Add graduate.rb

Author: feelform

bitset/graduate.rb

@@ -0,0 +1,23 @@
+
+
+FRUIT = { 1 => 'Orange', 2 => 'Banana', 4 => 'Cherry', 8 => 'Apple' }  # => {1=>"Orange", 2=>"Banana", 4=>"Cherry", 8=>"Apple"}
+
+def mask_fruit(a, b)
+  a | b               # => 9
+end                   # => :mask_fruit
+
+def unmask_fruit(masked)
+  FRUIT.select { |k, _| (masked | k) == masked }  # => {1=>"Orange", 8=>"Apple"}
+end                                               # => :unmask_fruit
+
+mask = mask_fruit 1, 8  # => 9
+unmask_fruit mask       # => {1=>"Orange", 8=>"Apple"}
+
+
+def graduate(semester, taken)
+  
+end  # => :graduate
+
+"4 4 4 4".split.map(&:to_i)  # => [4, 4, 4, 4]
+
+