Flatten Array in C#
Take a nested list and return a single list with all values except nil/null
exercism fetch csharp 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.
Interview Question https://reference.wolfram.com/language/ref/Flatten.html
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