Added Promise<T>.First() to find the first promise that returns a value.

[RoryDungan]

Looks cool but isn't this the same functionality as Promise.Race?

[alonsohki]

Not exactly. Race() is the first of All(), while First() is the first of Sequence().

[alonsohki]

This is how I am using it, which is a good use case:

            ResolveDNS(server)
                .Then(entry =>
                {
                    var requests = from address in entry.AddressList
                                   select new Func<IPromise<double>>(() => GetNTPTime(address));
                    return Promise<double>.First(requests);
                })

It takes a list of addresses that a host resolves to, and returns the first one that works (in case one of them doesn't work, times out, or raises any other issue).

[alonsohki]

Is there any reason why this isn't being approved?

[RoryDungan]

@Borningstar or @kalvinpearce can you take a look at this?