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But Lisp's object system is kind of famous. Where are the people beating the averages in pure fp languages? There should be a lot of really amazing software if

by sisu2019 8y ago

But Lisp's object system is kind of famous. Where are the people beating the averages in pure fp languages? There should be a lot of really amazing software if fp is as good as it's made out to be and employed exclusively by elite non-blub programmers. There really isn't though, except maybe in finance where F# is doing quite well. And that's great but even F# is multi paradigm.

kazinator 8y ago
My home-grown accounting system, written in a language with great support for functional programming, is based on objects. accounts, transactions, transaction deltas, ledgers, are all objects. Starting from a blank slate, a file is loaded which defines the ledger entries. These definitions are processed one by one, using mutable updates to the object framework. What is left is then the state of the ledger with all those entries and that can be subject to various queries and reports.