What type of programming or project would only involve the Ruby language? Rather than using RoR. What was Ruby used for before the Rails framework existed is what I am basically asking.
What was Ruby used for before Rails?
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There is nothing that other programing languages can do that Ruby cannot also do. It is, like most other programming languages, a general-purpose language.Any language that supports calling C API functions can do anything C can do. And, since most operating systems are written in C and ship with C libraries for everything the OS supports, then therefore Ruby can do any of those things. That includes creating and manipulating windows and widgets, connecting to Internet hosts, or anything else.In theory, one could use Ruby to write an operating system (though it's certainly not well-suited to the task), given the low-level primitive objects that are needed. One could also embed Ruby in any application or service that has C bindings, no matter what language it was written in. You could also write a compiler in Ruby. (I know several people who have done just that.)