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Today's Topics:
1. Re: Noob List Woes (Bob Ippolito)
2. Re: Noob List Woes (Duke Normandin)
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Message: 1
Date: Wed, 17 Dec 2025 23:13:39 -0800
From: Bob Ippolito <[email protected]>
Subject: [Haskell-beginners]Re: Noob List Woes
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
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It looks like the problem is the indentation, I would expect the let and
the print statements to have the same level of indentation (since there’s
no “in” with the “let”)
On Wed, Dec 17, 2025 at 20:44 Duke Normandin <[email protected]>
wrote:
> Just started learning Haskell!
> Currently watching this particular video:
> https://youtu.be/vhsONvQc-Dc?list=PLmTgnNwroyn8TnF26YRvW-hvQF1ypztzg
>
> in the seies. I copied his code verbatim, but keep getting errors
> running the code on my antiX-23.2 Linux box using a fresh Haskell
> install.
>
> [quote]
> main = do
> let testScores = [79,85,92,56]
> print (testScores !! 0) -- !! means index-of
> print (testScores !! 3) -- last item
> print (head testScores) -- returns first item in a list
> [/quote]
>
> [quote]
> runghc "hello.hs" (in
> directory: /home/dnormandin/Programming/haskell/code) hello.hs:1:8:
> error: [GHC-52095] Unexpected do block in function application:
> do let testScores = ...
> Suggested fixes:
> • Use parentheses.
> • Perhaps you intended to use BlockArguments
> You may enable this language extension in GHCi with:
> :set -XBlockArguments
> |
> 1 | main = do
> | ^^...
> Compilation failed.
> [/quote]
>
> I can't figure out what's wrong with the code. I _think_ that the
> indenting is ok - which BTW is a bloody PITA!!
> I have some cl/scheme experience, but mostly with procedural langs.
> Maybe the tutorial is too dated to be useful? If it is, is there a
> similar video tutorial for beginners? TIA ...
> --
> Duke
> _______________________________________________
> Beginners mailing list -- [email protected]
> To unsubscribe send an email to [email protected]
>
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Message: 2
Date: Thu, 18 Dec 2025 00:41:48 -0700
From: Duke Normandin <[email protected]>
Subject: [Haskell-beginners]Re: Noob List Woes
To: The Haskell-Beginners Mailing List - Discussion of primarily
beginner-level topics related to Haskell <[email protected]>
Message-ID: <[email protected]>
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Thx! I believe that indenting bs just killed my exploration of haskell. Much
obliged….
—
Duke
Sent from my iPhone
> On Dec 18, 2025, at 12:14 AM, Bob Ippolito <[email protected]> wrote:
>
>
> It looks like the problem is the indentation, I would expect the let and the
> print statements to have the same level of indentation (since there’s no “in”
> with the “let”)
>
>> On Wed, Dec 17, 2025 at 20:44 Duke Normandin <[email protected]>
>> wrote:
>> Just started learning Haskell!
>> Currently watching this particular video:
>> https://youtu.be/vhsONvQc-Dc?list=PLmTgnNwroyn8TnF26YRvW-hvQF1ypztzg
>>
>> in the seies. I copied his code verbatim, but keep getting errors
>> running the code on my antiX-23.2 Linux box using a fresh Haskell
>> install.
>>
>> [quote]
>> main = do
>> let testScores = [79,85,92,56]
>> print (testScores !! 0) -- !! means index-of
>> print (testScores !! 3) -- last item
>> print (head testScores) -- returns first item in a list
>> [/quote]
>>
>> [quote]
>> runghc "hello.hs" (in
>> directory: /home/dnormandin/Programming/haskell/code) hello.hs:1:8:
>> error: [GHC-52095] Unexpected do block in function application:
>> do let testScores = ...
>> Suggested fixes:
>> • Use parentheses.
>> • Perhaps you intended to use BlockArguments
>> You may enable this language extension in GHCi with:
>> :set -XBlockArguments
>> |
>> 1 | main = do
>> | ^^...
>> Compilation failed.
>> [/quote]
>>
>> I can't figure out what's wrong with the code. I _think_ that the
>> indenting is ok - which BTW is a bloody PITA!!
>> I have some cl/scheme experience, but mostly with procedural langs.
>> Maybe the tutorial is too dated to be useful? If it is, is there a
>> similar video tutorial for beginners? TIA ...
>> --
>> Duke
>> _______________________________________________
>> Beginners mailing list -- [email protected]
>> To unsubscribe send an email to [email protected]
> _______________________________________________
> Beginners mailing list -- [email protected]
> To unsubscribe send an email to [email protected]
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