(→Related channels: Adding more channels to the list)
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Latest revision as of 12:21, 16 June 2016
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 1046 concurrent users, making the channel consistently one of the most popular 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.
 1 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
 2 Principles
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 fact 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 questions.
- Helpful answers should be encouraged with
name++karma points, in public, as a reward for providing a good answer.
- Avoid getting frustrated by negative comments and ambiguous questions. Approach them by asking for details (i.e. Socratic questioning), rather than challenging the competence of the writer (ad hominem). As the channel grows, we see a diverse range of people with different programming backgrounds getting accustomed to Haskell. Be patient and take satisfaction from spreading knowledge.
 3 History
The #haskell channel appeared in the late 90s, and really got going in early 2001, with the help of Shae Erisson (aka shapr).
 4 Related channels
In addition to the main Haskell channel there are also:
 4.1 Language/Country specific
|#haskell-br||Brazilian Portuguese (pt_BR) speakers|
|#haskell.cz||Czech speakers (UTF-8)|
|#haskell-fr||French speakers (note the hyphen! in the channel name)|
|#haskell-id||Indonesian speakers (note the hyphen! in the channel name)|
|#haskell.ru||Russian speakers. Seems that most of them migrated to Jabber conference (email@example.com).|
|#haskell_ru||Russian speakers again, in UTF-8. For those, who prefer good ol' IRC channel with a lambdabot.|
|#haskell.tw||Chinese speakers (mainly in Taiwan)|
|#chicagohaskell||Chicago Haskell programmers group|
 4.2 Platform-specific
|#haskell-beginners||Haskell people focused on teaching and learning Haskell, not just beginners.|
|#haskell-offtopic||Haskell people talking about anything except Haskell itself (no TLS required)|
|#haskell-blah||Haskell people talking about anything except Haskell itself (TLS required)|
|#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-apple||projects that target iOS or OS X using Haskell.|
|#haskell-lisp||Haskell Lisp - projects that are creating Lisps written in Haskell, or Haskell implementations written in Lisps.|
|#haskell-llvm||For projects using Haskell and LLVM|
|#haskell-web||Friendly, practical discussion of haskell web app/framework/server development|
|#haskell-robotics||Discussion about the use of Haskell for robotics applications.|
|#arch-haskell||Arch Linux/ specific Haskell conversations|
|#fedora-haskell||Fedora Haskell SIG|
|#gentoo-haskell||Gentoo/Linux specific Haskell conversations|
 4.3 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)|
|#snowdrift||Snowdrift.coop Yesod-based web platform for funding free/libre/open works, welcomes Haskell volunteer devs including beginners|
|#snapframework||Snap web framework|
|#xmonad||Xmonad tiling window manager|
|#yesod||Yesod web framework|
 5 Logs
 6 Bots
There are various bots on the channel. Their names and usage are described here.
 6.1 lambdabot
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.
|@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|
|@tell <nick> <msg> -- same as @ask||Next time <nick> speaks in channel they will be notified they have a message pending and how to receive it.|
 6.2 preflex
is the name of a lambdabot with more commands/plugins enabled. It is run by ?? To talk to preflex, write preflex: command ARGS
|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'|
 6.3 hpaste
Not online often !?
 6.4 hackage
The hackage bot provides real-time notifications of new package uploads to Hackage.
 7 Locations
To get an overview of where everybody on the channel might be, physically, please visit Haskell user locations.