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Chapter 2. Strings
Chapter 3. Numbers
Chapter 4. Data Structures
- Using associative arrays
Chapter 5. Good Coding Practices
Chapter 6. Files and I/O
Chapter 7. Dates and Times
Chapter 8. Data and Text Processing
- Manipulating files with CLI one-liners
- Editing files in-place with CLI one-liners
Chapter 9. Testing and Debugging
Chapter 10. Data Formats and Serialization
Chapter 11. HTML and the Web

Chapter 2. Strings
Chapter 3. Numbers
Chapter 4. Data Structures
- Using associative arrays
Chapter 5. Good Coding Practices
Chapter 6. Files and I/O
Chapter 7. Dates and Times
Chapter 8. Data and Text Processing
- Manipulating files with CLI one-liners
- Editing files in-place with CLI one-liners
Chapter 9. Testing and Debugging
Chapter 10. Data Formats and Serialization
Chapter 11. HTML and the Web

Chapter 8. Data and Text Processing

Ruby Chapter 8.
Data and Text Processing

Manipulating files with CLI one-liners

Ruby, with its expressive syntax, allows for succinct and readable one-liners that can handle a variety of file operations.

Ruby provides a straightforward way to edit files in-place right from the command line.