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blog(aoc-2022): fix footnotes in 3rd week

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Signed-off-by: Matej Focko <me@mfocko.xyz>
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Matej Focko 2023-07-07 00:23:33 +02:00
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blog/aoc-2022/03-week-3.md
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@ -443,7 +443,7 @@ though :) Let's go through the details.
#### `Default` trait #### `Default` trait
For the first time and twice I had a need to have a default value for my types, For the first time and twice I had a need to have a default value for my types,
enumerations in this case. Rust offers a very nice trait[^4] that is described enumerations in this case. Rust offers a very nice trait[^1] that is described
as: as:
> A trait for giving a type a useful default value. > A trait for giving a type a useful default value.
@ -451,7 +451,7 @@ as:
I guess it sums it up nicely. The more interesting part about this is the fact I guess it sums it up nicely. The more interesting part about this is the fact
that you can use the _macro machinery_ to save yourself some typing. If you have that you can use the _macro machinery_ to save yourself some typing. If you have
enumeration of which the default value doesn't bear any parameter, you can just enumeration of which the default value doesn't bear any parameter, you can just
do[^5]: do[^2]:
```rust ```rust
#[derive(Default)] #[derive(Default)]
@ -466,18 +466,13 @@ enum Color {
#### Abusing negation #### Abusing negation
If you want to use a _unary minus_ operator on your own type, you can implement If you want to use a _unary minus_ operator on your own type, you can implement
a `Neg` trait[^6]. I was dealing with a binary tree and needed a way how to look a `Neg` trait[^3]. I was dealing with a binary tree and needed a way how to look
at the other side, so I have just implemented the negation for flipping between at the other side, so I have just implemented the negation for flipping between
left and right :smile: left and right :smile:
[^1]: Copy-pasting might be a relaxing thing to do, but you can also discover [^1]: [`Default`](https://doc.rust-lang.org/std/default/trait.Default.html) docs
nasty stuff about your PC. See [this Reddit post and the comment]. [^2]: Pardon my example from the graph algorithms ;)
[^2]: [GitHub profile](https://github.com/martinjonas) [^3]: [`Neg`](https://doc.rust-lang.org/std/ops/trait.Neg.html) docs
[^3]: Even though you can use it even for libraries, but handling errors from
libraries using `anyhow` is nasty… You will be the stinky one ;)
[^4]: [`Default`](https://doc.rust-lang.org/std/default/trait.Default.html) docs
[^5]: Pardon my example from the graph algorithms ;)
[^6]: [`Neg`](https://doc.rust-lang.org/std/ops/trait.Neg.html) docs
[_Advent of Code_]: https://adventofcode.com [_Advent of Code_]: https://adventofcode.com
[`itertools`]: https://crates.io/crates/itertools [`itertools`]: https://crates.io/crates/itertools