A high order function is a function which accepts another function as a parameter or returns another function. We just saw how we can use a function as a property, so it's quite easy to see that we can accept another function as a parameter or that we can return another function from a function. As stated previously, technically the function that receives or returns another function (it may be more than one) or does both is called a high-order function.
In our first lambda example in Kotlin, the invokeSomeStuff function was a high-order function.
The following is another example of high-order function:
fun performOperationOnEven(number:Int,operation:(Int)->Int):Int {
if(number%2==0) {
return operation(number)
} else {
return number
}
}
fun main(args: Array<String>) {
println("Called with 4,(it*2):...
