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# Flatten Array
Take a nested list and return a single flattened list with all values except nil/null.
The challenge is to write a function that accepts an arbitrarily-deep nested list-like structure and returns a flattened structure without any nil/null values.
For Example
input: [1,[2,3,null,4],[null],5]
output: [1,2,3,4,5]
## 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:
jasmine <exercise-name>.spec.js
Replace `<exercise-name>` with the name of the current exercise. E.g., to
test the Hello World exercise:
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
Interview Question [https://reference.wolfram.com/language/ref/Flatten.html](https://reference.wolfram.com/language/ref/Flatten.html)
## 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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