delegate each_with_index

day_07/2.rb

@@ -5,18 +5,18 @@ require_relative "graph"
 
 class Main
   def run
-    lines = $stdin.readlines(chomp: true)
+    input = $stdin.readlines(chomp: true)
-    graph = Graph.new(lines)
+    graph = Graph.new(input)
     counts = Hash.new(0)
     counts[graph.start.x] = 1
 
-    process_graph(lines, graph, counts)
+    process_graph(graph, counts)
     puts counts.values.sum
   end
 
-  def process_graph(lines, graph, counts)
+  def process_graph(graph, counts)
-    lines.each_with_index do |line, y|
+    graph.each_with_index do |line, y|
-      line.chars.each_with_index do |char, x|
+      line.each_with_index do |char, x|
         current = Point.new(x, y)
 
         next unless graph.at(current) == "^"

day_07/graph.rb

@@ -5,7 +5,7 @@ require_relative "point"
 class Graph
   attr_reader :start, :height, :width
   extend Forwardable
-  def_delegators :@data, :[]
+  def_delegators :@data, :[], :each_with_index
 
   def initialize(input)
     @data = input.each_with_index.map do |line, y|