[Dn_Ab]

They do and I started with Qbasic. Actually I find them more natural and find for-loops to be cumbersome. Fold took the longest.

I think how well things stick is a function of how much you think the effort of learning it is worth and how much time you spend on it. Regular Expressions never stuck for me either, I keep having to relearn it. If you are not intent on picking up a new paradigm or are not addicted to being constantly confused (me) then you rarely escape that valley.

[pvidler]

Yeah, that last part is my concern -- if I can't use FP on a daily basis, is it still worth my time to try learning it?

[tincholio]

Yes, it's very mind-expanding, even if you don't use it much in your day-to-day stuff.