> you want to freeze everything *.empty I don't think most of those *need* to be frozen, per se, since they're already immutable: `Function`, `String`, `Number`, `Boolean`, `RegExp`, … all immutable themselves. `Array.prototype` is however mutable (`Array.prototype.push(1,2,3)`), so freezing it from mutation is an extra step of caution you might want to take.
FWIW, I've used `Array.prototype` as an empty array in quite a few cases, and never actually run across one where it got mutated. *That* part is currently just theory, I think. > you can’t freeze Array.prototype. I think what he meant was, freezing Array.prototype would both prevent it from being mutated, but also prevent it from being extended (Array.prototype.superCool = ..). That seems, to me anyway, as a negative. So in support of Axel's argument, an `Array.empty` *could* definitely be frozen, if it were separate, without affecting `Array.prototype` extensibility. _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
