J for C Programmers by Henry Rich is now in ChapterPal's collection of books offered free of charge. The J programming language is a highly terse, multi-platform array programming language developed in the early 1990s.
Key points
J for C Programmers by Henry Rich added to ChapterPal’s free book collection.
J is a highly terse, multi-platform array language developed in the early 1990s.
Sources
A Little R Survival Kit added to ChapterPal open textbooks collection
A Little R Survival Kit by Eric Ho (2026) is now in ChapterPal's collection of open textbooks. The book covers R, an open-source language for statistical computing and data analysis.
Key points
Title: A Little R Survival Kit by Eric Ho (2026)
Collection: ChapterPal's open textbooks collection
Sources
Agent memory released by seven firms in one month
Agent memory released by Meta, Google, Microsoft, Databricks, Couchbase, Cohere, and GitHub in the past month. The post asks whether memories transfer when switching platforms.
Key points
Companies: Meta, Google, Microsoft, Databricks, Couchbase, Cohere, GitHub.
Timeline: shipped in the last month.
Sources
J Primer added to ChapterPal collection of open textbooks
J Primer by Eric Iverson is now in ChapterPal's collection of open textbooks. The J language is a terse, general-purpose array language created in the early 1990s by Kenneth E. Iverson and Roger Hui.
Key points
J Primer by Eric Iverson added to ChapterPal's open textbook collection
J language developed in the early 1990s by Kenneth E. Iverson and Roger Hui
Sources
Board game numbers boost preschool number skills, held 9 weeks
Board game numbers boost preschool number skills, with four skills improving and maintained 9 weeks later. Replacing numbers with colored squares showed no gain.
Key points
Four number skills increased after about an hour of play and held 9 weeks later.
Using colored squares instead of numbers produced no gain.
Sources
AutoAlign open-sourced by NVIDIA, no benchmarks shipped
AutoAlign is an NVIDIA open-source tool to catch confident wrong answers in enterprise AI, released without any benchmark. Correctness is described as domain-specific, so proof must live in the user’s environment, not on a leaderboard.
Key points
AutoAlign open-sourced by NVIDIA.
Shipped without a single benchmark.
