advent-of-code | Code submissions . | Learning library
kandi X-RAY | advent-of-code Summary
kandi X-RAY | advent-of-code Summary
My Advent of Code submissions. For 2021 and before, these are the original code I used, without any modifications after-the-fact. As such, they are probably not as efficient or short as they should be, because I want a working solution faster, not a better solution. For 2022 and after, these are the solutions uploaded to my YouTube channel.
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Top functions reviewed by kandi - BETA
- Evaluate a tree node .
- Generate an amphipodal step .
- Feed a single character .
- Parse a keyid string .
- Return a set of all elements in x
- Parses a string .
- Compute the vsum sum .
- Parse a floating point number .
- Calculate the distance between two points .
- Initialize the registry .
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QUESTION
I'm trying to get use a BTreeMap (or HashMap) from within a struct but I can't because it keeps complaining an ownership problem.
cannot move out of
self.vertices
which is behind a shared reference move occurs becauseself.vertices
has typestd::collections::BTreeMap>
, which does not implement theCopy
trait help: consider borrowing here:&self.vertices
rustc(E0507) digraph.rs(13, 17): move occurs becauseself.vertices
has typestd::collections::BTreeMap>
, which does not implement theCopy
I'm totally confused at this stage.
...ANSWER
Answered 2020-Dec-05 at 22:56The problem seems to be that you're trying to mutate something that you have not marked as mutable. The add_edge
method clearly has to mutate the struct but you have an &self
receiver instead of an &mut self
. Upon making that change the code compiles:
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