Erlang Central

Difference between revisions of "Main Page"

From ErlangCentral Wiki

Line 13:Line 13:
  
 
====Here is an example of Erlang code:====
 
====Here is an example of Erlang code:====
<pre>
+
 
 +
<pre style="margin-top: 20px">
 
-module(beersong).
 
-module(beersong).
 
-export([sing/0]).
 
-export([sing/0]).
Line 68:Line 69:
 
[[:Category:Articles|Erlang Articles]] - Articles of interest to Erlang developers and testers<br/>
 
[[:Category:Articles|Erlang Articles]] - Articles of interest to Erlang developers and testers<br/>
 
[[ErlangJobs]] - Erlang and Erlang related Jobs<br/>
 
[[ErlangJobs]] - Erlang and Erlang related Jobs<br/>
 
+
[[:Category:Links|Links]] to Erlang related sites outside Trapexit<br>
==Links==
+
[http://planet.trapexit.org RSS Feeds] related to Erlang, including blogs and software development
*[[:Category:Links|Links]]
+
*[http://www.trapexit.org/planet/ Check out our RSS Feeds]
+
  
 
</td>
 
</td>
Line 92:Line 91:
 
{| style="margin-top:1em; width: 200px; background:#fcfcfc; border:1px solid #860404; cell-padding:0 white-space:nowrap; overflow: hidden"
 
{| style="margin-top:1em; width: 200px; background:#fcfcfc; border:1px solid #860404; cell-padding:0 white-space:nowrap; overflow: hidden"
 
|style="color:#000; font-size:85%; margin-top:0; "|
 
|style="color:#000; font-size:85%; margin-top:0; "|
<h2 class="#bodyContent">Latest Mailing Lists Posts</h2>
+
<h2 class="#bodyContent">Mailing Lists Posts</h2>
 
<irss max=3>http://www.trapexit.org/forum/rss_mod.php?f=2</irss>
 
<irss max=3>http://www.trapexit.org/forum/rss_mod.php?f=2</irss>
 
<br/><irss max=1>http://www.trapexit.org/forum/rss_mod.php?f=11</irss>
 
<br/><irss max=1>http://www.trapexit.org/forum/rss_mod.php?f=11</irss>
Line 98:Line 97:
 
|}
 
|}
 
   
 
   
<!-- BEGIN UPDATE NOTICE.
+
 
{| style="width:100%; background:#fcfcfc; margin-top:+.9em; border:1px solid #860404;"
+
|style="color:#000"|
+
{| style="border:solid 0px; width:100%; background:none;"
+
|style="text-align:center;white-space:nowrap; color:#000;"|
+
<div style="font-size:162%; border:none; margin:0; padding:.1em; color:#860404;">Update Notice</div>
+
<div style="top:+0.2em; font-size:100%;"><br/>trapexit.org is currently being updated, and might have occasional downtime.</div>
+
<div>Login for the wiki and the forum has been merged, <b>use the name from the forum to login.</b><br>Your wiki login is no longer valid. If you were automatically logged on from previous sessions<br> prior to the update,<b> clear your cache and cookies</b> in order to log off.</div>
+
|}
+
|}
+
<!-- END UPDATE NOTICE -->
+
 
</td></tr></table>
 
</td></tr></table>

Revision as of 19:34, 2 July 2007

Your Erlang Community Site

Welcome to trapexit.org, the Erlang community site where you can read news and weblogs related to Erlang/OTP, discuss projects, issues and ideas with other Erlang developers, and read and publish articles and HowTos related to Erlang/OTP.

What is Erlang and OTP?

Erlang is a programming language and a runtime system with strong built-in support for concurrency, distribution and fault tolerance. Originally developed at Ericson, Erlang was released as open source in 1998.

The Open Transaction Platform (OTP) is set of Erlang libraries and design principles providing middle-ware to develop distributed, fault tolerant, massively concurrent soft real-time systems.

Here is an example of Erlang code:

-module(beersong).
-export([sing/0]).
-define(TEMPLATE_0, "~s of beer on the wall, ~s of beer.~n"
                    "Go to the store and buy some more," 
                    "99 bottles of beer on the wall.~n").
-define(TEMPLATE_N, "~s of beer on the wall, ~s of beer.~n"
                    "Take one down and pass it around, ~s"
                    " of beer on the wall.~n~n").

create_verse(0)      -> 
    {0, io_lib:format(?TEMPLATE_0, phrase(0))};
create_verse(Bottle) -> 
    {Bottle, io_lib:format(?TEMPLATE_N, phrase(Bottle))}.

phrase(0)      -> ["No more bottles", "no more bottles"];
phrase(1)      -> ["1 bottle", "1 bottle", "no more bottles"];
phrase(2)      -> ["2 bottles", "2 bottles", "1 bottle"];
phrase(Bottle) -> 
     lists:duplicate(2,integer_to_list(Bottle) ++ " bottles") ++ 
                     [integer_to_list(Bottle-1) ++ " bottles"].
bottles() -> lists:reverse(lists:seq(0,99)).
sing() ->
    lists:foreach(fun spawn_singer/1, bottles()),
    sing_verse(99).
spawn_singer(Bottle) ->
    Pid = self(), 
    spawn(fun() -> Pid ! create_verse(Bottle) end).
sing_verse(Bottle) ->
    receive
	{_, Verse} when Bottle == 0 ->
	    io:format(Verse);
	{N, Verse} when Bottle == N ->
	    io:format(Verse),
	    sing_verse(Bottle-1)
    after 
	3000 ->
	    io:format("Verse not received after 3 seconds"
                      " - re-starting singer~n"),
	    spawn_singer(Bottle),
	    sing_verse(Bottle)
    end.


Starter

Good places to start on trapexit.org

HowTo documents - Tutorials and Guides for Erlang developers
Erlang Cookbook - A collection of Erlang solutions to specific problems
Erlang Concepts - Articles dealing with specific Erlang aspects
Erlang Best Practices - Articles dealing with best practices in Erlang
Erlang Articles - Articles of interest to Erlang developers and testers
ErlangJobs - Erlang and Erlang related Jobs
Links to Erlang related sites outside Trapexit
RSS Feeds related to Erlang, including blogs and software development

Trapexit News

<irss max=1 news=true>http://www.trapexit.org/forum/rss_mod.php?f=19</irss>

Latest Forum Posts

<irss max=3>http://www.trapexit.org/forum/rss_mod.php?f=23</irss>
<irss max=3>http://www.trapexit.org/forum/rss_mod.php?f=7</irss>
<irss max=3>http://www.trapexit.org/forum/rss_mod.php?f=14</irss>

Mailing Lists Posts

<irss max=3>http://www.trapexit.org/forum/rss_mod.php?f=2</irss>
<irss max=1>http://www.trapexit.org/forum/rss_mod.php?f=11</irss>
<irss max=1>http://www.trapexit.org/forum/rss_mod.php?f=12</irss>