TheGreatRambler

// src https://codepen.io/sachmata/post/elegant-pairing

szudzik.getindex = function(x, y) {
    var xx = x >= 0 ? x * 2 : x * -2 - 1;
    var yy = y >= 0 ? y * 2 : y * -2 - 1;
    return (xx >= yy) ? (xx * xx + xx + yy) : (yy * yy + xx);
};

szudzik.unpair = function(z) {
    var sqrtz = Math.floor(Math.sqrt(z));