FJ (Functional Java)

Functional library for Java.

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Example: map over a list and apply a function

import static fj.data.List.list;
import fj.data.List;
import static fj.Show.intShow;
import static fj.Show.listShow;

public final class ListMapExample {
    public static void main(final String[] args) {
        final List<Integer> a = list(1, 2, 3).map(i -> i + 42);
        listShow(intShow).println(a); // [43,44,45]

        // combined into a single line
        listShow(intShow).println(list(1, 2, 3).map(i -> i + 42)); // [43,44,45]
    }
}

Tags: library   jvm   language   functional  

Last modified 16 December 2024