Implement a function to flatten an array of nested arrays?

Implement a function to flatten an array of nested arrays: 

To flatten an array of nested arrays, we can use a recursive approach where we iterate through the elements of the input array and check if an element is an array or not. If the element is not an array, we add it to the output array. If it is an array, we call the flatten function recursively on that array and concatenate the resulting flattened array to the output array.

Here's an implementation of this approach in JavaScript:

def flatten_array(nested_array):

    """

    Flatten an array of nested arrays.

    Args:

        nested_array (list): A nested array to be

flattened.

    Returns:

        list: The flattened array.

    """

    flattened = []

    for element in nested_array:

        if isinstance(element, list):

            flattened += flatten_array(element)

        else:

            flattened.append(element)

    return flattened

This function takes a nested array as its argument and returns a flattened version of it. The function works by iterating over each element in the input array. If an element is a list, it recursively calls itself on that sublist until all nested sublists have been flattened. If an element is not a list, it is appended to the flattened array. This process continues until all elements have been flattened and the final flattened array is returned.

Let's break down the code:

1. The flatten function takes an array arr as input.
2. We initialize an empty array called result which will store the flattened output.
3. We loop through each element of the input array using a for loop.
4. For each element, we check if it is an array using the Array.isArray method. If it is, we recursively call the flatten function on that array and concatenate the resulting flattened array to the result array.
5. If the element is not an array, we simply add it to the result array using the push method.
6. Finally, we return the flattened result array.

Here's an example of using the flatten function:

var nestedArray = [1, [2, [3, 4], 5], 6];

var flattenedArray = flatten(nestedArray);

console.log(flattenedArray); // Output: [1, 2, 3, 4, 5, 6]

In this example, the input array nestedArray contains nested arrays. The flatten function is called on this input array, which returns the flattened output array [1, 2, 3, 4, 5, 6].

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