More convenience functions

[gammelalf]

How many convenience functions should we add?

Pro: Is convenient
Con: Increases API surface which might be harder to navigate

Suggested functions:

• query!().map_all(...) which queries all entries, returns them as Vec but maps them through a closure first

  Currently possible solutions:

  • query!().stream().map_ok(...).try_collect::<Vec<_>>() (requires TryStreamExt)
  • query!().all().into_iter().map(...).collect::<Vec<_>>() (requires unnecessary alloc)

  Alternatives:

  • Extend Selector and Decoder to be easier to implement / extend using combinators.
    (Already kind of planned, but will take a while)