Twelve async workers fetching pages, all consulting a map of about 50k domain to rate limit entries. Reads are maybe 95% of accesses, writes happen when a new domain appears or a limit updates. I can either wrap it in…
I have a and I'm iterating over incoming items, and for each one I want to look at the last element already in the vec to decide whether to merge or push a new one. The compiler tells me I can't borrow as mutable…
I have a trait with an async method, implemented for a struct that holds an . It compiles fine and the tests pass when I await it directly. The moment I call it inside I get a wall of text ending in 'future is not…
I have a struct holding a and I want a method that returns an iterator over the records matching a predicate, without collecting into a new Vec. Every attempt ends in either a lifetime error about the closure, or the…
Six weeks in, coming from ten years of Python and some C. I can write code that works but I spend maybe half my time restructuring things to make the compiler happy, and I never predict in advance which design will be…