{{alias}}( x[, options], fcn[, thisArg] )
    Flattens an ndarray according to a callback function.

    Parameters
    ----------
    x: ndarray
        Input ndarray.

    options: Object (optional)
        Function options.

    options.depth: integer (optional)
        Maximum number of dimensions to flatten. By default, the function
        flattens all input ndarray dimensions.

    options.order: string (optional)
        Order in which input ndarray elements should be flattened. The following
        orders are supported:

        - row-major: flatten in lexicographic order.
        - column-major: flatten in colexicographic order.
        - same: flatten according to the stated order of the input ndarray.
        - any: flatten according to physical layout of the input ndarray data in
        memory, regardless of the stated order of the input ndarray.

        Default: 'row-major'.

    options.dtype: string (optional)
        Output ndarray data type. By default, the function returns an ndarray
        having the same data type as the provided input ndarray.

    fcn: Function
        Callback function.

    thisArg: any (optional)
        Callback execution context.

    Returns
    -------
    out: ndarray
        Output ndarray.

    Examples
    --------
    > var x = {{alias:@stdlib/ndarray/array}}( [ [ 1.0, 2.0 ], [ 3.0, 4.0 ] ] );
    > function f ( v ) { return v * 2.0 };
    > var y = {{alias}}( x, f )
    <ndarray>[ 2.0, 4.0, 6.0, 8.0 ]

    See Also
    --------