Faker::Types minor cleanup (#1362)

* Minor code reuse cleanup

* added examples to docs

doc/types.md

@@ -12,9 +12,13 @@ Faker::Types.rb_integer #=> 1
 
 # Random Hash (with random keys and values)
 Faker::Types.rb_hash #=> {name: "bob"}
+Faker::Types.rb_hash(1) #=> {name: "bob"}
+Faker::Types.rb_hash(2) #=> {name: "bob", last: "marley"}
 
 # Random Complex Hash (values include other hashes and arrays) 
 Faker::Types.complex_rb_hash #=> {user: {first: "bob", last: "marley"}}
+Faker::Types.complex_rb_hash(1) #=> {user: {first: "bob", last: "marley"}}
+Faker::Types.complex_rb_hash(2) #=> {user: {first: "bob", last: "marley"}, son: ["damien", "marley"]}
 
 # Random Array
 Faker::Types.rb_array #=> ["a", 1, 2, "bob"]

lib/faker/types.rb

@@ -24,20 +24,16 @@ def rb_integer(from = 0, to = 100)
         rand(from..to).to_i
       end
 
-      def rb_hash(key_count = 1)
+      def rb_hash(key_count = 1, type = random_type)
         {}.tap do |hsh|
           Lorem.words(key_count * 2).uniq.first(key_count).each do |s|
-            hsh.merge!(s.to_sym => random_type)
+            hsh.merge!(s.to_sym => type)
           end
         end
       end
 
       def complex_rb_hash(key_count = 1)
-        {}.tap do |hsh|
-          Lorem.words(key_count * 2).uniq.first(key_count).each do |s|
-            hsh.merge!(s.to_sym => random_complex_type)
-          end
-        end
+        rb_hash(key_count, random_complex_type)
       end
 
       def rb_array(len = 1)