[2022][ruby][5.x]

2022/ruby/day_05.rb

@@ -0,0 +1,18 @@
+setup, moves = ARGF.read.split("\n\n")
+
+setup = setup
+  .lines(chomp: true)
+  .map(&:chars)
+  .transpose
+  .select { _1.last =~ /\d/ }
+  .map { _1[0..-2].join.strip.chars }
+
+moves = moves.scan(/move (\d+) from (\d+) to (\d+)/).map { _1.map(&:to_i) }
+moves.each do |n,from,to|
+  # n.times {
+  #   setup[to-1].unshift(setup[from-1].shift)
+  # }
+  setup[to-1].unshift(*setup[from-1].shift(n))
+end
+
+p setup.map(&:first).join