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120 lines
4.7 KiB
120 lines
4.7 KiB
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<a href="https://blog.juliobiason.me"><h1>Julio Biason .Me 4.3</h1></a> |
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<p class="lead">Old school dev living in a 2.0 dev world</p> |
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<h1 class="post-title">Things I Learnt The Hard Way - Be Ready To Throw Your Code Away</h1> |
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<span class="post-date"> |
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2019-06-19 |
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<a href="https://blog.juliobiason.me/tags/book/">#book</a> |
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<a href="https://blog.juliobiason.me/tags/things-i-learnt/">#things i learnt</a> |
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<a href="https://blog.juliobiason.me/tags/code/">#code</a> |
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<p>A lot of people, when they start with TDD, get annoyed when you say that you |
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may have to rewrite a lot of stuff, including whatever your already wrote.</p> |
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<span id="continue-reading"></span> |
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<p>TDD was <em>designed</em> to throw code away: The more you learn about your problem, |
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the more you understand that, whatever you wrote, won't solve the problem in |
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the long run. Also, as you slowly solve new problems, you may notice some |
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pattern in the code emerging (you're doing the same thing over and over, with |
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only minor changes). That's a good time to go over and rewrite everything to |
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take advantage of this pattern.</p> |
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<p>You shouldn't worry about this. Your code is not a wall (or any physical |
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object): if you have to throw it away, you didn't wasted materials. Surely it |
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means your time writing code was lost, but you got a better understanding |
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about the problem now, or you may start to think in a more concise way to |
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solve the problem.</p> |
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<p>Not only that, but as you progress through your project, solving problems and |
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getting "acquainted" with the problem, you'll also notice that the |
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<a href="/books/things-i-learnt/spec-first">spec</a> will also change. This means that |
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the problem your code solve wasn't exactly the problem you <em>needed</em> to solve; |
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your code is trying to solve something that isn't exactly the problem.</p> |
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<p>Also, specs changing is really common. One thing that you can be sure is that |
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it won't change <em>everywhere</em>. Some of the things you solved will stay the |
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same, some others will be completely removed and some others added. And you |
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will see that you'll refactor your code a lot, and throw a lot of code away. |
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And not just code that solves the problem, but also the tests for that code.</p> |
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<p>... unless you focus mostly on <a href="/books/things-i-learnt/integration-tests">integration |
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tests</a>.</p> |
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<< <a href="/books/things-i-learnt/paper-notes">Be Ready To Throw Your Code Away</a> |
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<a href="/books/things-i-learnt/future-trashing">Future Thinking Is Future Trashing</a> >> |
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