code: function race(promises) {
  			if(typeof promises !== 'object' || promises === null) {
  				return reject(new TypeError('non-iterable passed to race()'));
  			}
  
  			// Sigh, race([]) is untestable unless we return *something*
  			// that is recognizable without calling .then() on it.
  			return promises.length === 0 ? never()
  				 : promises.length === 1 ? resolve(promises[0])
  				 : runRace(promises);
  		}
docs: Fulfill-reject competitive race. Return a promise that will settle
  to the same state as the earliest input promise to settle.
  
  WARNING: The ES6 Promise spec requires that race()ing an empty array
  must return a promise that is pending forever.  This implementation
  returns a singleton forever-pending promise, the same singleton that is
  returned by Promise.never(), thus can be checked with ===
  
  @param {array} promises array of promises to race
  @returns {Promise} if input is non-empty, a promise that will settle
  to the same outcome as the earliest input promise to settle. if empty
  is empty, returns a promise that will never settle.