solved day 1

day01/solution.rb

@@ -0,0 +1,12 @@
+#!/bin/env ruby
+
+depths = File.readlines('./input').map(&:to_i)
+
+# Part 1
+changes  = depths.each_cons(2).map { |first, second| second - first}
+pp changes.reject { |num| num.negative?}.count
+
+# Part 2
+sums = depths.each_cons(3).map { |nums| nums.sum }
+changes = sums.each_cons(2).map { |first, second| second - first}
+pp changes.reject { |num| !num.positive?}.count