Can Kotlin data class have more than one constructor?

Question

I know that data class are like simple models in kotlin with getters and setter by default and are as simple this:

data class User(val name: String, val age:         


        

Answer 1

Default values in the primary constructor eliminates many needs for secondary constructors, but if the needed instance depends on logic based on data that must be analyzed the better answer may be to use a companion object.

data class KeyTag(val a: String, val b: Int, val c: Double) {
    companion object Factory {
        val empty = KeyTag("", 0, 0.0)

        fun create(bigString: String): KeyTag {
            // Logic to extract appropriate values for arguments a, b, c
            return KeyTag(a, b, c)
        }

        fun bake(i: Int): KeyTag = KeyTag("$i", i, i.toDouble())
    }
}

Usage is then:

val ks = KeyTag.create("abc:1:10.0")
val ke = KeyTag.empty
val kb = KeyTag.bake(2)