英文定义:A callback is a function that is passed as an argument to another function and is executed after its parent function has completed 中文理解:回调函数被用作参数传到另一个主函数里面,当那个主函数执行完之后,再执行传进去的这个函数。这个过程就叫做回调; 代码示例 //定义主函数,回调函数作为参数...
a function inside another function: 代码语言:javascript 复制 fun dfs(graph: Graph) { fun dfs(current: Vertex, visited: Set<Vertex>) { if (!visited.add(current)) return for (v in current.neighbors) dfs(v, visited) } dfs(graph.vertices[0], HashSet()) } Local function can access ...
typealias CalcStrategy = (principal: Double) -> Double fun getStrategy(taxRate: Double): CalcStrategy = { principal -> (taxRate / 100) * principal } Things change when we move to deeper usage of functions. The following snippet in Kotlin defines a function generating another function: val ...
Function references are another of those great improvements that we get with Kotlin, which are kind of exotic when we come from Java. You already know that Kotlin supports functions as a type, what means that you can save a function in a variable, use it as another function argument, or ...
Another way of starting a coroutine is async {}. It is like launch {}, but returns an instance of Deferred<T>, which has an await() function that returns the result of the coroutine. Deferred<T>...
Function parameters have names and types, types cannot be omitted. The format of an argument is: name followed by colon and a type. 代码语言:javascript 复制 funtell(who:String,what:String):String{return"$who is $what"} Function Arguments ...
KT-71651 K2 IDE: False positive NON_LOCAL_SUSPENSION_POINT in suspend function call KT-72164 K2. IllegalArgumentException when pre and post increment are used simultaneously in assignment KT-71174 Illegal scope used KT-72407 FirImplementationByDelegationWithDifferentGenericSignatureChecker: FirLazyExpressio...
One approach is to send MIME-encoded results to the client using the MIME helper function: fun MIME(vararg mimeToData: Pair<String, String>): MimeTypedResult For example: MIME("text/html" to "Some HTML", "text/plain" to "No HTML for text clients") Another approach is to use the ...
2、函数(function) 什么是函数? 以特定功能组织起来的代码块 fun函数名:[返回值类型]{[函数体]} fun函数名= [表达式] //返回值是Unit(相当于java中的void),可不写 匿名函数 fun([参数列表])... 举例: val say = fun(name:String) = println("Hello") ...
注意suspend函数不能在普通函数中调用,否则会报Suspend function 'xxx' should be called only from a coroutine or another suspend function的提示;如需调用suspend函数,只能从其他suspend函数进行调用,或通过使用协程构建器(例如launch)来启动新的协程。