Added newer function from v3 merge.

Author: photonstorm

v3/src/utils/array/NumberArray.js

@@ -1,24 +1,46 @@
 /**
-* Create an array representing the inclusive range of numbers (usually integers) in `[start, end]`.
+* Create an array representing the range of numbers (usually integers), between, and inclusive of,
+* the given `start` and `end` arguments. For example:
+*
+* `var array = numberArray(2, 4); // array = [2, 3, 4]`
+* `var array = numberArray(0, 9); // array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]`
+* 
 * This is equivalent to `numberArrayStep(start, end, 1)`.
+* 
+* You can optionally provide a prefix and / or suffix string. If given the array will contain
+* strings, not integers. For example:
+* 
+* `var array = numberArray(1, 4, 'Level '); // array = ["Level 1", "Level 2", "Level 3", "Level 4"]`
+* `var array = numberArray(5, 7, 'HD-', '.png'); // array = ["HD-5.png", "HD-6.png", "HD-7.png"]`
 *
 * @method Phaser.ArrayUtils#numberArray
 * @param {number} start - The minimum value the array starts with.
 * @param {number} end - The maximum value the array contains.
-* @return {number[]} The array of number values.
+* @param {string} [prefix] - Optional prefix to place before the number. If provided the array will contain strings, not integers.
+* @param {string} [suffix] - Optional suffix to place after the number. If provided the array will contain strings, not integers.
+* @return {number[]|string[]} The array of number values, or strings if a prefix or suffix was provided.
 */
-var NumberArray = function (start, end)
+var NumberArray = function (start, end, prefix, suffix)
 {
-    if (start > end)
-    {
-        return;
-    }
-
     var result = [];
 
     for (var i = start; i <= end; i++)
     {
-        result.push(i);
+        if (prefix || suffix)
+        {
+            var key = (prefix) ? prefix + i.toString() : i.toString();
+
+            if (suffix)
+            {
+                key = key.concat(suffix);
+            }
+
+            result.push(key);
+        }
+        else
+        {
+            result.push(i);
+        }
     }
 
     return result;