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Articles indexed Thursday November 17 2011

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• What happened this type of naming convention?

  - by Smith

  I have read so many docs about naming conventions, most recommending both Pascal and Camel naming conventions. Well, I agree to this, its ok. This might not be pleasing to some, but I am just trying to get you opinion why you name you objects and classes in a certain way. What happened to this type of naming conventions, or why are they bad? I want to name a struct, and i prefix it with struct. My reason, so that in IntelliSense, I see all the struct in one place, and anywhere I see the struct prefix, I know it's a struct: structPerson structPosition anothe example is the enum, although I may not prefix it with "enum", but maybe with "enm": enmFruits enmSex again my reason is so that in IntelliSense, I see all my enums in one place. Because, .NET has so many built in data structures, I think this helps me do less searching. Please I used .NET in this example, but I welcome language agnostic answers.

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• What resources about business should an internal IT department programmer be familiar with

  - by Badger

  I am developer / analyst in an internal IT department at a medium sized business. I have to deal with business people all the time and many of the things I create can have profound impacts on the business. I am starting to regret not taking any business classes in college because I don't understand the first thing about running a business so I don't always understand what people are wanting, the best I can do is "think through it". Does anyone have suggested methods of learning this stuff, maybe some resources. And please don't just say to ask people who work here. I have tried that before and I get no where.

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• Using sscanf for the dynamic delimiters (inputted by users) in parsing an input string in C? [migrated]

  - by Zuhakasa

  I'm encountering a problem in parsing a string using sscanf() function. My function gets 2 string parameters. One for input string and another one for a dynamic list of delimiters. How can I use sscanf to parse the input string with the defined delimiters inputted by users. For example: Myfunction(char * input_string, char * delimiter_list){ scanf("%s", input_string); scanf("%s", delimiter_list); sscanf(input_string, ???...); ................ }

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• What are the benefits of PHP?

  - by acme

  Everybody knows that people that have prejudices against certain programming languages. Especially PHP seems to suffer from problems of its past and some other things (like loose types) and is often called a non-serious programming language that should not be used for professional applications. In that special case PHP: How do you argue using PHP as your chosen programming language for web applications? What are the benefits, where is PHP better than ColdFusion, Java, etc.?

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• Get 100 highest numbers from an infinite list

  - by Sachin Shanbhag

  One of my friend was asked this interview question - "There is a constant flow of numbers coming in from some infinite list of numbers out of which you need to maintain a datastructure as to return the top 100 highest numbers at any given point of time. Assume all the numbers are whole numbers only." This is simple, you need to keep a sorted list in descending order and keep a track on lowest number in that list. If new number obtained is greater than that lowest number then you have to remove that lowest number and insert the new number in sorted list as required. Then question was extended - "Can you make sure that the Order for insertion should be O(1)? Is it possible?" As far as I knew, even if you add a new number to list and sort it again using any sort algorithm, it would by best be O(logn) for quicksort (I think). So my friend told it was not possible. But he was not convinced, he asked to maintain any other data structure rather than a list. I thought of balanced Binary tree, but even there you will not get the insertion with order of 1. So the same question I have too now. Wanted to know if there is any such data structure which can do insertion in Order of 1 for above problem or it is not possible at all.

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• What is the difference between being an IT in investment bank and a professional IT company?

  - by deepsky

  Suppose there are two positions: IT in investment bank: developer for the infrastructure or the platform a famous IT company: embedded developer, linux As far as I understand, since in the investment bank not everyone will have the chance to work for the core trading system, most people just do the same job as they do in a normal IT company. And some of the tasks can even be outsourced. But in a professional IT company, you will have more chance to practice your coding skill and enhance your professional knowledge. So there are many choices when you want to change your job while the IT in invest bank not. Is this correct?

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• Do programmers have a higher IQ? [closed]

  - by Laurent Pireyn

  Do programmers have a higher intellectual quotient than the average 100? Has anybody conducted studies on that topic? Don't get me wrong! I consider IQ as a limited measure that only evaluates the analytical part of one's intelligence. Furthermore, I think that intelligence is only one among many characteristics, and that it should not be used to judge or discriminate people. My question should be read in that context.

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• What is the history of why bytes are eight bits?

  - by DarenW

  What where the historical forces at work, the tradeoffs to make, in deciding to use groups of eight bits as the fundamental unit ? There were machines, once upon a time, using other word sizes, but today for non-eight-bitness you must look to museum pieces, specialized chips for embedded applications, and DSPs. How did the byte evolve out of the chaos and creativity of the early days of computer design? I can imagine that fewer bits would be ineffective for handling enough data to make computing feasible, while too many would have lead to expensive hardware. Were other influences in play? Why did these forces balance out to eight bits? (BTW, if I could time travel, I'd go back to when the "byte" was declared to be 8 bits, and convince everyone to make it 12 bits, bribing them with some early 21st Century trinkets.)

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• importing a VCard in the address book , objective C [migrated]

  - by user1044771

  I am designing a QR code reader, and it needs to detect and import contact cards in vCard format. is there a way to add the card data to the system Address Book directly, or do I need to parse the vCard myself and add each field individually? I will be getting the VCArd in a NSString format I tried the code below (from a different post) and didn't work -(IBAction)saveContacts{ NSString *vCardString = @"vCardDataHere"; CFDataRef vCardData = (__bridge_retained CFDataRef)[vCardString dataUsingEncoding:NSUTF8StringEncoding]; ABAddressBookRef book = ABAddressBookCreate(); ABRecordRef defaultSource = ABAddressBookCopyDefaultSource(book); CFArrayRef vCardPeople = ABPersonCreatePeopleInSourceWithVCardRepresentation(defaultSource, vCardData); for (CFIndex index = 0; index < CFArrayGetCount(vCardPeople); index++) { ABRecordRef person = CFArrayGetValueAtIndex(vCardPeople, index); ABAddressBookAddRecord(book, person, NULL); CFRelease(person); } CFRelease(vCardPeople); CFRelease(defaultSource); ABAddressBookSave(book, NULL); CFRelease(book); } I have searched a bit and fixed the code and here how it looks like it doesn t crash anymore but it doesn t save the VCard (NSString format) in the address book , any clues ?

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• Which .NET REST approach/technology/tool should I use?

  - by SonOfPirate

  I am implementing a RESTful web service and several client applications that are mostly in Silverlight. I am finding a litany of options for developing both the server-side and client-side of the API but am not sure which is the best approach. I'm concerned about stability as well as a platform that will continue to exist a few months from now. We started using the REST Starter Kit with .NET 3.5 but moved to the new WCF Web API when updating to .NET 4.0. All of their documentation indicates that WCF Web API is the replacement for the RSK. However, Web API is only in Preview 4 and does not include support for Silverlight or Windows Phone 7 clients (yet). WCF Web API looks like a wrapper on top of the WCF WebHttp Services stuff provided in the System.ServiceModel.Web library which makes me think that maybe it would be simpler to just go with the built-in stuff but Web API does offer some nice features. I am specifically tied-up trying to determine the best course for the client-side. My main requirement is that I need to support deserializing into my client-side objects quickly and easily. The Web API offers a nice client library but doesn't have a Silverlight version. I'd like to use the latest approach and the toolset that is being actively developed and supported. Is the REST Starter Kit really obsolete? Has anyone had any success implementing the WCF Web API toolkit? Is there merit to using either of these over the built-in WCF WebHttp Services features found in System.ServiceModel.Web? Is there a single solution that works for any client (web, Silverlight, etc.)? What suggestions do you have?

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• Is a program linked against an LGPL library in linux still under GPL?

  - by Jonathan Henson

  If I were to write say, an embeded linux video server, how much of the code do I have to offer to someone who requests the source? Do I have to offer the code that directly links against the GPL covered code or do I have to offer all code? For instance, if I use gstreamer, or any other LGPL code, on a linux platform in my program, does all of my code become under GPL simply because somewhere in the chain, the LGPL program had to link agaist GPL code? I guess this is an extension of the question. Can you write a C library that compiles in linux that does not become subject to GPL?

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• Uninstall Caribou?

  - by Icedrake

  I just installed the Gnome Tweak Tool in order to change my icon theme to Faenza, but it seems to have installed some other program named Caribou, which I think is an onscreen keyboard program, with it. This is absolutely useless for me, and frankly, I hate the fact that it was installed silently and without my permission. When I go to uninstall it, it says that it's part of gnome-shell and requires the un-installation of that as well. What do I do?

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• USC gives "failed to download package files" message - how to fix?

  - by DrT

  Trying to download a program (Advanced Settings aka Gnome Tweak tool) from USC and getting this error "Failed to Download Package Files: check your internet connection". Under details is info: Failed to fetch http://ch.archive.ubuntu.com/ubuntu/pool/main/n/network-manager/gir1.2-networkmanager-1.0_0.9.1.90-0ubuntu4_i386.deb 404 Not Found Question: how to fix? Note: I tried downloading another program from USC (GnuCash) and it worked fine. And my internet connect is working fine (able to surf the web, etc) and Ubuntu is fully up to date and is able to download updates. It seems to be a problem just getting the "Advanced Settings" program. (Ubuntu 11.10).

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• How to re-install Software Center?

  - by Icedrake

  I've had a problem with Software Center for a few weeks, where it has just refused to delete a removed PPA from its "All Software" and "Installed Software" drop-down menus. I've tried many suggested solutions, none have worked, so I've finally decided to re-install Software Center if its possible. How do you do this and is it risky to your computer (i.e. will re-installing it cause all sorts of issues)?

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• Screen becomes black after pressing dash or alt-tab

  - by cegerxwin

  I did an upgrade from 11.04 to 11.10. Unity 3d becomes a black screen after pressing the dash-button or after pressing alt-tab to switch between open windows. I can see the panel on the top(lock,sound,..) and the panel on the left (launcher) but the rest is black. It looks like a maximised black window. The open Windows are active but I cant see them. I logout by pressing logout in the right top corner and pressing enter (because logout is default focused on the dialogue screen) and leave unity3d. Unity3d worked with 11.04 very good. If I press the dash button the dash looks like an 16-Bit or 8-Bit window and buttons for maximise, minimise and close are displayed and looks inverted. I have rebooted my notebook just now and log in to Unity 3D and tested some features of Unity and everything works well. The black thing is only a layer. I can use my desktop but cant see anything because of the layer, but everything works. It seems so, that a layer appear when pressing dash or alt-tab and does not disappear when close dash or choose a running app with alt-tab. you will see the necessary info related video problems: Unity support: /usr/lib/nux/unity_support_test -p OpenGL vendor string: X.Org R300 Project OpenGL renderer string: Gallium 0.4 on ATI RC410 OpenGL version string: 2.1 Mesa 7.11-devel Not software rendered: yes Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: yes xorg glxinfo lspci -nn | grep VGA 01:05.0 VGA compatible controller [0300]: ATI Technologies Inc RC410 [Radeon Xpress 200M] [1002:5a62]

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• Keep Xubuntu Network Manager from overwriting resolv.conf

  - by leeand00

  How do I keep Xubuntu 11.10 from overwriting resolv.conf everytime I reboot my machine? Everytime I reboot, I get an overwritten resolv.conf that has the words # Generated by Network Manager and no nameservers specified. I ran the following to get rid of Network Manager, but it's still replacing my resolv.conf when I restart the machine. sudo apt-get --purge remove network-manager sudo apt-get --purge remove network-manager-gnome sudo apt-get --purge remove network-manager-pptp sudo apt-get --purge remove network-manager-pptp-gnome

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• HP pavilion dv4 1413la

  - by Pablo Bastidas

  I had Ubuntu 10.10 in my Laptop Hp Pavilion dv4 1413la one year ago, I bought a Lenovo and I gave my wife the HP. She had Windows 7 but she said me that I intalled Ubuntu 11.11. I installed ubuntu 11.11 in the HP but i had problems. It freezing frecuently and i don't know What happen The touch mouse work for a moment an after doesn't work y kill genome-session and work again Please help me. PD: I don't speak English, I speak Spanish, I was trying, excuse me if I write bad.

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• Desktop runs very slick, animations are all fast and flawless. Moving windows around, however, is very laggy. Why?

  - by Muu

  This isn't a question about Ubuntu being laggy in general - not at all, in fact, it's very slick and fast for me. Clicking the "Workspace Switcher" in the dock performs the animation immediately and very smoothly. Switching between workspaces with the arrow keys - again, flawlessly. My computer has a resolution of 2560x1440 on a 27" display (no, not an Apple product - though my monitor has the same panel that Apple use in their cinema displays). It's powered by an Nvidia GeForce GTX 470 - easily enough to handle it - and an Intel i3. Hardware is not the issue. I am running Ubuntu 11.10 (upgraded from 11.04). I had the same issue in 11.04. I'm running the "NVIDIA accelerated graphics driver (post-release updates) (version current-updates)" from the additional drivers dialogue. Two drivers have been suggested to me via that dialogue and I've tried both - same effect with each. The driver is "activated and currently in use". Any other information required, let me know and I'll post it. I'm a programmer who works with Linux daily (both as a job and as an interest) so technical instructions are fine. I've noticed that Compiz uses a lot of CPU when moving windows around and it's memory usage is relatively high (though possibly expected for Compiz): 1671 user 20 0 478m 286m 33m S 1 7.3 12:44.05 compiz And one more thing - occasionally moving windows around is fast. But it only happens when all applications are closed, and even then it sometimes doesn't. Something must be interfering, but what? I'll try and find out but in the meantime, any suggestions are much appreciated :-)

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• Broadcom wireless card disappears after restart

  - by user10854

  I used 'additional drivers' to install 'Broadcom STA wireless driver' and it returns an error. Within jockey.log it says the following numerous times. 2011-02-14 21:24:06,945 DEBUG: BroadcomWLHandler enabled(): kmod disabled, bcm43xx: blacklisted, b43: blacklisted, b43legacy: blacklisted After it returns the error the network card will work temporarily until I restart the laptop. When I restart I got to go through the procedure again of trying to activate the driver, returns an error however it works temporarily. The network card is as follows on a Dell Inspiron 1545: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] Rev 01 I have been trying to solve this myself for many hours. Any help is appreciated/

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• Broadcom BCM4313 takes ages to connect

  - by Drazgo

  I'm having issues with my broadcom BCM4313 wireless adapter. Everything works just fine when connected (with additional drivers & Connman), but it takes about 5 minutes to connect to my network when i just started my computer! When resuming from hibernation it goes very quick though, so just when I boot my pc it's taking forever... This is what I found in the dmesg output: [ 16.778057] eth1: Broadcom BCM4727 802.11 Hybrid Wireless Controller 5.60.48.36 [ 16.808768] type=1400 audit(1295859939.727:2): apparmor="STATUS" operation="profile_load" name="/sbin/dhclient3" pid=833 comm="apparmor_parser" [ 16.808815] type=1400 audit(1295859939.727:3): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient3" pid=799 comm="apparmor_parser" [ 16.808825] type=1400 audit(1295859939.727:4): apparmor="STATUS" operation="profile_replace" name="/sbin/dhclient3" pid=826 comm="apparmor_parser" [ 16.809367] type=1400 audit(1295859939.727:5): apparmor="STATUS" operation="profile_load" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=833 comm="apparmor_parser" [ 16.809415] type=1400 audit(1295859939.727:6): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=799 comm="apparmor_parser" [ 16.809435] type=1400 audit(1295859939.727:7): apparmor="STATUS" operation="profile_replace" name="/usr/lib/NetworkManager/nm-dhcp-client.action" pid=826 comm="apparmor_parser" [ 16.809705] type=1400 audit(1295859939.727:8): apparmor="STATUS" operation="profile_load" name="/usr/lib/connman/scripts/dhclient-script" pid=833 comm="apparmor_parser" [ 16.809755] type=1400 audit(1295859939.727:9): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=799 comm="apparmor_parser" [ 16.809769] type=1400 audit(1295859939.727:10): apparmor="STATUS" operation="profile_replace" name="/usr/lib/connman/scripts/dhclient-script" pid=826 comm="apparmor_parser" [ 16.844083] alloc irq_desc for 22 on node -1 [ 16.844087] alloc kstat_irqs on node -1 Any ideas how come? Thanks in advance!

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• Nautilus does not connect via FTP after upgrade to Oneric

  - by user15533

  Since I have upgraded to Oneric Nautilus is not able any more to connect to FTP-Servers. Trying to connect it tells me, I should use a different client. Original message in German: Fehler: Fehler beim Verbinden: Verbindungsaufbau abgelehnt Bitte wählen Sie einen anderen Betrachter und versuchen Sie es erneut. Does anybody know, what the hell that mean? Thanks for helping! I worked for year using nautilus for some simple FTP transactions...

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• Set default owner/user

  - by Daniel Hollands

  I'm a web developer, and so have set-up an old machine in the office as an Ubuntu Server, for the purposes of testing websites. I've set-up LAMP and have created a /var/www folder, from which all my local sites are served. The issue is that of user permissions, i.e. any files that I copy into that folder (from my Windows machine via the network) automatically take on me (daniel) as their owner. The problem is that I want www-data to become the owner. I did some research and saw that it should be possible to use setuid (and setgid) to automatically set www-data as the owner of all files put into /var/www automatically, so far I've not had any luck making it work. Can someone help please? Thank you UPDATE: Would this do what I want it to do? Default file permissions for php user www-data UPDATE 2: I've kinda fixed my issue by changing my samba settings. Using Webmin, I was able to go in and change the default settings (as seen here: http://imageshack.us/photo/my-images/521/captureon.png/)

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• Layout Columns - Equal Height

  - by Kyle

  I remember first starting out using tables for layouts and learned that I should not be doing that. I am working on a new site and can not seem to do equal height columns without using tables. Here is an example of the attempt with div tags. <div class="row"> <div class="column">column1</div> <div class="column">column2</div> <div class="column">column3</div> <div style="clear:both"></div> </div> Now what I tried with that was doing making columns float left and setting their widths to 33% which works fine, I use the clear:both div so that the row would be the size of the biggest column, but the columns will be different sizes based on how much content they have. I have found many fixes which mostly involve css hacks and just making it look like its right but that's not what I want. I thought of just doing it in javascript but then it would look different for those who choose to disable their javascript. The only true way of doing it that I can think of is using tables since the cells all have equal heights in the same row. But I know its bad to use tables. After searching forever I than came across this: http://intangiblestyle.com/lab/equal-height-columns-with-css/ What it seems to do is exactly the same as tables since its just setting its display exactly like tables. Would using that be just as bad as using tables? I honestly can't find anything else that I could do. edit @Su' I have looked into "faux columns" and do not think that is what I want. I think I would be able to implement better designs for my site using the display:table method. I posted this question because I just wasn't sure if I should since I have always heard its bad using tables in website layouts.

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• Using CSS3 is a bad practice? [closed]

  - by Qmal

  Possible Duplicate: Should I use HTML5 and/or CSS3 to build my website? I just want to know if it's considered as a "bad practice" to use things like rounded corners, gradients and so on... I understand that there are bots and crawlers that do not process CSS, but they don't need to. And nowadays most people use browsers that can process CSS3 with no problem. So should I make my buttons and shadows and such look pretty with CSS3 or with images?

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• Unable to download microsoft excel files from a IIS SSL site

  - by Jeffrey

  The web master at my corporation added SSL to the web site and now none of my users can download Microsoft word and xcel files the sites generates. According to Microsoft the following must be down. Web sites that want to allow this type of operation should remove the no-cache header or headers. Typical of MS they don't tell you what to do, how to do it, or what the best practice is. The web master says its a web config setting. But all i can finds is <configuration> <appSettings/> <connectionStrings/> <system.web> <httpRuntime sendCacheControlHeader="false"/> and I don't know if this is the best way to achieve the result. I would greatly appreciate some advice on this subject.

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