Cleaned up Day 3

day3/day3.lua

@@ -3,30 +3,25 @@ io.input(file)
 
 score = 0
 
-for line in file:lines() do
+function find_duplicates(first, second)
-    local first = string.sub(line, 1, #line/2)
-    local second = string.sub(line, #line/2 + 1, #line)
-    print(#first)
-    print(#second)
     for i = 1, #first do
         local char = string.sub(first, i, i)
 
         if string.match(second, char) then
-            print(char)
             if char == string.upper(char) then
-                --print(string.byte(char) - string.byte("A") + 27)
+                return string.byte(char) - string.byte("A") + 27
-                score = score + string.byte(char) - string.byte("A") + 27
-                goto continue
             elseif char == string.lower(char) then
-                --print(string.byte(char) - string.byte("a"))
+                return string.byte(char) - string.byte("a") + 1
-                score = score + string.byte(char) - string.byte("a") + 1
-                goto continue
             end
         end
-
     end
+end
 
-    ::continue::
+for line in file:lines() do
+    local first = string.sub(line, 1, #line/2)
+    local second = string.sub(line, #line/2 + 1, #line)
+
+    score = score + find_duplicates(first, second)
 end
 
 print(score)

day3/day3part2.lua

@@ -8,26 +8,25 @@ for line in file:lines() do
     table.insert(data, line)
 end
 
+function find_duplicates(one, two, three)
+    for i = 1, #one do
+        local char = string.sub(one, i, i)
+        if string.match(two, char) and string.match(three, char) then
+            if char == string.upper(char) then
+                return string.byte(char) - string.byte("A") + 27
+            elseif char == string.lower(char) then
+                return string.byte(char) - string.byte("a") + 1
+            end
+        end
+    end
+end
+
 for i = 1, #data/3 do
     local one = data[(i-1)*3+1]
     local two = data[(i-1)*3+2]
     local three = data[(i-1)*3+3]
 
-    for n = 1, #one do
+    score = score + find_duplicates(one, two, three)
-        local char = string.sub(one, n, n)
-        if string.match(two, char) and string.match(three, char) then
-            if char == string.upper(char) then
-                score = score + string.byte(char) - string.byte("A") + 27
-                goto continue
-            elseif char == string.lower(char) then
-                score = score + string.byte(char) - string.byte("a") + 1
-                goto continue
-            end
-        end
-
-    end
-
-    ::continue::
 end
 
 print(score)