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‎module4/abstraction.md

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<!-- .slide: data-background="#111111" -->
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# Abstraction
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___
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## Abstraction
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* <!-- .element: class="fragment fade-in" --> Interface
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* <!-- .element: class="fragment fade-in" --> The public part of a class
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* <!-- .element: class="fragment fade-in" --> Member function - obvious
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* <!-- .element: class="fragment fade-in" --> Non-member function
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* <!-- .element: class="fragment fade-in" --> Member types
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* <!-- .element: class="fragment fade-in" --> Member fields
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* <!-- .element: class="fragment fade-in" --> Template parameters
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* <!-- .element: class="fragment fade-in" --> Specializations
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* <!-- .element: class="fragment fade-in" --> Example: <a href="https://en.cppreference.com/w/cpp/container/vector"><code>std::vector</code> on cppreference.com</a>
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* <!-- .element: class="fragment fade-in" --> The private part (implementation) is unknown
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* <!-- .element: class="fragment fade-in" --> Object Oriented Design (OOD)
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> Make interfaces easy to use correctly and hard to use incorrectly
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>
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> \-\- Scott Meyers, [Effective C++](https://blog.ycshao.com/2012/11/23/effective-c-item-18-make-interfaces-easy-to-use-correctly-and-hard-to-use-incorrectly/)
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<!-- .element: class="fragment fade-in" -->
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___
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## Bad interface example
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```c++
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// A date class which is easy to use but also easy to use wrong.
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class Date {
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public:
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Date(int month, int day, int year);
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...
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};
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// Both are ok, but some european programmer may use it wrong,
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// because european time format is dd/mm/yyyy instead of mm/dd/yyyy.
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Date d(3, 4, 2000);
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Date d(4, 3, 2000);
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```

‎module4/agenda.md

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<!-- .slide: data-background="#111111" -->
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# Agenda
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* <!-- .element: class="fragment fade-in" --> 4 pillars of objectivity
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* <!-- .element: class="fragment fade-in" --> Abstraction
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* <!-- .element: class="fragment fade-in" --> Encapsulation
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* <!-- .element: class="fragment fade-in" --> Inheritance
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* <!-- .element: class="fragment fade-in" --> Polymorphism

‎module4/cover.md

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<!-- .slide: data-background="#111111" -->
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# Object-oriented C++
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<a href="https://coders.school">
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<img width="500" data-src="../img/coders_school_logo.png" alt="Coders School" class="plain">
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</a>
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### Łukasz Ziobroń

‎module4/encapsulation.md

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<!-- .slide: data-background="#111111" -->
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# Encapsulation
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___
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## Encapsulation
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* <!-- .element: class="fragment fade-in" --> Access specifiers
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* <!-- .element: class="fragment fade-in" --> <code>public</code> - <code>struct</code> default
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* <!-- .element: class="fragment fade-in" --> <code>protected</code>
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* <!-- .element: class="fragment fade-in" --> <code>private</code> - <code>class</code> default
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* <!-- .element: class="fragment fade-in" --> Setters and getters
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* <!-- .element: class="fragment fade-in" --> Unnamed namespaces

‎module4/exercise_cars.md

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<!-- .slide: data-background="#111111" -->
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# Exercise
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___
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## Cars
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1. <!-- .element: class="fragment fade-in" --> Design proper abstraction (interfaces)
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2. <!-- .element: class="fragment fade-in" --> Apply inheritance
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3. <!-- .element: class="fragment fade-in" --> Fix encapsulation
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4. <!-- .element: class="fragment fade-in" --> Use polymorphism to represent every type of car, using a single pointer
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5. <!-- .element: class="fragment fade-in" --> Fix diamond problem
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6. <!-- .element: class="fragment fade-in" --> Fix potential memory leaks
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7. <!-- .element: class="fragment fade-in" --> Think about the way of keeping engines in cars. Should they be kept by a value, reference or a pointer (what kind of pointer)?
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8. <!-- .element: class="fragment fade-in" --> Is this code testable?
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### [View task in repo](https://github.com/coders-school/Cars.git)
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<!-- .element: class="fragment fade-in" -->

‎module4/index.html

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<!doctype html>
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<html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
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<title>Object-oriented C++</title>
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<meta name="description" content="C++11, C++14 and C++17 presentation">
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<meta name="author" content="Lukasz Ziobron">
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<link rel="stylesheet" href="../css/reset.css">
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<link rel="stylesheet" href="../css/reveal.css">
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<link rel="stylesheet" href="../css/theme/coders.css" id="theme">
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<!-- Theme used for syntax highlighting of code -->
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<link rel="stylesheet" href="../lib/css/monokai.css">
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<!-- Printing and PDF exports -->
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<script>
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var link = document.createElement('link');
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link.rel = 'stylesheet';
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link.type = 'text/css';
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link.href = window.location.search.match(/print-pdf/gi) ? 'css/print/pdf.css' : 'css/print/paper.css';
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document.getElementsByTagName('head')[0].appendChild(link);
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</script>
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</head>
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<body>
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<div class="reveal">
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<div class="slides">
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<section data-markdown="../md.object_oriented/cover.md" data-separator-vertical="^___"
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data-separator-notes="^Note:">
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</section>
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<section data-markdown="../md.object_oriented/agenda.md" data-separator-vertical="^___"
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data-separator-notes="^Note:">
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</section>
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<section data-markdown="../md.object_oriented/pillars.md" data-separator-vertical="^___"
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data-separator-notes="^Note:">
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</section>
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<section data-markdown="../md.object_oriented/abstraction.md" data-separator-vertical="^___"
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data-separator-notes="^Note:">
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</section>
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<section data-markdown="../md.object_oriented/encapsulation.md" data-separator-vertical="^___"
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data-separator-notes="^Note:">
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</section>
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<section data-markdown="../md.object_oriented/inheritance.md" data-separator-vertical="^___"
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data-separator-notes="^Note:">
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</section>
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<section data-markdown="../md.object_oriented/polymorphism.md" data-separator-vertical="^___"
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data-separator-notes="^Note:">
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</section>
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<section data-markdown="../md.object_oriented/exercise_cars.md" data-separator-vertical="^___"
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data-separator-notes="^Note:">
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</section>
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<section data-markdown="../md.object_oriented/post_work.md" data-separator-vertical="^___"
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data-separator-notes="^Note:">
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</section>
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<section data-markdown data-background="#111111">
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<!-- Added ending slide -->
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# The End &#128522 !
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</section>
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</div>
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</div>
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<script src="../js/reveal.js"></script>
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<script>
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// More info about config & dependencies:
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// - https://github.com/hakimel/reveal.js#configuration
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// - https://github.com/hakimel/reveal.js#dependencies
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Reveal.initialize({
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width: 1200,
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height: 750,
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slideNumber: true,
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hash: true,
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pdfSeparateFragments: false,
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dependencies: [
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{ src: '../plugin/externalcode/externalcode.js', condition: function() { return !!document.querySelector( '[data-code]' ); } },
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{ src: '../plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
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{ src: '../plugin/markdown/marked.js' },
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{ src: '../plugin/markdown/markdown.js' },
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{ src: '../plugin/notes/notes.js', async: true }
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]
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});
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</script>
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</body>
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</html>

‎module4/inheritance.md

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<!-- .slide: data-background="#111111" -->
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# Inheritance
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___
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## Inheritance
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* <!-- .element: class="fragment fade-in" --> Constructors and destructors call order
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* <!-- .element: class="fragment fade-in" --> Constructors - base class first, then derived
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* <!-- .element: class="fragment fade-in" --> <a href="https://ideone.com/Kgb46n">ideone.com</a>
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* <!-- .element: class="fragment fade-in" --> Diamond problem
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* <!-- .element: class="fragment fade-in" --> virtual inheritance
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* <!-- .element: class="fragment fade-in" --> <code>class</code> from <code>struct</code> inheritance is...
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* <!-- .element: class="fragment fade-in" --> <a href="https://ideone.com/Rdd6Uf"><code>private</code></a>
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* <!-- .element: class="fragment fade-in" --> <code>struct</code> from <code>class</code> inheritance is...
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* <!-- .element: class="fragment fade-in" --> <a href="https://ideone.com/x46OvN"><code>public</code></a>
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___
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## Inheritance access modifiers
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| | <code>public</code> | <code>protected</code> | <code>private</code> |
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| :------------------------: | :-------------------------------------------------------: | :-------------------------------------------------------: | :-----------------------------------------------------: |
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| **<code>public</code>** | public <!-- .element style="background-color: #0a0;"--> | protected<!-- .element style="background-color: #da0;"--> | private<!-- .element style="background-color: #a00;"--> |
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| **<code>protected</code>** | protected<!-- .element style="background-color: #da0;"--> | protected<!-- .element style="background-color: #da0;"--> | private<!-- .element style="background-color: #a00;"--> |
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| **<code>private</code>** | private <!-- .element style="background-color: #a00;"--> | private <!-- .element style="background-color: #a00;"--> | private<!-- .element style="background-color: #a00;"--> |

‎module4/pillars.md

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<!-- .slide: data-background="#111111" -->
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# The four pillars of objectivity
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* <!-- .element: class="fragment fade-in" --> Abstraction
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* <!-- .element: class="fragment fade-in" --> Encapsulation
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* <!-- .element: class="fragment fade-in" --> Inheritance
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* <!-- .element: class="fragment fade-in" --> Polymorphism

‎module4/polymorphism.md

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<!-- .slide: data-background="#111111" -->
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# Polymorphism
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___
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## Polymorphism
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* <!-- .element: class="fragment fade-in" --> Virtual functions
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* <!-- .element: class="fragment fade-in" --> Pure virtual functions (<code>=0</code>)
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* <!-- .element: class="fragment fade-in" --> Abstract classes
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* <!-- .element: class="fragment fade-in" --> have at least one pure virtual function
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* <!-- .element: class="fragment fade-in" --> <code>vtable</code> and <code>vptr</code>
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* <!-- .element: class="fragment fade-in" --> implementation of polymorphism
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* <!-- .element: class="fragment fade-in" --> constructor of derived class overrides base class records in <code>vtable</code>

‎module4/post_work.md

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<!-- .slide: data-background="#111111" -->
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# Post-work
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___
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## Post-work
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You can work in groups or individually. Fork the Cars repo and submit a Pull Request after you have finished.
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1. <!-- .element: class="fragment fade-in" --> Create <code>InvalidGear</code> exception. It should be thrown when someone tries eg. change a gear from 5 to R. It should inherit from one of STL exceptions
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2. <!-- .element: class="fragment fade-in" --> Fix interfaces to be easy to use correctly and hard to use incorrectly (like <code>accelerate(-999)</code>)
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3. <!-- .element: class="fragment fade-in" --> (Optional) Write a proper unit tests to this code
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4. <!-- .element: class="fragment fade-in" --> Read one of below articles. It will be useful for the next lesson
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* <!-- .element: class="fragment fade-in" --> <a href="https://www.samouczekprogramisty.pl/solid-czyli-dobre-praktyki-w-programowaniu-obiektowym/">SOLID czyli dobre praktyki w programowaniu obiektowym</a> (in Polish)
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* <!-- .element: class="fragment fade-in" --> <a href="https://scotch.io/bar-talk/s-o-l-i-d-the-first-five-principles-of-object-oriented-design">S.O.L.I.D: The First 5 Principles of Object Oriented Design</a> (in English)

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