/**
* Fills a portion of the given array with the given value.
*
* <p>If possible (i.e., <code>from</code> is 0) this method uses a backward loop. In this case,
* it is significantly faster than the corresponding method in {@link java.util.Arrays}.
*
* @param array an array.
* @param from the starting index of the portion to fill.
* @param to the end index of the portion to fill.
* @param value the new value for all elements of the specified portion of the array.
*/
public static void fill(final long[] array, final int from, int to, final long value) {
ensureFromTo(array, from, to);
if (from == 0) while (to-- != 0) array[to] = value;
else for (int i = from; i < to; i++) array[i] = value;
}
