Android Development with Kotlin

Named parameters in function types

Until now, we've only seen definitions of function types where only the types were specified, but not parameter names. Parameter names have been specified in function literals:

    fun setOnItemClickListener(listener: (Int, View, View)->Unit) { 
        // code 
    } 
    setOnItemClickListener { position, view, parent -> /* ... */ } 

The problem comes when the parameters are not self-explanatory, and the developer does not know what the parameters mean. With SAMs there were suggestions, while in the function type defined in the previous example, they are not really helpful:

The solution is to define function types with named ...