I was impressed by the number of pull requests from iOS developers, almost as many as from the Linux community. I had no idea iOS developers were so community oriented. Nice.
You have to sign up on UnrealEngine.com and add your Github account name to get an invite to the organization, which lets you access the repository. Instructions are here: https://www.unrealengine.com/ue4-on-github
There's a lot of overlap in the iOS and Rails communities.
Do you meant that the iOS community has been influenced by the Rails community due to overlap and has taken up the culture of OSS from the Rails community?
I mean, when iOS first came out, #macdev and #iphonedev were flooded with mostly Rails and Python devs. And since then, most of the people I've seen who are big names in iOS were first big names in Rails and/or Python.