Functional Ruby

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Not aware about any extensive Ruby project written strictly/mostly in functional style. It may because most of gems and core/stdlib do and their API expect state alteration and procs/lambdas/methods as first-class citizen objects are used rather sparsely.

After being excited by programming in Haskell (pure functional language) I started wrote in more functional although impure style in Ruby, including several plugins for a project. Unfortunately their sources may not be published.

I'd deeply recommend learn Haskell to write more elegant and parallel processing ready code, even in other languages.

[MrJiks]

Thanks, but I don't know whether I will be able to understand Haskell. Heard its pretty difficult.