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This is part three of a multi-part introduction to termios and terminal emulation on UNIX. Read part 1 or part 2 if you’re new here) For my final entry on termios, I will be looking at job control in the shell (i.e. backgrounding and foreground jobs) and the very closely related topic of signal generation by termios, in response to INTR and friends. Sessions and Process Groups For the purposes of termios, processes are organized into two hi..
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Thanks to the Panda3D 1.7.0 shader generator supporting shadow mapping, and the awesome new BuildBot service set up on the Panda3D website, A3P now supports basic shadow mapping! Actually, the sun is just implemented as a giant spotlight with a 2048x2048 shadow buffer. Definitely not the most efficient or high-quality method, but certainly the easiest, and the results are acceptable. Also new in SVN is a reloading mechanic. The shotgun, c..
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I’ve had a couple of mails relating to this PSN, which again references the research that Andy Davidson, Jonathan Oddy and I did last year. It seems that some of the sources of the initial mailing list posts we made are gone (particularly the merit.edu one that is referenced from both Juniper’s site and most other places). For that reason, I’ve included both the mails that we sent to NANOG/C-NSP/J-NSP last year here.
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I’ve had a couple of mails relating to this PSN, which again references the research that Andy Davidson, Jonathan Oddy and I did last year. It seems that some of the sources of the initial mailing list posts we made are gone (particularly the merit.edu one that is referenced from both Juniper’s site and most other places). For that reason, I’ve included both the mails that we sent to NANOG/C-NSP/J-NSP last year here.
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There Isn't an App For That” - Windows Apps I haven't been able to replace in Mac OS X For a very long time I was a Windows guy, I was once a DOS guy. I switched nearly exclusively to Mac for my home use about 4 years ago. I’ve been very happy with it. Its stable, well engineered, and - my favorite part of all - consistent. Yet, in this time there remain a few applications I cannot seem to replace. Nusphere PhpED I am a PHP Develope....
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There Isn't an App For That” - Windows Apps I haven't been able to replace in Mac OS X For a very long time I was a Windows guy, I was once a DOS guy. I switched nearly exclusively to Mac for my home use about 4 years ago. I’ve been very happy with it. Its stable, well engineered, and - my favorite part of all - consistent. Yet, in this time there remain a few applications I cannot seem to replace. Nusphere PhpED I am a PHP Develope....
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It's time to face the facts. While the game is progressing at an incredible pace, it's not going to be ready by January 9, or even the end of January. So, I guess I failed to meet my deadline. But! I'm not giving up. I'll still be releasing regular updates, and especially once the multiplayer lobby server is set up, things will start getting a lot more polish. My new goal will be to finish the game before school lets out for the summer. O..
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A lovely, albeit slightly chilly, start to 2010 with the Grupetto this morning. About 90km out to Windsor and back to London on one of our normal training routes. Mark also kindly took some photos , a few of which feature me.
Lots more similar rides to come whilst training for Paris-Roubaix and the Tour of Flanders.
Happy New Year!
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A lovely, albeit slightly chilly, start to 2010 with the Grupetto this morning. About 90km out to Windsor and back to London on one of our normal training routes. Mark also kindly took some photos , a few of which feature me.
Lots more similar rides to come whilst training for Paris-Roubaix and the Tour of Flanders.
Happy New Year!
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It was fun doing this last year. So I thought I would have another go at it and see what I come up with.
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After seeing some of the great examples of coders working on practiced problems on KataCasts, I decided to try make my own. I am not happy with the pacing of the video. I’m about a minute too early relative to the music. But I thought I’d post the video here, to see what you all think. Comments are welcome! I hope the video will demonstrate how to use refactoring effectively to drive the design of a program.
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For all network deployments, there is a requirement to present information relating to both topology, and various utilisation statistics to some human operator. In many cases, this process has become so ingrained in network requirements that there are almost ubiquitous solutions to the visualising data - for example, link utilisation is almost always presented via some framework or tool powered by RRDTool . Other tools, such as network "we..
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For all network deployments, there is a requirement to present information relating to both topology, and various utilisation statistics to some human operator. In many cases, this process has become so ingrained in network requirements that there are almost ubiquitous solutions to the visualising data - for example, link utilisation is almost always presented via some framework or tool powered by RRDTool . Other tools, such as network "we..
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Some time ago I wrote a post about how COUNT(*) and COUNT(column) are semantically different things ( link ). Such queries may return different results if the column counted has NULLs in it. And the difference comes from that NULL is not a value, it’s rather a state which says “value unknown” or “no value entered”. So, you better understand how NULLs interact with your SQL constructs if you call yourself a DBA or a database developer ;-)
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Some time ago I wrote a post about how COUNT(*) and COUNT(column) are semantically different things ( link ). Such queries may return different results if the column counted has NULLs in it. And the difference comes from that NULL is not a value, it’s rather a state which says “value unknown” or “no value entered”. So, you better understand how NULLs interact with your SQL constructs if you call yourself a DBA or a database developer ;-)
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This is part two of a multi-part introduction to termios and terminal emulation on UNIX. Read part 1 if you’re new here) In this entry, we’ll look at the interfaces that are used to control the behavior of the “termios” box sitting between the master and slave pty. The behaviors I described last time are fine if you have a completely dumb program talking to the terminal, but if the program over on the right is using curses (like emacs or vi..
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This is part two of a multi-part introduction to termios and terminal emulation on UNIX. Read part 1 if you’re new here) In this entry, we’ll look at the interfaces that are used to control the behavior of the “termios” box sitting between the master and slave pty. The behaviors I described last time are fine if you have a completely dumb program talking to the terminal, but if the program over on the right is using curses (like emacs or vi..
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A function for converting characters into a UTF-8 format, required by Google Maps for making API calls.
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That "a" stands for "not quite ready yet". This is sort of an intermediate release that focuses mainly on online multiplayer, which is largely functional, but needs more testing. Aside from polish and bug fixes, the only other things I'm going to add are more weapons and special abilities. And maybe a new level. We'll see. This release went much smoother than the last two, as I used Panda3D's built-in packpanda to make the installer. I al..
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Goodbye Stainless, hello A3P. I spent a good chunk of time creating new A3P material and switching everything over to the new name. Unfortunately, SourceForge's UNIX rename feature is down, so I created a new project for web hosting purposes only. The code and file releases are still on the Stainless SourceForge project. Which, to be extra confusing, I renamed as well, but again, I couldn't change the UNIX name.
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Lately, I’ve been working on two code katas, that is, programming exercises that I repeat until the motions are secure in my muscle memory. The katas I’ve chosen are: Java EE Spike: An application that stores People with names to a database and lets me search for them. I’ve repeated this pair programming with several different programmers. Programmable Fizz Buzz: Create a sequence of numbers 1,2,fizz,4,buzz,fizz,… you know the one. And the ..
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Cary Millsap’s recent post prompted me to write down some of the related thoughts in my head. Here are few of my mantras for systematic troubleshooting and performance tuning, which have materialized in my head over the years of work: Picking the right starting point to troubleshooting and performance tuning is the most important decision in that process. Pick the wrong starting point and you end up going in circles. The scope of your....
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Cary Millsap’s recent post prompted me to write down some of the related thoughts in my head. Here are few of my mantras for systematic troubleshooting and performance tuning, which have materialized in my head over the years of work: Picking the right starting point to troubleshooting and performance tuning is the most important decision in that process. Pick the wrong starting point and you end up going in circles. The scope of your....
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If you’re a regular user of the terminal on a UNIX system, there are probably a large number of behaviors you take mostly for granted without really thinking about them. If you press ^C or ^Z it kills or stops the foreground program – unless it’s something like emacs or vim, in which case it gets handled like a normal keystroke. When you ssh to a remote host, though, they go to the processes on that machine, not the ssh process.
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If you’re a regular user of the terminal on a UNIX system, there are probably a large number of behaviors you take mostly for granted without really thinking about them. If you press ^C or ^Z it kills or stops the foreground program – unless it’s something like emacs or vim, in which case it gets handled like a normal keystroke. When you ssh to a remote host, though, they go to the processes on that machine, not the ssh process.
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Recently, the Amazon Kindle 2 (International Edition) arrived in Canada (the last country to get it :-), and I recently picked one up. Since its original introduction in November 2007, I have watched reviews of it fly around the Internet and on blogs such as GeekBrief.tv. Although the reviews were generally positive, I really couldn’t visualize myself replacing my book collection with a Kindle for the simple reason that books have their ..
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Recently, the Amazon Kindle 2 (International Edition) arrived in Canada (the last country to get it :-), and I recently picked one up. Since its original introduction in November 2007, I have watched reviews of it fly around the Internet and on blogs such as GeekBrief.tv. Although the reviews were generally positive, I really couldn’t visualize myself replacing my book collection with a Kindle for the simple reason that books have their ..
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Sorry for the distinct lack of updates this blog has. A lot is happening right now with Stainless, and most of it's good. :) First off, Stainless is going to have online multiplayer! Woot. Thanks to the fabulous work by the guys over at Panda3D, it may even live in a browser plugin on the SourceForge website. Either way, I came across a problem I never anticipated with online multiplayer: NAT punch-through .
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A quick personal post to break the silence here! I’m currently very interested in hearing about any UK or EU-based network engineering or architecture opportunities that are out there, especially in SP networks that run MPLS with TE. If anyone has some such opportunity, or knows of something that they think might suit me – please drop me a mail to rjs@rob.sh for a copy of my CV. An outline of my CV is available on LinkedIn . ..
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A quick personal post to break the silence here! I’m currently very interested in hearing about any UK or EU-based network engineering or architecture opportunities that are out there, especially in SP networks that run MPLS with TE. If anyone has some such opportunity, or knows of something that they think might suit me – please drop me a mail to rjs@rob.sh for a copy of my CV. An outline of my CV is available on LinkedIn . ..
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Something is going wrong in my life. I read the book about Hibernate by its author, Gavin King, and I was really impressed, for the first time in my life, by an object-relational mapping system. Although I doubted it would really save development time over writing SQL manually, I thought it wouldn’t significantly increase development time either, and it had a few nice features (like being able to have a key-value Map in an object,..
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not that what i’m about to tell you is brilliant, new or revolutionary, however i thought i’d mention it in case you’re not doing it. also feel free to let me know if there is a better way. problem: i have some stdout which comes from a command and i want it in a file on another machine. i could first send it to a temp file, scp that over, and then remove the temp file; but instead, i’ll just:
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not that what i’m about to tell you is brilliant, new or revolutionary, however i thought i’d mention it in case you’re not doing it. also feel free to let me know if there is a better way. problem: i have some stdout which comes from a command and i want it in a file on another machine. i could first send it to a temp file, scp that over, and then remove the temp file; but instead, i’ll just:
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Available on the new website: stainless.sf.net There's a whole bunch of new stuff in v0.4 that I don't have time to talk about. So check out the website to see the new HD trailer.
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Recent Activity Mar. 11, 2019GitHub ( web-flow ) Update README.md Apr. 14, 2015Jesse Donat ( donatj ) Correct year and formatting Create LICENSE.md Jan. 7, 2014Merge pull request #9 from bitdeli-chef/master Add a Bitdeli Badge to README Bitdeli Chef ( bitdeli-chef ) Add a Bitdeli badge to README Jul. 15, 2013Jesse Donat ( donatj ) Better constant May. 16, 2013Cache class made to serialize Apr. 26, 2013Corrections to the Gith....
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Recent Activity Mar. 11, 2019GitHub ( web-flow ) Update README.md Apr. 14, 2015Jesse Donat ( donatj ) Correct year and formatting Create LICENSE.md Jan. 7, 2014Merge pull request #9 from bitdeli-chef/master Add a Bitdeli Badge to README Bitdeli Chef ( bitdeli-chef ) Add a Bitdeli badge to README Jul. 15, 2013Jesse Donat ( donatj ) Better constant May. 16, 2013Cache class made to serialize Apr. 26, 2013Corrections to the Gith....
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America’s Forgotten Problem by Samuel Solomon / ASSOCIATE NEWS EDITOR 12.03.09 – 05:00 am American infrastructure is failing.
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Spidering, in its simplest form is the act of transferring data from one database to another. Spidering requires the use of Regular Expressions, the cURL library (if POST data or cookies are used), and the cron libraries (if we need to download information with a schedule).
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Yes, you can now view the last five games you played as a spectator! All I did was save each network packet that's sent out into a big list, then use Python's pickle module to serialize the list to a file. Each packet has a timestamp, so I just read the packets back in order, checking the timestamps to make sure it reads the packets back at the right speed. Fast forwarding is not implemented, but it would be pretty easy. Rewinding/seeking w..
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An estimated $42,500 in laptop computers was stolen from the Haley Center between Nov. 6 and Nov. 9. Twenty-five laptops were stolen.
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There’s another interesting thread going on in Oracle-L, about understanding logical IOs and drilling down into their reasons. Of course sometimes (or rather usually) the excessive logical IOs come from a bad execution plan (when a nested loop loops over lots of datablocks again and again or a wrong index is used for driving a query etc), but sometimes the excessive LIOs are caused by some internal issues, like space management etc. A c....
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