
{{alias}}( N, clbk[, thisArg] )
    Returns a filled two-dimensional symmetric nested array according to a
    provided callback function.

    The callback function is provided one argument:

    - indices: current array element indices.

    As the output array is symmetric, the provided callback is only invoked for
    elements in the upper triangle (i.e., indices[1] >= indices[0]).

    Parameters
    ----------
    N: integer
        Number of rows and columns.

    clbk: Function
        Callback function.

    thisArg: any (optional)
        Callback execution context.

    Returns
    -------
    out: Array
        Output array.

    Examples
    --------
    > function clbk( idx ) { return idx[ 0 ] + idx[ 1 ]; };
    > var out = {{alias}}( 2, clbk )
    [ [ 0, 1 ], [ 1, 2 ] ]

    See Also
    --------

