New way of checking if value is integer

functions/var/is_int.js

@@ -5,6 +5,7 @@ function is_int (mixed_var) {
     // +    revised by: Matt Bradley
     // +   bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
     // +   improved by: WebDevHobo (http://webdevhobo.blogspot.com/)
+    // +   improved by: Rafał Kukawski (http://blog.kukawski.pl)
     // %        note 1: 1.0 is simplified to 1 before it can be accessed by the function, this makes
     // %        note 1: it different from the PHP implementation. We can't fix this unfortunately.
     // *     example 1: is_int(23)
@@ -15,9 +16,5 @@ function is_int (mixed_var) {
     // *     returns 3: false
     // *     example 4: is_int(true)
     // *     returns 4: false
-    if (typeof mixed_var !== 'number') {
-        return false;
-    }
-
-    return !(mixed_var % 1);
+    return mixed_var === ~~mixed_var;
 }