Accumulate

Instructions

Implement the accumulate operation, which, given a collection and an operation to perform on each element of the collection, returns a new collection containing the result of applying that operation to each element of the input collection.

Given the collection of strings:

• "cat", "Dog", "b4t", "gO"

And the operation:

• upcase a string

Your code should be able to produce the collection of strings:

• "CAT", "DOG", "B4T, "GO"

Check out the test suite to see the expected function signature.

Restrictions

Keep your hands off that collect/map/fmap/whatchamacallit functionality provided by your standard library! Solve this one yourself using other basic tools instead.

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Source

Conversation with James Edward Gray II