From 034ed33e47a8487fbd3fda7eb555b053d6d0545d Mon Sep 17 00:00:00 2001
From: Gilles Sadowski <erans@apache.org>
Date: Fri, 6 Sep 2013 16:15:34 +0000
Subject: [PATCH] Reuse method from "MathArrays". Merged "if" cases.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1520622 13f79535-47bb-0310-9956-ffa450edef68
---
 .../org/apache/commons/math3/util/Combinations.java | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/src/main/java/org/apache/commons/math3/util/Combinations.java b/src/main/java/org/apache/commons/math3/util/Combinations.java
index a93c01117..e590a7167 100644
--- a/src/main/java/org/apache/commons/math3/util/Combinations.java
+++ b/src/main/java/org/apache/commons/math3/util/Combinations.java
@@ -131,16 +131,9 @@ public class Combinations implements Iterable<int[]> {
     /** {@inheritDoc} */
     @Override
     public Iterator<int[]> iterator() {
-        if (k == 0) {
-            return new SingletonIterator(new int[]{});
-        }
-        if (k == n) {
-            // TODO: once getNatural is extracted from RandomDataGenerator, use it
-            final int[] natural = new int[n];
-            for (int i = 0; i < n; i++) {
-                natural[i] = i;
-            }
-            return new SingletonIterator(natural);
+        if (k == 0 ||
+            k == n) {
+            return new SingletonIterator(MathArrays.natural(k));
         }
 
         switch (iterationOrder) {