Discover how to efficiently read and write data in R using various file formats including CSV, Excel, and text files with built-in functions and additional packages such as 'readr' and 'readxl', and learn to adapt this knowledge for practical application in your own R programs. Effective data import and export are crucial skills for any R programmer to master.

Mastering Yii Framework: Building Scalable Web Applications - Authentication and Authorization Learn how to use Yii's built-in Role-Based Access Control (RBAC) system to manage user permissions and secure your web application. This topic covers the basics of RBAC, configuring the system, creating roles and permissions, assigning roles to users, and checking permissions.

Get started with Ruby programming by installing Ruby on your computer and creating your first script. Learn how to use RubyInstaller, RVM, or rbenv to get Ruby up and running, and write a simple Ruby script using a text editor. Master the basics of running Ruby scripts and setting yourself up for more advanced techniques.