The zipping operation will let you accumulate emissions, but what if you want to subscribe to each emission by all the source producers? Say you have two different producers and have the same set of actions to be applied when subscribing to them; there's no way to mix imperative programming and reactive programming and repeatedly subscribe to both of the producers separately with the same code. It'll also result in redundant code. So, what is the solution here? You got it right; merging all the emissions of all the source producers together and subscribing to them as a whole is the solution.
So, let's get an example here:
fun main(args: Array<String>) { val observable1 = listOf("Kotlin", "Scala", ...
