October 2025
Intermediate to advanced
292 pages
9h 36m
French
Content preview from IA durable
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Chapitre 9. Une recette pour une IA durable
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Dans les années 1990, de nombreux systèmes stockaient les dates en utilisant deux chiffres pour l'année - "97" pour 1997, "99" pour 1999, et ainsi de suite - afin d'économiser de la mémoire et de simplifier la manipulation des chaînes de caractères. Cela a bien fonctionné jusqu'à l'approche de l'an 2000. Soudain, "00" pouvait signifier 1900 ou 2000, et d'innombrables systèmes risquaient de mal fonctionner ou de tomber en panne parce qu'ils ne pouvaient pas désambiguïser le siècle. C'est ce qui a conduit à la frénésie mondiale connue sous le nom de bogue de l'an 2000 sur le site.1
Dans la hâte de corriger les systèmes avant le passage au nouveau millénaire, les développeurs ont eu recours à diverses solutions palliatives. L'un d'entre eux consistait à ajouter un indicateur de "conformité au passage à l'an 2000" ou à définir des règles arbitraires pour interpréter les dates, par exemple en supposant que toute année inférieure à 20 signifie 2000-2019, et que toute année 20 ou supérieure signifie 1920-1999. Le code pouvait ressembler à ceci :
definterpret_year(year):ifyear<20:return2000+yearelse:return1900+year
Et à côté, les développeurs écrivaient souvent des commentaires du genre :
# Temporary Y2K fix. Remove by 2010.Bien sûr, 2010 est venu et est parti, mais le code est resté. Personne ne savait ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.