predicate library

Functions

and<A>(Predicate<A> first) → Predicate<A> Function(Predicate<A> ): Creates a new predicate that is the logical conjunction of two given predicates.
contramap<B, A>(A f(B)) → Predicate<B> Function(Predicate<A> ): Transforms a predicate using a function.
match<A, B>(B onFalse(A value), B onTrue(A value)) → B Function(A) Function(Predicate<A> ): Matches a value against a predicate and returns a function.
not<A>(Predicate<A> predicate) → Predicate<A>: Creates a new predicate that is the logical negation of a given predicate.
or<A>(Predicate<A> first) → Predicate<A> Function(Predicate<A> ): Creates a new predicate that is the logical disjunction of two given predicates.

Predicate<A> = bool Function(A value): Defines a function that takes a value of type A and returns a boolean.