add NFE

6.4NFE/t.js

@@ -0,0 +1,44 @@
+function sayHi(){
+    console.log("Hi");
+
+    sayHi.counter++;
+}
+
+console.log(sayHi.name)
+
+let user = {
+    sayHi(){
+
+    },
+
+    sayBye: function (){
+
+    }
+}
+
+console.log(user.sayBye.name)
+console.log(user.sayHi.name)
+
+function ask(question, ...handlers){
+    let isYes = confirm(question);
+
+    for(let handler of handlers){
+        if (handler.length == 0){
+            if (isYes) handler();
+        }else{
+            handler(isYes);
+        }
+    }
+}
+
+ask("Question?", () => console.log('You said yes'), result => console.log(result))
+
+console.log("the difference between the counter.count and closure is the counter.count can be accessed outside but closure cannot");
+
+let sayHi = function func(who){
+    console.log(`Hello, ${who}`);
+};
+
+sayHi("John");
+
+