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# 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: - 1, 2, 3, 4, 5 And the operation: - square a number (`x => x * x`) Your code should be able to produce the collection of squares: - 1, 4, 9, 16, 25 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. * * * * For installation and learning resources, refer to the [exercism Racket page](http://exercism.io/languages/racket). You can run the provided tests through DrRacket, or via the command line. To run the test through DrRacket, simply open the test file and click the 'Run' button in the upper right. To run the test from the command line, run the test from the exercise directory with the following command: ``` raco test accumulate-test.rkt ``` which will display the following: ``` raco test: (submod "accumulate-test.rkt" test) 2 success(es) 0 failure(s) 0 error(s) 2 test(s) run 0 2 tests passed ``` ## Source Conversation with James Edward Gray II [https://twitter.com/jeg2](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.
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78 entries across 78 versions & 1 rubygems