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<section id="the-importance-of-writing-good-code">
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<h1>The Importance of Writing Good Code<a class="headerlink" href="#the-importance-of-writing-good-code" title="Permalink to this headline">#</a></h1>
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<p>GNOME is a very ambitious free software project, and it is composed of many
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software packages that are more or less independent of each other. A lot of the
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work in GNOME is done by volunteers: although there are many people working on
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GNOME full-time or part-time for here, volunteers still make up a large
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percentage of our contributors. Programmers may come and go at any time and they
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will be able to dedicate different amounts of time to the GNOME project.
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People’s “real world” responsibilities may change, and this will be reflected in
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the amount of time that they can devote to GNOME.</p>
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<p>Software development takes long amounts of time and painstaking effort. This is
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why most part-time volunteers cannot start big projects by themselves; it is
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much easier and more rewarding to contribute to existing projects, as this
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yields results that are immediately visible and usable.</p>
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<p>Thus, we conclude that it is very important for existing projects to make it as
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easy as possible for people to contribute to them. One way of doing this is by
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making sure that programs are easy to read, understand, modify, and maintain.</p>
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<p>Messy code is hard to read, and people may lose interest if they cannot decipher
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what the code tries to do. Also, it is important that programmers be able to
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understand the code quickly so that they can start contributing with bug fixes
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and enhancements in a short amount of time. Source code is a form of
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communication, and it is more for people than for computers. Just as someone
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would not like to read a novel with spelling errors, bad grammar, and sloppy
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punctuation, programmers should strive to write good code that is easy to
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understand and modify by others.</p>
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<p>The following are some important qualities of good code:</p>
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<dl class="simple">
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<dt><strong>cleanliness</strong></dt><dd><p>Clean code is easy to read with minimum effort. This lets people start to
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understand it easily. This includes the coding style itself (brace placement,
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indentation, variable names), and the actual control flow of the code.</p>
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</dd>
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<dt><strong>consistency</strong></dt><dd><p>Consistent code makes it easy for people to understand how a program works.
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When reading consistent code, one subconsciously forms a number of
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assumptions and expectations about how the code works, so it is easier and
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safer to make modifications to it. Code that <em>looks</em> the same in two places
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should <em>work</em> the same, too.</p>
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</dd>
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<dt><strong>extensibility</strong></dt><dd><p>General-purpose code is easier to reuse and modify than very specific code
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with lots of hardcoded assumptions. When someone wants to add a new feature to
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a program, it will obviously be easier to do so if the code was designed to be
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extensible from the beginning. Code that was not written this way may lead
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people into having to implement ugly hacks to add features.</p>
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</dd>
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<dt><strong>correctness</strong></dt><dd><p>Finally, code that is designed to be correct lets people spend less time
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worrying about bugs, and more time enhancing the features of a program. Users
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also appreciate correct code, since nobody likes software that crashes. Code
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that is written for correctness and safety (i.e. code that explicitly tries to
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ensure that the program remains in a consistent state) prevents many kinds of
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silly bugs.</p>
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</dd>
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</dl>
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<section id="book-references">
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<h2>Book references<a class="headerlink" href="#book-references" title="Permalink to this headline">#</a></h2>
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<ul class="simple">
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<li><p><a class="reference external" href="http://www.cc2e.com/">Code Complete</a>, by Steve McConnell</p></li>
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<li><p><a class="reference external" href="http://martinfowler.com/books/refactoring.html">Refactoring: Improving the Design of Existing Code</a>, by Martin Fowler.</p></li>
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<li><p><a class="reference external" href="https://en.wikipedia.org/wiki/Design_Patterns">Design Patterns: Elements of Reusable Object-Oriented Software</a>, by Erich Gamma, Richard Helm, Ralph Johnson and John Vlissides.</p></li>
|
||
<li><p><a class="reference external" href="http://astore.amazon.com/gnomestore-20/detail/020163385X">Object-Oriented Design Heuristics</a>, by Arthur Riel.</p></li>
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</ul>
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</section>
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</section>
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<ul>
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<li><a class="reference internal" href="#">The Importance of Writing Good Code</a><ul>
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<li><a class="reference internal" href="#book-references">Book references</a></li>
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