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I've had (and likely will still have) beginner-level problems in learning Ruby and/or Rails.

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When I've run into problems so far, I didn't have a good-enough understanding to be able to form a proper question, and instead got help from other developers in the project.  So I'm afraid my list is going to be mostly "something about X" rather than real titles.

- Something about scoping and the `unscoped` keyword.

- Something about nil-safe references.  I can stick a `&` on the end of everything that could be nil in function calls like `something&.function()`, where calling `function()` on nil emits an error, but I *probably* shouldn't just be sprinkling `&`s through my code just in case, right?  But what *should* I be doing?

- This might sound dumb, but in view code, it took me a while to notice (and thus get) the difference between `<% ruby code %>` and `<%= ruby code %>`.

- Our project uses the MVC pattern but there are also helpers (in `app/helpers`, alongside `app/view` etc).  How are those tied in to the rest of the code?  I usually run into this by starting from a view, trying to track behavior back to the controller, and coming up empty in the controller.

- Something about database migrations versus maintenance tasks -- if I need to move some data, when should I prefer which?

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