React boilerplate

src.old/js/core/is.js

@@ -0,0 +1,37 @@
+(function(){
+    "use strict";
+    
+    window.core.is = {
+        plainObject: function(obj) {
+            return typeof obj == "object" && obj instanceof Object;
+        },
+
+        aFunction: function (obj) {
+            return typeof obj == "function";
+        },
+
+        string: function (obj) {
+            return typeof obj == "string";
+        },
+
+        regex: function (obj) {
+            return typeof obj == "object" && this.constructedFrom(RegExp);
+        },
+
+        constructedFrom: function (obj, ctor) {
+            return obj instanceof ctor;
+        },
+
+        htmlElement: function(obj) {
+            return obj instanceof HtmlElement;
+        },
+
+        array: function(obj) {
+            return obj instanceof Array;
+        },
+
+        number: function(num) {
+            return typeof num == "number" && !isNaN(num)
+        }
+    };
+})();