aoc2021
OffsetArrays.jl
| aoc2021 | OffsetArrays.jl | |
|---|---|---|
| 3 | 7 | |
| 0 | 192 | |
| - | 1.0% | |
| 1.8 | 6.1 | |
| over 2 years ago | 27 days ago | |
| Rust | Julia | |
| - | GNU General Public License v3.0 or later |
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aoc2021
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-🎄- 2021 Day 6 Solutions -🎄-
Very similar to mine, I used .rotate(1) on my ages array then added the element at the end to the element at index 6. https://github.com/MichaelCG8/aoc2021/blob/main/src/bin/06.rs
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Code review AoC Day 4
Also, instead of summing the remaining values at the end I summed them all at the start then subtracted them as they were checked off, meaning that i didn't need to store a Boolean for each entry recording whether it remained. https://github.com/MichaelCG8/aoc2021/blob/main/src/bin/04.rs
OffsetArrays.jl
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Why I am switching my programming language to 1-based array indexing.
Well, there is OffsetArrays in Julia, but it has acquired a reputation as a poison pill because most code assumes the 1-based indexing and it's easy to forget to convert the indexing and screw up the code.
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The Julia language has a number of correctness flaws
Similar correctness issues are a big part of the reason that, several years ago, I submitted a series of pull requests to Julia so that its entire test suite would run without memory errors under Valgrind, save for a few that either (i) we understood and wrote suppressions for, or (ii) we did not understand and had open issues for. Unfortunately, no one ever integrated Valgrind into the CI system, so the test suite no longer fully runs under it, last time I checked. (The test suite took nearly a day to run under Valgrind on a fast desktop machine when it worked, so is infeasible for every pull request, but could be done periodically, e.g. once every few days.)
Even a revived effort on getting core Julia tests to pass under Valgrind would not do much to help catch correctness bugs due to composing different packages in the ecosystem. For that, running in testing with `--check-bounds=yes` is probably a better solution, and much quicker to execute as well. (see e.g. https://github.com/JuliaArrays/OffsetArrays.jl/issues/282)
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-🎄- 2021 Day 6 Solutions -🎄-
You might be interested in OffsetArrays.jl.
- PyTorch: Where we are headed and why it looks a lot like Julia (but not exactly)
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Why does Julia adopt 1-based index?
Counting starts at one, as do most vector/matrix/tensor indices. If it bothers you too much, see OffsetArrays.jl and Arrays with custom indices.
- some may hate it, some may love it
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Evcxr: A Rust REPL and Jupyter Kernel
No need for another version, Julia supports custom indices by default. Check out https://docs.julialang.org/en/v1/devdocs/offset-arrays/ and https://github.com/JuliaArrays/OffsetArrays.jl
What are some alternatives?
fish-shell - The user-friendly command line shell.
StarWarsArrays.jl - Arrays indexed as the order of Star Wars movies
Advent-of-Code - Advent of Code
TwoBasedIndexing.jl - Two-based indexing
adventofcode-solutions - 🎄 My solutions to https://adventofcode.com/
Optimization.jl - Mathematical Optimization in Julia. Local, global, gradient-based and derivative-free. Linear, Quadratic, Convex, Mixed-Integer, and Nonlinear Optimization in one simple, fast, and differentiable interface.
AoC - my personal repo for the advent of code yearly challenge
TailRec.jl - A tail recursion optimization macro for julia.
adventofcode - Solutions for problems from AdventOfCode.com
julia - The Julia Programming Language
Advent_of_Code - My Advent of Code solutions.
StatsBase.jl - Basic statistics for Julia