The horizon for functional programming is expanding with two languages in development, including Streem, from the founder of the Ruby language, and Mochi, which leverages Python.
The brainchild of Ruby founder Yukihiro "Matz" Matsumoto, Streem is described on its GitHub page as a concurrent scripting language based on a programming model similar to shell and influenced by Ruby, Erlang, and other functional programming languages. "Streem is my experiment to implement a stream-based programming language," Matsumoto, chief architect for Ruby at Heroku, said in an email on Sunday. "The primary motivation is to experiment [with ] concurrent programming with stream model that is higher abstraction [and a] stream-based programming model that might be [the] basis for the future Ruby 3.0 concurrent model."
Currently, Matsumoto has no particular audience for Streem since it is still in development. "It's far before [an alpha stage of development]," he said. "In fact, it was supposed to be my personal workplace for the experiment. I was so surprised so many people found it and talked about it. At the same time, I feel the huge possibility of stream programming. It can be used for text processing, data munging, distributed logging, and even Web programming."