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”)
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
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