Lecture
This lecture discusses the concept of functional decomposition with pattern matching as a solution to accessing heterogeneous data in a class hierarchy. It covers case classes, pattern matching syntax, evaluation of match expressions, forms of patterns, and examples of pattern matching in Scala. The lecture also explores how patterns match constructors, variables, and constants, along with defining evaluation functions using pattern matching. An exercise is provided to write a function using pattern matching to represent expressions as strings, with an optional advanced exercise involving case classes for variables and products. The presentation concludes with examples demonstrating the implementation of pattern matching in Scala.