Constructors with default arguments.md

Constructors with default arguments

You always have to specify all the arguments for a constructor.

Explanations

In Kotlin, you can omit specifying the values of constructor fields if they have default values:

class ConstructorWithDefaultArgumentsClass(
    val param1: String,
    val param2: Int = 300,
    val param3: Boolean = false
)

fun constructorWithDefaultArgumentsExample() {
    ConstructorWithDefaultArgumentsClass(param1 = "123")
}

After switching to Swift, this feature disappears, and all arguments must be specified when initializing an object:

ConstructorWithDefaultArgumentsClass(param1: "123", param2: 500, param3: false)

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