Hacker News for Jul 21, 2025

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Today's topics:
-Dynamic Programming: Meaning and History
-Gentoo Perl Versioning Explained
-Daily Life of Medieval Kings
-Quadratic Forms in Modern Math
-Samsung's Peltier Cooling Innovation
-Best Practices in Software Logging
-Extend's NYC Job Openings
-XSLT's Enduring Enterprise Role
-The Sumerian Game's Legacy
-Expanding Human Color Perception

-https://www.vidarholen.net/contents/blog/
-https://wiki.gentoo.org/wiki/Project:Perl/Version-Scheme
-https://www.medievalists.net/2025/07/medieval-king-daily-life/
-https://www.ams.org/journals/notices/202507/noti3192/noti3192.html
-https://news.samsung.com/global/interview-staying-cool-without-refrigerants-how-samsung-is-pioneering-next-generation-peltier-cooling
-https://johnscolaro.xyz/blog/log-by-time-not-by-count
-https://jobs.ashbyhq.com/extend
-https://www.xml.com/articles/2025/07/19/xslt-precision-tool-future-structured-transformation/
-https://spillhistorie.no/2025/07/10/the-sumerian-game-the-ancestor-of-modern-city-builders/
-https://dynomight.net/colors/


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