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https://github.com/nulldev/advent-of-code
:christmas_tree: My solutions for the Advent of Code in NodeJS
https://github.com/nulldev/advent-of-code
advent advent-of-code advent-of-code-2019 advent-of-code-2020 advent-of-code-2021 advent-of-code-2022 advent-of-code-2023 adventofcode javascript js nodejs nulldev solutions
Last synced: about 2 months ago
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:christmas_tree: My solutions for the Advent of Code in NodeJS
- Host: GitHub
- URL: https://github.com/nulldev/advent-of-code
- Owner: NullDev
- License: mit
- Created: 2020-12-02T11:22:37.000Z (about 4 years ago)
- Default Branch: master
- Last Pushed: 2024-10-14T18:37:19.000Z (3 months ago)
- Last Synced: 2024-10-31T08:37:26.132Z (2 months ago)
- Topics: advent, advent-of-code, advent-of-code-2019, advent-of-code-2020, advent-of-code-2021, advent-of-code-2022, advent-of-code-2023, adventofcode, javascript, js, nodejs, nulldev, solutions
- Language: JavaScript
- Homepage: https://adventofcode.com/
- Size: 1.22 MB
- Stars: 12
- Watchers: 1
- Forks: 5
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# :christmas_tree: Advent-of-Code
My solutions for the Advent of Code in NodeJS
## :information_source: About Advent of Code
Each day consists of two puzzles.
I added a README.md file to each Day, which contains the instructions exactly as they were displayed on https://adventofcode.com/
## :bulb: How to use this repository
### :wrench: Initial Setup
0. Open up your favourite terminal (and navigate somewhere you want to download the repository to).
1. Make sure you have NodeJS installed. Test by entering
$ `node -v`
If this returns a version number, NodeJS is installed. **If not**, get NodeJS here.
2. Clone the repository and navigate to it.
$ `git clone https://github.com/NullDev/Advent-of-Code.git && cd Advent-of-Code`
3. Check out the template branch in your fork from my remote. (IF YOU SEE THIS: YOU ARE ON THE **WRONG** BRANCH)
$ `git checkout -b template origin/template`
4. Push your newly created branch and make sure to set it as your default branch on GitHub (`REPO/settings/branches`).
5. Install all dependencies by typing
$ `npm install`
6. Remove all years that weren't made by you (if all: `rm -r "./20*"`) and maybe alter the README
7. Copy `config.template.json` and paste it as `config.json`
8. Go to https://adventofcode.com/ and login with your account. Then copy the value from the `session` cookie and paste it into the `config.json` file (See [here](https://www.cookieyes.com/blog/how-to-check-cookies-on-your-website-manually/) if you don't know how).
9. (OPTIONAL) If you wish to use the GitHub Action for the "Prepare Day automatically at 0:10 workflow" you need to go to your repository settings -> secrets -> actions and add `SESSION_COOKIE` with your session string.
### :sunny: Starting a new day
- To automatically setup and prepare the current day, simply type `npm run prepare-today`
- If you finished part one and want to get the readme updated, simple run the command again.
- Optionally, to prepare a previous day, type `node prepare_day.js YEAR-DAY`- Example: `node prepare_day.js 2020-12`
Both of those commands will create a folder for the day/year, fetch the task from the website & convert it to a README.md, fetch the input and create template files for the solution.
### :rocket: Running benchmarks
Each script can be run stand-alone / separatly but I've also created a `start_all.js` script to launch all days in order, and display the solutions along with an approximated benchmark (the benchmark uses [`performance.now()`](https://nodejs.org/api/perf_hooks.html#perf_hooks_performance_now) to measure the execution time and **does not include the actual reading of the file** except when the file is read line-by-line).
- Run all years: `npm run start:all`
- Run a specific year: `npm run start:YEAR`- Example: `npm run start:2020`
- Run a specific year and day: `npm run start:YEAR DAY`- Example: `npm run start:2020 3`
- Run todays parts: `npm run start:today`
- Run a specific day & part: `node YEAR/DAY/part_[1 OR 2].js`- Example: `node 2020/01/part_2.js`
## :scroll: License
- All Puzzles & Inputs (`Day_XX/README.md`'s and `Day_XX/input.txt`'s) Copyright (c) Eric Wastl ([@ericwastl](https://twitter.com/ericwastl))
- All Puzzle Solutions[^1] (`Day_XX/part_1.js`'s and `Day_XX/part_2.js`'s) Copyright (c) NullDev ([nulldev.org](https://nulldev.org))
[^1]: Unless otherwise noted in the Code
## :trophy: Goal
I attempted to solve every problem as functional as possible and with as little code as possible while still being performant.
Some solutions could be one-liners but I left them splitted up for the sake of readability.
I also tried to experiment with a couple of different things:
- Single-Liner in [Day_01/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2019/Day_01/part_1.js)
- Single-Liner on Day 04 in both [part_1](https://github.com/NullDev/Advent-of-Code/blob/master/2019/Day_04/part_1.js) and [part_2](https://github.com/NullDev/Advent-of-Code/blob/master/2019/Day_04/part_2.js)
- Solution with logical XOR-ing in [Day_02/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_02/part_2.js)
- Theoretical single-liner (single chain function) in [Day_04/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_04/part_1.js)
- Completely branchless approach in [Day_04/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_04/part_2.js)
- Another theoretical single-liner in [Day_06/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_06/part_1.js) and [Day_06/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_06/part_2.js)
- Recursive curried function in [Day_07/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_07/part_1.js)
- Another theoretical one-liner in [Day_10/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_10/part_1.js)
- More branchless solutions in [Day_12/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_12/part_1.js) and [Day_12/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_12/part_2.js)
- Yet another single-liner in [Day_13/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_13/part_1.js)
- Experiment with bit-shift, bitwise operations and bigint numbers in [Day_14/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_14/part_2.js)
- Another theoretical one-liner in [Day_16/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_16/part_1.js)
- Recursive [IIFE](https://developer.mozilla.org/en-US/docs/Glossary/IIFE) arrow function to minimize code in [Day_17/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_17/part_1.js)
- Theoretical one-liner by utilizing the [Lambda calculus Y-combinator](https://en.wikipedia.org/wiki/Fixed-point_combinator#Fixed-point_combinators_in_lambda_calculus) with an [recursive anonymous arrow function](http://kestas.kuliukas.com/YCombinatorExplained/) in [Day_18/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_18/part_1.js)
- Theoretical (_almost_) one-liner in [Day_20/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_20/part_1.js)
- The final one-liner in [Day_25/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2020/Day_25/part_1.js)
- Single-Liner on Day 01 in both [part_1](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_01/part_1.js) and [part_2](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_01/part_2.js)
- Solution in `O(n)` on Day 06 in both [part_1](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_06/part_1.js) and [part_2](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_06/part_2.js) (See the [Note](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_06/part_1.js#L16-L33))
- Single-Liner on Day 07 in both [part_1](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_07/part_1.js) and [part_2](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_07/part_2.js) by using a [formula transformation](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_07/part_2.js#L18-L21)
- Single-Liner in [Day_08/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_08/part_1.js)
- Another Single-Liner in [Day_09/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_09/part_1.js)
- Theoretical (almost) Single-Liner in [Day_10/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_10/part_2.js)
- Single-Liner in [Day_13/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_13/part_1.js)
- Single-Liner in [Day_17/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_17/part_1.js)
- Singe-Liner in [Day_21/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_21/part_1.js)
- Recursive IIFE in [Day_21/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_21/part_2.js)
- Single-Liners & IIFE's on Day 22 in both [part_1](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_22/part_1.js) and [part_2](https://github.com/NullDev/Advent-of-Code/blob/master/2021/Day_22/part_2.js)
- Pretty straight forward one-liners in both [Day_01/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2022/Day_01/part_1.js) and [Day_01/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2022/Day_01/part_2.js)
- Another one-liner in both [Day_04/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2022/Day_04/part_1.js) and [Day_04/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2022/Day_04/part_2.js)
- Yet another one-line solution in both [Day_06/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2022/Day_06/part_1.js) and [Day_06/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2022/Day_06/part_2.js)
- One-Liner in [Day_01/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_01/part_1.js)
- One-Liner in both [Day_02/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_02/part_1.js) and [Day_02/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_02/part_2.js)
- One-Liner in both [Day_04/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_04/part_1.js) and [Day_04/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_04/part_2.js)
- One-Liner in [Day_06/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_06/part_1.js)
- One-Liner in both [Day_11/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_11/part_1.js) and [Day_11/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_11/part_2.js)
- One-Liner in both [Day_12/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_12/part_1.js) and [Day_12/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_12/part_2.js)
- One-Liner in both [Day_13/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_13/part_1.js) and [Day_13/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_13/part_2.js) - both using Binary Matrices
- One-Liner in [Day_14/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_14/part_1.js)
- One-Liner in both [Day_15/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_15/part_1.js) and [Day_15/part_2.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_15/part_2.js)
- One-Liner in [Day_24/part_1.js](https://github.com/NullDev/Advent-of-Code/blob/master/2023/Day_24/part_1.js)
## :rocket: Benchmarks Preview
## :star: Yay
