hubertf's NetBSD Blog
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[20050901] New algorithm for learning languages
Totally unrelated to NetBSD, but IMHO still _very_ exciting: ``Cornell University and Tel Aviv University researchers have developed a method for enabling a computer program to scan text in any of a number of languages, including English and Chinese, and autonomously and without previous information infer the underlying rules of grammar. The rules can then be used to generate new and meaningful sentences. The method also works for such data as sheet music or protein sequences.'' [scienceblog article]. More information can be found on The ADIOS project's homepage and the author Zach Solan's homepage.

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[20050729] Reversing a file line-by-line (Update #2)
I've been searching for a tool to reverse the contents of a file line-by line (i.e. print last line first, etc.) for some time, and found by accident that NetBSD's "tail -r" can do that. Whee! (Pity that's non in SUSv3)

Update: Julien Gabel pointed me at an article "Eight Ways to Reverse a File". I knew GNU's 'tac' was there, and all the other options use some other tools (perl, vi, sed, etc.). Now I find it funny that the solution I used before I knew "tail -r" isn't listed there: cat -n file | sort -rn | some sed stuff to get rid off the line numbers.

Update #2: Martin Neitzel pointed me at another, imho very cute way to solve the problem with an ed/ex command, following the basic idea of marking every line, and then moving it to the beginning. Here's how to do it in vi (load any file first): g/./m0 or g/^/m0. Simple, hu? And doesn't need another tool installed. :)

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[20050728] Knowledge FileSystem for NetBSD
``Knowledge FileSystem for NetBSD is an intelligent and auto-sorting filesystem developed as a final year project by me, Kailash Sethuraman, for Nanyang Technological University. It is more of a framework than a conventional filesystem. The purpose of the filesystem is to allow the actions of every VFS operation to be controlled by plugins in userspace, to provide an intelligent filesystem which can automatically sort and in the future, search your data. [...]

[After mounting knowfs], all VOP_RENAMEs to the smart folder will be intercepted by KFS. The use of the mv program to drop files into the smart folder will result in the data getting sorted automatically. For example one can just state that all pdfs go into a pdf/ folder, and all mp3s are to be parsed by a mp3.s script. A drag and drop into this folder, will cause the action to be taken on the file. '' See the homepage for a lot more data and nice graphs. Reminds me a bit of the NetBSD/Summer-of-Code "userfs" project, but I may be wrong. Good to see the tradition of research being carried out on NetBSD continuing!

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Disclaimer: All opinion expressed here is purely my own. No responsibility is taken for anything.

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