an ability to pass * named functions or properties as values. Users often ask * "I have a foo() function, how do I pass it as an argument?". * The answer is: "you prefix it with a `::`". */ fun main(args: Array<String>) { val numbers = listOf(1, 2, 3) println(...
asList(1, 2, 3), or, if we already have an array and want to pass its contents to the function, we use the spread operator (prefix the array with *): 代码语言:javascript 代码运行次数:0 运行 AI代码解释 val a = arrayOf(1, 2, 3) val list = asList(-1, 0, *a, 4) Infix ...
We then use set() function to change the earlier assigned value of the specified index position −import java.lang.Exception fun main(args: Array<String>) { var array = Array(5) { i -> i} val index = 3 try { array.set(index, 4) val value = array.get(index) println("The ...
We have an array of integers. The array is filtered with thefilterfunction. It takes an anonymous function as a parameter. val filtered = vals.filter(fun(el) = el > 0) The anonymous function is used to filter the array. [1, 2, 3, 4] We have filtered out negative values. Kotlin c...
When we call a vararg-function, we can pass arguments one-by-one, e.g. asList(1, 2, 3), or, if we already have an array and want to pass its contents to the function, we use thespreadoperator (prefix the array with *): ...
* "I have a foo() function, how do I pass it as an argument?". * The answer is: "you prefix it with a `::`". */ fun main(args: Array<String>) { val numbers = listOf(1, 2, 3) println(numbers.filter(::isOdd))
* "I have a foo() function, how do I pass it as an argument?". * The answer is: "you prefix it with a `::`". */funmain(args:Array<String>){valnumbers = listOf(1,2,3) println(numbers.filter(::isOdd)) }funisOdd(x:Int)= x %2!=0 ...
Additionally,when a function’s final parameter is a function, Kotlin allows us to place the lambda expression outside the parentheses: joinByOperation(aStringList){ lambda expression }Copy This is known astrailing lambda. Next, let’s see how to pass a lambda to the function: ...
@SinceKotlin("1.1") public inline fun <reified T : Enum<T>> enumValues(): Array<T>每个枚举常量,默认都name名称和ordinal位置的属性(这个跟Java的Enum类里面的类似):val name: String val ordinal: Int代码示例:enum class RGB { RED, GREEN, BLUE } >>> val rgbs = enumValues<RGB>()....
// my function to pass into the other fun buz(m: String) { println("another message: $m") } // someone passing buz into foo fun something() { foo("hi", ::buz) } Run Code Online (Sandbox Code Playgroud) 从Kotlin 1.1开始,您现在可以通过在函数引用运算符前面添加实例来使用类成员...