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• How to deal with OOP design problems in interviews?

  - by haps10

  This is a question where I seek guidance from fellow/senior developers to get into my dream company - it's a pioneer in OOP and Agile. I've already failed once to clear an interview. One part I feel most challenging is to come up with a proper Object Oriented design(classes, interfaces, methods, interactions etc.) in a very short time for certain situations like Pacman, Game Of Life and so on. As the problems are unprecedented ones - my approach is mostly to try different things and then make decisions - which they feel is not clear and not what they expect from a developer with 5+ years of experience. I've already studied a few books on patterns, OOP - it didn't help me much and I think it'll take a bit more than that. Could some one please guide on what specifically shall I practice so that I can do better at design problems as above. I want to refine my approach and have a better thought process.

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• "Never do in code what you can get the SQL server to do well for you" - Is this a recipe for a bad design?

  - by PhonicUK

  It's an idea I've heard repeated in a handful of places. Some more or less acknowledging that once trying to solve a problem purely in SQL exceeds a certain level of complexity you should indeed be handling it in code. The logic behind the idea is that for the large majority of cases, the database engine will do a better job at finding the most efficient way of completing your task than you could in code. Especially when it comes to things like making the results conditional on operations performed on the data. Arguably with modern engines effectively JIT'ing + caching the compiled version of your query it'd make sense on the surface. The question is whether or not leveraging your database engine in this way is inherently bad design practice (and why). The lines become blurred further when all the logic exists inside the database and you're just hitting it via an ORM.

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• Unity Gone, have tried everything 12.04

  - by Darrin

  Hello I have checked a few forums and tried much of the advice given, however nothing has worked so far. I dont know how it happened but when I boot up, I get the login screen to select user and once I select my user and input pw my screen displays my background inage but never loads cairo dock or the unity sidebar. I have tried unity --reset from tty1 and get asked if im actually trying to do a reset from a tty. I have also tried ctrl+ alt + T after logging in to get a terminal and tried to open ccsm to restart unity from there and that has not worked either. Any ideas?.....Thank You in advance for any help you can offer. Darrin

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• SEO Influenc search result per device class (mobile/desktop)

  - by user32224

  We're currently building a new responsive website and while working on the site map figured that we don't want to show certain sections on mobile devices. This can be easily done by hiding the navigation parts using css/media queries. However, trouble is that the hidden sites would still show up in search engines' search results. If a user happens to click on one of these links she might happen to see a badly formatted page as we'd use desktop/tablet only code to show images and video. Is there any way to "influence" to exclude certain pages if the search is done on a mobile device? Do search engines crawl pages once or with a device specific view twice? Could we set a noindex meta tag for a specific device class?

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• Windows Phone App with 4SQ

  - by Nuttanon Pornpipak

  I'm want to create a my own Coffee shop app for semester's project. It's Windows Phone App. The App can i.e. view who is check-in here now , view menu , view photo by using 4SQ Endpoint APIs. And my problem is I don't know how to start it...which book i should read about C# and I don't know which knowledge (keyword) should i google it i.e. GET POST METHOD , JSON I ever used 4SQ Endpoint APIs once with javascript (jquery) $.ajax{(.....)} to get data from 4SQ Endpoint APIs So I googled and found JSON.NET Class but I don't know how to use it because i never programming in C# I'm just begin programming. I can programming in C only. Thank you Sorry for my bad grammar

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• Boot screen appears to be asking a question but garbled

  - by mark kaylor

  I'm running 12.04 Precise Pangolin, Kernel 3.2.0-32 w/ GNOME 3.4.2 I perused the prior questions/answers and did not find exactly the same problem, I am concerned that AUTOFSCK, Grub or some other critical event that needs some attention ? Any idea on how to get my video clean during boot? Once I get past the boot screen the video driver/card, etc is performing beautifully ! Here is a photo of the boot screen; nVidia GeForce CARD INFORMATION (lspci -vvv) 01:00.0 VGA compatible controller: NVIDIA Corporation G72 [GeForce 7300 LE] (rev a1) (prog-if 00 [VGA controller]) Subsystem: Gateway 2000 Device 3a07 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast TAbort- SERR- [disabled] Capabilities: Kernel driver in use: nvidia Kernel modules: nvidia_173, nouveau, nvidiafb Thanks for your help/advice.

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• Ubuntu 14.10 no GUI or term login

  - by Lito

  I have updated yesterday my Ubuntu 14.10 installation with apt-get dist-upgrade. I was working all afternoon and after that I have rebooted computer. Once done it, lightdm doesn't starts (only gnome logo) and I can not view any of Ctrl + Shift + [1-6] terminals (cursor is blinking). I have read a lot of posts with no success: nividia/intel conflicts (I have a laptop with an Intel graphic card) I have enabled nomodeset and tried all this options My computer boots to a black screen, what options do I have to fix it? I have repaired grub I can load recovery/livecd/windows and mount partitions and network without problem I have all packages and system updated Here my logs. X11 not shows any error or problem, is loading all needed drivers without problem. How can I raise the level of debug? Best regards.

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• C# to develop Android app

  - by opt

  I am learning C# and I'm wondering if there is the potential to develop an Android app that satisfy the need that I'm going to explain. I would basically need an app that, when launched retrieves some data from a webpage (i.e. realtime stock prices), trim the xml to find the data i need and store this value into a variable. Then some calculation is performed on this data and the result is sent via email. It is already possible to launch an app automatically based on some conditions (e.g. every 5 minutes) by using the software Tasker. It is actually also possible to retrieve the data from a webpage and save to a Tasker variable or to a txt file somewhere in the phone (or Dropbox/Box...). But I would like to do that directly via an app so that everything is done "internally" once the app is launched. If that's possible, how should I proceed? Is there any good reference I can use to address my need?

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• No Mouse Pointer - ubuntu 13.10

  - by Paul

  just installed 13.10 on my HP Envy M6 laptop and have no mouse pointer. My USB mouse does not work and neither does the track pad. When I booted from a USB key everything worked OK but once installed it seems to have broken the mouse. Unlike other posts, there is no flicker, it simply doesn't work at all. My laptop is an i5 with 6gb and dual Intel and AMD radeon graphics. Any help would be gratefully received as I really can't stand Windows 8 any longer. Thanks.

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• updating from 8.04 to a newer version?

  - by user175802

  I have an old system. It doesn't have a DVD drive, and I think the cd drive is a bit wonky. The only disk that I have been able to get to install is an old (official) 8.04 Kubuntu disk. No disk that I've burned on a few systems works. They check out, but they don't seem to survive the install (another issue). I thought once I got a version on that I could update over the web, but no luck. It appears EOL. No updates seem to be available, or software to install. Is there a way? I'd like to get it to as new a version as possible. The next step would be to pull the drive and get a new one, but I'd rather not.

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• Drag and Drop Team Selection

  - by davidjwest

  I have a Fantasy F1 Website, currently users select their teams using dropdown menus. It works OK but isn't as user friendly as I would like. I would like to implement a drag and drop type of system, there's jQuery code out there that would go part of the way to allowing me to do this: http://jqueryui.com/demos/draggable/ But I am not sure about how to integrate that into PHP and MySQL, my jQuery skills are limited! I'd also need to stop them spending more than a certain amount of money, each driver has a value and the teams can only spend a certain amount of money. There's also limits for example you can only pick a driver once, but you can have three different drivers. Finally, how would you decide that the user had picked their team, I don't want a submit button as that kind of defeats the object of the exercise! Thanks for any advice, I don't expect anyone to write the code for me but some pointers would be greatly appreciated.

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• Can i have a facebook fangate between pages of my website

  - by Onaiza

  I am not sure whether this is possible can i have a fan gate between two pages of a website, so that before a visitor can access a particular url it would be mandatory to like our fan page on facebook? Scenario I have a travel website puneritraveller.com, and for each destination featured in the website i have listed hotels, with a direct link to the website of the hotel. for example i have featured a destination 'Alibaug' with a hotels page - puneritraveller.com/alibaug-hotels.html , in this page i have given banner ads for a few hotels for example Yellow house which on clicking redirects to www.yellowhousealibag.com What i want to achieve is, when someone clicks on the banner ad for Yellow house they should be redirected to a page with a like button to facebook.com/puneritraveller and once he/she clicks on the like button should be redirected to www.yellowhousealibag.com Is this possible? Please help

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• Exclude pages from search results based on device class (mobile/desktop)

  - by user32224

  We're currently building a new responsive website. While working on the site map, we figured that we don't want to show certain sections on mobile devices. This can be easily done by hiding the navigation parts using CSS/media queries. However, the trouble is that the hidden sites would still show up in search engine results. If a user happens to click on one of these links she might happen to see a badly formatted page as we'd use desktop/tablet only code to show images and video. Is there any way influence the search engines to exclude certain pages if the search is done on a mobile device? Do search engines crawl pages once or with a device specific view twice? Could we set a noindex meta tag for a specific device class?

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• CSS&ndash;margin or padding

  - by woodbase

  I was beginning the implementation of a new design, and once again I found that my margin property on a div-tag, did not behave as I expected. So I decided to look for best practice when it comes to using margin or padding. What I found was this very short and concise description of the difference between the two: “Margin is on the outside of block elements while padding is on the inside. Use margin to separate the block from things outside it, padding to move the contents away from the edges of the block.” So what is best practice? Well it depends on the context. In my case I should have used padding…

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• User input and automated input separation

  - by tpaksu

  I have a MySQL database and an automation script which modifies the data inside once a day. And these columns may have changed by an user manually. What is the best approach to make the system only update the automated data, not the manually edited ones? I mean yes, flagging the cell which is manually edited is one way to do it, but I want to know if there's another way to accomplish this? Just curiosity. BTW, the question is about cell values, not rows.

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• I cannot login to my ubuntu admin!!!! HELP!

  - by Spinz01

  I used lightdm to hide the users at the login prompt of ubuntu and it hid my account. The only one visible is "other" and it doesn't even have a known password. So, I have accessed the terminal and created a guest account and another account without passwords and they are not visible. I am new to using the terminal so I don't know how to write the commands for either: making all users/accounts visible to the login and/or making the guest accounts visible, and then once in the GUI change the login settings to see my admin account. I have no idea of what else I could do, or even how to do it. I would appreciate any help, I'm in a desperate situation because I really need to access my desktop! THANK YOU!!! Any ideas are appreciated!!!

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• What class structure allows for a base class and mix/match of subclasses? (Similar to Users w/ roles)

  - by cdeszaq

  I have a set of base characteristics, and then a number of sub-types. Each instance must be one of the sub-types, but can be multiple sub-types at once. The sub-types of each thing can change. In general, I don't care what subtype I have, but sometimes I do care. This is much like a Users-Roles sort of relationship where a User having a particular Role gives the user additional characteristics. Sort of like duck-typing (ie. If my Foo has a Bar, I can treat it like a ThingWithABar.) Straight inheritance doesn't work, since that doesn't allow mix/match of sub-types. (ie. no multi-inheritance). Straight composition doesn't work because I can't switch that up at runtime. How can I model this?

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• Websockets VS SSE

  - by user3385828

  Sorry for asking this here, I bet it has been asked plenty of times before but this time it's something specific which I haven't understood anywhere else: Suppose I have a service which requires to seek the database for different data once and in a while. For this I have 2 or 3 SSE, each one with a different retry basetime (20000 miliseconds, 1000 miliseconds...). What I'd like to know is if websockets can handle different "data type" accordingly to the request, for example, could I create one websocket to handle a notification system, a chat system, a group system instead of separated SSEs and treat data differently with javascript? And if so, would it be of higher interest (performance) than actually performing different queries to the server through different SSEs?

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• Weird sound problems after upgrading to 13.10 (macbook)

  - by Atsch

  I have been having a very weird problem with my sound lately: 1)My right channel is extremely disorted with relativly loud noises, tested with several headphones. 2) After a while, wiered noises start coming from my speakers 3) playing lots of sounds at once causes the the output to become really mushed, e.g. in lmms or games. all points to a: a fault in my sound card, or b: a fault in alsa or pulseaudio, but I don't know how to find out. I will now try using the alsa-daily, and edit this away depending on my results after a restart

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• gnome-panel has multiple rows -- how to undo that?

  - by towi

  On Ubuntu 12.04 I use openbox with a single "gnome-panel" started. But after trying to configure my two screen in Xinerama mode I got additional rows of panels each time X restarted. And despite I completely reverted to my one-screen-X-config the gnome-panel displayed has 4 rows (4 at top sreen, 4 at bottom) only the outermost row has content, the other 3 are empty there is only one gnome-panel process running some widgets appear 4 times, too, although they run only once when I switch away from openbox using unity I am back to 1 row temporarily What went wrong here? How do I undo that? Things that did not help: rm -Rf .gnome2 .gconf/ .compiz-1/ pkill panel, and restarting it

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• VS2010 is a game changer with WPF & Silverlight/WP7 Silverlight.

  With the release of Visual Studio 2010 Microsoft makes crystal clear that they are pushing Silverlight to be the platform for developers to use to write it once, run everywhere. What started as a browser plug in, has become the Microsoft standard to provide developers the tools to write and distribute their applications. If you didnt attend the #MIX10 like me, you still can watch all the videos, hoping Microsoft fixed the bandwidth problem, to find for yourself about the common message from Microsoft...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• SSMS Slow To Save

  - by Bunch

  When using SSMS 2008 I found it to be really slow when trying to save a file, even a small one with just some simple SELECT statements on it. The symptoms were the flashing save disk icons in the lower right corner and selecting the location to save in the Save File dialog would hang each time I picked a location (e.g. Libraries, a folder). This was the first I had seen anything like this where it was really, really slow. It ended up that a server had died last week and I was still mapping a drive to it. SSMS was still trying to connect to it causing the slow down (further information here and here). Once I removed that the save functionality worked like it should. Tags: SQL

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• Incorrect Google Profile Results

  - by Mikhel

  Where do Google gets the info they display along with your profile in their "Profile Results" that is shown once you hit search for a particular person? When Google shows incorrect info, there's a feedback option at the bottom and it gives you an option to report a problem on which info is wrong. However, this is a tedious task since I've already done this before and they have corrected it but then when I search again after a couple of months, wrong info is shown again. So maybe I need to correct or do something on the process of putting those info into the profile... Not sure where Google gets all these info.. Help?

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• anyone can help me with accessing folders on windows from ubuntu?

  - by IslamShalaby

  hello all i had ubuntu on my desktop but i had lots of problems with it so i turned back to windows... now im having the biggest problem ever :S all my dad was in a folder that i created on ubuntu OS and i copied em to another HDD and then i removed it and putted my HDD and removed all the partitions and made the windows parttions once i copied those folders back to my HDD ( using windows 7 ) i found those folders size 0KB when i try to open them i get error.. pleaaase tell me what to do.. i was using my /home partition as ext4.. waiting for answer :(

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• Where can I get the 10k common English dictionary words which Stack overflow uses in related question? [migrated]

  - by itpian.com

  Where can I get the 10k common English dictionary words which Stack overflow uses in related question? Here in SE podcast - http://blog.stackoverflow.com/2008/12/podcast-32/ One of our major performance optimizations for the “related questions” query is removing the top 10,000 most common English dictionary words (as determined by Google search) before submitting the query to the SQL Server 2008 full text engine. It’s shocking how little is left of most posts once you remove the top 10k English dictionary words. This helps limit and narrow the returned results, which makes the query dramatically faster.

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