cs2370 Notes: 14 Mutation

Design:

• Add one to each item in a list.
• Add one to each item in a list, in place.
  • for ii in range(len(xs)):

Distraction:

• Let’s make a grid of colored cells.

Concepts:

• Mutation
• Mutability
  • List are, tuples aren’t.
• Pass by value vs. reference
  • Unexpected mutation
• Nested mutation
• Reassignment