Java Predicate - explaining predicates in Java
https://zetcode.com/java/predicate12.11.2021 · Java Predicate. Predicates in Java are implemented with interfaces. Predicate<T> is a generic functional interface representing a single argument function that returns a boolean value. It is located in the java.util.function package. It contains a test(T t) method that evaluates the predicate on the given argument.. In Java we do not have standalone functions.
Predicates - Racket
https://docs.racket-lang.org/predicates/index.htmlPredicates. These functions allow for easy construction of predicates - functions that take an input and return a boolean - for use with contracts and filter variants. This library makes it easy to define predicates in a point-free style, meaning that you can construct new predicates in terms of old predicates without defining them as functions ...