[2024][ruby][6.x] optimize obstacles

6 days ago · d45a1cd455
parent a7822ce4f1
commit d45a1cd455
1 changed files with 3 additions and 2 deletions
--- a/2024/ruby/day_06.rb
+++ b/2024/ruby/day_06.rb
@ -44,10 +44,11 @@ rescue Loop
  true
 end

-pp patrol(input).map(&:first).to_set.length
+path = patrol(input).map(&:first).to_set
+pp path.length

 pp input
-  .select { _2 == ?. }
+  .select { path.include?(_1) && _2 != ?^ }
  .select {|xy, _|
    # pp xy
    input[xy] = ?#