kotlin中缀函数 infix function 中缀函数 中缀函数必须满足的3个条件: 1. 必须是成员函数或扩展函数; 2. 只能有一个参数; 3. 其参数不得接受可变数量的参数且不能有默认值。 即中缀函数为为成员函数或者扩展函数,并且只有一个参数、参数不能是可变参数且不能有默认值, 并且使用infix修饰。 在进行函数调用的时候...
For example, themockito-kotlinlibrary defines some infix functions —doAnswer,doReturn,anddoThrow —for use when defining mock behavior. Writing an infix function is a simple case of following three rules: The function is either defined on a classor is an extension method for a class ...
kotlin 中的函数支持可变参数,用vararg关键字声明。它生成的实际上是一个同类型的数组参数。在函数内可以数组形式使用它,如下: 1fun fun1(vararg numbers : Int){2val sz =numbers.size3for(iin0until sz){4Log.e(TAG_VARARG,"fun1 bumber[$i] = ${numbers[i]}")5}6for(numinnumbers){7Log.e(TAG...
You can make a function call in Kotlin using infix notation if the function is amember function(or anextension function). has only one single parameter. is marked withinfixkeyword. Example: User-defined Function With Infix Notation classStructure() {infixfuncreatePyramid(rows:Int){vark =0for(...
看一下我这个简单的扩展函数,我用了中缀符号:infix fun View.isValidColor(hexColor: String?): Boolean { var isValid = ...android - kotlin infix not working on one parameter extension function
Currently, DCL syntax/grammar allows for infix function calls. The main reason for that is thepluginsblock, where the infix notation was/is the recommended way to specify plugin IDs and versions in the Kotlin DSL. Since we want Kotlin DSL content to be copy-pastable in DCL (as long as ...
Kotlin 函数编程详解 ,typecasts, and the rangeTo operator. The following expressions are equivalent:1shl2+3and1shl... parentheses. When we call a vararg-function, we can pass arguments one-by-one, e.g. asList(1,2,3), or, if we ...
Kotlin中缀函数(Infix Functions)是一种特殊类型的函数,可以使用中缀符号(如+、-、*、/等)来调用。这种语法使得代码更加简洁易读。中缀函数通常用于描述两个对象之间的关系,例如数学中的加法、减法等运算。 要定义一个中缀函数,需要将infix关键字放在函数声明前面,而且必须满足以下条件: 必须是成员函数或者扩展函数 只有...