I defined the function "fireAtTarget" in kotlin. As an argument, I need to insert a default value for the list. How could I achieve this?
fun fireAtTarget(massKg: Double=80.2, eachGunAmmo: List<Int>=listOf(2, 3): Boolean{
//function body
}
I expect to call fireAtTarget() with no arguments getting 0 error messages
There is a syntax error in your code: you simply forgot to close bracket in function parameters declaration:
fun fireAtTarget(massKg: Double=80.2, eachGunAmmo: List<Int> = listOf(2,3)): Boolean {
//function body
}
I was experiencing this problem (IntelliJ reports an error Expecting a top level declaration
) with the following code:
fun foo(value: List<Int>=listOf(1,2)) { }
The problem was solved by inserting whitespace space before the equals List<Int>*space*=listOf
fun foo(value: List<Int> = listOf(1,2)) { }
The Kotlin language has a >=
operator that the original may be confused with.
See: https://kotlinlang.org/docs/reference/operator-overloading.html#comparison
您可以创建一个具有默认值的列表,如下所示:
val defaultValueList = List<String>(10) {"I am default"}
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