Solved day 2

day02/solution.rb

@@ -0,0 +1,33 @@
+#!/bin/env ruby
+
+commands = File.readlines('./input').map(&:split).map{ [_1.to_sym,_2.to_i] }
+# Part 1
+dist, depth = 0,0
+commands.each do |command, unit|
+    case command
+    when :forward
+        dist += unit
+    when :down
+        depth += unit
+    when :up
+        depth -= unit
+    end
+end
+
+p dist * depth
+
+# Part 2
+dist, depth, aim = 0,0,0
+commands.each do |command, unit|
+    case command
+    when :forward
+        depth += aim * unit
+        dist += unit
+    when :down
+        aim += unit
+    when :up
+        aim -= unit
+    end
+end
+
+p dist * depth