Question 2: Higher Order Functions

Use Ok to test your knowledge with the following "What Would Python Display?" questions:

$ python ok -q hof -u

>>> def even(f):
...     def odd(x):
...         if x < 0:
...             return f(-x)
...         return f(x)
...     return odd
>>> steven = lambda x: x
>>> stewart = even(steven)
>>> stewart
______

>>> stewart(61)
______

>>> stewart(-4)
______

>>> def cake():
...    print('beets')
...    def pie():
...        print('sweets')
...        return 'cake'
...    return pie
>>> chocolate = cake()
______

>>> chocolate
______

>>> chocolate()
______

>>> more_chocolate, more_cake = chocolate(), cake
______

>>> more_chocolate
______

>>> def snake(x, y):
...    if cake == more_cake:
...        return chocolate
...    else:
...        return x + y
>>> snake(10, 20)
______

>>> snake(10, 20)()
______

>>> cake = 'cake'
>>> snake(10, 20)
______