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Today's Topics:
1. curious behavior of Haskell wiki (Doug McIlroy)
2. Different versions of ghci REPL in Emacs? (Lawrence Bottorff)
----------------------------------------------------------------------
Message: 1
Date: Sat, 21 Mar 2020 10:18:07 -0400
From: Doug McIlroy <d...@cs.dartmouth.edu>
To: beginners@haskell.org
Subject: [Haskell-beginners] curious behavior of Haskell wiki
Message-ID: <202003211418.02lei70x108...@tahoe.cs.dartmouth.edu>
Content-Type: text/plain; charset=us-ascii
Why does a search for "bitwise" in the Haskell wiki find
an instance of "bitwise AND", whereas a search for
"bitwise AND" or "bitwise and" (in quotes) finds nothing?
Is this a bug or a (mis)feature?
Doug McIlroy
------------------------------
Message: 2
Date: Sat, 21 Mar 2020 23:42:53 -0500
From: Lawrence Bottorff <borg...@gmail.com>
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <beginners@haskell.org>
Subject: [Haskell-beginners] Different versions of ghci REPL in Emacs?
Message-ID:
<CAFAhFSU5dURzp-CBreOK_xE8DBd0virUGFfBR=jm9062mdt...@mail.gmail.com>
Content-Type: text/plain; charset="utf-8"
I'm using Emacs (26.3) and org-mode (9.3.6) and I seem to have two
different versions of ghci going, depending on whether I'm using
haskell-mode alone with a *.hs file, or whether I am evaluating an org-mode
babel code block.
If I open, say, test.hs in Emacs, haskell-mode starts up. And if I choose
<Start interpreter> from the menu, I get this "lambda prompt" REPL
The next big Haskell project is about to start!
If I break, you can:
1. Restart: M-x haskell-process-restart
2. Configure logging: C-h v haskell-process-log (useful for debugging)
3. General config: M-x customize-mode
4. Hide these tips: C-h v haskell-process-show-debug-tips
λ>
But if I call M-run-haskell, I get this "Prelude prompt" REPL
Configuring GHCi with the following packages:
GHCi, version 8.6.5: http://www.haskell.org/ghc/ :? for help
Loaded GHCi configuration from /home/lawrence/.ghc/ghci.conf
Prelude> Prelude>
and this babel bit knows and interacts with it
#+BEGIN_SRC haskell :results output
:set +m
doubleMe x = x + x
doubleUs x y = doubleMe x + doubleMe y
#+END_SRC
but then trying to run this code block with lambda prompt REPL, I get the
error
executing Haskell code block...
org-babel-execute:haskell: Buffer *haskell* does not exist or has no process
even though the lambda REPL is called *haskell*. Why am I getting two
separate REPLs?
BTW, which IDE do Haskell big boys and girls use?
LB
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