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Did functional programming predated Object oriented programming or rather the opposite?
By "functional" I don't mean "procedural" (i.e. I don't mean to programming which is done solely or primarily with these data structures commonly known as "functions" but are actually procedures), rather, I mean "functional" by basic (mathematical?) programming meaning.
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I would argue that functional programming predates functioning computers.
Alonzo Church developed the Lambda Calculus in the 1930s. This may be a fairly austere form of functional programming, but I think it qualifies.
As noted in a comment, Lisp (which was heavily influenced by the lambda calculus) was developed in the 1950's; that's a long time before people started developing the idea of object orientation.
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According to "Composing Software", by Eric Elliot, pages 13 to 17, yes.
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