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Installing LBP 2900 printer -> libs folders wrong?

- by Peter Smit

I am trying to get my Canon LBP2900 printer to work on Ubuntu 11.10 64 bit. What I have done is try to follow the steps on https://help.ubuntu.com/community/CanonCaptDrv190 So I downloaded the version 2.3 driver and tried to convert the rpm files to debian and installed them sudo alien cndrvcups-capt-2.30-1.x86_64.rpm cndrvcups-common-2.30-1.x86_64.rpm sudo dpkg -i cndrvcups-capt-2.30-1.x86_64.deb cndrvcups-common-2.30-1.x86_64.deb restarted cups and try to install the printer with lpadmin: sudo service cups restart sudo /usr/sbin/lpadmin -p LBP2900 -m /usr/share/cups/model/CNCUPSLBP2900CAPTK.ppd -v ccp://localhost:59787 -E What I noticed however that on the step with lpadmin it goes wrong with the error: lpadmin: Bad device-uri scheme "ccp" After trying to trace what has gone wrong, I think I nailed it to the fact that dpkg installed a file /usr/lib64/cups/backend/ccp instead of /usr/lib/cups/backend/ccp Checking the original rpm with archive manager shows indeed that /usr/lib and /usr/lib64 are used, with the backend/cpp file only installed in lib64. As I understand correctly, Ubuntu 11.10 uses /usr/lib32 and /usr/lib instead so the files are installed in the wrong place. Is there an automated method of converting the rpm/deb files with the wrong lib structure to one with the right lib structure for ubuntu 11.10? Or am I completely on the wrong track for getting my printer installed?

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Applying WCAG 2.0 to Non-Web ICT: second draft published from WCAG2ICT Task Force - for public review

- by Peter Korn

Last Thursday the W3C published an updated Working Draft of Guidance on Applying WCAG 2.0 to Non-Web Information and Communications Technologies. As I noted last July when the first draft was published, the motivation for this guidance comes from the Section 508 refresh draft, and also the European Mandate 376 draft, both of which seek to apply the WCAG 2.0 level A and AA Success Criteria to non-web ICT documents and software. This second Working Draft represents a major step forward in harmonization with the December 5th, 2012 Mandate 376 draft documents, including specifically Draft EN 301549 "European accessibility requirements for public procurement of ICT products and services". This work greatly increases the likelihood of harmonization between the European and American technical standards for accessibility, for web sites and web applications, non-web documents, and non-web software. As I noted last October at the European Policy Centre event: "The Accessibility Act – Ensuring access to goods and services across the EU", and again last month at the follow-up EPC event: "Accessibility - From European challenge to global opportunity", "There isn't a 'German Macular Degernation', a 'French Cerebral Palsy', an 'American Autism Spectrum Disorder'. Disabilities are part of the human condition. They’re not unique to any one country or geography – just like ICT. Even the built environment – phones, trains and cars – is the same worldwide. The definition of ‘accessible’ should be global – and the solutions should be too. Harmonization should be global, and not just EU-wide. It doesn’t make sense for the EU to have a different definition to the US or Japan." With these latest drafts from the W3C and Mandate 376 team, we've moved a major step forward toward that goal of a global "definition of 'accessible' ICT." I strongly encourage all interested parties to read the Call for Review, and to submit comments during the current review period, which runs through 15 February 2013. Comments should be sent to public-wcag2ict-comments-AT-w3.org. I want to thank my colleagues on the WCAG2ICT Task Force for the incredible time and energy and expertise they brought to this work - including particularly my co-authors Judy Brewer, Loïc Martínez Normand, Mike Pluke, Andi Snow-Weaver, and Gregg Vanderheiden; and the document editors Michael Cooper, and Andi Snow-Weaver.

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Simple script to get referenced table and their column names

- by Peter Larsson

-- Setup user supplied parameters DECLARE @WantedTable SYSNAME SET @WantedTable = 'Sales.factSalesDetail' -- Wanted table is "parent table" SELECT PARSENAME(@WantedTable, 2) AS ParentSchemaName, PARSENAME(@WantedTable, 1) AS ParentTableName, cp.Name AS ParentColumnName, OBJECT_SCHEMA_NAME(parent_object_id) AS ChildSchemaName, OBJECT_NAME(parent_object_id) AS ChildTableName, cc.Name AS ChildColumnName FROM sys.foreign_key_columns AS fkc INNER JOIN sys.columns AS cc ON cc.column_id = fkc.parent_column_id AND cc.object_id = fkc.parent_object_id INNER JOIN sys.columns AS cp ON cp.column_id = fkc.referenced_column_id AND cp.object_id = fkc.referenced_object_id WHERE referenced_object_id = OBJECT_ID(@WantedTable) -- Wanted table is "child table" SELECT OBJECT_SCHEMA_NAME(referenced_object_id) AS ParentSchemaName, OBJECT_NAME(referenced_object_id) AS ParentTableName, cc.Name AS ParentColumnName, PARSENAME(@WantedTable, 2) AS ChildSchemaName, PARSENAME(@WantedTable, 1) AS ChildTableName, cp.Name AS ChildColumnName FROM sys.foreign_key_columns AS fkc INNER JOIN sys.columns AS cp ON cp.column_id = fkc.parent_column_id AND cp.object_id = fkc.parent_object_id INNER JOIN sys.columns AS cc ON cc.column_id = fkc.referenced_column_id AND cc.object_id = fkc.referenced_object_id WHERE parent_object_id = OBJECT_ID(@WantedTable)

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Bug fix for Eclipse runtime plugin

- by Peter Benedikovic

This blog is intended to inform about bug fix that solves this issue. Before continuing further, one important note – the linux and mac users do not need to read further because this bug appears only on Windows. The problem was that the runtime plugin registered new runtime and server each time the Eclipse started. Users ended up with server view looking like this: I have created new runtime plugin which is now available at the update site http://download.java.net/glassfish/eclipse/indigo (or the same ending with juno for Juno users). You will still need to unistall the buggy plugin and (optionally but recommended) to remove runtimes created by this plugin. Here is the guide how to install bugfix: Uninstall buggy runtime plugin via menu Help->About Eclipse->Installation details. Remove runtimes created by old plugin – via Window->Preferences->Server->Runtime Environment. After pressing remove button you may be asked if you want to remove also the servers based on runtime being removed. Recommended is to do so. Now you can install new runtime plugin. Go to Help->Install New Software. You may ask why I haven‘t provided the update for buggy runtime which could be installed via Check for updates feature of Eclipse. It has two main reasons: The bug fix is needed only for Windows users so I didn't want to bother other users by updating working plugin. The runtime plugin has had structure that was not quite suitable for Eclipse update. This structure is now changed so future bugs (I am sure that there will be no such ;)) can be fixed by standard update. Have a good one!

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What should developers know about Windows executable binary file compression?

- by Peter Turner

I'd never heard of this before, so shame on me, but programs like UPX can compress my files by 80% which is totally sweet, but I have no idea what the the disadvantages are in doing this. Or even what the compressor does. Website linked above doesn't say anything about dynamically linking DLLs but it mentions about compressing DESCENT 2 and about compressing Netscape 4.06. Also, it doesn't say what the tradeoffs are, only the benefits. If there weren't tradeoffs why wouldn't my linker compress the file? If I have an environment where I have one executable and 20-30 DLL's, some of which are dynamically loaded an unloaded fairly arbitrarily, but not in loops (hopefully), do I take a big hit in processing time decompressing these DLL's when they're used?

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Literature in programming and computer science

- by Peter Turner

I hope, gentle programmers, that you'll forgive me for not asking a "Soft Question" on theoreticalCS.SE and asking this here. It has recently come to my attention that bigendian came from Jonathan Swift's Gulliver's Travels. I was pretty surprised when listening to the book on my commute to hear something I'd only heard before in Comp Sci / Engineering classes. I thought it was some sort of nouveau-politically incorrect piece of holdover jargon like Master and Slave drives or Polish Notation. Are there any other incidents, not of politically incorrect jargon, but of literature influencing aspects of computers, programming or software development?

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Why is testing MVC Views frowned upon?

- by Peter Bernier

I'm currently setting the groundwork for an ASP.Net MVC application and I'm looking into what sort of unit-tests I should be prepared to write. I've seen in multiple places people essentially saying 'don't bother testing your views, there's no logic and it's trivial and will be covered by an integration test'. I don't understand how this has become the accepted wisdom. Integration tests serve an entirely different purpose than unit tests. If I break something, I don't want to know a half-hour later when my integration tests break, I want to know immediately. Sample Scenario : Lets say we're dealing with a standard CRUD app with a Customer entity. The customer has a name and an address. At each level of testing, I want to verify that the Customer retrieval logic gets both the name and the address properly. To unit-test the repository, I write an integration test to hit the database. To unit-test the business rules, I mock out the repository, feed the business rules appropriate data, and verify my expected results are returned. What I'd like to do : To unit-test the UI, I mock out the business rules, setup my expected customer instance, render the view, and verify that the view contains the appropriate values for the instance I specified. What I'm stuck doing : To unit-test the repository, I write an integration test, setup an appropriate login, create the required data in the database, open a browser, navigate to the customer, and verify the resulting page contains the appropriate values for the instance I specified. I realize that there is overlap between the two scenarios discussed above, but the key difference it time and effort required to setup and execute the tests. If I (or another dev) removes the address field from the view, I don't want to wait for the integration test to discover this. I want is discovered and flagged in a unit-test that gets multiple times daily. I get the feeling that I'm just not grasping some key concept. Can someone explain why wanting immediate test feedback on the validity of an MVC view is a bad thing? (or if not bad, then not the expected way to get said feedback)

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What feature is at play when Ctrl+Shift+Alt+U,E "types" an unprintable hex 000E?

- by Peter.O

I tend to use Ctrl+Shift+Alt for my customized system-wide keybindings. When I tried Ctrl+Shift+Alt+U it printed an underscored u and waited for more keyboard input!... Some keys were accepted and some were not... eg. Numbers were accepted and they too were underlined, but only a few keys allowed me to break out. I then tried Ctrl+Shift+Alt+U immediately followed by Ctrl+Shift+Alt+E. This produced an unprintable hex 000E(?) and broke out of the loop... The unprintable character got me thinking that this may be Unicode related. If so, how so? What is happening here? Is this underscored u a trigger for an Input Method Editor? This behaviour occurs: Here (as I type), "gedit", text-edit fields... (but not in the Terminal)... and "gvim" reported "pattern not found"...

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Az érem másik oldala

- by peter.nagy

Az Exalogic kapcsán, ha már valaki hallott róla, akkor leginkább a teljesítmény ugrik be. Mint normálisan majdnem minden szerver megoldás új verziójánál. Nos ez nyilvánvalóan nincs másképp itt sem, amire büszkék is lehetünk. Ugyanakkor nagyon fontos tulajdonsága az Exalogicnak, hogy szinte azonnal hadrafogható. Ez persze már részben elérheto, mivel képesek vagyunk kész virtuális gépeket letölteni komplett telepítéssel. Persze ott még a vasra külön fel kell húzni a virtualizációs szoftvert. Na és itt jönnek a problémák. Bárki aki már látott, csinált, vagy végig nézte egy rendszerhez szükséges infrastruktúra felhúzását az tudja mirol beszélek. A telepítés, megfelelo verziók, szükséges patch-ek, hálózati eszközök bekötése. Aztán mindennek a konfigurálása. A legjobb esetben is napok, de inkább hetek kérdése mire üzemkész lenne. Az Exalogic esetében ez más, hiszen gyárilag összereszelték, a konfiguráció kialakítása gyakorlatilag néhány paraméter file és kész. De lássuk is, hogy mennyi ido onnan, hogy kibontottuk a dobozból. Mindössze egy nap. A hab a tortán pedig a full stack upgrade. Nem külön minden egyes komponenst. Firmware-tol a WebLogic szerverig.

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Can't install Ubuntu on Asus Eee 1015pem

- by Peter

I'm having trouble to install Ubuntu. I use a ASUS Eee 1015pem netbook. Recently, I my netbook got wet. I had it inside my backback and all my things got wet. The netbook boots up fine but it will not load the OS. I downloaded ubuntu onto my external hard drive and changed the settings in my Bios to boot from a removable device. Nothing happens. When I plug in my external hard drive I'm not able to get to the boot icon. I have to unplug it the external hard drive. Set my boot settings I tried both Removable and CD-Rom. Than I plug my external drive back in and nothing happens on either settings. My Asus never came with a recovery disk and suppose to have a build in recovery by pressing F9 in the Bios. Also I need to disable Boot Booster in Bios and Boot Booster is not even an opition in Bios. My friend told me try installing Ubuntu but now I'm having no luck with Ubuntu. Any suggestions?

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Do programmers possess the means of production?

- by Peter Turner

I was listening to The Servile State by Hilare Belloc this morning and pondering whether or not I possessed the means of production, as did the peasant of the middle ages; as did not his descendants after the oligarchs of England forced him into servility. The means of production was the arable land that the serf was seated on, which even though not legally his, was illegal to evict him from. So, as programmers, with the hither-to-unknown supply of free tools and resources, have we reclaimed as a class of workers, unlike any others, the means of production. Given the chance, a midrange PC and a stable internet connection, could we not each of us be wholly self sufficient and not just wage earners?

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Extracting GPS Data from JPG files

- by Peter W. DeBetta

I have been very remiss in posting lately. Unfortunately, much of what I do now involves client work that I cannot post. Fortunately, someone asked me how he could get a formatted list (e.g. tab-delimited) of files with GPS data from those files. He also added the constraint that this could not be a new piece of software (company security) and had to be scriptable. I did some searching around, and found some techniques for extracting GPS data, but was unable to find a complete solution. So, I did...(read more)

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Unable to recognize hard drive after replacing a drive

- by Peter Schriver

I have a Poweredge 830 that I had been using with 1 OS Sata drive and 3 data drives. One of the drives had some failing sectors so I replaced it with a different drive. For some bizarre reason the computer would not reboot so I disconnected all of the media drives and did a clean reinstall on the OS drive. Only the boot drive and one of the media drives are now recognized by my Bios. Drive 0 and 2. Drive 1 and 3 are listed in the Bios as "Unkown Device" Any help would be appreciated I think there may be something wrong with the install. For some reason when I attempt to change the display it says I have a laptop.If you think a reinstall is in order I will try that.

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How to filter content in the cureently opened folder?

- by peter matis

there is one thing I'm missing since I've been forced to move from osx to ubuntu. for osx there is wonderful file browser named Path Finder which has very handy filter function build in. the search field in the Path Finders upper right corner isn't searching your whole HD, it's not searching in all the sub folders of a given directory (like in nautilus). it's just filtering the content of the folder you have currently opened whithout loking in to the sub folders. is there something similar (plugin, exstention...) available for nautilus? two users are already asking the same question, but the answers obviously missed the point.

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Oracle Sun Java Roadshow - Budapest

- by peter.nagy

Még a Sun Magyarország gondozásában, akik korábban is vitték ezen rendezvényeket újabb Java Roadshow esemény lesz. A sok külföldi eloado mellett hazai is lesz. A témák pedig meglehetosen aktuálisak: -Java at Oracle -Java in Embedded (SE, ME) -Java For Business -What is New in Java - Java FX, JDK 7 Szóval tessék jönni és meghallgatni, megvitatni. Logisztika: 2010. Május 20. 08:30 - 16:30 Ramada Plaza Budapest Hotel (1036 Árpád fejedelem útja 94.)

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User defined type for healthcare / Medical Records variable name prefixes?

- by Peter Turner

I was reading Code Complete regarding variable naming in trying to find an answer to this question and stumbled on a table of commonly accepted prefixes for programming word processor software. Well, I'm not a word processor software programmer, but if I was, I'd be happy to use those user defined types. Since I'm a programmer for a smallish healthcare ISV, and have no contact with the larger community of healthcare software programmers (other than the neglected and forsaken HealthCareIT.SE where I never had the chance to ask this question). I want to know if there is a coding convention for medical records. Like Patient = pnt and Chart = chrt and Medication = med or mdctn or whatever. I'm not talking full on hungarian notation, but just a standard that would fit in code complete in place of that wonderful chart of word processor UDT's which are of so little use to me.

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How to calculate the covariance in T-SQL

- by Peter Larsson

DECLARE @Sample TABLE ( x INT NOT NULL, y INT NOT NULL ) INSERT @Sample VALUES (3, 9), (2, 7), (4, 12), (5, 15), (6, 17) ;WITH cteSource(x, xAvg, y, yAvg, n) AS ( SELECT 1E * x, AVG(1E * x) OVER (PARTITION BY (SELECT NULL)), 1E * y, AVG(1E * y) OVER (PARTITION BY (SELECT NULL)), COUNT(*) OVER (PARTITION BY (SELECT NULL)) FROM @Sample ) SELECT SUM((x - xAvg) *(y - yAvg)) / MAX(n) AS [COVAR(x,y)] FROM cteSource

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What is missing and should be added to Code Complete 3rd Edition? [closed]

- by Peter Turner

It's been quite a few years since Code Complete was published. I really love the book, I keep it in the bathroom at the office and read a little out of it once or twice a day. What developments in computer software... development need to be added to Code Complete 3e, and for the sake of reductionism, what should be removed to make room for them? Is it necessary even possible to call Code Complete Code Complete if it doesn't have language features that even Delphi has like anonymous methods and generics? Also, what languages would be more appropriate than C++ to use for a majority of code examples?

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Upgrade fails because of blcr-dkms

- by Peter Smit

When I try to update my Ubuntu 10.04 installation to 10.10 I get the following error. Could not calculate the upgrade An unresolvable problem occurred while calculating the upgrade: Trying to install blacklisted version 'blcr-dkms_0.8.2-13' This can be caused by: * Upgrading to a pre-release version of Ubuntu * Running the current pre-release version of Ubuntu * Unofficial software packages not provided by Ubuntu If none of this applies, then please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report. None of the three applies to me (I think). Now I found that this also affects someone else: https://bugs.launchpad.net/update-manager/+bug/657662 Is there here someone who knows what could be wrong? Or a workaround so that I can install Maverick Meerkat?

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Wifi speed with driver rtl8187 drops

- by Peter

I am using lucid lynx with this USB adapter and drivers rtl8187. When I start a download, it starts at 1500kpbs (if i use "iwconfig wlan0 rate [more than 11MB]" it starts at a lower speed), it transfers a few kbs but then the speed starts to drop constantly and nothing is being transferred. I've also tried the driver r8187, but I have the same speed problem only that with this driver the download starts at only 10kbps, and drops from there. What can I try to identify the cause and fix this problem?

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Do programmers possess the means of production? [closed]

- by Peter Turner

I was reading (err listening) to The Servile State by Hilare Belloc this morning and pondering whether or not I possessed the means of production, as did the peasant of the middle ages; as did not his descendants after the oligarchs of England forced him into servility. The means of production was the arable land that the serf was seated on, which even though not legally his, was illegal to evict him from. So, as programmers, with the hither-to-unknown supply of free tools and resources, have we reclaimed as a class of workers, unlike any others, the means of production. Given the chance, a midrange PC and a stable internet connection, could we not each of us be wholly self sufficient and not just wage earners?

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How to drastically improve code coverage?

- by Peter Kofler

I'm tasked with getting a legacy application under unit test. First some background about the application: It's a 600k LOC Java RCP code base with these major problems massive code duplication no encapsulation, most private data is accessible from outside, some of the business data also made singletons so it's not just changeable from outside but also from everywhere. no business model, business data is stored in Object[] and double[][], so no OO. There is a good regression test suite and an efficient QA team is testing and finding bugs. I know the techniques how to get it under test from classic books, e.g. Michael Feathers, but that's too slow. As there is a working regression test system I'm not afraid to aggressively refactor the system to allow unit tests to be written. How should I start to attack the problem to get some coverage quickly, so I'm able to show progress to management (and in fact to start earning from safety net of JUnit tests)? I do not want to employ tools to generate regression test suites, e.g. AgitarOne, because these tests do not test if something is correct.

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Can I instruct the browser not to look for a favicon?

- by Peter Boughton

I have a website that doesn't have/need a favicon. Is there a way to instruct the browser not to waste a request looking for /favicon.ico ? I don't mean filtering logs, but something client-side, like this: <link rel="shortcut icon" href="about:blank" /> That appears to work, but I'm not in a position to do comprehensive tests, (and search engines are being unhelpful). Can anyone confirm if this is a valid method, or provide a suitable alternative?

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Distributing an Android game with plugins via the market

- by Peter Serwylo

I'm new to Android development, and was wondering how the following could be achieved within the confines of the Android market as a distribution channel: One main application, which handles the main menu, networking, high scores, etc. Several games which can be launched from the main menu, which all work within the same eco system. The main application is not just a pseudo launcher for other games, these different games will share high scores and other achievements/preferences. In a traditional package management system such as apt, pacman or yum, this could be handled quite happily through dependencies. This does not appear to be possible via the Android market. The closest I've seen is when apps scan to check if the required app is installed, and if not, launches the market and asks the user to download the app. This sounds like a very messy solution. It also begs the question, would they download the game (plugin) first, which then downloads the main shell application? Or would they download the main shell application, and when they navigate to a menu item which says "Play game", then it scans for any installed games, and if none exist, redirects to the market? Also, I'm not even sure if it is possible to dig up the package from another application on the device, and start invoking classes from within (e.g. when you want to launch the game (plugin)) A final option is just to have a 3rd component which is a .jar that each game includes, which effectively contains the entire shell application. Then each game would appear to have the same menu, but it would become a nightmare as soon as you want to update the menu component and have to re-release each game. It would be especially worse if other people released games (plugins) based on the same framework and didn't update them. Is there any other options which I haven't thought of? Has anyone else solved this or seen a solution in any apps they've installed (doesn't have to be games)? cheers.

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Extracting GPS Data from JPG files

- by Peter W. DeBetta

I have been very remiss in posting lately. Unfortunately, much of what I do now involves client work that I cannot post. Fortunately, someone asked me how he could get a formatted list (e.g. tab-delimited) of files with GPS data from those files. He also added the constraint that this could not be a new piece of software (company security) and had to be scriptable. I did some searching around, and found some techniques for extracting GPS data, but was unable to find a complete solution. So, I did...(read more)

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