Rafe/Maybe.rb

Created April 24, 2018 17:32

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Rafe created this gist Apr 24, 2018.

Maybe.rb

-Original file line number
+Diff line change
@@ -0,0 +1,17 @@
+    class Maybe
+      def initialize(val)
+        @val = val
+      end
+      def fmap
+        return self if @val.nil?
+        self.class.new(yield @val)
+      end
+      def inspect
+        return 'Nothing' if @val.nil?
+        "Just #{@val.inspect}"
+      end
+    end