n " );Ms. Write (klength, 0 , Klength. Length );Ms. Write (K, 0 , K. Length );Ms. Write (vlength,

Erlang has provided a series of tools to view the running status. Is there any Web monitoring tool available? The following describes a great tool: BigwigIt provides SASL log view, OTP process tree topology, process view (sorted by metric), Application Management, node performance sampling, process control, and other functions; this project is built on a successful open-source project: Web framework usage Cowboy, JSON Parsing Jsx; Use. /Rebar get-deps

],[1,2,3,4,5,6,7,8,9,10],[1,2,3,4,5,6,7,8,9,10],[1,2,3,4,5,6,7,8,9,10],[1,2,3,4,5,6,7,8,9,10]]ok6> erts_debug:size(L2).327> erts_debug:flat_size(L2).132 　　 When starting shell, the shell PID is Eshell V6.0 (abort with ^G)1> self(). 　　 Why does it trigger data expansion (expand, flattening? See the following code. When the shell is started, the variable that has been bound previously will be used as the spawn_link parameter to start the new shell. erl6.2\lib\stdlib-2.2\srcstart_eval(Bs, RT

Seven weeks and seven languages -- Erlang's second day and seven weeks of erlang's self-studyKey-value pairs Question: consider a list of key-value tuples, such as [{erlang, "a functinal language"}, {ruby, "an OO language"}]. Write a function that accepts the list and key as parameters and returns the value corresponding to the key. Get_value (Map, Key)-> element (2, hd (lists: dropwhile (fun ({K, _})-> Key/= K end, Map) ++ [{[], []}]). % ++ Concaten

request is loaded in a message and sent to the cast of gen_server. This calls free and returns OK. When gen_server receives the request, it calls handle_cast (request, stats) and returns a tuple {noreply, state1 }. State1 is a new value of gen_server status. handle_info(_Info, State) -> {noreply, State}. Used to process information other than the request. terminate(_Reason, _State) -> ok. Terminate a function to terminate a running process. If gen_server is part of a supervision

As projects become increasingly reliant on Erlang, the problems that come up with it increase. The previous time line system encounters the memory high consumption problem, records the troubleshooting analysis process. The online system uses the Erlang R16B02 version. Problem description There are several online systems that run for some time and memory soars. The system

In. net, we can use Attribute and reflection to parse Assembly metadata at runtime. Below is a simple example written by C: Worker1 worker1 = new Worker1 (); var attribute = worker1.GetType().GetCustomAttribute(typeof( ProcessOrderAttribute)) as ProcessOrderAttribute ; Console.WriteLine("Description {0} Order {1}" , attribute.Descrption, attribute.Order); Console.ReadLine();[ProcessOrder( " first step", 1)] public class Worker1 { }class ProcessOrderAttribute : Attribute { public st

Erlang entry: service process instance operations and exercises 3. erlang instance Example of banking services:Create user: bank_server: create_account (myname, 100 ).User saves money: myname! {Deposit, 10 }.User withdrawal: myname! {Cash1, 20 }.Myname! {Cash2, 30 }.Query balance: myname! Check.====================================== Example of game role usage:Create role: {OK, Pid} = game_server: create_p

This is a creation in Article, where the information may have evolved or changed. original articles, reproduced please specify the Source: Server non-amateur research http://blog.csdn.net/erlib author Sunface Why do I have to choose Erlang? First, Erlang is particularly suitable for Small and medium-sized team entrepreneurship: Erlang has an exceptionally matu