Curry, Compose, and other higher-order functions

Documentation for package ‘functional’ version 0.4

Compose	Compose an arbitrary number of functions.
Curry	Pre-specify a procedures named parameters, returning a new procedure.
CurryL	Lazy curry; thanks, Jamie! <https://github.com/klutometis/R-functional/issues/1>
Identity	Identity function.
Negate	Negate a function; borrowed from src/library/base/R/funprog.R for pre-2.7 Rs.