Naming conventions

By convention, the names of procedures that always return a boolean value usually end in ``?''. Such procedures are called predicates.?

By convention, the names of procedures that store values into previously allocated locations (see section ) usually end in ``!''. Such procedures are called mutation procedures. By convention, the value returned by a mutation procedure is unspecified. !

By convention, ``->'' appears within the names of procedures that take an object of one type and return an analogous object of another type. For example, list->vector takes a list and returns a vector whose elements are the same as those of the list.->

Terms that need defining: thunk, command (what else?).