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In fact, if you want an excellent book on clean code, we recommend The Art of Readable Code by D. Of course, this is by no means a comprehensive list.
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If you have no choice but to move away from your original choice, explain why in the comments. If you decide to do something a certain way, stick to it throughout the entire project. Practice consistency: This is arguably the overarching principle of all clean code principles. userHasFormAccess over canAccess, which doesn't tell as much). const CACHE_TIME = 200 ) and creating long names instead of shorter ones (e.g. Two examples are placing common numbers into well-named constants (e.g. There are many ways to make your code more readable. There's no point in having concise code if people don't understand it. Particularly when working with multiple people on a project, always favor readability over conciseness. One of the ways to implement this principle is with the Object.assign() method in ES6.Ĭomposition is favored over inheritance by many developers, because inheritance forces you to build a taxonomy of objects early on in a project, making your code inflexible for changes later on.įavor readability: It's not because a machine can read your code that another human can. It's explained in more detail in this video. It's a principle where you design your types over what they do instead of over what they are. YAGNI should be used in conjunction with continuous refactoring, unit testing, and integration.Ĭomposition over inheritance: Not an acronym, sadly.
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YAGNI is part of the Extreme Programming (XP) methodology, which wants to improve software quality and increase responsiveness to customer requirements. A developer should not add functionality unless deemed necessary. Violations of DRY are referred to as WET: We Enjoy Typing, Write Everything Twice, Waste Everyone's Time. It states that every piece of knowledge (code, in this case) must have a single, unambiguous, authoritative representation within a system (codebase).
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Closely related to KISS and the minimalist design philosophy. The question to ask when you're writing code is "can this be written in a simpler way?"ĭRY: Don't Repeat Yourself. Unnecessary complexity should be avoided. It states that most systems should be kept as simple as possible (but not simpler, as Einstein would have said). A design principle originating from the U.S.
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As such, even though the initial question on our Slack channel was about how to keep your JavaScript / TypeScript code clean, X-Teamers replied with some of the general design principles of clean code. Instead, it relies on language-agnostic principles agreed upon by the developer community. Clean Code PrinciplesĬlean code doesn't rely on language-specific rules. Recently, X-Teamers discussed their most important principles to keep their code clean, and we decided to share the best ones with the world. No one writes clean code from the beginning. While it might take longer to write clean code in the short term, it's beyond established that writing clean code will save everyone time, effort, and ultimately money.īut there's always room to learn. Bad code is difficult to understand, more complex than it should be, not easy to test, and it makes other developers seethe with frustration. Bad code works until it's the year 2,000.