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Articles indexed in June 2012

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• About Intellectual-Property agreement with employer

  - by turbo

  In IP agreement IP is define as below Intellectual Property (whether or not patentable and whether or not made during working hours) is defined as but not limited to: all product specifications, developments, inventions, works of authorship, derivative works, technologies, programs, systems, software, mobile applications and other mobile programming interfaces, designs, methodologies, encryptions, ideas, techniques, patents, formulas, processes, concepts, know-how and date made or conceived or reduced to practice or developed during employment period ,remain the property of XXXXXXX[COMPANY_NAME]XXXX or its affiliates. This is the first time I have seen any IP agreement. Isn't it too stringent? or its standard practice across industry?

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• What does SVN do better than git?

  - by doug

  No question that the majority of debates over programmer tools distill to either personal choice (by the user) or design emphasis, i.e., optimizing design according to particular uses cases (by the tool builder). Text Editors are probably the most prominent example--a coder who works on a Windows at work and codes in Haskell on the Mac at home, values cross-platform and compiler integration and so chooses Emacs over Textmate, etc. It's less common that a newly introduced technology is genuinely, demonstrably superior to the extant options. I wonder if this is in fact the case with version-control systems, in particular, centralized VCS (CVS, SVN) versus distributed VCS (git, hg)? I used SVN for about five years, and SVN is currently used where I work. A little less than three years ago, I switched to git (and gitHub) for all of my personal projects. I can think of a number of advantages of git over subversion (and which for the most part abstract to advantages of distributed over centralized VCS), but I cannot think of one contra example--some task (that's relevant and arises in a programmers usual workflow) that subversion does better than git. The only conclusion I have drawn from this is that I don't have any data--not that git is better, etc. My guess is that such counter-examples exist, hence this question.

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• Is BDD actually writable by non-programmers?

  - by MattiSG

  Behavior-Driven Development with its emblematic “Given-When-Then” scenarios syntax has lately been quite hyped for its possible uses as a boundary object for software functionality assessment. I definitely agree that Gherkin, or whichever feature definition script you prefer, is a business-readable DSL, and already provides value as such. However, I disagree that it is writable by non-programmers (as does Martin Fowler). Does anyone have accounts of scenarios being written by non-programmers, then instrumented by developers? If there is indeed a consensus on the lack of writability, then would you see a problem with a tool that, instead of starting with the scenarios and instrumenting them, would generate business-readable scenarios from the actual tests?

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• what exactly is system programming?

  - by kentjh

  I have never understood what system programming meant. The usual definition given is "...doing something close to the Os or extending Os features...". Does using Windows API directly rather than some libraries to say do file i/o make it system programming? Was writing Android OS system programming? If I write something that would expose linux kernel through a console like app on Android am I doing system programming? If I am writing software to control a washing machine am I writing system programming? I am a beginner in programming and this is confusing me to no end. Please explain contrasting it with "application programming".

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• Where should you put constants and why?

  - by Tim Meyer

  In our mostly large applications, we usually have a only few locations for constants: One class for GUI and internal contstants (Tab Page titles, Group Box titles, calculation factors, enumerations) One class for database tables and columns (this part is generated code) plus readable names for them (manually assigned) One class for application messages (logging, message boxes etc) The constants are usually separated into different structs in those classes. In our C++ applications, the constants are only defined in the .h file and the values are assigned in the .cpp file. One of the advantages is that all strings etc are in one central place and everybody knows where to find them when something must be changed. This is especially something project managers seem to like as people come and go and this way everybody can change such trivial things without having to dig into the application's structure. Also, you can easily change the title of similar Group Boxes / Tab Pages etc at once. Another aspect is that you can just print that class and give it to a non-programmer who can check if the captions are intuitive, and if messages to the user are too detailed or too confusing etc. However, I see certain disadvantages: Every single class is tightly coupled to the constants classes Adding/Removing/Renaming/Moving a constant requires recompilation of at least 90% of the application (Note: Changing the value doesn't, at least for C++). In one of our C++ projects with 1500 classes, this means around 7 minutes of compilation time (using precompiled headers; without them it's around 50 minutes) plus around 10 minutes of linking against certain static libraries. Building a speed optimized release through the Visual Studio Compiler takes up to 3 hours. I don't know if the huge amount of class relations is the source but it might as well be. You get driven into temporarily hard-coding strings straight into code because you want to test something very quickly and don't want to wait 15 minutes just for that test (and probably every subsequent one). Everybody knows what happens to the "I will fix that later"-thoughts. Reusing a class in another project isn't always that easy (mainly due to other tight couplings, but the constants handling doesn't make it easier.) Where would you store constants like that? Also what arguments would you bring in order to convince your project manager that there are better concepts which also comply with the advantages listed above? Feel free to give a C++-specific or independent answer. PS: I know this question is kind of subjective but I honestly don't know of any better place than this site for this kind of question. Update on this project I have news on the compile time thing: Following Caleb's and gbjbaanb's posts, I split my constants file into several other files when I had time. I also eventually split my project into several libraries which was now possible much easier. Compiling this in release mode showed that the auto-generated file which contains the database definitions (table, column names and more - more than 8000 symbols) and builds up certain hashes caused the huge compile times in release mode. Deactivating MSVC's optimizer for the library which contains the DB constants now allowed us to reduce the total compile time of your Project (several applications) in release mode from up to 8 hours to less than one hour! We have yet to find out why MSVC has such a hard time optimizing these files, but for now this change relieves a lot of pressure as we no longer have to rely on nightly builds only. That fact - and other benefits, such as less tight coupling, better reuseability etc - also showed that spending time splitting up the "constants" wasn't such a bad idea after all ;-)

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• Why are there so many string classes in the face of std::string?

  - by fish

  It seems to me that many bigger C++ libraries end up creating their own string type. In the client code you either have to use the one from the library (QString, CString, fbstring etc., I'm sure anyone can name a few) or keep converting between the standard type and the one the library uses (which most of the time involves at least one copy). So, is there a particular misfeature or something wrong about std::string (just like auto_ptr semantics were bad)? Has it changed in C++11?

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• Getting started with Team Foundation Server

  - by joe

  At work, we recently started using Team Foundation Server to manage our source code, i have no idea how to use this system. I do not know even know how to check source code in and out. Does anyone know of a step-by-step tutorial on how to work with TFS? Just for basic operations e.g. get latest version, upload your changes, etc. I am accessing it from Visual Studio 2010. I also have access to the TFS web interface.

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• How should I start with Lisp?

  - by Gary Rowe

  I've been programming for years now, working my way through various iterations of Blub (BASIC, Assembler, C, C++, Visual Basic, Java, Ruby in no particular order of "Blub-ness") and I'd like to learn Lisp. However, I have a lot of intertia what with limited time (family, full time job etc) and a comfortable happiness with my current Blub (Java). So my question is this, given that I'm someone who would really like to learn Lisp, what would be the initial steps to get a good result that demonstrates the superiority of Lisp in web development? Maybe I'm missing the point, but that's how I would initially see the application of my Lisp knowledge. I'm thinking "use dialect A, use IDE B, follow instructions on page C, question your sanity after monads using counsellor D". I'd just like to know what people here consider to be an optimal set of values for A, B, C and perhaps D. Also some discussion on the relative merit of learning such a powerful language as opposed to, say, becoming a Rails expert. Just to add some more detail, I'll be developing on MacOS (or a Linux VM) - no Windows based approaches will be necessary, thanks. Notes for those just browsing by I'm going to keep this question open for a while so that I can offer feedback on the suggestions after I've been able to explore them. If you happen to be browsing by and feel you have something to add, please do. I would really welcome your feedback. Interesting links Assuming you're coming at Lisp from a Java background, this set of links will get you started quickly. Using Intellij's La Clojure plugin to integrate Lisp (videocast) Lisp for the Web Online version of Practical Common Lisp (c/o Frank Shearar) Land of Lisp a (+ (+ very quirky) game based) way in but makes it all so straightforward

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• Will there ever be a version of Java which does not perform Type Erasure

  - by user63904

  Type erasure enables Java applications that use generics to maintain binary compatibility with Java libraries and applications that were created before generics Generics were introduced in Java 1.5, so presumably the statement "applications that were created before generics" is referring to Java 1.4? Given that Java 1.4 entered its End Of Life around 2006 and was officially End Of Life'd around 2008. Why is type erasure still being performed in Java 7, etc... Has the statement now become self referential i.e. Type erasure enables Java applications that use generics to maintain binary compatibility with Java libraries and applications that were created with Java versions that perform Type Erasure. Meaning therefore that there will never be a version of Java that doesn't perform Type Erasure.

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• Conditional attribute in XML - most concise solution?

  - by Lech Rzedzicki

  I am tasked with setting up conditional profiling - a method of tagging chunks of XML with an attribute, which will then be used as a conditional value to extract subset of that XML. Have a look at another definition/example: DITA profiling The XML is documents that are equivalent to printed books - i.e. documents that are often looked at by a human, even if indirectly. Therefore I am looking at a few requirements here: 1. keeping the value list brief - so it doesn't affect the readability of the document 2. be able to process with standard XML tools - a space-separated list inside an attribute is still probably fine, but I'd rather not use too much regexp for this 3. be obvious for various users, including 3rd parties, which content goes where 4. Be easy to maintain going forward Therefore one easy solution is: The problem with this: 1. As the list grows the value of the attribute can be a bit verbose 2. One needs to explicitly state every value even if it's a scenario of this vs everything else Therefore I am also looking at other approaches such as: 1. Using + and - modifiers, Apache htaccess style to override the default cascading of profiling - by default all content goes everywhere and if we want to exclude a bit we just say "-kindle". It does require parsing the whole tree, is not supported by editing tools and one needs to regexp the attribute value a bit deeper... 2. Using an intermediate file to define groups of values such as "other" or "non-print", example of this in DITA. It allows concise XML as well as different grouping and values for each document but it does create a certain level of abstraction which may make it a little less obvious for a 3rd party? Altogether, if you received such XML and were tasked to process it, which option you'd rather receive? If you have any experiences like that, even in an unrelated areas such a builds, don't hesitate to comment!

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• Do you accept counter offers when recruiting experienced programmers? [migrated]

  - by MathAttack

  It is VERY hard to find good experienced programmers. Generally if they're performing well, their employers don't want to let them go, and many don't have resumes, let alone resumes in circulation. Let's say you find one who for personal circumstances is available. And let's say you make them an offer that's fair within your salary structure. And let's say you get a modest counter. (5-10% of the total offer side) Do you accept the counter? Part of me says, "Programmers like this are so rare, why let a small sum get in the way of hiring them?" The other part says, "This precedent will set up an annual headache." Thoughts? I know it's not black and white.

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• Create shortcut for PHP

  - by Daniel

  I have XAMPP installed and my PHP is: /opt/lampp/bin/php-5.3.8 Every time I need to execute a PHP file I need to do this: /opt/lampp/bin/php-5.3.8 testando.php Is there another way to execute it besides using symbolic link? I did this on /etc/init.d/: sudo ln -s /opt/lampp/bin/php-5.3.8 php Why when I need to run PHP I have to do this ./php instead of just php? And is there a way to do this without the ./? Like it was installed via apt-get?

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• Encrypted windows partition with ubuntu / Grub configuration

  - by Flow

  guys i would like to encrypt my windows partition only , as i have dual boot windows 7 ultimate and ubuntu 12.04. I would like to encrypt all my windows partition with truecrypt as i suppose you already now , but i was wondering how will it work ? I suppose when i am gonna encrypt the whole partition of windows with true crypt , when i will boot linux grub will not find the partition ?! how can i do for the grub to find my partition windows encrypted ? thanks guys ps : basically more simple , i will encrypt my windows partition only , but grub will not detect anymore my windows partition?

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• How can I make Google show unit conversions by default?

  - by bUbUKid

  When I search for "4 inches in g" on my Windows Firefox I immediately get a unit conversion done by Google that shows up before the actual search results. On my Ubuntu 12.04 system this does not work though. I tried Firefox and Chromium and have no script blockers installed. I also switched off AdBlock Plus for testing but to no avail. I realize that this is not really Ubuntu doing something wrong but: Are there any settings I can modify to make Google show these results? I use them quite frequently and I believe (though I cannot test it anymore) that this used to work on my last Ubuntu System. Maybe there are some script sources that Ubuntu has disabled by default or something like that?

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• When clicking below window title bar in KDE, window dragging is initiated. Can I change this behavior?

  - by hdpq

  this one is regarding KDE in Ubuntu 12.04. The thing is that whenever I click below the window title bar in KDE, the window manager always assumes I want to drag the window, not just activate it. Clicking the title bar activates the window without dragging it just fine, however I sometimes find it hard to click because it's rather narrow :) Is there any way to change this behavior (besides the obvious "make your title bar larger" thing)? I also assume this is happening to Gtk applications only (Firefox, Thunderbird, Synaptic), as I have tried it with several KDE apps (KWrite, KTorrent, Gwenview, Konsole) and noticed no such behavior. Thanks in advance!

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• installed ubuntu 12.04 and no wireless internet at all

  - by Memoq

  I'm extremely new to ubuntu. I installed 12.04 on a laptop that had no os. I've tried following these forums to troubleshoot my internet problems only to be confused by all the steps. I need help. I'm willing to follow any instruction as long as they make sense. Any help would be nice. The equipment i have is a Dell inspiron 1100 laptop wireless card is D link 2.4 dwl -g650 product ar5212/ar5313

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• Recovering problems

  - by Sova

  Just simple question(s): Is it possible to recover one whole folder? It was with photos..and if no, so when recovering, will it recover also files from the folder? (I use Photorec, but if you know better one..). I tried to get back my pics and what has returned wasn't from folder. ? And..is it normal, that it has recovered me the same things for about 5 times, with different size? Thanks in advance.

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• What does this regex mean and why

  - by Kalec

  $ sed "s/\(^[a-z,0-9]*\)\(.*\)\( [a-z,0-9]*$\)/\1\2 \1/g" desired_file_name I apreciate it even if you only explain part of it or at lest structure it with words as in s\alphanumerical_at_start\something\alphanumerical_at_end\something_else\global Could someone explain what that means, why and are all regEx so ... awful ? I know that it replaces the first lowcase alphanumerical word with the last one. But could you explain bit by bit what's going on here ? what's with all the /\ and \(.*\)\ and everything else ? I'm just lost. EDIT: Here is what I do get: (^[a-z0-9]*) starting with a trough z and 0 trough 9; and [a-z,0-9]*$ is the same but the last word (however [0-9,a-z] = just first 2 characters / first character, or the entire word ?). Also: what does the * or the \(.*\)\ even mean ?

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• system problem! ubuntu 12.4

  - by Juan Riggioni

  when I was upgrading to ubuntu 12.4 I had to leave and accidentally turned off the laptop in half update. When lit it not entered the system, it put the screen in black and looked just the mouse. I had to install ubuntu 12.4 from a dvd drive apart, when I installed told me that was already installed, it saids that if you wanted to install ubuntu 12.4 with ubuntu 12.4 and I did it, but now I have two ubuntu 12.4 and also can not find my files . What I can do?

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• Having problem to login after upgrading from 11.10 to 12.04

  - by LinuxIsMyFriend

  I just update to 12.04 from 11.10 and I get to the login screen w/o problems. When I enter my password the screen turns black and returns to the login screen half a second later. There is a related question out there which was solved by creating more space on the disk but my disks (or rather partitions) are all below 30%. I can log in as guest. I can also login at the cmd prompt (going to tty with Alt+Ctrl+F1) with my normal user credentials. When logged in as guest I can also install programs using my normal account password. There is the normal authentication error when I mistype my password so I'm also sure the password works. Any suggestions?

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• Get rid of 0.5s latency when playing audio over Bluetooth with A2DP

  - by brillout.com

  As described in the title I experience a half a second delay when playing audio over Bluetooth with A2DP. This makes watching movies not possible as the sound is not synchronised with the video. I'm not sure if the delay is caused by the Bluetooth connection, the A2PD protocol, or the A2DP implementation on my Ubuntu 12.04. Anyways, is this a normal lag? Is there a way to play audio over Bluetooth without any latency?

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• How to stop Cairo Dock minimizing Conky on Show Desktop?

  - by César

  Every time I use Cairo Dock Show Desktop add-on Conky minimizes: I've read about the own_window_type override option on .conkyrc and it seems to work for some people but it doesn't work for me. Conky won't show up if I use this option (it is currently set to own_window_type normal). Any suggestions? .conkyrc # Conky settings # background no update_interval 1 cpu_avg_samples 2 net_avg_samples 2 override_utf8_locale yes double_buffer yes no_buffers yes text_buffer_size 2048 #imlib_cache_size 0 temperature_unit fahrenheit # Window specifications # own_window yes own_window_type normal own_window_transparent yes own_window_hints undecorate,sticky,skip_taskbar,skip_pager,below border_inner_margin 0 border_outer_margin 0 minimum_size 200 250 maximum_width 200 alignment tr gap_x 35 gap_y 55 # Graphics settings # draw_shades no draw_outline no draw_borders no draw_graph_borders no # Text settings # use_xft yes override_utf8_locale yes xftfont Neuropolitical:size=8 xftalpha 0.8 uppercase no temperature_unit celsius default_color FFFFFF # Lua Load # lua_load ~/.lua/scripts/clock_rings.lua lua_draw_hook_pre clock_rings TEXT ${font Neuropolitical:size=42}${time %e} ${goto 100}${font Neuropolitical:size=18}${color FF3300}${voffset -75}${time %b} ${font Neuropolitical:size=10}${color FF3300}${voffset 15}${time %A}${color FF3300}${hr} ${goto 100}${font Neuropolitical:size=15}${color FFFFFF}${voffset -35}${time %Y} ${font Neuropolitical:size=30}${voffset 40}${alignc}${time %H}:${time %M} ${goto 175}${voffset -30}${font Neuropolitical:size=10}${time %S} ${voffset 10}${font Neuropolitical:size=11}${color FF3300}${alignr}HOME${font} ${font Neuropolitical:size=13}${color FFFFFF}${alignr}temp: ${weather http://weather.noaa.gov/pub/data/observations/metar/stations/ LQBK temperature temperature 30} °C${font} ${hr} ${image ~/.conky/logo.png -p 165,10 -s 35x35} ${color FFFFFF}${font Neuropolitical:size=8}Uptime: ${uptime_short} ${color FFFFFF}${font Neuropolitical:size=8}Processes: ${processes} ${color FFFFFF}${font Neuropolitical:size=8}Running: ${running_processes} ${color FF3300}${goto 125}${voffset 27}CPU ${color FFFFFF}${goto 125}${cpu cpu0}% ${color FF3300}${goto 125}${voffset 55}RAM ${color FFFFFF}${goto 125}${memperc}% ${color FF3300}${goto 125}${voffset 56}Swap ${color FFFFFF}${goto 125}${swapperc}% ${color FF3300}${goto 125}${voffset 57}Disk ${color FFFFFF}${goto 125}${fs_used_perc /}% ${color FF3300}${goto 130}${voffset 55}Net ${color FFFFFF}${goto 130}${downspeed eth0} ${color FFFFFF}${goto 130}${upspeed eth0} ${color FF3300}${font Neuropolitical:size=8}${alignr}${nodename} ${color FF3300}${font Neuropolitical:size=8}${alignr}${pre_exec cat /etc/issue.net} $machine ${color FF3300}${font Neuropolitical:size=8}${alignr}Kernel: ${kernel} ${hr}

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• Right-click acts too fast - No Fix Yet, Any Workaround?

  - by Aahan Krish

  When I click the right mouse button (anywhere, be it - desktop, browser, console, etc.), the right-click context menu pops up so quickly that the very *first* option in the menu gets clicked. This happens too often to take it easy. This issue has been brought up a couple of times on Ask Ubuntu, but with no fix whatsoever. This is a very low priority issue for the Ubuntu team, I believe? (How could they?!) Is there at least a workaround for the issue? Ubuntu is almost unusable for me as it is now. PS: I have a new mouse. So, please don't go about suggesting that I get a new one - - everything's working fine on Windows 7, so should be the case with ubuntu 11.10, which it is not.

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• Xubuntu keyboard doesn't work properly

  - by OmPS

  I have installed xubuntu 12.04 but after installation my buttons "d" and "e" doesn't respond properly. When I press "d" on the keypas, it enters automatically giving error as d:command not found, same happenes with Caps lock is on. While presssing "e" i get e+ or +e. Don't know why this weired behaviour, i tired reinstalling xubuntu, but the same think happens again. My keyboard is English(US). Regards,

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• Chrome window controls in xubuntu 12.04

  - by Norbert

  I'm a long time ubuntu 10.04 LTS user, very used to having window controls on top left borders. New computer with new video card requires newer kernel. Unity doesn't suit and much googling turned up recommendations for xubuntu. Installed 12.04 and first aggravation is window controls at upper right a la Windows. No problem ... Settings Manager - Windows Manager - rearrange button layout Fixes everything until ... I abandoned firefox long ago because of memory leak issues and general fat. I fetch a current version of chrome (19.0.1084.52) and install. Once adblock is added and it's the default browser, everything's great. Except ... Alone among all applications, chrome will not honour the window manager's preferred button layout. Buttons are at upper right no matter what I try. Uninstall and then reinstall: nope. Trawl through /home/user/.config/google-chrome/* looking for a likely setting: nope. Search the web: nothing useful. How do I get chrome's window decoration in sync? Thanks very much for any and all help.

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