AOC2022

My personal attempts at the 2022 Advent of Code https://adventofcode.com/2022

Each day is in a two-digit day numbered folder

The *.py file is my code

advent-of-code-data

https://pypi.org/project/advent-of-code-data/

A slick way to download the puzzle data and submit answers

AOC Journal

Day 08

numpy!

• 11 Dec, still lagging
• Things I re-learned
  • numpy indexing
• Things I learned -np.genfromtxt

Day 07

PurePosixPath!

• 11 Dec, lagging a lot
• /jssbn/lfrctthp/lfrctthp/ WHHYYYY!?!?!
• Thanks to Rainow CSV VS Code Extension for enabling a rapid exploration of the dataset, although a momentary panic that LIKE wasn't supported was alleviated by the existence of like(col, str)
• Things I re-learned
  • If you don't update the value of a loop variable, it's not helpful
  • When concatenating strings with + you have to str() integers
  • collections.defaultdict is awesome
  • EXPLORE YOUR DATASET
• Things I learned
  • pathlib.PurePosixPath can be used to keep track of directories even if there's no actual file system!

Day 06

Counter!

• 08 Dec, still lagging
• Things I re-learned
  • Can't chain list.append() with list.pop() because they both return None
• Things I learned
  • Counter.most_common()

Day 05

Transposed Lists!

• 07 Dec, still lagging
• Things I re-learned
  • inplace list operations
• Things I learned
  • itertools.groupby()

Day 04

Sorted Lists! Mapped Tuples!

• 06 Dec, still lagging
• Got aocd working on Ubuntu
• Things I re-learned
  • sorted() for lists
  • list.count()
• Things I learned
  • (tuple(map(operator.sub,tups[0],tups[1]))) subtracts corresponding elements in a pair of tuples!

Day 03

Sets!

• 05 Dec, still lagging
• Didn't get around to debugging aocd
• Things I re-learned
  • set.intersection()
  • string.isupper()
• Things I learned
  • reduce(lambda x,y: set(x)&set(y), list_of_strings)

Day 02

Dictionaries!

• Doubling up, 04 Dec
• Things I re-learned
  • advent-of-code-data is a thing!
  • Must get your AOC session token
• urllib3.exceptions.SSLError: Can't connect to HTTPS URL because the SSL module is not available

Day 01

Lists!

• Started late, 04 Dec
• Things I re-learned
  • from pathlib import Path
  • p = Path(__file__).with_name(n)
  • with p.open() as f: txt = f.read().splitlines()
  • To add items to a list, list.append() for a non-iterable, list.extend() for items in an iterable
• Things I learned
  • You can use None in a variable when setting a stop slice index!