class FunctionTools

Calls a function with a single argument.
Can be called repeatedly if the return type is a function

Swaps the order of two function arguments

Calls a function that generates a value from nothing

Produces a function that inverts the result of a function returning Bool

Composes two functions

Composes two functions in reverse order, like a pipeline operator

Builds a function that returns a transformed value if it matches some predicate, or None if it doesn't