Advent of Code 2020 - BaseA Style (Day 4)

[Jean-Balteryx]

Discussion thread for day 4 of the Advent of Code : https://adventofcode.com/2020/day/4

[Greg_Murray]

This was a fun one! Nothing like a little regex in the evening. 

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[jdunkerley79]

Love the smell of RegEx in the morning...

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Decided to go for pure Regex validation - no tonumber-ings

[AkimasaKajitani]

My solution at Day04.

Using simple ToNumber function(Off course using RegEx_Match).

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As anonymous user #1105310

[Jean-Balteryx]

Day 4 solution. Not that much Regex but one big filter for part 2 !

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[cgoodman3]

Day 4 - Tried to do it with no regex, but used a regexcount matches as I didn't write out a really long 

substring([Field_1],2,1) IN ("0","1","2"..."a","b","c"...) for validating the hair colour.

Also the many filters helped finding the typo much easier than trying to next it to bring the overall tool count down.

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[davas]

Managed to get the right answers but it's clear i need to brush up on my regex syntax 😀

It's really great looking through how different people solve things! 

[danilang]

Regex is definitely the way to go here.  Kudo's to @cgoodman3 for trying to solve it without using the regex hammer.  

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Dan

[NedHarding]

Day 4 was interesting and very well suited to Alteryx.  Actually probably easier in Alteryx than in a normal programming language.

If anyone wants my solutions, I put them here:  https://github.com/NedHarding/Advent2020

[Aguisande]

My Day 4..

Going in "basic user" mode... 

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BTW... I'd love to see those Regex Expressions you (all) used later...