"""
Using Python's built-in Higher-Order Functions (HOFs): map

Dan Armendariz
danallan@cs.harvard.edu
"""

# create an arbitrary list of numbers
nums = [1, 5, 10, 8, -4, 432]

print "Initial:", nums

def incrementor(num):
    """ Increment a number by 1 """
    return num + 1

def doubler(num):
    """ Double a number """
    return num * 2

# the `map` function is a HOF that applies a function to an entire list
print "Add 1:  ", map(incrementor, nums)
print "Double: ", map(doubler, nums)