Is there a underscore.js lib for java?

Question

I use javascript often, and find underscorejs is very handy for manipulating data set, such as array or object.

I am very new to Java, and wonder if there is similar lib for Java?

Answer 1

There is a library underscore-java. Live example

import com.github.underscore.U;

public class Main {
    public static void main(String args[]) {
        String[] words = {"Gallinule", "Escambio", "Aciform", "Entortilation", "Extensibility"};

        Number sum = U.chain(words)
            .filter(w -> w.startsWith("E"))
            .map(w -> w.length())
            .sum().item();
        System.out.println("Sum of letters in words starting with E... " + sum);
    }
}

// Sum of letters in words starting with E... 34