What is referential transparency?
The Eric Normand Podcast - Un pódcast de Eric Normand
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Referential transparency is a term you’ll hear a lot in functional programming. It means that an expression can be replaced by its result. That is, 5+4 can be replaced by 9, without changing the behavior of the program. You can extend the definition also to functions. So you can say + is referentially transparent, because if you call it with the same values, it will give you the same answer.
