Day 5 cleanup

day05/src/day05.jl

@@ -1,24 +1,32 @@
-function task0(file)
-    lines =
+function parseinput(file)
     eachline(file) .|>
     (x -> match(r"(?<x1>\d+),(?<y1>\d+) -> (?<x2>\d+),(?<y2>\d+)", x)) .|>
     (p -> (x1 = parse(Int, getindex(p, "x1")) + 1,
         y1 = parse(Int, getindex(p, "y1")) + 1,
         x2 = parse(Int, getindex(p, "x2")) + 1,
-            y2 = parse(Int, getindex(p, "y2")) + 1)) |>
-        x -> filter(l -> l.x1 == l.x2 || l.y1 == l.y2, x)
+        y2 = parse(Int, getindex(p, "y2")) + 1)) .|>
+    (l -> (
+        x1 = l.y2 < l.y1 ? l.x2 : (l.y2 > l.y1 ? l.x1 : min(l.x1, l.x2)),
+        y1 = min(l.y1, l.y2),
+        x2 = l.y2 > l.y1 ? l.x2 : (l.y2 < l.y1 ? l.x1 : max(l.x1, l.x2)),
+        y2 = max(l.y1, l.y2)))
 
-    xmax = map(l -> max(l.x1, l.x2), lines) |> maximum
+end
 
-    ymax = map(l -> max(l.y1, l.y2), lines) |> maximum
+##
 
-    mappe = zeros(Int, (xmax, ymax))
+function task0(file)
+    lines = parseinput(file) |> x -> filter(l -> l.x1 == l.x2 || l.y1 == l.y2, x)
 
-    for line in lines
+    xmax = map(l -> l.x2, lines) |> maximum
+    ymax = map(l -> l.y2, lines) |> maximum
 
-        mappe[min(line.y1, line.y2):max(line.y1, line.y2),
-            min(line.x1, line.x2):max(line.x1, line.x2)] .+= 1
+    mappe = zeros(Int, (xmax, ymax))
 
+    for line in lines
+        let (x1, y1, x2, y2) = values(line)
+            mappe[y1:y2, x1:x2] .+= 1
+        end
     end
 
     sum(mappe .>= 2)
@@ -28,42 +36,35 @@ end
 
 println("Day 05 – Task 1 – Case 0")
 open(task0, "day05\\data\\case00.txt") |> display
+@assert open(task0, "day05\\data\\case00.txt") == 5
 
 println("Day 05 – Task 1 – Case 1")
 open(task0, "day05\\data\\case01.txt") |> println
+@assert open(task0, "day05\\data\\case01.txt") == 5690
 
 ##
 
 using LinearAlgebra
 
 function task1(file)
-    lines =
-        eachline(file) .|>
-        (x -> match(r"(?<x1>\d+),(?<y1>\d+) -> (?<x2>\d+),(?<y2>\d+)", x)) .|>
-        (p -> (x1 = parse(Int, getindex(p, "x1")) + 1,
-            y1 = parse(Int, getindex(p, "y1")) + 1,
-            x2 = parse(Int, getindex(p, "x2")) + 1,
-            y2 = parse(Int, getindex(p, "y2")) + 1))
+    lines = parseinput(file)
 
     xmax = map(l -> max(l.x1, l.x2), lines) |> maximum
-
-    ymax = map(l -> max(l.y1, l.y2), lines) |> maximum
+    ymax = map(l -> l.y2, lines) |> maximum
 
     mappe = zeros(Int, (xmax, ymax))
 
     for line in lines
-        
-        if line.x1 == line.x2 || line.y1 == line.y2
-            mappe[min(line.y1, line.y2):max(line.y1, line.y2),
-                min(line.x1, line.x2):max(line.x1, line.x2)] .+= 1
+        let (x1, y1, x2, y2) = values(line)
+            if x1 == x2 || y1 == y2
+                mappe[y1:y2, x1:x2] .+= 1
 
             else
-            mappe[min(line.y1, line.y2):max(line.y1, line.y2),
-                min(line.x1, line.x2):max(line.x1, line.x2)] +=
+                mappe[y1:y2, min(line.x1, line.x2):max(line.x1, line.x2)] +=
                     Matrix{Int}(I, abs(line.x1 - line.x2) + 1, abs(line.y1 - line.y2) + 1) |>
                     ((line.x2 - line.x1) / (line.y2 - line.y1) > 0 ? identity : rotl90)
             end
-        
+        end
     end
 
     sum(mappe .>= 2)
@@ -73,6 +74,8 @@ end
 
 println("Day 05 – Task 2 – Case 0")
 open(task1, "day05\\data\\case00.txt") |> display
+@assert open(task1, "day05\\data\\case00.txt") == 12
 
 println("Day 05 – Task 2 – Case 1")
 open(task1, "day05\\data\\case01.txt") |> println
+@assert open(task1, "day05\\data\\case01.txt") == 17741