A modern programming language that makes developers happier.

kotlinlang

Which one is better? With `data class` or only `class` ? I can only see the flexibility of using `copy()` fun when its data class. Any others pros/cons?
```sealed class Errors(open val errorCode: String) {
    data class SomeError(
        override val errorCode: String
    ) : Errors(errorCode)
}

OR 

sealed class Errors(open val errorCode: String) {
    class SomeError(
        override val errorCode: String
    ) : Errors(errorCode)
}```

Some benefits of data class would include
• equality tests
• copy()
• (if the error ever had more than one property) the ability to positionally destructure.
 Can’t think of any major cons

&gt; Larger binary size
Cons for data class?

Yeah. Although it's nothing a dead code eliminator can't fix.

So basically if I don't need to use `copy()`then I can go with just `class`

if you don’t need equality testing, `copy()` or destructuring then you can go with class. Personally i find the equality testing is often the reason i go with data classes