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Articles indexed in March 2012

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  • Using template questions in a technical interview

    - by Desolate Planet
    I've recently been in an argument with a colleague about technical questions in interviews. As a graduate, I went round lots of companies and noticed they used the same questions. An example is "Can you write a function that determines if a number is prime or not?", 4 years later, I find that particular question is quite common even for a junior developer. I might not be looking at this the correct way, but shouldn't software houses be intelligent enough to think up their own interview questions? I've been to about 16 interviews as a graduate and the same questions came up in about 75% of them. This leads me to believe that many companies are lazy and simply Google: 'Template questions for interviewing software developers' and I look down on that. Question: Is it better to use a set of questions off some template or should software houses strive to be more original and come up with their own interview material? From my point of view, if I failed an interview and went off and looked for good answers to the questions I messed up on, I could fly through the next interview if the questions are the same.

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  • Syntax logic suggestions

    - by Anna
    This syntax will be used inside HTML attributes. Here are a few examples of what I have so far: <input name="a" conditions="!b, c" /> <input name="b" /> <input name="c" /> This will make input "a" do something if b is not checked and c is checked (b and c are assumed to be checkboxes if they don't have a :value defined) <input name="a" conditions="!b:foo|bar, c:foo" /> <input name="b" /> <input name="c" /> This will make input "a" do something if bdoesn't have foo or bar values, and if c has the foo value. <input name="a" conditions="!b:EMPTY" /> <input name="b" /> Makes input "a" do something if b has a value assigned. So, essentially , acts as logical AND, : as equals (=), ! as NOT, and | as OR. The | (OR) is only needed between values (at least I think so), and AND is not needed between values for obvious reasons :) EMPTY means empty value, like <input value="" /> Do you have any suggestions on improving this syntax, like making it more human friendly? For example I think the "EMPTY" keyword is not really appropriate and should be replaced with a character, but I don't know which one to choose.

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  • Why the recent shift to removing/omitting semicolons from Javascript?

    - by Jonathan
    It seems to be fashionable recently to omit semicolons from Javascript. There was a blog post a few years ago emphasising that in Javascript, semicolons are optional and the gist of the post seemed to be that you shouldn't bother with them because they're unnecessary. The post, widely cited, doesn't give any compelling reasons not to use them, just that leaving them out has few side-effects. Even GitHub has jumped on the no-semicolon bandwagon, requiring their omission in any internally-developed code, and a recent commit to the zepto.js project by its maintainer has removed all semicolons from the codebase. His chief justifications were: it's a matter of preference for his team; less typing Are there other good reasons to leave them out? Frankly I can see no reason to omit them, and certainly no reason to go back over code to erase them. It also goes against (years of) recommended practice, which I don't really buy the "cargo cult" argument for. So, why all the recent semicolon-hate? Is there a shortage looming? Or is this just the latest Javascript fad?

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  • To Obtain EPOCH Time Value from a Packed BIT Structure in C [migrated]

    - by xde0037
    This is not a home assignment! We have a binary data file which has following data structure: (It is a 12 byte structure): I need to find out Epoch time value(total time value is packed in 42 bits as described below): Field-1 : Byte 1, Byte 2, + 6 Bits from Byte 3 Time-1 : 2 Bits from Byte 3 + Byte 4 Time-2 : Byte 5, Byte 6, Byte 7, Byte 8 Field-2 : Byte 9, Byte 10, Byte 11, Byte 12 For Field-1 and Field-2 I do not have issue as they can be taken out easily. I need time value in Epoch Time (long) as it has been packed in Bytes 5,6,7,8 and 3 and 4 as follows: (the bit structure for the time value is as follows): Bytes 5 to 8 (32 bit word) Packs time value bits from 0 thru 31 (byte 5 has 0 to 7 bits, byte 6 has 8 to 15, byte 7 has 16 to 23, byte 8 has 24 to 31). the remaining 10 bits of time value are packed in Bytes 3 and byte 4 as follows: byte 3 has 2 bits:32 and 33, and Byte 4 has remaining bits : 34 to 41. So total bits for time value is 42 bits, packed as above. I need to compute epoch value coming out of these 42 bits. How do I do it? I have done something like this but not sure it gives me correct value: typedef struct P_HEADER { unsigned int tmuNumber : 21; unsigned int time1 : 10; // Bits 6,7 from Byte-3 + 8 bits from Byte-4 unsigned int time2 : 32; // 32 bits: Bytes 5,6,7,8 unsigned int traceKey : 32; } __attribute__((__packed__)) P_HEADER; Then in the code : P_HEADER *header1; //get input string in hexa,etc..etc.. //parse the input with the header as : header1 = (P_HEADER *)inputBuf; // then print the header1->time1, header1->time2 .... long ttime = header1->time1|header1->time2; //?? is this the way to get values out? Any hint tip will be appreciated. Environment is : gcc 4.1, Linux Thanks in advance.

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  • How to build a good service layer in ASP.NET?

    - by Swippen
    I have looked through some questions, technologies for building a good service layer but I have some questions regarding this that I need help with. First some information of what I have for requirements. We currently have a number of web applications that talk to each other in a spiderweb looking way (all talking to each other in a confusing way via webservices and database data). We want to change this so that all applications go through a service layer where we can work more with cache and encapsulate common functionality and more. We want this layer to also have a Web API so that 3rd party clients can consume information from the service. The problem I see is that if we build the service layer with say MVC4 Web API don't we need to communicate between the application using the webAPI meaning we have to construct URLs and consume JSON/Xml. That does not sound too effective. I assume a better method would be working with entities and WCF to communicate between the application but then we might loose the Web API magic? So the question is if there is a way to consume a service layer as both a Web API (JSON/XML) and as a more backend service layer with entities. If we are forced to use 2 different service layers we might have to duplicate some functionality and other bad things. Hope the question is clear enough and please ask if you need any more information.

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  • What is a non commital approach to software analysis

    - by dsjbirch
    When I think about software analysis the first thing which comes to mind is SSADM and the UML. But, what I want is a high level view of the system before I commit to a programming paradigm. Where am I going wrong? How do I approach a problem in a high level and generic way before I commit to a paradigm? What are the diagrams/tools available to support me? Edit: Some examples of tools that appear to be what I'm after are... A block diagram - http://en.wikipedia.org/wiki/Block_diagram A data flow diagram - http://en.wikipedia.org/wiki/Data_flow_diagram

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  • Project life cycle management - Maven vs 'manual' approach

    - by jb10210
    I have a question concerning the life cycle management of a/multiple project(s), more specific to the advantages/disadvantages of using technologies such as Maven. Currently we work in a continuous-integration environment but lots of things still need to be manually performed (dependency management, deploying, setting up documentation, generating stats, ...). My impression is that this approach often leads to errors, miscommunications or things just are forgotten. I know and have used Maven in the past but in smaller environments and I was always really enthusiastic about it. But I was wondering if someone could share some insights, experiences, pros, contras, ... about the use of Maven (or similar technology) in larger environments and for multiple projects. I would like to use the suggestions made here to start the debate about moving to the next level in project management!

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  • Generalized Ajax function [migrated]

    - by TecBrat
    Not sure if this question will be considered "off topic". If it is, I'll remove it, but: I hadn't see this yet so I wrote it and would like to know if this is a good approach to it. Would anyone care to offer improvements to it, or point me to an example of where someone else has already written it better? function clwAjaxCall(path,method,data,asynch) { var xmlhttp; if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } if(asynch) { xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { //alert(xmlhttp.responseText); //var newaction=xmlhttp.responseText; //alert('Action becomes '+newaction); return xmlhttp.responseText; } } } if(method=='GET'){path=path+"/?"+data;} xmlhttp.open(method,path,asynch); if(method=='GET'){xmlhttp.send();}else{xmlhttp.send(data);} if (!asynch){return xmlhttp.responseText;} } I then called it like Just Testing <script type="text/javascript" src="/mypath/js/clwAjaxCall.js"></script> <script type="text/javascript"> document.write("<br>More Testing"); document.write(clwAjaxCall("http://www.mysite.com",'GET',"var=val",false)); </script>

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  • Should I be concerned that I can't program very fast without Google? [closed]

    - by seth
    Possible Duplicate: Google is good or bad for programmer? I'm currently in college to be a software engineer, and one of the main principles taught to us is how to learn for ourselves, and how to search the web when we have a doubt. This leads to a proactive attitude - when I need something, I go get it. Recently, I started wondering how much development would I be able to do without internet access and the answer bugged me quite a bit. I know the concept of the languages and how to use them, but I was amazed by how "slow" things were without having the Google to help in the development. Most of the problems I have are related to specific syntax. For example, reading and writing to a file in Java. I have done this about a dozen times in my life, yet every time I need to do it, I end up googling "read file java" and refreshing my memory. I completely understand the code and fully understand what it does, but I am sure that without Google it would take me a few tries to get the code correct. Is this normal? Should I be worried and try to change something in my programming behaviour?

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  • How prevent useless content load on the page in Responsive Design

    - by Ícaro Leandro
    In Responsive Design, we hide elements in the page with @media queries and display: hide in the CSS. Ok, But in my system: Browsers that have less than width: 800px, the layout must hide some content, not only hide, but avoid them load fully. I mean, in access with desktop with more than 800px of screen, the page load fully; In mobile devices, or even in desktop with less than 800px, not load some content. I want to make the page load faster in this browsers. The system are maked in PHP and have some Javascript. Thanks...

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  • Floppy Drive not recognised

    - by Art
    I am a newbie with Ubuntu during the past two weeks, and I believe, that I have made good progress so far. Current setup tasks are completed, like: "Wireless Network, Printer, Thunderbird + Firefox, e-mail", also my local weather station - all setup. Updated files and rearranged the desktop to my liking. The problem I have now is my floppy drive which is not recognized, but the activity light is shown on constantly. I have downloaded the "MakeFloppyDriveAvailableToEveryone" and i am confident that I can follow the instructions to change the floppy drive. However, I do not have an existing fd0 file in /dev/???, but only /dev/fd/ files 0 to 46. Please advise.

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  • Will everything (downloaded fonts, files, apps etc) remains the same when I upgrade from Maverick to Natty?

    - by Suffi
    I'm planning to upgrade from Maverick to Natty, and to try out Unity, but I don't want to lose any settings, customizations and downloads in Maverick. I just want to know, if upgrading alter anything that I said earlier? I don't want to start over with a clean, fresh Natty, and I hope I can keep all of my files and folders and settings in Maverick, and to have them in Natty after the upgrade. Is this possible? Should I use Update Manager to achieve this? And would all my compiz-settings be reset after I upgrade? Sorry for too much questions, but I'm asking this because you know, in Windows, any version upgrade would require the disk to be reformatted. I hope Ubuntu is more convenient than that.

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  • Acting as though the laptop Fn key is pressed

    - by Matt
    I have a Fujitsu laptop and all was working fine until I ended teamviewer. On the keyboard it has a numberpad on some of the letters which you press the Fn button to use. The system is acting like I have the Fn key pressed and I get numbers shown when it should be letters. If I press the Fn key the numbers go to letters. The Fn key is not stuck down. Is there a way to reset keyboard settings or a known fix. The operating system is Ubuntu 11.04 Natty.

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  • Upgrading to Gnome Shell 3.4 in Ubuntu 11.10 broke both Unity and Gnome shell

    - by mac
    I have upgraded my gnome shell to 3.4 in Ubuntu 11.10 through sudo add-apt-repository ppa:ricotz/testing sudo add-apt-repository ppa:gnome3-team/gnome3 sudo apt-get update && sudo apt-get dist-upgrade sudo apt-get install gnome-shell But it broke my system. Gnome shell is completely broken - When I login it just shows desktop wallpaper and nothing else. And importantly Unity is also broken. Attaching the screenshot Some main issues 1)Two menus are appearing now - Global menu as well as application menu 2)Icons on top-right panel are appearing weirdly 3)My Default Ambiance Theme also got screwed. Instead of black color menus, I am seeing white color menus. How do I fix them? Or Do I have an option to revert back to original settings or will reinstalling Unity/Gnome Shell helps ? Thanks

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  • How to go automatically from Suspend into Hibernate?

    - by Sergey Stadnik
    Is it possible to make Ubuntu go into Hibernate state from Suspend, aka "Suspend Sedation"? For example, my laptop is set up to go into a Suspend once I close the lid. If then I don't use it for entire day, the battery goes flat, because even in suspend mode the hardware still consumes a small amount of power, and the battery eventually discharges. What I want is to be able to tell Ubuntu that even if it is suspended, it still needs to go into Hibernate after some hours of inactivity. Windows can do that. Ubuntu can be programmed to go into Standby or Hibernate on timer, but not both. Update: I guess I need to be more specific. What I am looking for is this: When I close the lid, the laptop is put into Suspend. Then, after a pre-determined time (even if the battery is going strong) if I still don't use it, it should put itself into a Hibernate to save battery power.

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  • Cannot remove AWN and desktop messed up

    - by anonymous
    I recently installed AWN after reading an article on OMGUbuntu. It looked very good in the pictures but I didnt like it at all. I couldent remove it and it replaced the status bar and the Applications menu. I went into the settings and told it to not begin on startup, rebooted, and logged into a destop with no menu bar, applications, and I'm limited to a few folders on my desktop and terminal. PLEASE HELP!!

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  • installation problems while installing modelsim6.5f in ubuntu11.10

    - by rakesh
    the following errors are occuring while installing modelsim6.5f in ubuntu11.10 rakeshnettem@rakeshnettem-MacBookPro:~/Desktop/modelSE6.5flinux$ sudo apt-get install install.linux Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package install.linux E: Couldn't find any package by regex 'install.linux' rakeshnettem@rakeshnettem-MacBookPro:~/Desktop/modelSE6.5flinux$ please helpme as soonas possible

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  • I add a PPA but the software does not show up in Ubuntu 11.10 updates nor Software Centre

    - by dunderhead
    Every time I add a PPA I cannot see the package I'm trying to install. I suppose I must be doing something wrong! So here's my latest effort: In a Terminal I typed: sudo add-apt-repository ppa:jeromerobert/misc and that seemed to work correctly Then I typed: sudo apt-get update But when I go to Synaptic or Software Center the application I want to install is not there. Could someone please tell me what I'm doing wrong?

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  • Custom LightDM sessions to launch an application

    - by zachtib
    I'm trying to set up Ubuntu to act as a kiosk running a custom application, and am trying to get a LightDM session built to automatically start it. Ideally, I'd like to have two sessions available from LightDM. The default would start my application fullscreened, and the other would open a minimal desktop in case any configuration (mostly connecting to a wireless network) needed to be done. I've done a lot of research over the last week on custom LightDM & Gnome sessions. I've got a custom greeter written for LightDM that can start either session, but I can't figure out how to add a specific application to the Gnome session that is ultimately started without just putting a launcher in the global startup directory, and I don't want to do that since I don't want the application starting when they open "configuration mode". Another problem I've run into on my current workaround is that the application doesn't fullscreen properly, which makes me think I'm not starting enough of a gnome session (currently it's just metacity, no panel or anything else). Edit: I found a solution. See http://www.webupd8.org/2011/11/make-applications-autostart-only-in.html

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  • Using two ethernet connections (Internet enabled) simultaneously

    - by vedarthk
    I have searched and read over the Internet and also on askubuntu. i am using Ubuntu 11.04 and my question or the thing that I want to achieve is efficient use of both the connections and thus increasing my browsing and downloading speed. I want my system to decide which packet should be routed over which interface. I want to know if this is possible. For example, Is it possible to route alternate packets over the two interfaces ? Please let me know any Internet resource or If I would have to insert any code into the network drivers etc. ?

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  • How to install Syngen?

    - by inLoveWithPython
    I'm using Ubuntu 12.04. I found out that there is a near-obsolete program based on the obsolete Caml Special Light by someone at INRIA ( ftp.inria.fr, directory lang/caml-light ). The program is called Syngen. I need it to create Syntax diagrams. But i am not able to run the binaries that come with it, and i'm not able to compile the source because it needs a compiler called cmlc. Somebody help, i find REALLY less documentation about this in internet.

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  • Restore the Ctrl + Alt + Num Pad windows positioning commands?

    - by holocronweaver
    Using Unity in Ubuntu 12.04, the Ctrl + Alt + Num Pad combination for positioning windows has been fragmented by Ctrl + Alt + 4 (move window to left half of screen) being changed to Super + Left Arrow. A similar change moved Ctrl + Alt + 6 to Super + Right Arrow. Thus one moves windows to corners using Ctrl + Alt combos, but Super combos are needed to move to the left or right. This is more than a convenience problem since the new windows positioning provided by the super key combos seems to give different sizes than the Ctrl + Alt combos they replaced, leading to distracting gaps between windows when you combine the two methods to position three or more windows on one screen. Is there a way to restore the previous behavior so that I can use Ctrl + Alt + Num Pad for all windows positioning?

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  • What zoomable image viewers are there for websites?

    - by tog22
    What zoomable image viewers are there? By these I mean tools that one can embed in a website to let a user zoom in on and pan around a high res image, a canonical example being http://www.zoomify.com/ (see the demo on their home page). Comments on them are welcome. I'm personally looking for something simple and cheap/free which ideally doesn't require Flash, and will accept the answer that comes closest to these requirements. But others who find this question may have different requirements, so all suggestions will be helpful. I have of course searched; I've found Zoomify, http://www.openzoom.org/ and http://code.google.com/p/galapix/ but none seem to meet my requirements, though I could be wrong and others may have more expert comments on these.

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  • Full password not required to access password protected directory?

    - by user617123
    I password protected a directory in cPanel. When I went to access the page in my browser, I accidentally hit backspace on the password before I hit enter. Surprisingly, the page still loaded. I played around with it and realized that I could remove the last 4 or 5 characters and the password would still work. Any more than that and it would fail. I'm just curious why this behavior is happening and whether or not it's anything to worry about?

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  • Why does Google Analytics log a user logging in as an exit?

    - by Justin
    I have custom event tracking set up in Google Analytics that tracks when a visitor registers on the site. The tracking is working fine. However, GA is showing that 100% of users "exit" the site after registering. They aren't exiting however, they are just getting logged in. Is there some reason why a user creating a session by logging in would cause GA to lose track of the visitor and think a new user had arrived? Is there any way to prevent this?

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