Thanks.
By the way it is best that when you post a link to code on GitHub you also include the commit hash in that it in order to keep the link valid forever. For instance https://github.com/bitcoin/bitcoin/blob/master/src/script/interpreter.cpp#L659 (from your blog post) right now is pointing to an empty line since it is on master and due to changes in that file over time.
You could do that by simply pressing Y (on your keyboard) to get the permanent link instead: https://github.com/bitcoin/bitcoin/blob/46d6930f8c7ba7cbcd7d86dd5d0117642fcbc819/src/script/interpreter.cpp#L659