NameVirtualHost Directive is gone

With Apache httpd-2.4, NameVirtualHost Directive is deprecated. If we happen to bring over httpd.conf from old version to newer httpd-2.4 and have NameVirtualHost *:80 then we will find this warning. We can simply remove NameVirtualHost directive in this case.

Usually, we use virtual hosts (vhosts). With this effect, if … Continue reading

Polymorphism in Java

Github UPDATE: You can now clone or download BlueJ project from github. https://github.com/victorskl/demo-java Polymorphism in OOP Polymorphism is kind of powerful concept in Object-oriented programming. The following are quick overview. simply means many forms object variable reference polymorphic value, i.e. referencing many underlying concept is computer memory storage i.e. how … Continue reading