sir-ragna · September 28, 2015 20:47 · Sep 28, 2015
diff --git a/wrap.js b/wrap.js
@@ -0,0 +1,37 @@
+/* A function that give the first argument to the callback function */
+function wrapper(func) {
+  return function(arg1, callback) {
+    func(arg1, function() {
+      callback(arg1);
+    }); 
+  };  
+}
+
+function bar(arg1) {
+    console.log("Bar: " + arg1);
+};
+function foo(arg1, callback) {
+    console.log("Foo: " + arg1);
+    callback();
+};
+
+// Test the wrapper
+var fooImproved = wrapper(foo);
+fooImproved("Hello", bar);
+
+/* Now lets add logging for all arguments */
+function addArgLogging(func) {
+  return function() {
+    for(var i = 0; i < arguments.length; i++) {
+      // If your arguments contains more then strings
+      // Say functions then you should add a check for that
+      // here
+      console.info("ARG " + i + ": " + arguments[i]); 
+    }   
+    func.apply(this, arguments)
+  };  
+}
+
+// Test the Arg logger
+var barLogged = addArgLogging(bar);
+barLogged("Test", "Hello", "World", "Hey!");