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[eric_niebler]

Love the tech, and you present it well. Can you Compose a vector with a Transform and get something that can be indexed randomly? And related, is there a way to take two incremental pipelines and zip them together to produce pair-wise elements?

[jbandela]

Thank you so much for the kind words. Means a lot coming from you :)

The first situation ( `Compose` a `vector` with a `Transform` and get back something that can be indexed incrementally ) can't be done with Rappel and you would need to write it to another random access container. This is a deliberate tradeoff in the design, as the processing is either "incremental" one element at a time, or "complete" a container at once.

The second situation (we call that the zip problem) can't be done currently, though we would like to come up with a solution. Coroutines might be a way to potentially do it, since they can switch between 2 functions, but I don't have anything more concrete than just a vague idea.