@ReedSpool That looks really interesting. Would it be possible to add some kind of I/O?

@FryAmTheEggman explanation added for :ffff*

Thanks! I wouldn't have expected ff to work like that at all, it's pretty cool

I wish Dennis's suggestion for k was implemented (to be f mapping over the second list by default). It's quite rare that you can chain f as easily as that. Often you'll end up doing stuff like \f{\...} when wanting to map over one of two lists with f

Yeah, the comparable L and R from Pyth are useful, and they rarely chain well at all :P

Although it might make your CJam programs look somewhat vulgar: fk*ffk* ;)

:P