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everyone who/whom 7 legs of love :marseyspider:  21hr ago (text post) Edited 20hr ago 409 thread views #321970
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rDrama Advent of Code Day 1: Warm up

I hope this fine morning finds you well, saars.

The word of the day is collections.Counter

The rdrama leaderboard invite code is 632268-30587026

I created the ping group: !AOC, I'm sure it will be useful offseason too.

Charts! https://github.com/jeroenheijmans/advent-of-code-charts

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#AOC 1. des 1
column1 =[]
column2 =[]

theData = open("Datasets/ids1.12")
theData = theData.readlines()

for line in theData:
  parts = line.split()
  column1.append(int(parts[0]))
  column2.append(int(parts[1]))

column1.sort()
column2.sort()

distance = 0

for i in range(len(column1)):
  distance += abs(column1[i] - column2[i])
print(distance)

Every time I have to use loops I feel like shit, because that is where you get performance bottlenecks. But then I realized I don't have to submit any actual code and just did what came most natural. I am not comfortable with Python and have to relearn shit every time I use it.

#AOC 1. des 2
column1 =[]
column2 =[]

theData = open("Datasets/ids1.12")
theData = theData.readlines()

for line in theData:
  parts = line.split()
  column1.append(int(parts[0]))
  column2.append(int(parts[1]))

column2Dict = {}

for i in column2:
  column2Dict.update({i: 0})

for i in column2:
  column2Dict[i] = column2Dict[i] + 1

simScore = 0

for i in column1:
  if i not in column2Dict:
    continue
  simScore += (i * column2Dict[i])

print(simScore)

The scoring on this seems a little sleep-phobic, not gonna lie. This solution is a little ungabunga, I think I could have avoided one loop if I knew how to python better.

:#marseydisintegrate: :!#marseyflamewar::space::!marseyagree:

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dict has get and setdefault methods that deal with nonexistent keys in a streamlined fashion. So column2Dict[i] = column2Dict.get(i, 0) + 1 would work. Even better, use collections.Counter which does all that for you, see my code in a comment here.

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If you really care,

distance = 0
for i in range(len(column1)):
  distance += abs(column1[i] - column2[i])

could be

distance = sum(abs(column1[i] - column2[i]) for i in range(len(column1)))

or

distance = sum(abs(x - y) for x, y in zip(column1, column2))

but in principle they're all for loops. Whatever obscure performance benefits one syntax might offer isn't worth worrying about. Readability is king in python.

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Every time I have to use loops I feel like shit, because that is where you get performance bottlenecks. But then I realized I don't have to submit any actual code and just did what came most natural. I am not comfortable with Python and have to relearn shit every time I use it.

Read other people's code and learn from it. Python is a remarkably nice language, pretty much every time you feel like shit for writing verbose code, that's a red flag telling you that there's a way to write it five times shorter and more to the point.

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I am not comfortable with Python and have to relearn shit every time I use it.

Then dont do it :marseyconfused:

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I'm like this but for every language I use. I assumed this was just part of the Process?

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Oh ok I thought you had some hangup on python specifically

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I'm not the person in the picture.

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