The content for this week’s newsletter is sponsored by the 19 individuals who authored them!
One of the notable changes in the upcoming Ruby 2.4 release is the unification of
Bignum into a single
Integer class. Following that change, the legacy classes were deprecated recently.
This pull request avoids triggering those deprecation warnings with a feature detection. If you maintain code that references those constants, you might want to adopt this pattern in your projects too!
Related to the unification of the integer classes: native extensions that references the
rb_cBignum C constants need to be updated as well.
The popular json gem is one of those native extensions. Fortunately, all modern versions of Ruby bundles the json library. If your are targeting Ruby 1.9 and above, you could simply remove the json gem as a dependency.
Back in May, a regression was reported that Rails 5 invalidated Ruby’s
class_serial on each request. This internal counter is used to invalidate the class-level method caches.
The issue was tracked down to the use of
instance_exec. While there is hope that this restriction could be relaxed inside Ruby itself, this patch at least temporarily fixes the problem on Rails’ side.
Once upon a time,
Time.zone.now could be quite a bit slower than the stock
Time.now (allegedly up to 25 times slower). This pull request significantly closes the gap.
Have you tried rendering a partial while injecting local variables called “class” or “module”? It wouldn’t work, and it will give you a pretty bizarre error.
This pull requests avoids the error by skipping over invalid local
variable names, while still allowing them to be accessed via
You can read more about this issue, as well as the story behind this pull request in Peter’s blog post.
Did you know that there was an undocumented “faye mode” for Action Cable?
No? Good. Because it’s now gone!
That’s it for this week, as usual there were more changes than what we can fit, feel free to check them yourself here!
Until next week!