Ruby File Processing: Calculating Averages from Text Data

Working with external data is a fundamental skill for any developer, yet transition from basic syntax to file interaction can feel challenging. This text-based course guides you through the process of reading raw text files, extracting relevant scores, and performing calculations. You will start with the core concepts of file input and output, learn how to handle missing or malformed data, and write clean Ruby code to compute averages. What you'll learn: Understand how to safely open, read, and close files in Ruby; Parse raw string data into usable numerical values using modern string manipulation; Implement robust error handling for missing files or empty lines; Calculate averages and other basic statistics from dynamic datasets; Apply clean coding practices, including Ruby's block syntax and basic testing principles. You will begin with foundational file-handling concepts before moving on to practical step-by-step parsing exercises that build your confidence. This course is designed for beginner Ruby programmers who want to move beyond basic variables and start working with real-world data files. Start reading today to master file processing in Ruby.