I get that arrays are meant to stand in for more asynchronous sources of data but those things seem so different to me that I don't understand why you'd want a

I get that arrays are meant to stand in for more asynchronous sources of data but those things seem so different to me that I don't understand why you'd want a library that treats them the same. If you need to map an array that's taken care of. I know I'm being dense, I just don't get it.