3 ms·

Aren't points 1 and 2 just arguments for a stricly typed language?

• pm24601 11y ago
  Not at all. Simple things like instanceof / typeof checks can be resolved without a static type system. Because with a const everything is known about the const in question. Obviously the const prototype may change but then again if the const has a frozen prototype - that too can have static analysis applied to it. I am simply repeating the well-known benefits to immutables which is completely orthogonal to a type system, static or otherwise.
  • Havvy 11y ago
    instanceof cannot be determined statically because I can do... const a = {}; Object.setPrototypeOf(a, SomethingElse);
    • pm24601 11y ago
      really? even on a frozen object? Remember I have said const PLUS Object.freeze() Both are needed to get the true immutable effect.