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exercism fetch javascript accumulate

Accumulate

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 numbers:

And the operation:

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

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.

Lisp specific: it's perfectly fine to use MAPCAR or the equivalent, as this is idiomatic Lisp, not a library function.

Setup

Go through the setup instructions for JavaScript to install the necessary dependencies:

http://exercism.io/languages/javascript

Making the Test Suite Pass

Execute the tests with:

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jasmine <exercise-name>.spec.js

Replace <exercise-name> with the name of the current exercise. E.g., to test the Hello World exercise:

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jasmine hello-world.spec.js

In many test suites all but the first test have been skipped.

Once you get a test passing, you can unskip the next one by changing xit to it.

Source

Conversation with James Edward Gray II https://twitter.com/jeg2

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.