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I don't think anyone (sensible) is advocating that the entire program must be free of side effects, just that side effects have a cost in terms of clarity and m

by jamii 16y ago

I don't think anyone (sensible) is advocating that the entire program must be free of side effects, just that side effects have a cost in terms of clarity and maintainability and so should be avoided when possible. > programming a GUI or other heavily event-driven environment Nitrogen is a nice event-based GUI library written in erlang. Have a look at the demos here: http://nitrogenproject.com/demos http://nitrogenproject.com/demos

eru 16y ago
> I don't think anyone (sensible) is advocating that the entire program must be free of side effects, just that side effects have a cost in terms of clarity and maintainability and so should be avoided when possible. Indeed. Haskell for example, just `tags' all side-effecting code in the type system. You are free to use lots of side-effects in Haskell. (Even though that would miss the point of the language.)