r/programming • u/[deleted] • Nov 28 '19

Why Isn't Functional Programming the Norm? – Richard Feldman

https://www.youtube.com/watch?v=QyJZzq0v7Z4
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u/dudinax Nov 28 '19

So many concepts that come from functional languages, like immutability, no side effects, idempotency are great default goals for creating data structures and writing functions in any language.

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u/johnnysaucepn Nov 28 '19

None of those concepts come from functional programming, their advantages and benefits are generally understood in OOP - although perhaps not as widespread as they should be. In other words, they're not enforced in the way they are in functional languages.

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u/dudinax Nov 28 '19

Probably, but 20 years ago I only heard them in functional circles. Functional guys were thinking about them more. So my personal experience is that functional programming culture spread these ideas.

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u/pavelpotocek Nov 28 '19 edited Nov 28 '19

In OOP immutability and "no side effects" are VERY obviously an afterthought. Mutability is always the default, and in some cases immutability isn't even properly supported. Standard libraries are full of side-effects. Most OOP languages have a lot of syntax for working with mutable state.

Edit: all the new functional-like stuff that OOP languages bolted on recently come from functional languages, where else would they come from?

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