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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

There are two different methods of getting set up to run the tests with Objective-C:

- Create an Xcode project with a test target which will run the tests.
- Use the ruby gem `objc` as a test runner utility.

Both are described in more detail here: http://exercism.io/languages/objective-c


### Submitting Exercises

When submitting an exercise, make sure your solution file is in the same directory as the test code.

For example, if you're submitting `Bob.m` for the Bob exercise, the submit command would be something like `exercism submit <path_to_exercism_dir>/objective-c/bob/Bob.m`.

## 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.

Version data entries

99 entries across 99 versions & 1 rubygems

Version Path
trackler-2.2.1.103 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.102 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.101 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.100 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.99 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.98 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.97 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.96 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.95 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.94 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.93 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.92 tracks/objective-c/exercises/flatten-array/README.md
trackler-2.2.1.91 tracks/objective-c/exercises/flatten-array/README.md
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trackler-2.2.1.84 tracks/objective-c/exercises/flatten-array/README.md