tracks/javascript/exercises/perfect-numbers/README.md in trackler-2.2.1.94 vs tracks/javascript/exercises/perfect-numbers/README.md in trackler-2.2.1.95

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@@ -3,43 +3,46 @@ Determine if a number is perfect, abundant, or deficient based on Nicomachus' (60 - 120 CE) classification scheme for natural numbers. The Greek mathematician [Nicomachus](https://en.wikipedia.org/wiki/Nicomachus) devised a classification scheme for natural numbers, identifying each as belonging uniquely to the categories of **perfect**, **abundant**, or **deficient** based on their [aliquot sum](https://en.wikipedia.org/wiki/Aliquot_sum). The aliquot sum is defined as the sum of the factors of a number not including the number itself. For example, the aliquot sum of 15 is (1 + 3 + 5) = 9 -- **Perfect**: aliquot sum = number +- **Perfect**: aliquot sum = number - 6 is a perfect number because (1 + 2 + 3) = 6 - 28 is a perfect number because (1 + 2 + 4 + 7 + 14) = 28 - **Abundant**: aliquot sum > number - 12 is an abundant number because (1 + 2 + 3 + 4 + 6) = 16 - 24 is an abundant number because (1 + 2 + 3 + 4 + 6 + 8 + 12) = 36 - **Deficient**: aliquot sum < number - 8 is a deficient number because (1 + 2 + 4) = 7 - Prime numbers are deficient - + Implement a way to determine whether a given number is **perfect**. Depending on your language track, you may also need to implement a way to determine whether a given number is **abundant** or **deficient**. ## Setup -Go through the setup instructions for JavaScript to -install the necessary dependencies: +Go through the setup instructions for JavaScript to install the + necessary dependencies: http://exercism.io/languages/javascript/installation -## Making the Test Suite Pass +## Running the test suite -Execute the tests with: +The provided test suite uses [Jasmine](https://jasmine.github.io/). +You can install it by opening a terminal window and running the +following command: - jasmine <exercise-name>.spec.js +```sh +npm install -g jasmine +``` -Replace `<exercise-name>` with the name of the current exercise. E.g., to -test the Hello World exercise: +Run the test suite from the exercise directory with: - jasmine hello-world.spec.js +```sh +jasmine perfect-numbers.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`. +In many test suites all but the first test have been marked "pending". +Once you get a test passing, activate the next one by changing `xit` to `it`. ## Source Taken from Chapter 2 of Functional Thinking by Neal Ford. [http://shop.oreilly.com/product/0636920029687.do](http://shop.oreilly.com/product/0636920029687.do)