lastertd

``` static race(args: T) { //约定T从属于Iterable类型 return new MyPromise((resolve, reject) => { const promise = Array.from(args); //将args转化为数组类型 if (promise.length === 0){ //假设数组长度为0, 则永远处于pending状态 return } /**会执行所有resolve或者reject, * 但是Promise内部状态只会变化一次（pending->fulfilled | pending->rejected）...