Outline:

1. Quiz 5
2. Recap: handling lambda
   • closures
   • exercises from last time
3. Wrap-up

What’s next

Upcoming events/assessments:

• Exam Day #2 is next Friday
• Interpreter Part 3 (tokenizer) cannot be resubmitted after tonight at 10pm
• Interpreter Parts 4–6 are available for you to work on (aim to finish these by M/W/F next week, if not earlier)
  • Part 4: Parser
  • Part 5: Evaluating if/let/quote
  • Part 6: Evaluating define/lambda

What you should do now:

• Read the assigned readings (see below)
• Finish Interpreter Part 4: Parser
• Work on Interpreter Part 5: Evaluating if/let/quote and Interpreter Part 6: Evaluating define/lambda

Reading assignment (to be completed by the next class):

Lambda and closures (from today):

• Closures

For next time:

• Tail calls – stop at “Tail recursion modulo cons”