https://github.com/failedcode/adventofcode-2018

http://adventofcode.com/2018
https://github.com/failedcode/adventofcode-2018

advent-of-code advent-of-code-2018 fun

Last synced: 22 days ago
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http://adventofcode.com/2018

• Host: GitHub
• URL: https://github.com/failedcode/adventofcode-2018
• Owner: FailedCode
• License: unlicense
• Created: 2018-12-01T13:36:48.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2018-12-19T21:43:15.000Z (over 7 years ago)
• Last Synced: 2025-01-11T04:35:15.280Z (over 1 year ago)
• Topics: advent-of-code, advent-of-code-2018, fun
• Language: PHP
• Homepage:
• Size: 186 KB
• Stars: 3
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Advent of Code 2018

http://adventofcode.com/2018

Solutions with PHP 7.2

## Features

  * Download Input of the day

    * Doesn't override already existing files!

  * Test mode

    * Tweak the Puzzle code while making sure the solution doesn't get lost

## Install

`composer install`

[composer???](https://getcomposer.org/doc/00-intro.md)

In case you do not have curl installed:

`sudo apt-get install php-curl`

In case you do not have curl installed:

`sudo apt-get install php-xml`

Copy the .env.dist file

`cp .env.dist .env`

Insert your SESSION cookie for automated download of your personal puzzle input. 

Copy the testvalues.php.dist file

`cp Days/testvalues.php.dist Days/testvalues.php`

testvalues.php ist used for refactoring. Known puzzle solutions are tested against to tell if a change broke the code.

## Run

`./runDay.php 1`

Run a day.

`./runDay.php 1 2 3`

Runs multiple days.

`./runDay.php 2p2`

Runs only the second part of day 2.

`./runDay.php 2 --test`

Tests, if the results for day 2 changed.

`./runDay.php 2 --psr2-check`

Check code for PSR-2 violations

## Resources

  * [PHP Changes](http://php.net/manual/en/appendices.php)

    * [New PHP 7.0 Features](http://php.net/manual/en/migration70.new-features.php)

    * [New PHP 7.1 Features](http://php.net/manual/en/migration71.new-features.php)

    * [New PHP 7.2 Features](http://php.net/manual/en/migration72.new-features.php)

  * You might like "Modern PHP" by Josh Lockhart 

  * Day 11: [Summed-area table](https://en.wikipedia.org/wiki/Summed-area_table)

    * The first brute force approach took 40 minutes

    * Building and using an lookup table reduced the time down to 2.37 seconds