4 ms·

How would you enumerate over a union type? as far as I know there is no way to do that in Elm. Can you show your one line map call youre talking about

• deleted 10y ago
  [deleted]
• eskimobloood 10y ago
  I think he means to make a list of all member of the type and then iterate over it. Then you have the options method that get a union type and can render the correct output
  • Touche 10y ago
    This is mentioned in the article. The author criticizes this because it means they have to keep the type and the list in sync. I think this is a pretty pedantic reason to dismiss a language, personally.
    • charlieflowers 10y ago
      Maybe to _dismiss_ a language. But it is a reasonable _criticism_ of the language. I hate those kinds of edge cases between strong and weak typing where the compiler knows something, but you have to express it again. Granted, though, there aren't many languages that can handle that. As far as I can see, it requires compile-time code execution.
    • darawk 10y ago
      IMO that's a pretty good criticism of a language that's supposed to be type-safe, but forces you to break its type safety because its lack of a feature.
    • nicops 10y ago
      And it's not like any other language you can choose from for working in the browser is perfect.