Difference between revisions of "Render Part D Assignment"
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<code>include Composite</code> | <code>include Composite</code> | ||
− | Warning: Do '''NOT''' use the <code>include</code> keyword in Ruby as you would typically in C or C++. Be sure to include within the intended class definition. If you include | + | [[File:Warning_icon.svg|100px]] Warning: Do '''NOT''' use the <code>include</code> keyword in Ruby as you would typically in C or C++. Be sure to include within the intended class or module definition. If you <code>include</code> at the top-level, it will mixin to <code>Object</code>! This may or may not rip a hole in the universe. |
==Scene== | ==Scene== |
Revision as of 04:44, 8 December 2020
In this studio we will evolve our code from Render_Part_C_Assignment to leverage mixins.
Continue editing files in the render/assignment directory.
Contents
Code to Implement
Composite
file: | src/main/ruby/render/assignment/composite.rb | |
module: | Composite | |
methods: | initialize_components push_component(component) each_component |
module Composite should define methods push_component and each_component as well as include the Enumerable module.
push_component
push a component onto an array.
each_component
if a block is given, yield for each component. otherwise return a new Enumerator of the components.
Enumerable
to add a number of useful methods, include the Enumerable module and use alias_method to alias an :each
method to the :each_component
method.
CompositeTransform
Mixin your Composite module to the CompositeTransform class and clean up existing code.
include Composite
Warning: Do NOT use the include
keyword in Ruby as you would typically in C or C++. Be sure to include within the intended class or module definition. If you include
at the top-level, it will mixin to Object
! This may or may not rip a hole in the universe.
Scene
include Composite and clean up existing code.
Testing Your Solution
Unit Test
file: | src/test/ruby/render/part_d/part_d_unit_test.rb | UnitTest |
note: ensure that you have removed all printing to receive credit for any assignment.