possibly better with de morgans law

Edge.prototype.matchEdge = function (pEdge){
    //if the indexes match either way round
    //(A+B).C+D+E+F = !(!A.!B).C+D+E+F = A.B.C+D+E+F
    return
        this.point0 != pEdge.point0 ||//A
        this.point1 != pEdge.point1 ||//B
        this.point0 == pEdge.point1 &&//C
        this.point1 == pEdge1.point0 &&//D
        this.vector == false && //E
        this.weight == pEdge.weight;//F
};