Added lust sum function.

Type annotations not working

main.roc

@@ -2,54 +2,37 @@ app [main] { pf: platform "https://github.com/roc-lang/basic-cli/releases/downlo
 
 import pf.Stdout
 
-# listLen = \list ->
-#     List.len (list)
- 
 
-# sumList = \counter, maxLen ->
-#     if counter == maxLen then
-#         1
-#     else
-#         newCounter = counter + 1
-#         ((sumList newCounter maxLen) + 1)
-
-sumList : Num *, Num * -> Num *
-
-sumList = \counter, maxLen ->
-    if counter == maxLen then
-        1
+# Recusivly incrementing counter until it hits maxLen
+# The plus one on the recursive call would be the current element of the list
+# Counter will be the current list index
+#sum : Num a, (List (Num a)) -> Num a where a implements Bool.Eq #Type Annotations are weird :(
+sum = \counter, nums ->
+    if counter == (List.len nums) then
+        0
     else
+        currentValue = listI nums counter
+        # Try to make type annotions work
+        #newCounter: Num a where a implements Bool.Eq 
         newCounter = counter + 1
-        ((sumList newCounter maxLen) + 1)
+        ((sum newCounter nums) + currentValue)
+
+
+# Gets the value in a list at a given index
+# Returns 0 if the index is out of bounds
+listI: (List (Num a)), U64 -> Num a
+listI = \list, i ->
+    res = List.get list i
+    when res is
+        Ok value -> value
+        Err OutOfBounds -> 0
 
-plusTwo: Num a -> Num a
-plusTwo = \i ->
-    i + 2
 
 main =
-    sum = sumList 0 7
-    Stdout.line! (Num.toStr(sum))
-
-    # nums = [1, 2, 3]
-    # ind = 1
-    # res = List.get nums ind
-
-    # when res is 
-    #     Ok value -> value
-    #     Err OutOfBounds -> 0
-
-    i = plusTwo 4
-    Stdout.line! (Num.toStr(i))
-
-
-
-    
-    # sum = sumList(0, 4)
-    # #Stdout.line! (Num.toStr(sumList 2, 3))
-    # Stdout.line! (sum)
-    # gomus = [1, 2, 3]
-    # gomusLen = List.len( gomus )
-    # Stdout.line! (Num.toStr(gomusLen))
-
-    
+    nums = [1, 20, 3, 1, 1]
+    #firstHun = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100]
+    # Correct value for the first hundred list sum is 5050
+    sumValue = sum 0 nums
+    dbg sumValue
 
+    Stdout.line! ("Finished!")