[devjab]

I'm going to risk being a little nit picky here and I'm sure you mean it differently and just used some bad examples. You really shouldn't be relying on your compiler to tell you that you used the wrong variable, however, and if you are, then you would likely benefit immensely from getting some better tools. Some IDE's will help you a lot of the way, but great linting will frankly completely remove your "need" to check to see if your small changes actually work or not.