18 Lessons From 13 Years of Tricky Bugs
In Learning From Your Bugs, I wrote about how I have been keeping track of the most interesting bugs I have come across. I recently reviewed all 194 entries (going back 13 years), to see what lessons I have learned from them. Here are the most important lessons, split into the categories of coding, testing and debugging: Coding These are all issues that have caused difficult bugs for me in the pas
How to spy on a Ruby program
June 12, 2016 I love debugging tools. One of the most frustrating things to me is – when I run a Ruby or Python program, I can’t find out what that program is doing RIGHT NOW. You might eagerly interrupt me – julia, you say, you can use pdb! or pry! or rbtrace!. So, let me explain. If I’m running a program on the JVM with PID 4242, I can run jstack -p 4242, and it will print the current stack trac
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