Hi. I'd like to check whether `null` property is e...

# getting-started

[speed_star]

Hi. I'd like to check whether null property is exists in data class. Should I check for each property like as below? Or there is other good way?

data class Book(val name: String?, val author: String?, val price: Int?)

fun isExistNull(): Boolean {
    if (name == null || author == null || price == null) {
        return true
    }
    return false
}

[jbnizet]

return (name == null || author == null || price == null) is sufficient. But other than that, yes, it’s the straightforward way to do it.

[Nick Johnson]

name ?: author ?: price ?: true == true should also work