Whenever I pass the value of a string list I'm getting an error

Question

fun sayHello(greet:String,itemsToGreet:List<String>){
    itemsToGreet.forEach { itemsToGreet ->
        println("$greet, $itemsToGreet")
    }
}

fun main() {
    val interestingThings = listOf("kotlin","program","comic")
    sayHello(greet="hi", interestingThings)
}

Answer 1

A couple of problems:

• You can't mix named and positional arguments in a method call. This results in a compilation error.
• While not explicitly wrong, the fact that you're shadowing the itemsToGreet variable in your lambda expression is a code smell.

This fixes both:

fun sayHello(greet:String,itemsToGreet:List<String>) {
    itemsToGreet.forEach { item ->                        // new variable name
        println("$greet, $item")
    }
}

fun main() {
    val interestingThings = listOf("kotlin", "program", "comic")

    sayHello("hi", interestingThings)                     // positional arguments
    sayHello(greet="hi", itemsToGreet=interestingThings)  // named arguments
}