J Primer by Eric Iverson is now in @ChapterPal's collection of open textbooks.
This is a dev post classified by AGK Intelligence as Languages & runtimes (a free resource), kept by the Dev Radar because it carries real work, not commentary.
J Primer by Eric Iverson is now in @ChapterPal's collection of open textbooks. The J programming language is a highly terse, general-purpose array programming language developed in the early 1990s by Kenneth E. Iverson (the creator of APL) and Roger Hui. It is designed primarily for mathematical, statistical, and logical data analysis, making it exceptionally powerful for handling matrices and large-scale datasets. ChapterPal has two versions of the book to choose from: the author's original version (2011, partially revised in 2023) and an updated and corrected version from ChapterPal (2026
Posted by BURKOV (59.8k followers) 1 h ago · 3 likes · 483 views · view the original post on X. Kept by the Dev Radar as Languages & runtimes.
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