From 71dae7b71ea5b7b37c72a8c6c4bdc10ab03cf952 Mon Sep 17 00:00:00 2001
From: Tom Payne <twpayne@gmail.com>
Date: Sun, 23 Mar 2014 19:44:30 +0100
Subject: [PATCH] Add ol.array.safeExtend

---
 src/ol/array.js | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/src/ol/array.js b/src/ol/array.js
index 882a501262..9e4ffc1da2 100644
--- a/src/ol/array.js
+++ b/src/ol/array.js
@@ -37,6 +37,25 @@ ol.array.binaryFindNearest = function(arr, target) {
 };
 
 
+/**
+ * Safe version of goog.array.extend that does not risk to overflow the stack
+ * even if `array2` contains a large number of elements.
+ *
+ * @param {Array.<T>} array1 Array 1.
+ * @param {Array.<T>} array2 Array 2.
+ * @template T
+ */
+ol.array.safeExtend = function(array1, array2) {
+  // goog.array.extend uses Array.prototype.push.apply, which can overflow the
+  // stack if array2 contains too many elements.  Repeatedly calling push
+  // performs as well on modern browsers.
+  var i, ii;
+  for (i = 0, ii = array2.length; i < ii; ++i) {
+    array1.push(array2[i]);
+  }
+};
+
+
 /**
  * @param {Array.<number>} arr Array.
  * @param {number} target Target.