Feature: Date and DateTime classes from Ruby about opal HOT 5 OPEN

I agree with you two @rubyFeedback and @AndyObtiva . I just noted the short-term partial solutions.

from opal.

Unfortunately, we won't be able to import date/datetime from Ruby, as it's implemented in C very much. What I may suggest would be to use Date.parse which is implemented.

Ref: #2569 which adds a bit of additional functionality

from opal.

What I may suggest would be to use Date.parse which is implemented.

One problem with this may be that it may not be extremely convenient to go the work-around route. Andy may
probably have to remember using Date.parse(), but even though I myself do not use DateTime#strptime, I think
it would simply be better to be able to stay "within" ruby as much as possible. One of opal's key promises is to just
write ruby and not have to worry about javascript much at all. I think the better long-term solution would be to
offer the same functionality whenever that is possible.

from opal.

@hmdne I was thinking you'd do what the JRuby folks do. Simply re-implement Date and DateTime in JavaScript or Opal Ruby code kinda like how they re-implement Ruby C features in Java or JRuby itself. There is no need to bring in the exact C code into Opal as long as you simulate it correctly in JavaScript or Opal Ruby code. It seems the PR that you linked to is doing some of that. Ideally, you would eventually implement the complete APIs of Date and DateTime.

That's very important to have in Opal in my opinion because Ruby Software Engineers are used to using Date and DateTime and I am sure those APIs are used by several Ruby gems, which would become portable in Opal once Date and DateTime are fully supported.

from opal.

@rubyFeedback regarding #2569, when working on it and looking into ruby source to get compatibility right, i noticed, that the current approach using regexps will never be sufficient, due to various conditions/special cases. Best approach seems to port c source to js for best compatibility. Needs some time.

from opal.