Merge branch 'master' of http://git.doublehack.me/s00ner/AoC2020 into master

day03/solution2.rb

@@ -0,0 +1,38 @@
+#!/bin/env ruby
+
+slopes = {
+    :one => { :right => 1, :down => 1},
+    :two => { :right => 3, :down => 1},
+    :three => { :right => 5, :down => 1},
+    :four => { :right => 7, :down => 1},
+    :five => { :right => 1, :down => 2}
+}
+
+input = Array.new
+File.readlines('./input').each.with_index do |line, i|
+    line.strip!
+    input[i] = line.split('')
+end
+
+input.each do |x|
+    x.map! do |y|
+        y == '#' ? true : false
+    end
+end
+
+collisions = Array.new
+slopes.each do |num, slope|
+    i = 0
+    trees = 0
+    len = input[0].length
+    input.each.with_index do |row, row_num|
+        next if (slope[:down] == 2 and row_num.odd?)
+        trees += 1 if row[i]
+        i +=slope[:right]
+        i = i - len if i >= len
+    end
+    collisions.push(trees)
+    puts "On slope #{num.to_s} We hit #{trees} trees"
+end
+
+puts "Multiplied together we get: #{collisions.inject(:*)}"