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Contents

# 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]


* * * *

To run the code in this exercise, you will only need to have [CommandBox CLI installed](https://ortus.gitbooks.io/commandbox-documentation/content/setup/installation.html).  This binary runs CFML code from the command line.

To run the tests, `cd` into the exercise folder and run the following:

```bash 
box task run TestRunner
# Or start up a test watcher that will rerun when files change
box task run TestRunner --:watcher
```

The tests leverage a library called TestBox which supports xUnit and BDD style of testing.  All test suites will be written in the [BDD style](https://testbox.ortusbooks.com/content/primers/bdd/specs.html) which uses closures to define test specs.  You won't need to worry about installing TestBox.  The CLI test runner will take care of that for you.  You just need to be connected to the internet the first time you run it.  You can read more about it here:

[https://testbox.ortusbooks.com/content/](https://testbox.ortusbooks.com/content/)
## 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

59 entries across 59 versions & 1 rubygems

Version Path
trackler-2.2.1.104 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.103 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.102 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.101 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.100 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.99 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.98 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.97 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.96 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.95 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.94 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.93 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.92 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.91 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.90 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.89 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.88 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.87 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.86 tracks/cfml/exercises/flatten-array/README.md
trackler-2.2.1.85 tracks/cfml/exercises/flatten-array/README.md