Ruby Adventures

A collection of exercises and mini projects built while learning Ruby fundamentals. Each file explores a different concept from basic syntax to object-oriented programming.

Projects

• calculator.rb - CLI calculator using lambda functions
• bmi_calculator.rb - BMI calculator with category ranges
• company_email_generator.rb - Generates work emails from name and company input
• exam_letter_grading.rb - Converts grade points to letter grades using case statements
• fibonacci_numbers.rb - Prints Fibonacci sequence up to a given number
• letter_frequency.rb - Counts letter frequency in a given text
• palindrome_checker.rb - Checks if a word is a palindrome — includes both easy and recursive solutions
• search_in_file.rb - Searches for a keyword across .txt files in the current directory
• cryptocurrency_converter.rb - CLI app to convert BTC, ETH, XRP, DASH and LTC to USD or EUR
• simple_note_app.rb - CLI note-taking app with add, edit, delete and persistent storage

💱 Cryptocurrency Converter - Ruby CLI app to convert crypto to USD or EUR using live prices

📝 Simple Note App - Ruby CLI note-taking app with persistent storage

Concepts Covered

• Variables, strings, arrays, hashes
• Conditionals, loops, case statements
• Methods, lambdas, blocks, yield
• Object-oriented programming — classes, inheritance, encapsulation, polymorphism
• Modules — include, extend, prepend
• File and directory manipulation
• Exception handling
• Recursion

Tech Stack

• Ruby 2.7+

Full project on GitHub

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