☃️ Learning Rust with AoC 2021 🎄https://adventofcode.com/2021/

Andrei Bârsan

Last update: Feb 2, 2022

Overview

🎄 Andrei's 2021 Advent of Code 🎄

Learning Goals

Rust basics (vectors, arrays, math, etc.)
Rust basic CLI
Rust linear algebra and ndarrays (e.g., https://github.com/rust-ndarray/ndarray)
Rust <> C++ interop
Simple GitHub Actions set up (just linting initially)
Automatic linting and formatting (trunk?)
Finish all AoC problems (hints are OK from Dec 12 on, in the second half)
Basic unit testing

Bonus Goals

Call PyTorch from Rust

Running the Code

Assuming Cargo has been set up, to run a problem, simply use the following:

cargo run --release --bin <XX_problem>

The above should automatically build the code with its dependencies, and run the appropriate problem.

Learnings

Powerful type-safe, efficient, support for ndarrays, but still at times much more verbose than numpy. For instance, computing the median of an array is unnecessarily complicated.
Same for dealing with NaNs. Very rigorous but kind of annoying for simple data science or ML workloads.
Keep the naive implementation arround ALWAYS. Do not simply rewrite it - you can use it to debug your fast implementation. For instance, your fast implementation may work for the demo input in Part 2 but not for the puzzle input.
- Often you can debug parts of the internal state from your fast implementation using your naive one!
- Example: Problem 14 - Polymerization, where you used your naive implementation to fix the fast one by looking at the character histograms produced by the two to identify a counting bug in the letter counting function of the fast implementation.

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Comments

Bump crossbeam-utils from 0.8.5 to 0.8.8 in /practice/general/rust
Bumps crossbeam-utils from 0.8.5 to 0.8.8.

Release notes

Sourced from crossbeam-utils's releases.

crossbeam-utils 0.8.8

Fix a bug when unstable loom support is enabled. (#787)

crossbeam-utils 0.8.7

Add AtomicCell<{i*,u*}>::{fetch_max,fetch_min}. (#785)

Add AtomicCell<{i*,u*,bool}>::fetch_nand. (#785)

Fix unsoundness of AtomicCell<{i,u}64> arithmetics on 32-bit targets that support Atomic{I,U}64 (#781)

crossbeam-utils 0.8.6

Re-add AtomicCell<{i,u}64>::{fetch_add,fetch_sub,fetch_and,fetch_or,fetch_xor} that were accidentally removed in ~~0.8.0~~ 0.7.1 on targets that do not support Atomic{I,U}64. (#767)

Re-add AtomicCell<{i,u}128>::{fetch_add,fetch_sub,fetch_and,fetch_or,fetch_xor} that were accidentally removed in ~~0.8.0~~ 0.7.1. (#767)

Commits

5b4d808 Merge #800

6fa7246 Prepare for the next release

8efcd02 Merge #798

baedeb0 channel: Do not panic on very large timeout

113daf4 Merge #799

5cb7cac Update no_atomic.rs

0081fcc Merge #789 #797

7b2d65f Update to stabilized const_fn_trait_bound

bd75c3c Add force_push to ArrayQueue

b11f1a8 Merge #793

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dependencies
opened by dependabot[bot] 0
Bump nalgebra from 0.17.3 to 0.27.1
Bumps nalgebra from 0.17.3 to 0.27.1.

Changelog

Sourced from nalgebra's changelog.

[0.27.1]

Fixed

Fixed a bug in the conversion from glam::Vec2 or glam::DVec2 to Isometry2.

[0.27.0]

This removes the convert-glam and convert-glam-unchecked optional features. Instead, this adds the convert-glam013, convert-glam014, and convert-glam015 optional features for conversions targeting the versions 0.13, 0.14, and 0.15 of glam.

Added

Add macros matrix!, dmatrix!, vector!, dvector!, point! for constructing matrices/vectors/points in a more convenient way. See #886 and #899.

Add CooMatrix::reserve to nalgebra-sparse.

Add basic support for serialization using rkyv. Can be enabled with the features rkyv-serialize or rkyv-serialize-no-std.

Fixed

Fixed a potential unsoundness issue after deserializing an invalid DVector using serde.

[0.26.2]

Added

Conversion from an array [T; D] to an isometry Isometry<T, _, D> (as a translation).

Conversion from a static vector SVector<T; D> to an isometry Isometry<T, _, D> (as a translation).

Conversion from a point Point<T; D> to an isometry Isometry<T, _, D> (as a translation).

Conversion of an array [T; D] from/to a translation Translation<T, D>.

Conversion of a point Point<T, D> to a translation Translation<T, D>.

Conversion of the tuple of glam types (Vec3, Quat) from/to an Isometry2 or Isometry3.

Conversion of a glam type Vec2/3/4 from/to a Translation2/3/4.

[0.26.1]

Fix a regression introduced in 0.26.0 preventing DVector from being serialized with serde.

[0.26.0]

This release integrates min-const-generics to nalgebra. See our blog post for details about this release.

Added

Add type aliases for unit vector, e.g., UnitVector3.

Add a pow and pow_mut function to square matrices.

Add Cholesky::determinant to compute the determinant of a matrix decomposed with Cholesky.

Add the serde-serialize-no-std feature to enable serialization of static matrices/vectors with serde, but without requiring std.

Modified

The serde crate isn't enabled by default now. Enable the serde-serialize or the serde-serialize-no-std features instead.

... (truncated)

Commits

d7288bf Release v0.27.1

51312d1 Merge pull request #903 from dimforge/glam-conversion-bug

7acd4ec Fix bug in the glam conversion Vec2 -> Isometry2

dfc8ad3 Release v0.27.0

de705a8 Merge pull request #900 from dimforge/glam-multiversion

47a4f52 Replace unchecked glam conversion by TryFrom or checks

4af979c Support multiple version of the optional glam conversion

ef3257b Merge pull request #899 from dimforge/point_macro

0490a84 Fix typo

d6d2a3e Fix macros tests.

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dependencies
opened by dependabot[bot] 0
Bump regex from 1.5.4 to 1.5.5
Bumps regex from 1.5.4 to 1.5.5.

Changelog

Sourced from regex's changelog.

1.5.5 (2022-03-08)

This releases fixes a security bug in the regex compiler. This bug permits a vector for a denial-of-service attack in cases where the regex being compiled is untrusted. There are no known problems where the regex is itself trusted, including in cases of untrusted haystacks.

SECURITY #GHSA-m5pq-gvj9-9vr8: Fixes a bug in the regex compiler where empty sub-expressions subverted the existing mitigations in place to enforce a size limit on compiled regexes. The Rust Security Response WG published an advisory about this: https://groups.google.com/g/rustlang-security-announcements/c/NcNNL1Jq7Yw

Commits

d130381 1.5.5

ae70b41 security: fix denial-of-service bug in compiler

b92ffd5 cargo: use SPDX license format

f6e52da syntax: fix 'unused' warnings

5197f21 fuzz: do not use inherits in Cargo.toml

3662851 doc: fix typo

63ee669 syntax/doc: fix 'their' typo

d6bc7a4 readme: remove broken badge

bd74660 fuzz: try to fix build issue

bd0a142 readme: fix badges

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dependencies
opened by dependabot[bot] 0