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  • August | 2014 | Irreal | Page 2
    Communication Technology Posted on August 17 2014 by jcs I ve said it before I m not a racing fan And yet I ve already written about it twice before and here I go again This post like the others focuses on the technical aspects of the sport According to this BBC Continue reading Posted in General Tagged Tech Leave a comment Computing the Inner Product with Common Lisp Posted on August 16 2014 by jcs Over at iqool Patrick Krusenotto asks how you would compute the inner product of two vectors using Common Lisp He gives a number of solutions all of which are interesting You can look at this problem two ways What is Continue reading Posted in Programming Tagged Common lisp Lisp 1 Comment TIL Something New About Ace Jump Mode Posted on August 15 2014 by jcs Regular readers know that I ve been a huge fan of ace jump mode ever since I saw it demonstrated by Magnor Sveen in one of his celebrated Emacs Rocks episodes More recently I ve been using it all the time as a replacement Continue reading Posted in General Tagged Emacs 6 Comments Org Mode Links Posted on August 14 2014 by jcs Artur Malabarba has a great post on using Org mode links to link to anything It s a hugely powerful facility that as Malabarba says is mostly unknown Head over to Endless Parentheses for the details I wasn t going to write about Continue reading Posted in General Tagged Emacs Org mode Leave a comment John Kitchin on Using Org Mode Posted on August 13 2014 by jcs I ve written about John Kitchin and his use of Emacs and org mode several times 1 2 3 4 5 Somehow I missed his latest contribution but

    Original URL path: http://irreal.org/blog/?m=201408&paged=2 (2016-04-25)
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  • Another Reason Closed Source is Harmful | Irreal
    held as plain text even thanks to Org Mode spreadsheet type data If OS X were to die tomorrow my data would be just as useful and accessible on Linux or even Windows The key here is that you must never commit any data you care about to anything but plain text If someone or something requires say word documents you write and maintain it in Org or Markdown mode and export it to word as Mark Szepieniec and Christophe Marie Duquesne outlined for résumés Most of us know and practice all this no matter which tribe we adhere to It turns out though that it s a bit more complicated Jonathan Zdziarski has an interesting post on digital forensics and the threat that closed source poses to it Most law enforcement agencies use closed source programs to extract data from phones or computers and for other forensic tasks One problem is that the user has no way of knowing what the programs are doing or how they re massaging the data This can present legal problems when for example the defense insists on auditing the program that produced the data In the case of breathalyzers which are also mostly closed source this has already resulted in DUI dismissals It gets worse though Zdziarski reports that the results these forensic programs produce are often flat out wrong even made up in some cases That s an obvious problem no matter which side of law enforcement you re on If you re the defendant you might get wrongly convicted If you re with law enforcement guilty parties may be erroneously cleared Closed source isn t the only problem that Zdziarski describes but it is a large one We will certainly see cases involving forensics depending on these programs challenged and dismissed

    Original URL path: http://irreal.org/blog/?p=2943 (2016-04-25)
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  • Version Control | Irreal
    despite frequent and comprehensive regression tests suddenly appeared after a commit Nothing too strange about that but when he dropped back to the previous commit the regression tests still failed even though they had passed just a few minutes ago It turned out that several commits had the mysterious bug but Raymond was able to locate the culprit pretty quickly with Git bisect Even if you re not a Git user you could still perform the bisection process manually although a good deal less conveniently The real enabling mechanism was VC Without it he d have had a long and frustrating ordeal of trying to locate each change and test if it was the genesis of the problem I ve heard many developers express the opinion that they don t need VC because they work alone As Raymond s story illustrates VC can save the day even for the lone developer 1 Hop on over and read Raymond s post and see if it doesn t convince you that you should be using VC whether or not you re working alone Footnotes 1 The code Raymond was working on GPSD is in fact a multi developer project but that doesn t come into play here The story takes place while he was working alone and all the code was his This entry was posted in Programming and tagged Tech Bookmark the permalink Extending Isearch Another Reason Closed Source is Harmful Marcin Borkowski Any software project is a collaborative project It has at least two developers the original developer and the original developer a few weeks or months later when the train of thought has long left the station from http who t blogspot com 2009 12 on commit messages html Search for Recent Posts Elisp Summary Emacs for Prose FISA

    Original URL path: http://irreal.org/blog/?p=2919 (2016-04-25)
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  • Extending Isearch | Irreal
    unless there is an active region If you are a heavy user of isearch and find yourself typing Ctrl s and then Ctrl w a lot this may be win for you This entry was posted in General and tagged Emacs Bookmark the permalink Tramp with Multiple Hops Version Control Greg Looks useful For the sake of completeness note that Emacs 24 4 introduced isearch forward symbol at point bound to M s by default Ryan Another useful isearch extension is anzu which gives you a live preview of how many matches there are for the current search and which one of those matches you re currently on https github com syohex emacs anzu Search for Recent Posts Elisp Summary Emacs for Prose FISA Abandons the Fourth Amendment Again Blogging with Org Mode and Nikola How to Keep Emacs Running Across an X Crash Recent Comments Mike Zamansky on Blogging with Org Mode and Nikola Phil on How to Keep Emacs Running Across an X Crash Sebastian Christ on European Quotation Marks NoonianAtall on A Hyper Key on Any USB Keyboard Kris on An Example of Why Reproducible Research Matters Links Useful Emacs Commands Archives April 2016 March 2016 February

    Original URL path: http://irreal.org/blog/?p=2917 (2016-04-25)
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  • Tramp with Multiple Hops | Irreal
    and it s a pain to temporarily add Tramp configuration rules for it Fortunately David Vázquez has tweeted the answer emacs tramp multi hops edit path in remotehost using bastion as a proxy C x C f ssh bird bastion ssh you remotehost path wow David Vázquez davazp August 13 2014 Unless you need to repeatedly access some remote host this is a much easier method The tweet tells you just about everything you need to know but you can see the details in the Tramp documentation This entry was posted in General and tagged Emacs Bookmark the permalink Awesome Emacs Extending Isearch David I don t think you should mess with the tramp configuration if you need regular access to some hosts via a hopping host Just set up a proper ssh config Host hopping User yourusername HostName hoppinghostname Host some hostname patterns User yourusername ProxyCommand ssh q hopping exec nc h p This has the big advantage that normal ssh commands like ssh and scp will also handle the connection via the hopping server in a transparent way But the tramp multi hop feature still seems to be useful if you don t want to change your ssh config for some one off connections Phil It s worth noting that there s a gotcha if you re using this for getting sudo access on the remote host See http stackoverflow com a 16408592 324105 for details jcs Yup I wrote about that here Figuring out how to do that was a big step forward in improving my workflow jcs And now I notice that Michael Albinus commented about the ad hoc multi hop method in that old post of mine I d forgotten all about it Search for Recent Posts Elisp Summary Emacs for Prose FISA Abandons the

    Original URL path: http://irreal.org/blog/?p=2915 (2016-04-25)
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  • Awesome Emacs | Irreal
    a list of Emacs packages that people find particularly useful Each package on the list has a link to some elementary documentation usually but not always a GitHub README file A testament to the quality of the list is that almost all the packages I have installed are on it That gives me confidence that I ll find the others on the list useful too You probably won t want to install them all because many are for specialized environments such as Erlang development The packages are listed by category so it s easy to find packages relevant to your needs Even if you re an experienced Emacs user it s worthwhile taking a look at the list This entry was posted in General and tagged Emacs Bookmark the permalink Wisdom Tramp with Multiple Hops Sudhir Khanger I have read and forgotten the built in tutorial I am going to read it again Do you think that would be enough to get started with org mode jcs I think the best resource for learning Org is Bernt Hansen s Organize Your Life in Plain Text If you re interested in using Org to create LaTeX documents Eric Neilsen s post that I wrote about here will help too Search for Recent Posts Elisp Summary Emacs for Prose FISA Abandons the Fourth Amendment Again Blogging with Org Mode and Nikola How to Keep Emacs Running Across an X Crash Recent Comments Mike Zamansky on Blogging with Org Mode and Nikola Phil on How to Keep Emacs Running Across an X Crash Sebastian Christ on European Quotation Marks NoonianAtall on A Hyper Key on Any USB Keyboard Kris on An Example of Why Reproducible Research Matters Links Useful Emacs Commands Archives April 2016 March 2016 February 2016 January 2016 December 2015 November

    Original URL path: http://irreal.org/blog/?p=2913 (2016-04-25)
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  • Building a Dynamic Menu | Irreal
    activated so there s no need for it to track the directory in real time It s easy to imagine all sorts of situations in which having such a menu might be useful For example I could have a menu that let me choose a post from my post queue to publish to Irreal Kitchin s code is just the latest of the many interesting things he s contributed to the Emacs community lately It s worthwhile subscribing to his blog to keep up with his output Update Kitchen Kitchin This entry was posted in Programming and tagged Emacs Bookmark the permalink PGP Problems Wisdom Jean Philippe Paradis Kitchin not Kitchen jcs Fixed thanks Search for Recent Posts Elisp Summary Emacs for Prose FISA Abandons the Fourth Amendment Again Blogging with Org Mode and Nikola How to Keep Emacs Running Across an X Crash Recent Comments Mike Zamansky on Blogging with Org Mode and Nikola Phil on How to Keep Emacs Running Across an X Crash Sebastian Christ on European Quotation Marks NoonianAtall on A Hyper Key on Any USB Keyboard Kris on An Example of Why Reproducible Research Matters Links Useful Emacs Commands Archives April 2016 March 2016 February

    Original URL path: http://irreal.org/blog/?p=2908 (2016-04-25)
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  • PGP Problems | Irreal
    On the Mac for example GPGMail integrates more or less transparently with the Mail App There are two buttons for choosing signing and or encrypting an outgoing email which can be set to perform their functions by default and incoming encrypted mail is automatically decrypted perhaps after prompting for a password for the private key Probably easy enough for even Aunt Millie So what are the problems Matthew Green has a post that offers an answer The real problem is what it always is with crypto systems key management Current email encryption systems which are mostly all based on the OpenPGP protocol illustrate this nicely After you ve generated a GnuPG PGP key how do you communicate it to Aunt Millie How she can she be sure it s really your key and not that of her other conniving evil nephew Those are just some of the problems that an email encryption system must deal with Read Green s post for exactly what those problems are and some possible solutions This entry was posted in General and tagged Security Bookmark the permalink Map Reduce Explained Building a Dynamic Menu Search for Recent Posts Elisp Summary Emacs for Prose FISA Abandons the Fourth Amendment Again Blogging with Org Mode and Nikola How to Keep Emacs Running Across an X Crash Recent Comments Mike Zamansky on Blogging with Org Mode and Nikola Phil on How to Keep Emacs Running Across an X Crash Sebastian Christ on European Quotation Marks NoonianAtall on A Hyper Key on Any USB Keyboard Kris on An Example of Why Reproducible Research Matters Links Useful Emacs Commands Archives April 2016 March 2016 February 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015

    Original URL path: http://irreal.org/blog/?p=2906 (2016-04-25)
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