/**
 * Returns the sign of the given expansion such that a negative value means a
 * negative sign and a positive value means a positive sign, 0 meaning 0 of
 * course.
 * 
 * * see [Shewchuk](https://people.eecs.berkeley.edu/~jrs/papers/robustr.pdf)
 * 
 * From Shewchuk: "A nonoverlapping expansion is desirable because it is easy to 
 * determine its sign (take the sign of the largest component) ... "
 * 
 * @param e A floating point expansion with zeroes eliminated.
 */
function eSign(e: number[]) {
    return e[e.length-1];
}


export { eSign }