1 files changed, 18 insertions, 0 deletions
diff --git a/js.2/utils.js b/js.2/utils.js
new file mode 100644
index 0000000..859296c
--- /dev/null
+++ b/js.2/utils.js
@@ -0,0 +1,18 @@
+
+NES.Utils = {
+    arraycopy: function(src, srcPos, dest, destPos, length) {
+        for (var i=0; i<length; ++i) {
+            dest[destPos+i] = src[srcPos+i];
+        }
+    },
+    
+    // http://www.sitepoint.com/blogs/2006/01/17/javascript-inheritance/
+    copyPrototype: function(descendant, parent) {
+        var sConstructor = parent.toString();
+        var aMatch = sConstructor.match( /\s*function (.*)\(/ );
+        if ( aMatch != null ) { descendant.prototype[aMatch[1]] = parent; }
+        for (var m in parent.prototype) {
+            descendant.prototype[m] = parent.prototype[m];
+        }
+    }
+}