exercism 58

Author: kumar91gopi

README.md

@@ -275,6 +275,7 @@ solution of many challenges of [Leetcode](https://leetcode.com/), [Exercism](htt
 55. [Pythogorean Triplet](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/pythogorean_triplet.rb)
 56. [Collatz Conjecture](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/collatz_conjecture.rb)
 57. [Seive](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/seive.rb)
+58. [Proverb](https://github.com/kumar91gopi/Algorithms-and-Data-Structures-in-Ruby/blob/master/exercism/proverb.rb)
 
 <a name="leetcode"/>
 

exercism/proverb.rb

@@ -0,0 +1,37 @@
+#Problem: https://exercism.org/tracks/ruby/exercises/proverb
+
+#Solution
+class Proverb
+    def initialize(*inputs,qualifier:nil)
+      @proverb = ""
+      base_line = "For want of a %{first} the %{second} was lost.\n"
+      last_line = "And all for the want of a %{qualifier}."
+      qualifier = qualifier.nil? ? inputs[0] : "#{qualifier} #{inputs[0]}"
+      input_len = inputs.length
+      for i in 0..input_len-2
+        @proverb+= base_line % {first: inputs[i],second:inputs[i+1]}
+      end
+      @proverb+= last_line % {qualifier:qualifier}
+    end
+
+    def to_s
+      @proverb
+    end
+end
+
+#Solution 2 (using each_cons to simplify iterations)
+class Proverb
+    def initialize(*inputs,qualifier:nil)
+      @proverb = ""
+      base_line = "For want of a %{first} the %{second} was lost.\n"
+      last_line = "And all for the want of a %{qualifier}."
+      qualifier = qualifier.nil? ? inputs[0] : "#{qualifier} #{inputs[0]}"
+      inputs.each_cons(2) do |items|
+        @proverb+= base_line % {first: items[0],second:items[1]}
+      end
+      @proverb+= last_line % {qualifier:qualifier}
+    end
+    def to_s
+      @proverb
+    end
+end