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exercism fetch scala flatten-array

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]

Do not use scala built-in flatten function.

Submitting Exercises

Note that, when trying to submit an exercise, make sure the solution is in the exercism/scala/<exerciseName> directory.

For example, if you're submitting FlattenArray.scala for the Bob exercise, the submit command would be something like exercism submit <path_to_exercism_dir>/src/main/scala/FlattenArray.scala.

For more detailed information about running tests, code style and linting, please see the help page.

Source

Interview Question 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.