more quizz

Quiz.md

@@ -8,3 +8,175 @@
   2. ```ruby
        puts "i love ruby" =~ /ruby/
      ```
+
+  3. ```ruby
+       a = {
+         :x => 20,
+         :y => 70
+       }
+       b = {
+         :y => 100,
+         :z => 35
+       }
+       c = {:j => 30, :k => 45}
+
+       puts a.merge(b)[:y] + c.delete(:k)
+     ```
+
+  4. ```ruby
+       class ABC
+         def initialize
+           x = 0
+         end
+
+         def y
+           x + 1
+         end
+       end
+
+       a = ABC.new
+       puts a.y
+     ```
+
+  5. ```ruby
+       module A
+         def x
+           puts "Ax"
+         end
+
+         def y
+           puts "Ay"
+         end
+       end
+
+       module B
+         def y
+           puts "By"
+         end
+
+         def z
+           puts "Bz"
+         end
+       end
+
+       module C
+         def x
+           puts "Cy"
+         end
+
+         def z
+           puts "Cz"
+         end
+       end
+
+       class D
+         include A
+         include B
+         include C
+
+         def x
+           puts "Dx"
+         end
+       end
+
+       d = D.new
+       d.x
+       d.y
+       d.z
+     ```
+
+  6. ```ruby
+       @a = 10
+
+       def m
+         return 1 if @a > 4
+         2
+       rescue
+         3
+       end
+
+       puts m
+     ```
+
+  7. ```ruby
+       def x(y)
+         if block_given?
+           y + 3
+         else
+           5
+         end
+       end
+
+       z = x 5 do |c|
+         c + 5
+       end
+
+       puts z
+     ```
+
+  8. ```ruby
+       class String
+         def upcase
+           "omg"
+         end
+       end
+
+       puts "hello".upcase!
+     ```
+
+  9. ```ruby
+       module M
+         def method_missing(*args)
+           "M"
+         end
+       end
+
+       class C
+         include M
+
+         def n
+           "N"
+         end
+       end
+
+       c = C.new
+       puts c.n + c.m
+     ```
+
+## Berapa jumlah failed test yang terjadi:
+
+  10. ```ruby
+        require 'minitest/autorun'
+
+        class A
+          def x
+            "X"
+          end
+
+          def y
+            5
+          end
+
+          def z
+            raise "Z"
+          end
+        end
+
+        describe A do
+          before do
+            @a = A.new
+          end
+
+          it "should do x" do
+            @a.x.must_equal "X"
+          end
+
+          it "should do y" do
+            @a.y.wont_be_nil
+          end
+
+          it "should do z" do
+            @a.z.must_equal "Z"
+          end
+        end
+      ```