Turing Backend Module 1: Lesson Link

Before starting this tutorial, you should be comfortable with:

• the topics covered in Ruby in 100 Minutes
• installing a gem
• using IRB (or pry)
• writing methods

After completing this tutorial, you will be able to:

• manipulate file input and output
• read content from a CSV (Comma Separated Value) file
• transform it into a standardized format
• manipulate strings

For this project, two data files have been saved to the data directory:

• event_attendees.csv: small sample data file (~20 lines)
• full_event_attendees.csv: large sample data file (5,000+ lines)

• Read the File Contents
• Read the File Line By Line
• Display the First Name of All Attendees
• Skipping the Header Row
• Look for a Solution before Building a Solution

• Switching over to use the CSV Library
• Accessing Columns by their Names
• Displaying the Zip Codes of All Attendees

• Pseudocode for Cleaning Zip Codes
• Handling Bad and Good Zip Codes
• Handling Missing Zip Codes
• Moving Clean Zip Codes to a Method
• Refactoring Clean Zip Codes