Ch04 Ep02: Fearless Refactoring with Functional Programming | Scala

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In FP, functions must satisfy three rules: they must be total, deterministic and pure, which means that they don’t perform actions, they only produce a value. Those rules are really constraining. So if we want people to follow them, they must provide significant advantages, otherwise no one would make the effort.

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Perfect, intuitive examples of the humongous reasoning benefits of referential transparency. So refreshing to see it taught this way. Great job! 🙌

kitlangton
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The answer on "refactoring: extract-inline" should again be "yes if they are fp functions". Futures are a different beast and do not fit in this basic video in my opinion.

alwinsn