Course of Raku

Part 3. Objects, I/O, and exceptions

Object-oriented programming with classes and roles, reading and writing input and output and talking to external programs, and handling errors with exceptions.

Classes and objects

• Classes — 2 exercises
  • Type objects and instances — 1 quiz
• Attributes — 4 exercises
  • Read-write attributes
  • Default values — 1 quiz
• Methods — 4 exercises
  • Private attributes
  • Methods with parameters
  • Methods calling methods — 1 quiz
• Class methods — 1 quiz and 2 exercises
• Subroutines vs methods — 1 quiz and 2 exercises
• Inheritance — 3 exercises
  • Overriding methods — 1 quiz
• Roles — 3 exercises
  • Composing several roles
  • Adding a role to an object — 1 quiz
• Introspecting objects — 2 exercises
  • The inheritance chain — 1 quiz
• The metaobject protocol 🆕 — 4 exercises
  • Meta-methods — 1 quiz
  • Adding methods at runtime

Input and output

• Standard streams — 1 quiz and 3 exercises
• Working with files — 3 exercises
  • Appending to a file — 1 quiz
• Working with directories — 3 exercises
  • Listing a directory — 1 quiz
• Deleting files and directories — 1 quiz and 2 exercises
• File handles — 1 quiz and 4 exercises
• Running external programs 🆕 — 4 exercises
  • run and shell — 1 quiz
  • Capturing output
  • The Proc object — 1 quiz
  • The environment — 1 quiz

Exceptions

• Catching exceptions with try — 1 quiz and 3 exercises
  • Not every error is immediate
• The CATCH phaser — 1 quiz and 3 exercises
• Exception objects — 1 quiz and 3 exercises
• Soft failures — 1 quiz and 3 exercises
• Custom exceptions — 1 quiz and 3 exercises