exercism-70 Beer Song

Author: kumar91gopi

README.md

@@ -287,6 +287,7 @@ solution of many challenges of [Leetcode](https://leetcode.com/), [Exercism](htt
 67. [Allergies](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/allergies.rb)
 68. [Run Length Encoding](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/run_length_encoding.rb)
 69. [Robot Simulator](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/robot_simulator.rb)
+70. [Beer Song](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/beer_song.rb)
 
 <a name="leetcode"/>
 

exercism/beer_song.rb

@@ -0,0 +1,30 @@
+# Problem: https://exercism.org/tracks/ruby/exercises/beer-song
+
+# Solution
+module BeerSong
+    def self.recite(bottles, verses)
+      output = []
+      verses.times do
+        output << verse(bottles)
+        bottles -= 1
+      end
+      output.join("\n")
+    end
+    
+    def self.verse(bottles)
+      standard_verse = <<~TEXT
+        #{bottles} bottles of beer on the wall, #{bottles} bottles of beer.
+        Take one down and pass it around, #{bottles - 1} bottle#{'s' if bottles > 2 } of beer on the wall.
+        TEXT
+      single_bottle_verse = <<~TEXT
+        1 bottle of beer on the wall, 1 bottle of beer.
+        Take it down and pass it around, no more bottles of beer on the wall.
+        TEXT
+      no_bottles_verse = <<~TEXT
+        No more bottles of beer on the wall, no more bottles of beer.
+        Go to the store and buy some more, 99 bottles of beer on the wall.
+        TEXT
+      return no_bottles_verse if bottles.zero?
+      bottles > 1 ? standard_verse : single_bottle_verse
+    end
+end