University of Arizona, Department of Computer Science

CSc 120: List Comprehensions 04

Expected Behavior

Write a Python function first_matches_last(L) that takes as arguments a list of strings L and returns a list consisting of those elements of L whose first and last characters are the same.

Your solution should use list comprehensions only. It should not use any other control statements—i.e., no if, for, while, or try statements, except as needed within the list comprehension.

Examples

  1. Call: first_matches_last(["that", "takes", "as", "arguments", "a", "list", "of", "strings", "L"])
    Result: ["that", "a", "strings", "L"]

  2. Call: first_matches_last([])
    Result: []