vault backup: 2025-02-19 11:50:56

3-99 Research/Haskell/Chapter 1 - Introduction.md

@@ -20,5 +20,7 @@ A Haskell compiler! The recommended one is GHC.
 
 GHC can compile code but it can also run from the prompt interactively, by running 'ghci'. You can list functions from the current folder using ':l filename'. The file can be reloaded using ':r'
 
+I got Haskell installed and set up the Haskell Language Server for Neovim. That took a little bit more effort than anticipated but eventually I got it to work. My Lua files are so fucked. ChatGPT helped a lot though.
+
 [^1]: not really Rust, because I believe Rust has functional programming support.
 

3-99 Research/Haskell/main.hs

@@ -0,0 +1,12 @@
+module Main where
+
+-- A simple function that calculates the sum of a list of numbers.
+sumList :: [Int] -> Int
+sumList xs = foldl (+) 0 xs
+
+main :: IO ()
+main = do
+    let numbers = [1, 2, 3, 4, 5]
+    -- Intentional error: 'numers' is misspelled to test error detection.
+    print (sumList numbers)
+