Skip to main content

About me

I moved to write on my own hosted blog at nguyenvanhuong.vn. Visit the website for new posts.

I am a software developer living in Vietnam. I started my career at Axon Active Vietnam, where I learned the fundamentals of building web enterprise systems with Java. After nearly five years of working with the low-code platform Axon.ivy, I decided to change my path and joined ubitec. There, I began working with Python to build an AI chatbot using Rasa. However, my company then rotated me to another team to build a chat platform using the open-source project Rocket.Chat, turning me into a full-time JavaScript developer for nearly another five years.

After spending several years in software development, I had the opportunity to gain valuable experience in various aspects of the field. It became clear to me that engineering management tasks often presented challenges that needed to be overcome. With this in mind, I aspired to become an active participant and concentrate on resolving any issues within my company's software development processes, particularly those related to engineering management.

The name of my blog, "vhandit", is short for "Van Huong and IT". 

Follow me on

Comments

  1. UnknownApril 4, 2016 at 7:33 AM

    Bạn có thể add subscribe option trong website này để mình nhận được tin nhắn, email khi bạn post bài viết mới được không.

    Cám ơn bạn nhiều.

    Tuyền

    ReplyDelete
    Replies
    1. Huong NguyenApril 5, 2016 at 7:39 AM

      Cảm ơn ý kiến của @Tuyen Nguyen nhé. Tôi đã thêm gadget "Follow by Email" vào site. Ngoài ra bạn cũng có thể dùng http://feedly.com/. ;)

      Delete
  2. Thach LeDecember 4, 2016 at 3:04 AM

    A cài plug in hiển thị code cho dễ đọc vs a

    ReplyDelete
    Replies
    1. Huong NguyenDecember 4, 2016 at 6:51 AM

      Thank bạn nhé! Hazz...blog đang sử dụng Syntaxhighlighter, có thể bị vấn đề ở một số browser rồi, tôi kiểm tra lại xem sao. :(

      Delete
    2. Thach LeDecember 5, 2016 at 8:41 AM

      xem được rồi, mới xem profile linkedin thì ra là bằng tuổi -.-

      Delete
  3. Thach LeDecember 4, 2016 at 3:05 AM

    em cũng mới tập viết blog: thachleblog.com. Nếu được a ghé đọc góp ý với :D

    ReplyDelete
  4. UnknownFebruary 10, 2017 at 2:25 PM

    bạn có thể viết thêm các bài review về các framework hay công nghệ mới của java không , JSF mình thấy ít cty dùng lằm mặc dù nó là con đẻ của JAVA

    ReplyDelete

Post a Comment

Popular posts from this blog

Junit - Test fails on French or German string assertion

In my previous post about building a regex to check a text without special characters but allow German and French . I met a problem that the unit test works fine on my machine using Eclipse, but it was fail when running on Jenkins' build job. Here is my test: @Test public void shouldAllowFrenchAndGermanCharacters(){ String source = "ÄäÖöÜüß áÁàÀâÂéÉèÈêÊîÎçÇ"; assertFalse(SpecialCharactersUtils.isExistSpecialCharater(source)); } Production code: public static boolean isExistNotAllowedCharacters(String source){ Pattern regex = Pattern.compile("^[a-zA-Z_0-9_ÄäÖöÜüß áÁàÀâÂéÉèÈêÊîÎçÇ]*$"); Matcher matcher = regex.matcher(source); return !matcher.matches(); } The result likes the following: Failed tests: SpecialCharactersUtilsTest.shouldAllowFrenchAndGermanCharacters:32 null A guy from stackoverflow.com says: "This is probably due to the default encoding used for your Java source files. The ö in the string literal in the J...
5 comments
Read more

Strategy Design Pattern

For example, I have a program with an Animal abstract class and two sub-classes Dog and Bird. I want to add new behavior for the class Animal, this is "fly".  Now, I face two approaches to solve this issue: 1. Adding an abstract method "fly" into the class Animal. Then, I force the sub-classes should be implemented this method, something like: public abstract class Animal{ //bla bla public abstract void fly(); } public class Bird extends Animal{ //bla bla public void fly(){ System.out.println("Fly high"); } } public class Dog extends Animal{ //bla bla public void fly(){ System.out.println("Cant fly"); } } 2. Creating an interface with method "fly" inside. The same issue to an abstract class, I force the classes these implement this interface should have a method "fly" inside: public interface Flyable{ public void fly(); } public class Bird implements Flyable{ //bla bla public void fly(){ System.out.pr...
Post a Comment
Read more

What the heck is Meteor DDP?

I was using Meteor for my messenger project. I was so curious about the real time connection. I wanted to know how exactly this mechanism works. In this post, I will go through the DDP Specification, an overview of WebSocket, and a simple demo about how to subscribe a publication of Rocket.Chat (containing a DDP server) from an external webpage. At a glance, I knew that Meteor invented a protocol called DDP which uses for handling real time connection. So then, what is DDP? "DDP (Distributed Data Protocol) is the stateful WebSocket protocol that Meteor uses to communicate between the client and the server." [1] All right! Why does DDP matter? "DDP is a standard way to solve the biggest problem facing client-side JavaScript developers: querying a server-side database, sending the results down to the client, and then pushing changes to the client whenever anything changes in the database" . [2] In order to understand deeply the protocol, I decided ...
Post a Comment
Read more

Multiple Inheritance of State and Implementation

Today, I was just curious about why an enum can not extend anything else. I took a look on the Oracle document here , and I found the answer is below: "All enums implicitly extend java.lang.Enum. Because a class can only extend one parent (see Declaring Classes), the Java language does not support multiple inheritance of state (see Multiple Inheritance of State, Implementation, and Type), and therefore an enum cannot extend anything else." I have been learned of it before. But, wait a sec...! Why Java does not support multiple inheritance of state? Since I have worked with other programming languages like C++, I was able to make a class extend some other classes. The short answer is to avoid the issues of multiple inheritance of state .  I wonder if other programming languages have these below terms but Java does. Multiple inheritance of state It is the ability to inherit fields from multiple classes. There is a problem and Java avoids it. "For exa...
Post a Comment
Read more

Why Functional Programming Matter

What issues do we concern when implementing and maintaining systems? One of the most concern is debugging during maintenance: "this code crashed because it observed some unexpected value." Then, it turns out that the ideas of  no side effects  and  immutability , which functional programming promotes, can help. Shared mutable data is the root cause Shared mutable data are read and updated by more than one of the methods. Share mutable data structures make it harder to track changes in different parts of your program. An immutable object is an object that can't change its state after it's instantiated so it can't be affected by the actions of a function. It would be a dream to maintain because we wouldn't have any bad surprises about some object somewhere that unexpectedly modifies a data structure. A new thinking: Declarative programming There are two ways thinking about implementing a system by writing a program. - Imperative programming: has...
Post a Comment
Read more