finished solution 2

day06/solution02.rb

@@ -0,0 +1,17 @@
+#!/bin/env ruby
+
+groups = Hash.new
+text =  File.read('./input').strip.split("\n\n")
+
+people = text.map { |t| t.count("\n") + 1 }
+
+text.map!.with_index do |t, i|
+    t.delete!("\n")
+    t.each_char { |c| t.delete!(c) if t.count(c) != people[i] }
+    t.split('').uniq.reduce(:+)
+end
+
+text.compact!
+size = text.map { |t| t.length }.reduce(:+)
+
+p size