So yea. I guess this thread belongs in debugging section, because it is about debugging 
What the problem I have is that my theory and implementation is usually “near perfect” to what I want. Just now I made something and it didn’t work properly. I was looking through huge chunks of my code to find the possible error. And the error was that I made a “typo”, but with variable. Was supposed to be i / width, but I typed i / height. I knew how it was supposed to be, but I just wasn’t thinking about what I was typing at that moment. That took away 10 minutes of my precious time 
And this happens all the time for me
Do you get these “typos” ?