Prep for 3

AoC2/main.swift

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+//
+//  main.swift
+//  AoC2
+//
+//  Created by Marijn Doeve on 01-12-2021.
+//
+
+import Foundation
+
+var dept = 0
+var horizontalPosition = 0
+
+let fileContent = try! String(contentsOfFile: CommandLine.arguments[1])
+for line in fileContent.trimmingCharacters(in: .newlines).components(separatedBy: .newlines) {
+    let parts = line.components(separatedBy: " ")
+    
+    let direction = parts[0]
+    let number = Int(parts[1])!
+    
+    switch direction {
+    case "forward":
+        horizontalPosition += number
+    case "down":
+        dept += number
+    case "up":
+        dept -= number
+    default: break
+    }
+}
+
+print("a:", horizontalPosition * dept)
+
+var aim = 0
+var deptB = 0
+var horizontalPositionB = 0
+
+
+for line in fileContent.trimmingCharacters(in: .newlines).components(separatedBy: .newlines) {
+    let parts = line.components(separatedBy: .whitespaces)
+    
+    let direction = parts[0]
+    let number = Int(parts[1])!
+    
+    switch direction {
+    case "up":
+        aim -= number
+    case "down":
+        aim += number
+    case "forward":
+        horizontalPositionB += number
+        deptB += aim * number
+    default: break
+    }
+}
+
+print("b:", horizontalPositionB * deptB)