Class 14: Flattening Practice

cs1120: Introduction to Computing
Explorations in Language, Logic, and Machine
University of Virginia, Spring 2016

http://xplorecs.org/class14

Class 14:
Lists and Objects
Deep Copies
Flattening

Transcript

1. Class 14: Flattening Practice Introduction to Computing: Explorations in Language, Logic, and Machines cs1120 Spring 2016 David Evans University of Virginia
2. Menu Practice with Lists and Procedures! Orange Belt Promotion Directions will change (added problem) after Friday. Green Belt Promotion Automatic promotion from Project 3 extended to Monday.
4. def list_copy(lst): """Returns a shallow copy of the input lst.""" if not lst: return [] else: return [lst[0]] + list_copy(lst[1:]) p1 = [1, 2, 3] p2 = [p1, list_copy(p1)] p1.append(4) Python Tutor
5. def list_copy(lst): """Returns a shallow copy of the input lst.""" if not lst: return [] else: return [lst[0]] + list_copy(lst[1:]) p1 = [1, 2, 3] p2 = [p1, list_copy(p1)] p1.append(4) Python Tutor
6. Deep Copy
9. Charge Project 3: due Monday If you haven’t earned your Orange Belt yet, requirements will change after Friday!