“Software design is preparation for change; change of behavior”
Tidy First? is a new book by Kent Beck. It is a short little book, only about 100 pages (and lots of white space on them), but it contains some deep insights about software development. The book has three parts, going from concrete to abstract. First there is a list of 15 tidyings, which are small refactorings. The next part, Managing, discusses how and when to perform the tidyings. The final part, Theory, presents a great framework for how to think about software development, using the concepts of time value of money and optionality.
Henrik Warne's blog 
On Comments in Code
I used to think that I didn’t need comments if I wrote self-documenting code. However, I have realized that I do write comments, and that I find them really useful. To see how many comments I write, and what kind they are, I wrote a script to analyze my git commits from the last six years. In total, seven percent of my committed lines contained a comment. This blog post has details on what constitutes good and bad comments, as well as more statistics from my script.
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