{{alias}}( [out,] x )
    Returns a normal number and exponent satisfying `x = y * 2^exp` as an array.

    The first element of the returned array corresponds to `y` and the second to
    `exp`.

    Parameters
    ----------
    out: Array|TypedArray|Object (optional)
        Output array.

    x: number
        Double-precision floating-point number.

    Returns
    -------
    out: Array|TypedArray|Object
        An array containing `y` and `exp`.

    Examples
    --------
    > var out = {{alias}}( 3.14e-319 )
    [ 1.4141234400356668e-303, -52 ]
    > var y = out[ 0 ];
    > var exponent = out[ 1 ];
    > var bool = ( y*{{alias:@stdlib/math/base/special/pow}}(2.0, exponent) === 3.14e-319 )
    true

    // Special cases:
    > out = {{alias}}( 0.0 )
    [ 0.0, 0 ];
    > out = {{alias}}( {{alias:@stdlib/constants/float64/pinf}} )
    [ Infinity, 0 ]
    > out = {{alias}}( {{alias:@stdlib/constants/float64/ninf}} )
    [ -Infinity, 0 ]
    > out = {{alias}}( NaN )
    [ NaN, 0 ]

    // Provide an output array:
    > out = new {{alias:@stdlib/array/float64}}( 2 );
    > var v = {{alias}}( out, 3.14e-319 )
    <Float64Array>[ 1.4141234400356668e-303, -52 ]
    > bool = ( v === out )
    true

    See Also
    --------