foreach中帶index

彌補Java的foreach不能獲取index的不足：

import java.util.Objects;
import java.util.function.BiConsumer;

public class IterableUtils {
    public static <T> void forEach(Integer startIndex,
			           Iterable<? extends T> elements,
				   BiConsumer<Integer, ? super T> action
				   ) {
        Objects.requireNonNull(elements);
        Objects.requireNonNull(action);
        for (T element : elements) {
            action.accept(startIndex++, element);
        }
    }
}
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調用：

IterableUtils.forEach(0, list, (index, value) -> {
	//TODO
});
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