Added separate regexes for fractions, single and mixed and beefed up …

…the recognition of those fractions

lib/fractional.rb

@@ -1,6 +1,9 @@
 require 'rational'
 
 class Fractional
+  @@fractions = /^\s*\-?(?:(\d*)\s+)?(\d+)\/(\d+)\s*$/
+  @@single_fraction = /^\s*(\-?\d+)\/(\d+)\s*$/
+  @@mixed_fraction = /^\s*(\-?\d*)\s+(\d+)\/(\d+)\s*$/
 
   def initialize(value)
     @value = value
@@ -24,7 +27,7 @@ def self.to_f(value)
     result = 0
 
     if mixed_fraction?(value)
-      whole, numerator, denominator = value.scan(/(\-?\d*)\s+(\d+)\/(\d+)/).flatten
+      whole, numerator, denominator = value.scan(@@mixed_fraction).flatten
 
       result = (numerator.to_f / denominator.to_f) + whole.to_f.abs
 
@@ -74,15 +77,15 @@ def self.round_to_nearest_fraction(value, to_nearest_fraction)
   private
 
   def self.fraction?(value)
-    value.to_s.count('/') == 1
+    value.is_a? String and value.match(@@fractions)
   end
 
   def self.single_fraction?(value)
-    fraction?(value) and !mixed_fraction?(value)
+    fraction?(value) and value.match(@@single_fraction)
   end
 
   def self.mixed_fraction?(value)
-    fraction?(value) and value.match(/\-?\d*\s+\d+\/\d+/)
+    fraction?(value) and value.match(@@mixed_fraction) 
   end
 
   def self.get_decimal_point_value(value)