> is that the right word? Higher-order functions, or "combinators" if you want to sound all math-y. They're not really list iterators, because it makes just as

> is that the right word? Higher-order functions, or "combinators" if you want to sound all math-y. They're not really list iterators, because it makes just as much sense to map or fold over trees, arrays, matrices, etc. Whether you need structure-specific versions like maplist, maptree, etc. is just an implementation detail.