Readable streams allow us to do things such as representing infinite data series and reading out data that does not necessarily fit in memory, and much more. Writable streams can be created to connect with outputs that operate at the C level to control hardware (such as sockets), to wrap around other objects that aren't streams but nevertheless have some form of API to where data is pushed or to collect chunks together and potentially process them in batch.
In this recipe, we're going create readable and writable streams using the from2 and to2 modules. In the There's more... section, we'll discover how to do the equivalent with Node's core stream module.
