From aeb838b832e3f5e8394e23d542c77386372d3bb8 Mon Sep 17 00:00:00 2001
From: Jeff Yates <jeff@z800.lab.doublehack.me>
Date: Tue, 8 Dec 2020 15:49:29 -0500
Subject: [PATCH] solved part 1

---
 day07/solution01.rb | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100755 day07/solution01.rb

diff --git a/day07/solution01.rb b/day07/solution01.rb
new file mode 100755
index 0000000..80fce00
--- /dev/null
+++ b/day07/solution01.rb
@@ -0,0 +1,18 @@
+#!/bin/env ruby
+
+def can_hold? (bags, color)
+    parents = bags.map { |bag| bag[1..].
+        map { |child| bag[0] if child.include?(color)}
+    }.flatten.compact
+    if parents.any?
+        parents += parents.map { |col| can_hold?(bags, col) }
+    end
+    parents.flatten.uniq
+end
+
+bags = File.readlines('./input').map { |line| line.delete('.').strip.split('contain').
+    map { |item| item.strip.split(',')}.flatten
+}
+bags.map { |line| line.map { |str| str.slice!('bags') }}
+bags.map { |line| line.map { |str| str.slice!('bag') }}
+p can_hold?(bags, 'shiny gold').length
\ No newline at end of file