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Python Functional Python Functional Workhorses Map

Benjamin Cha
Benjamin Cha
2,761 Points
Posted by Benjamin Cha
Benjamin Cha
2,761 Points

How to use the forwards function?

I can't fix the forwards function, even though I know how to do it backwards. How do I do this? Can somebody help me?

Ben

maps.py 
backwards = [
    'tac',
    'esuoheerT',
    'htenneK',
    [5, 4, 3, 2, 1],
]

def reverse(iterableitem):
    revitem = [] 
    for item in iterableitem[::-1]:
        revitem.append(item)

    return revitem

forwards = map(reverse, backwards)

1 Answer

Rohald van Merode
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Rohald van Merode
Treehouse Staff
Rohald van Merode
.a{fill-rule:evenodd;}techdegree
Rohald van Merode
Treehouse Staff

Hey Benjamin Cha 👋

You're very close here! Currently, your reverse function always returns a list, even when the provided value was a string. To fix this you can simply return your iterableitem[::-1]. This will reverse the provided value and return the same type of value as provided initially 🙂

def reverse(thing):
    return thing[::-1]

forwards = map(reverse, backwards)

Hope this helps!