some test

Student.js

@@ -1,12 +1,27 @@
-module.exports = function(name,age,sex){
+//Constructor
+function Student(name,age,sex){
     this.name = name;
     this.age = age;
     this.sex = sex;
-    this.study = function(){
-        console.log(this.name + ' is busy on study.');
-    }
+    // this.study = function(){
+    //     console.log(this.name + ' is busy on study.');
+    // }
 }
 
-module.exports.desc = function(){
+//Instance method
+Student.prototype.study = function() {
+    console.log(this.name + ' is busy on study.');
+};
+
+//Static method
+Student.desc = function() {
     return 'this is a Student Class';
-}
+};
+
+
+module.exports = Student;
+// module.exports.desc = function(){
+//     return 'this is a Student Class';
+// }
+
+

func.js

@@ -0,0 +1,17 @@
+var foo = function(){
+    this.value = 100;
+};
+
+foo.prototype.showVal = function(){
+    console.log(this.value);
+}
+
+
+
+console.log(new foo().value);
+
+console.log(global.value);
+foo();
+console.log(global.value);
+
+new foo().showVal();

js_async_test.js

@@ -0,0 +1,28 @@
+var fs = require('fs')
+
+//show nodejs async attr
+fs.readFile('js_async_test.txt','utf8',function(err,data){
+    if(!err && data){
+        console.log('read done 1');
+    }
+});
+
+fs.readFile('js_async_test.txt','utf8',function(err,data){
+    if(!err && data){
+        console.log('read done 2');
+    }
+});
+
+fs.readFile('js_async_test.txt','utf8',function(err,data){
+    if(!err && data){
+        console.log('read done 3');
+    }
+});
+
+fs.readFile('js_async_test.txt','utf8',function(err,data){
+    if(!err && data){
+        console.log('read done 4');
+    }
+});
+
+console.log('end...');