By Ken Pugh

ISBN-10: 0596008740

ISBN-13: 9780596008741

Builders engaged on a venture will usually reconsider and recode the software program below building to make its layout purifier and extra based. often called "refactoring," this approach is completed for every type of purposes: to facilitate the addition of latest beneficial properties, to enhance maintainability, and (or) to extend functionality. Refactoring is a crucial and worthwhile software program process.Refactor sufficient instances even though, and you'll start to research issues that you should do while construction new software program to lessen the quantity of refactoring later within the procedure. Taking those lessons-learned and utilizing them on next improvement tasks is a technique that Ken Pugh refers to as "prefactoring".This functional, thought-provoking consultant info prefactoring guidance in layout, code, and checking out, every one derived from the teachings of many builders through the years. via following those directions, you are way more prone to create extra readable and maintainable code than could rather be the case.

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2. Process Analysis concerns describing the user requirements (the problem description), and design concentrates on creating a solution that meets the requirements (the solution definition). The exact boundary between the two is hard to determine, especially with iterative development. A feedback cycle occurs between the two phases. 56 57 Objects created in the design phase often reflect the real-world objects referred to in the requirements. If you state the object definitions in the requirements clearly, the software object definitions will be clear as well.

However, domain-related code requires more explicitness . You cannot assume that another programmer will know (or remember) every detailed piece of information you learned from the customer. EXPLICITNESS BEATS IMPLICITNESS Being explicit reduces misinterpretation. A FEW MORE WORDS GIVE MEANING Microsoft's MFC library has a method called UpdateData( ). The purpose of the method is twofold. It retrieves the values in display controls on the screen and places them into class members, and it sets the values in the controls from the member variables.

Spellchecking ensures that your words are at least spelled correctly, even though they might not be used correctly. Compilers offer syntax checkers. They ensure that the words are used correctly, but they do not ensure that they mean anything. You can run a spellchecker on your code to see whether the code terms have meanings in a particular language. You can parse camelcase words (SomethingLikeThis) or underlined words (something_like_this) into separate words prior to spellchecking. com/catalog/prefactoring for a simple spellchecker that runs on Unix/Linux.

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Prefactoring: extreme abstraction; extreme separation; extreme readability by Ken Pugh

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