I used to type in the programs from Commodore 64 Magazine back in the day. If you just touch type them in you learn very little. If I wanted to understand them, I wouldn't do it while typing. Sure a bit rubs off and probably more if you have to understand where to put the code rather than just start typing from the top, but still not enough. If you "make it your own" then you're probably at the right level of understanding.