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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. Lisp specific: it's perfectly fine to use `MAPCAR` or the equivalent, as this is idiomatic Lisp, not a library function. ## Elm Installation Refer to the [Exercism help page](http://exercism.io/languages/elm) for Elm installation and learning resources. ## Writing the Code The first time you start an exercise, you'll need to ensure you have the appropriate dependencies installed. ```bash $ npm install ``` Execute the tests with: ```bash $ npm test ``` Automatically run tests again when you save changes: ```bash $ npm run watch ``` As you work your way through the test suite, be sure to remove the `skip <|` calls from each test until you get them all passing! ## 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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102 entries across 102 versions & 1 rubygems