Allow easy modification to key/value objects.

except.js

function With( key, value ) {
  this[key] = value;
  return this;
};
function Except( key ) {
  delete this[key];
  return this;
};
  
exports.augment = function() {
  if (Object.prototype.with && Object.prototype.with !== With) {
    throw new Error("Object.prototype already contains a member 'with'.");
  }
  Object.prototype.with = With;
  
  if (Object.prototype.except && Object.prototype.except !== Except) {
    throw new Error("Object.prototype already contains a member 'except'.");
  }
  Object.prototype.except = Except;
}

exports.reset = function() {
  if (Object.prototype.with === With)
    delete Object.prototype.with;

  if (Object.prototype.except === Except)
    delete Object.prototype.except;
};