Difference between revisions of "IRC channel"

From HaskellWiki
Jump to navigation Jump to search
(Added #haskell-br)
Line 3: Line 3:
The Freenode IRC network hosts the very large #haskell channel, and we've had
The Freenode IRC network hosts the very large #haskell channel, and we've had
up to
up to 884
concurrent users
concurrent users
(average is 714
(average is 787
), making the channel
), making the channel consistently
[http://searchirc.com/search.php?SCHANS=1&SSORT=SIZE&N=freenode one of the 10 largest]
[http://searchirc.com/search.php?SCHANS=1&SSORT=SIZE&N=freenode one of the largest]
of the 12,000+ channels on freenode and the second largest programming language channel after Python. One famous
of the thousands of channels on freenode. One famous
resident is [[Lambdabot]], another is [http://hpaste.org hpaste] (see
resident is [[Lambdabot]], another is [http://hpaste.org hpaste] (see
the [[#Bots|Bots]] section below).
the [[#Bots|Bots]] section below).

Revision as of 21:44, 17 December 2011

Internet Relay Chat is a worldwide text chat service with many thousands of users among various irc networks.

The Freenode IRC network hosts the very large #haskell channel, and we've had up to 884 concurrent users (average is 787 ), making the channel consistently one of the largest of the thousands of channels on freenode. One famous resident is Lambdabot, another is hpaste (see the Bots section below).

The IRC channel can be an excellent place to learn more about Haskell, and to just keep in the loop on new things in the Haskell world. Many new developments in the Haskell world first appear on the irc channel.

Since 2009, the Haskell channel has grown large enough that we've split it in two parts:

  • #haskell, for all the usual things
  • #haskell-in-depth , for those seeking in depth, or more theoretical discussion

As always, #haskell remains the primary place for new user questions.

The #haskell social graph, Jan 2008
Daily traffic in #haskell since 2004
Growth of #haskell
Haskell noun map

Getting there

If you point your irc client to chat.freenode.net and then join the #haskell channel, you'll be there. Alternately, you can try http://java.freenode.net/ or http://webchat.freenode.net/ which connects inside the browser.

Example, using irssi:

   $ irssi -c chat.freenode.net -n myname -w mypassword
   /join #haskell

Tip, if you're using Emacs to edit your Haskell sources then why not use it to chat about Haskell? Check out ERC, The Emacs IRC client. Invoke it like this and follow the commands:

   M-x erc-select
   /join #haskell
A screenshot of an irssi session in #haskell


The #haskell channel is a very friendly, welcoming place to hang out, teach and learn. The goal of #haskell is to encourage learning and discussion of Haskell, functional programming, and programming in general. As part of this we welcome newbies, and encourage teaching of the language.

Part of the #haskell success comes from the approach that the community is quite tight knit -- we know each other -- it's not just a homework channel. As a result, many collaborative projects have arisen between Haskell irc channel citizens.

To maintain the friendly, open culture, the following is required:

  • Low to zero tolerance for ridiculing questions. Insulting new users is unacceptable.

New Haskell users should feel entirely comfortable asking new questions. Helpful answers should be encouraged with name++ karma points, in public, as a reward for providing a good answer.

As the channel grows, we see a diverse range of people, with different programming backgrounds, trying to make their way with Haskell. A good rule of thumb, to avoid frustration is:

  • approach negative comments by asking for details (kind of like Socratic questioning), rather than challenging the competence of the writer (ad hominem).


The #haskell channel appeared in the late 90s, and really got going in early 2001, with the help of Shae Erisson (aka shapr).

A fairly extensive analysis of the traffic on #haskell over the years is kept here

Related channels

In addition to the main Haskell channel there are also:

Channel Purpose
#haskell-br Brazilian Portuguese (pt_BR) speakers
#haskell.cz Czech speakers (UTF-8)
#haskell.de German speakers
#haskell.dut Dutch speakers
#haskell.es Spanish speakers
#haskell.fi Finnish speakers
#haskell-fr (note the hyphen!) French speakers
#haskell.hr Croatian speakers
#haskell.it Italian speakers
#haskell.jp Japanese speakers
#haskell.no Norwegian speakers
#haskell.pt Portuguese speakers
#haskell.ru Russian speakers. Seems that most of them migrated to Jabber conference (haskell@conference.jabber.ru).
#haskell_ru Russian speakers again, in UTF-8. For those, who prefer good ol' IRC channel with a lambdabot.
#haskell.se Swedish speakers
#haskell-blah Haskell people talking about anything except Haskell itself
#haskell-books Authors organizing the collaborative writing of the Haskell wikibook and other books or tutorials.
#haskell-game The hub for Haskell-based game development
#haskell-in-depth slower paced discussion of use, theory, implementation etc with no monad tutorials!
#haskell-iphone Haskell-based iPhone development
#haskell-overflow Overflow conversations
#haskell-web Friendly, practical discussion of haskell web app/framework/server development
#arch-haskell Arch Linux/ specific Haskell conversations
#gentoo-haskell Gentoo/Linux specific Haskell conversations
Projects using haskell:
#darcs Darcs revision control system
#hackage Haskell's software distribution infrastructure
#happs Happstack web framework
#hledger hledger accounting tools and library
#leksah Leksah IDE for Haskell development
#perl6 Perl 6 development (plenty of Haskell chat there too)
#snapframework Snap web framework
#xmonad Xmonad tiling window manager


Logs are kept at http://tunes.org/~nef/logs/haskell/


There are various bots on the channel. Their names and usage are described here.


Lambdabot is both the name of a software package and a bot on the channel. It provides many useful services for visitors to the IRC channel. It is available as a haskell package and can be integrated into ghci. Details on the software are found on a separate wiki page.

Here is its interface for the IRC user:

lambdabot's commands are prepended by a '@' sign.

Command Usage
@help display help to other commands, but help text is not available for all commands.
@type EXPR or ':t' EXPR shows the type of an expression
@kind TYPECONSTRUCTOR shows the kind of a type constructor
@run EXPR or '>' EXPR evaluates EXPR
@pl FUNCTION shows a pointfree version of FUNCTION
@pointful FUNCTION or '@unpl' FUNCTION shows a 'pointful' version of FUNCTION


is the name of a lambdabot with more commands/plugins enabled. It is run by ?? To talk to preflex, write preflex: command ARGS

Command Usage
help COMMAND displays help to other commands.
list lists all plugins with their commands
NICK++ / NICK-- in/decrements the karma of NICK.
karma NICK shows the karma of NICK
seen NICK shows information about the last message of a user
tell / ask sends NICK MSG a message when she becomes active.
xseen see 'seen' ?? any difference ?
quote NICK prints a random quote of NICK
remember NAME QUOTE associates NAME with quote. can be accessed by 'quote'
... ...


The hpaste bot provides a notification interface to the hpaste pastebin. Emacs integration is available.


Not online often !?


The hackage bot provides real-time notifications of new package uploads to Hackage.


To get an overview of where everybody on the channel might be, physically, please visit Haskell user locations.