Promise? Future? Which is for what cases?

[naddika]

In general promises and features are closely related, if not synonims. And in the documentation it says so too.

Therefore, it's confusing which one should be used in what circumstances. And how are they related in the gem? Is one of a more low level or outdated than the other? Do they basically both do the same thing?

Also, existense of these make it even more confusing:

* Concurrent::Promises.future
* Concurrent::Promises::Future
* Concurrent::Future
* [...possibly something similar...]

[kvokka]

Will try to answer you about it Concurrent::Promises::Future is an actual class which carry the implementation of future Concurrent::Promises.future is a helper class method, which give u a simple way to create a future Concurrent::Future is a deprecated module

[chrisseaton]

The idea was if you come to the gem looking for a future, you can have a future, and if you come to the gem looking for a promise, you can have a promise.