When programming in JAVA often developer see java.lang.NullPointerException. There are reasons as to why this Exception is thrown. So it is best to understand how to fix this exception before the application is deployed in production.

To capitalize only first letter of a string in Swift iOS. Below is the code for both Swift 3 and Swift 4.                   

In PHP, to access session variable stored in $_SESSION array the page must have session_start() method invoked earlier, but when it is called multiple called, it throws PHP Notice "session already started".

File upload is trivial to any web application. Prior to Java Servlet specification 3.0 upload to server required Apache Commons. Now its just a matter of writing a just any other file.

Enhance your user's reading experience on your website by highlighting only the portion of text user selected. Fokus is a simple script that do this simple job in less than 3KB of code.