A Philosophy of Software Design

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• A Philosophy of Software Design Preface - The most fundamental problem in computer science is problem decomposition: how to take a complex problem and divide it up into pieces that can be solved independently. 1 Introduction ### 1.1 How to use this book - The best way to use this book is in conjunction with code reviews.- One of the best ways to improve your design skills is to learn to recognize red flags: signs that a piece of code is probably more complicated than it needs to be. - When applying the ideas from this book, it’s important to use moderation and discretion.- This means that the greatest limitation in writing software is our ability to understand the systems we are creating. - There are two general approaches to fighting complexity, both of which will be discussed in this bo... (查看原文)

  Nova 5赞 2019-04-10 20:06:57

• The best way to eliminate exception handling complexity is to define your APIs so that there are no exceptions to handle: define errors out of existence. This may seem sacrilegious, but it is very effective in practice. Consider the Tcl unset command discussed above. Rather than throwing an error when unset is asked to delete an unknown variable, it should have simply returned without doing anything. I should have changed the definition of unset slightly: rather than deleting a variable, unset should ensure that a variable no longer exists. With the first definition, unset can’t do its job if the variable doesn’t exist, so generating an exception makes sense. With the second definition, it is perfectly natural for unset to be invoked with the name of a variable that doesn’t exist. In this ... (查看原文)

  无心 2019-05-05 13:44:39

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