Learning Module 5 — Interpreters and Functions

Why this is important: This module teaches you how closures work. Understanding this not only helps you write an interpreter that can handle functions, but also helps you understand how to use closures properly in languages that support them (which is nearly all of them these days).

Outcomes

• 5.1 – Give the proper eval code to create a closure from a function expression. (3 points)
• 5.2 – Give the proper eval code to implement a function (closure) call. (3 points)
• 5.3 – Explain why we need to maintain a separate environment for a closure. (MC) (2 point)
• 5.4 – Explain the difference between a procedure and a function. (MC) (2 point)