42 lines
1.2 KiB
Markdown
42 lines
1.2 KiB
Markdown
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# Flatten Array
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Take a nested list and return a single flattened list with all values except nil/null.
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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.
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For Example
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input: [1,[2,3,null,4],[null],5]
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output: [1,2,3,4,5]
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* * * *
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For installation and learning resources, refer to the
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[exercism help page](http://exercism.io/languages/ruby).
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For running the tests provided, you will need the Minitest gem. Open a
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terminal window and run the following command to install minitest:
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gem install minitest
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If you would like color output, you can `require 'minitest/pride'` in
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the test file, or note the alternative instruction, below, for running
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the test file.
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Run the tests from the exercise directory using the following command:
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ruby flatten_array_test.rb
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To include color from the command line:
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ruby -r minitest/pride flatten_array_test.rb
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## Source
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Interview Question [https://reference.wolfram.com/language/ref/Flatten.html](https://reference.wolfram.com/language/ref/Flatten.html)
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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