Flatten

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Last edited Dec 15, 2017

Created on Dec 14, 2017

This example demonstrates how a recursive array-flattening function reduces nested arrays of varying depth into a single flat sequence. The code defines a `flatten` function using `Array.reduce` and `Array.concat`, testing it against three increasingly nested inputs—`basic`, `medium`, and `hardCore`—and verifying each result equals `[1,2,3,4,5,6]` with Node’s `assert.deepEqual`. It shows the algorithm’s ability to handle arbitrarily deep nesting by recursively invoking itself on sub-arrays, producing the same output regardless of input complexity. No visualization libraries are used; the example is pure JavaScript logic executed in a runtime environment.

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