3 ms·

N, E, S, W? I think you want an enum for that.

• pmontra 11y ago
  It was an example of replacing constants with symbols when the value of the constant really doesn't matter. Purposely not fancy stuff. I understand the advantages of enums (among the others, their values are constrained) but does JS have enums?
  • ahoge 11y ago
    > does JS have enums? No, but TypeScript and Dart do. Enums don't really work without types. But using Symbols for fake enums is probably a good idea. class Enum { constructor(...props) { props.forEach(p => this[p] = Symbol(p)); } } const dir = Object.freeze(new Enum(...'NESW')); console.log(dir.E === dir.E); // true console.log(dir.E === dir.N); // false Slightly awkward, but this might be about as good as it gets.
    • ahoge 11y ago
      I should have used Object.freeze(this) in the c'tor.