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Kiwi is a utility library. We really like Google's Guava, and also use Apache Commons. But if they don't have something we need, and we think it is useful, this is where we put it.

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package org.kiwiproject.stream;

import lombok.experimental.UtilityClass;

import java.util.List;
import java.util.stream.IntStream;

/**
 * Static utilities related to {@link IntStream}.
 */
@UtilityClass
public class IntStreams {

    /**
     * Return an {@link IntStream} whose values are the indices ranging from {@code 0} to {@code values.size() - 1}.
     *
     * @param values the list
     * @param     the list element type
     * @return IntStream of the list indices
     */
    public static  IntStream indicesOf(List values) {
        return IntStream.range(0, values.size());
    }
}