beginnerFunctional Programming
What is the Predicate functional interface in Java, and when do you use it?
Predicate<T> represents a boolean-valued test on a single argument, via its abstract method boolean test(T t). It's the interface Stream.filter() and List.removeIf() expect, and it exposes default methods and(), or(), and negate() for composing multiple conditions, e.g. isAdult.and(isVerified).
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