Merge branch 'feature/ruby-canavas'

1 files changed, 7 insertions, 3 deletions

diff --git a/CLI/ruby/lib/game_of_life.rb b/CLI/ruby/lib/game_of_life.rb
index 2ff548c..b1a95f1 100644
--- a/CLI/ruby/lib/game_of_life.rb
+++ b/CLI/ruby/lib/game_of_life.rb
@@ -106,9 +106,13 @@ module GameOfLife
     # and rendering of the current universe/banner info
     # based on the delay/cell configured by the user
     def render(universe)
-      puts "\33c\e[3J" # Clears the screen and scrollback buffer.
-      puts universe.to_s
-      puts BANNER
+      # Use Alternate Screen (\e[?1049h) and move cursor to top left (\e[H)
+      # Ref: https://github.com/ruby/ruby/blob/ruby_2_7/lib/irb/easter-egg.rb#L112-L131
+      # Ref: https://stackoverflow.com/questions/11023929/using-the-alternate-screen-in-a-bash-script
+      # Ref: https://superuser.com/questions/122911/what-commands-can-i-use-to-reset-and-clear-my-terminal
+      print "\e[?1049h\e[H"
+      print universe.to_s
+      print BANNER
       sleep(DELAY / 1000.0)
     end
   end