Jean Tessier
@jeantessier.com
Software craftsman from Silicon Valley
I just completed "Movie Theater" - Day 9 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/9
See my #Ruby solution at github.com/jeantessier/...
Took me longer than it should have, and I had to pull out RSpec to track my progress with unit tests.
See my #Ruby solution at github.com/jeantessier/...
Took me longer than it should have, and I had to pull out RSpec to track my progress with unit tests.
Day 9 - Advent of Code 2025
adventofcode.com
December 9, 2025 at 8:09 AM
I just completed "Movie Theater" - Day 9 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/9
See my #Ruby solution at github.com/jeantessier/...
Took me longer than it should have, and I had to pull out RSpec to track my progress with unit tests.
See my #Ruby solution at github.com/jeantessier/...
Took me longer than it should have, and I had to pull out RSpec to track my progress with unit tests.
I just completed "Playground" - Day 8 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/8
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 8 - Advent of Code 2025
adventofcode.com
December 8, 2025 at 6:04 AM
I just completed "Playground" - Day 8 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/8
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Laboratories" - Day 7 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/7
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 7 - Advent of Code 2025
adventofcode.com
December 7, 2025 at 6:45 AM
I just completed "Laboratories" - Day 7 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/7
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Trash Compactor" - Day 6 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/6
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 6 - Advent of Code 2025
adventofcode.com
December 6, 2025 at 6:17 AM
I just completed "Trash Compactor" - Day 6 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/6
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Cafeteria" - Day 5 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/5
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 5 - Advent of Code 2025
adventofcode.com
December 5, 2025 at 6:15 AM
I just completed "Cafeteria" - Day 5 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/5
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Printing Department" - Day 4 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/4
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 4 - Advent of Code 2025
adventofcode.com
December 4, 2025 at 5:58 AM
I just completed "Printing Department" - Day 4 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/4
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Lobby" - Day 3 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/3
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 3 - Advent of Code 2025
adventofcode.com
December 3, 2025 at 6:51 AM
I just completed "Lobby" - Day 3 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/3
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Gift Shop" - Day 2 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/2
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 2 - Advent of Code 2025
adventofcode.com
December 2, 2025 at 6:24 AM
I just completed "Gift Shop" - Day 2 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/2
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I've completed "Secret Entrance" - Day 1 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/1
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 1 - Advent of Code 2025
adventofcode.com
December 1, 2025 at 8:23 AM
I've completed "Secret Entrance" - Day 1 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/1
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Reposted by Jean Tessier
It's here! "We Just Build Hammers: Stories from the Past, Present, and Future of Responsible Tech" brings to life tales of the unsung heroes of responsible tech and the science fiction that inspired them.
thehammerbook.com
#TechJustice #EthicalSource #ResponsibleTech #TechEthics #TheFutureIsSoft
thehammerbook.com
#TechJustice #EthicalSource #ResponsibleTech #TechEthics #TheFutureIsSoft
We Just Build Hammers: A New Book by Coraline Ada Ehmke
Stories of visionaries from the past, present, & future of responsible tech, and the science fiction that inspired them. Available now from Apress.
thehammerbook.com
March 4, 2025 at 7:19 PM
It's here! "We Just Build Hammers: Stories from the Past, Present, and Future of Responsible Tech" brings to life tales of the unsung heroes of responsible tech and the science fiction that inspired them.
thehammerbook.com
#TechJustice #EthicalSource #ResponsibleTech #TechEthics #TheFutureIsSoft
thehammerbook.com
#TechJustice #EthicalSource #ResponsibleTech #TechEthics #TheFutureIsSoft
Reposted by Jean Tessier
Bon, a priori, les gens seraient intéressés par le fonctionnement général d'un lave-vaisselle, et pourquoi je dis que personne ne sait s'en servir correctement.
Un cadeau de Noël de ma part, tout ce que vous avez toujours voulu savoir sur ce chef-d'œuvre de la technologie.
1/43
Un cadeau de Noël de ma part, tout ce que vous avez toujours voulu savoir sur ce chef-d'œuvre de la technologie.
1/43
December 25, 2024 at 9:06 AM
Bon, a priori, les gens seraient intéressés par le fonctionnement général d'un lave-vaisselle, et pourquoi je dis que personne ne sait s'en servir correctement.
Un cadeau de Noël de ma part, tout ce que vous avez toujours voulu savoir sur ce chef-d'œuvre de la technologie.
1/43
Un cadeau de Noël de ma part, tout ce que vous avez toujours voulu savoir sur ce chef-d'œuvre de la technologie.
1/43
I just completed all 25 days of Advent of Code 2024! #AdventOfCode adventofcode.com
See my #Ruby solutions at github.com/jeantessier/...
See my #Ruby solutions at github.com/jeantessier/...
Advent of Code 2024
adventofcode.com
December 25, 2024 at 6:36 AM
I just completed all 25 days of Advent of Code 2024! #AdventOfCode adventofcode.com
See my #Ruby solutions at github.com/jeantessier/...
See my #Ruby solutions at github.com/jeantessier/...
I just completed "Crossed Wires" - Day 24 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/24
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 24 - Advent of Code 2024
adventofcode.com
December 25, 2024 at 5:35 AM
I just completed "Crossed Wires" - Day 24 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/24
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Keypad Conundrum" - Day 21 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/21
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 21 - Advent of Code 2024
adventofcode.com
December 23, 2024 at 8:20 PM
I just completed "Keypad Conundrum" - Day 21 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/21
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "LAN Party" - Day 23 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/23
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 23 - Advent of Code 2024
adventofcode.com
December 23, 2024 at 8:40 AM
I just completed "LAN Party" - Day 23 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/23
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Monkey Market" - Day 22 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/22
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 22 - Advent of Code 2024
adventofcode.com
December 23, 2024 at 3:13 AM
I just completed "Monkey Market" - Day 22 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/22
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Reposted by Jean Tessier
How hard should you work to retain employees who hint at leaving?
In @mipsytipsy.bsky.social's latest blog, she shares her perspective on the employer-employee relationship, with some honest truths along the way. Check it out below 👇
charity.wtf/2024/10/11/h...
In @mipsytipsy.bsky.social's latest blog, she shares her perspective on the employer-employee relationship, with some honest truths along the way. Check it out below 👇
charity.wtf/2024/10/11/h...
How Hard Should Your Employer Work To Retain You?
Recently we learned that Google spent $2.7 billion to re-hire a single AI researcher who had left to start his own company. As Charlie Brown would say: “Good grief.” 🙄 This is an (incredibly!) extr…
charity.wtf
December 18, 2024 at 8:54 PM
How hard should you work to retain employees who hint at leaving?
In @mipsytipsy.bsky.social's latest blog, she shares her perspective on the employer-employee relationship, with some honest truths along the way. Check it out below 👇
charity.wtf/2024/10/11/h...
In @mipsytipsy.bsky.social's latest blog, she shares her perspective on the employer-employee relationship, with some honest truths along the way. Check it out below 👇
charity.wtf/2024/10/11/h...
I just completed "Race Condition" - Day 20 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/20
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 20 - Advent of Code 2024
adventofcode.com
December 20, 2024 at 10:26 AM
I just completed "Race Condition" - Day 20 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/20
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Reposted by Jean Tessier
I (finally) wrote up my thoughts on "Founder Mode" and the Brian Chesky morality tale about how he turned around Airbnb company culture.
This has made it into the Silicon Valley water table; it must be dealt with. There are some good nuggets within; let's dig them out.
charity.wtf/2024/12/17/f...
This has made it into the Silicon Valley water table; it must be dealt with. There are some good nuggets within; let's dig them out.
charity.wtf/2024/12/17/f...
“Founder Mode” and the Art of Mythmaking
I’ve never been good at “hot takes”. Anyone who knows anything about marketing can tell you that the best time to share your opinion about something is when everyone is all worked up about it. Hot …
charity.wtf
December 17, 2024 at 5:56 PM
I (finally) wrote up my thoughts on "Founder Mode" and the Brian Chesky morality tale about how he turned around Airbnb company culture.
This has made it into the Silicon Valley water table; it must be dealt with. There are some good nuggets within; let's dig them out.
charity.wtf/2024/12/17/f...
This has made it into the Silicon Valley water table; it must be dealt with. There are some good nuggets within; let's dig them out.
charity.wtf/2024/12/17/f...
I just completed "Linen Layout" - Day 19 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/19
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 19 - Advent of Code 2024
adventofcode.com
December 19, 2024 at 5:57 AM
I just completed "Linen Layout" - Day 19 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/19
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Chronospatial Computer" - Day 17 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/17
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 17 - Advent of Code 2024
adventofcode.com
December 19, 2024 at 12:27 AM
I just completed "Chronospatial Computer" - Day 17 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/17
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "RAM Run" - Day 18 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/18
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 18 - Advent of Code 2024
adventofcode.com
December 18, 2024 at 7:35 AM
I just completed "RAM Run" - Day 18 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/18
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Reindeer Maze" - Day 16 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/16
See my #Ruby solution at github.com/jeantessier/...
I couldn't get Part 2 to compute correctly and I had to make some visual observations to arrive at the correct answer.
See my #Ruby solution at github.com/jeantessier/...
I couldn't get Part 2 to compute correctly and I had to make some visual observations to arrive at the correct answer.
Day 16 - Advent of Code 2024
adventofcode.com
December 16, 2024 at 10:57 PM
I just completed "Reindeer Maze" - Day 16 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/16
See my #Ruby solution at github.com/jeantessier/...
I couldn't get Part 2 to compute correctly and I had to make some visual observations to arrive at the correct answer.
See my #Ruby solution at github.com/jeantessier/...
I couldn't get Part 2 to compute correctly and I had to make some visual observations to arrive at the correct answer.
I just completed "Warehouse Woes" - Day 15 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/15
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 15 - Advent of Code 2024
adventofcode.com
December 15, 2024 at 8:04 AM
I just completed "Warehouse Woes" - Day 15 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/15
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
I just completed "Restroom Redoubt" - Day 14 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/14
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...
Day 14 - Advent of Code 2024
adventofcode.com
December 14, 2024 at 7:15 AM
I just completed "Restroom Redoubt" - Day 14 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/14
See my #Ruby solution at github.com/jeantessier/...
See my #Ruby solution at github.com/jeantessier/...