recursion-practice.py

def isEmpty(lst): return len(lst) == 0

def hd(lst): return lst[0]

def tl(lst): return lst[1:]

# Return the reverse of lst
def reverse(lst): return []

# Find the minimum element of the list
def findMin(lst): return 0

# Concatenate every string in the list together
def concatAll(lst): return ""

# Return the longest string in a list of strings
def longestString(lst): return ""