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DOM Scripting By Example

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Refactoring

1:01 with Guil Hernandez and Joel Kraft

Refactoring is a process that naturally follows the initial coding stage, where you go back through your program and make what you wrote more concise and readable.

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    We've created an app that behaves the way we want. 0:00
    So it's tempting to think the work is done. 0:02
    But what if you or someone else needs to change this app in the future? 0:05
    If you don't organize your code well, it could be challenging for 0:09
    someone else to step in and understand how the program works. 0:11
    It could even be challenging for you to return to some of your old programs 0:14
    if you didn't take the time to organize their code. 0:18
    When you're working on a project, your mind often moves around in creative and 0:21
    wandering ways. 0:25
    Your code follows where your mind goes, that's a good thing, and 0:26
    it can help you come up with creative solutions you didn't think of 0:29
    when you first planned out your program. 0:32
    But when you solve those problems, it's important to go back and 0:34
    clean up your code. 0:37
    This is called refactoring. 0:39
    And it's the process of rewriting code while leaving the original 0:40
    behavior exactly the same. 0:44
    In other words, when you're done refactoring, 0:46
    nothing to change in the way your app behaves externally. 0:48
    But your code should be easier to read, easier to update, and 0:51
    maybe even work more effectively and efficiently. 0:54
    So let's look at our app and see what opportunities there might be for 0:56
    cleaning up our code. 0:59

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