Reactive Programming in Kotlin

Pure function

The definition of pure function says that if the return value of a function is completely dependent on its arguments/parameters, then this function may be referred to as a pure function. So, if we declare a function as fun func1(x:Int):Int, then its return value will be strictly dependent on its argument x; say, if you call func1 with a value of 3 twice, then, for both the times, its return value will be the same. A pure function can be a lambda or a named function as well. In the previous example, the first lambda expression was a pure function but not the second one, as for the second one, its return value can be different at different times with the same value passed to it. Let's look at the following example to understand ...