Tuesday, 12 December 2017

Kotlin Tutorials in Hindi | Invoke operators



Here are some expressions using invoke operator with corresponding functions in Kotlin.
ExpressionTranslated to
a()a.invoke()
a(i)a.invoke(i)
a(i1, i2, ..., in)a.inkove(i1, i2, ..., in)
a[i] = ba.set(i, b)
In Kotlin, parenthesis are translated to call invoke member function.

Example
class Example{
 operator fun invoke(x:Int){
 println("You are in invoke function with value of x ="+x)
 }
 }

fun main(args: Array<String>) {
 var e:Example = Example()
 e(10)
 }
Output:
You are in invoke function with value of x = 10

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