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• Windows partition UNKNOWN after Ubuntu installation attempt at dual boot - How to fix?

  - by user285645

  The idea was to install Win 7 and Ubuntu with dual boot. However, after installation, Gparted shows a /dev/sda1 as an 'unknown' filesystem and its size is 278 GB. All my windows files, data are in this partition. THen, there's /dev/sda2 with 'EXT4' filesystem (size-9.54 GB) - created during Ubuntu install. Then, there's /dev/sda3 with 'extended' filesystem (size- 10.5 GB) - created during Ubuntu install. Then, there's /dev/sda5 with 'linux swap' filesystem (size- 2 GB) - created during Ubuntu install. Then, there's /dev/sda6 with 'ext4' filesystem (size- 8.5 GB) - created during Ubuntu install. MY questions are: What exactly does this Gparted output above mean? How to recover my previous Windows 7 installation that's in /dev/sda1 (NTFS). I have some important files I need. Also, I had a PGP encryption on the disk before installing Ubuntu. Now, it just boots straight into Ubuntu... why? How to uninstall Ubuntu (the Try ubuntu and uninstall did not work. the boot-repair did not work) I have read other topics but noone has provided a proper step by step answer to how to recover my 278GB WIndows partition. The testdisk step by step procedure did not work. It says the NTFS disk is unrecognized.

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• What should a programmer's yearly routine be to maximize their technical skills?

  - by sguptaet

  2 years ago I made a big career change into programming. I learned various technologies on my own without any prior experience. I really love it and feel lucky with all the resources around us to help us learn. Books, courses, open-source, etc. There are so many avenues. I'm wondering what a good routine would be to follow to maximize my software development skills. I don't believe just building software is the way, because that leaves no time for learning new concepts or technologies. I'm looking for an answer like this: Take a new concept sabbatical/workshop 2 weeks per year. Read 1 theoretical and 1 practical programming book per year. Learn 1 additional language every 2 years. Take a 1 week vacation every 6 months. Etc. I realize that the above might sound naive and unrealistic as there are so many factors. But I'd like to know the "recipe" that you think is best that will serve as a guide for people.

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• How to Program AWS Spot Instances to Strategically Bid So the Auction is Never Lost Until a Competitor Beats the Maximum I'm Willing to Pay?

  - by Taal

  I believe I'm in the right section of stack exchange to ask this. If not, let me know. I only use Amazon Web Services for temporary type hosting services, so the spot instances are quite valuable to me. I would also just make an instance and start and stop it - but - that doesn't necessarily fit my bootstrapped budget sadly. Anyways, it really kills me when someone outbids me on a spot instance I have (I tend to go for the larger ones which there are fewer of available) and I get randomly kicked off. I know or at least I believe there is a way to program in something somehow to dynamically change your bidding price to beat a potential competitor's if their's is higher than yours. Now, I previously believed Amazon would just charge me for the highest price right above the next lowest competitor automatically (eliminating the need for this) - so if I bid too high, then I only pay what I would of needed to in order to win and keep the auction. Essentially, I thought my bid price was my max bid price. Apparently, according to my bills and several experiments I've done - this is not the case. They charge me for whatever I bid even when I know there is no one else around to counter bid me. I needed to clarify that, but let me get back to the main point: Let's say I'm bidding $0.50, competitor comes in and bids 0.55 cents. I get kicked off. I want to have it to where I'd set a maximum I'm willing to pay (let's say $1.00 here), and then when competitor comes in and tries to bid $.55, my bid is dynamically adjusted to beat his at $0.56 up until he breaks my $1.00 threshold. I've been reading the guides and although they are more or less straightforward, I feel like they leave a few holes in them that end up confusing me. Like, for instance, where do I input said command or when do I do it? Maybe I'm just tech illiterate and need help deciphering these guides. A good start for someone willing to answer/help me decipher this problem would be here: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/spot-as-update-bid.html

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• How do you compare programming job offers from companies in different countries?

  - by Danny Tuppeny

  This isn't really a programmer-specific question, but I'm not sure of a more appropriate place, and I think the users of this site are best able to answer the question in the context of programmers. Relocating to the US seems fairly common in the programming industry. I live in the UK, and maybe one day, I might do it too. So, if that day comes - how would you go about comparing job offers? Benefits are fairly easy to compare, but given the differences in cost of living, how would you go about comparing salaries and the quality of living you'll have? In a country where the cost of living is lower, you might be able to accept a lower salary (based on exchange rate) and still have the same quality of living. But what can you do to ensure this? In some cases, you may even take a "pay rise" in terms of exchange rate, but end up far worse off. How can you compare job offers across different countries to get an idea of the salary you would need in order to not feel you've gone "backwards"?

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• What do you do to balance the upper or lower case style to name file or folder between work and life? [on hold]

  - by sojyq

  I am a programmer from China. And I like to use English words to name my files and folders Whether it is for work or life. For example, suck as Movie, Work, QtProjects, Music and so on.And I keep the habit of initial the first letter for file name or folder name in Windows. But now I work on Ubuntu, and I found that all file name and folder name are lowercase in addition to the default folder such as Music, Movie and so on. And then I realize that in Linux world, most peoloe like to use all lowercase to name their files and folders for two reasons (1. Linux is Case sensitive. 2. It is fast for shell command.). And after work, when I switch from Linux to Windows, I confuse to use all lowercase or the first letter uppercase style to name my files in Windows. I'm caught in a dilemma. I think that all lowercase is more efficiency but the first letter uppercase is more readable. I thought for a long time and want to come up with a good answer to blance the two style name conversion. But I failed. I want to ask you that how you balance the uppercase or lowercase habbit in Windows, Mac, Linux between work and personal life style? Thank you very much! (My current solution is that when I am in Linux, I use all lowercase for files and folders, but when I am in Windows and Mac OS X, I couldn't find a good reason to convince me to use all lowercase ( I think in Windows and Mac OS X, the first letter uppercase style for me is more readable and beautiful).

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• Java and .NET cost of use [on hold]

  - by 1110

  I work with .NET technology stack for about 4 years. I am learning and enjoy working with ASP MVC framework and I never did anything serious in other languages. This is not the question like what is better (I read all similar questions). What interest me is the cost of switching. For example: If you are about to start a start-up company today and you are in my situation not too much money, some good idea that you think others will use and have a knowledge of .NET. In my head I have a few questions that I can't answer and I know that somebody with experience can: 1) Java & .NET hosting. Suppose shared hosting is not good enough anymore, your site has grown and you need more resources. How much Java services is cheaper compared to .NET? 2) I didn't follow hype about ORACLE will kill java long time. Does oracle show interest in investing in java. I mean is is safe to bet on java as a technology when starting start-up (basically did oracle show some will to destroy java platform)? 3) I am not sure what I am asking here. When you use Java you can use JEEE stack or Java with third party stack (spring, hibernate, maven etc.). I saw a lot of project that work with second option if web application is not enterprise level but social networking site for example which stack is best pick? Summary of this question is is it safe to jump in to Java learn it and build product based on it. It's not too hard for me to learn it. But how much can I get from it.

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• Shader compile log depending on hardware

  - by dreta

  I'm done with the core of my graphics engine and I'm testing it on every platform I can get my hands on. Now, what I noticed is that different drivers return different shader and program compile log content. For example, on my friend's laptop if you successfuly compile a shader then the log is simply empty. However on my PC I get some useful information along with it. So if I compile a vertex shader, I'll get: Vertex shader was successfully compiled to run on hardware. Which isn't that impressive, but is what happens when I compile a program. On my friend's computer the log is empty, since the program compiles. However on my own computer I get: Vertex shader(s) linked, fragment shader(s) linked. Which is awesome, because I'm attaching a geometry shader with 0 (I have a geometry shader file with trash, so it doesn't compile and the pointer is set to 0), and the compiler just tells me which shaders linked. Now it got me thinking, if I was going to buy a graphics card, is there a way for me to get the information about whether or not I'll get this "extended" compile information? Maybe it's vendor specific? Now I don't expect an answer TBH, this seems a bit obscure, but maybe somebody has any experience with this and could post it.

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• How do I cluster strings based on a relation between two strings?

  - by Tom Wijsman

  If you don't know WEKA, you can try a theoretical answer. I don't need literal code/examples... I have a huge data set of strings in which I want to cluster the strings to find the most related ones, these could as well be seen as duplicate. I already have a set of couples of string for which I know that they are duplicate to each other, so, now I want to do some data mining on those two sets. The result I'm looking for is a system that would return me the possible most relevant couples of strings for which we don't know yet that they are duplicates, I believe that I need clustering for this, which type? Note that I want to base myself on word occurrence comparison, not on interpretation or meaning. Here is an example of two string of which we know they are duplicate (in our vision on them): The weather is really cold and it is raining. It is raining and the weather is really cold. Now, the following strings also exist (most to least relevant, ignoring stop words): Is the weather really that cold today? Rainy days are awful. I see the sunshine outside. The software would return the following two strings as most relevant, which aren't known to be duplicate: The weather is really cold and it is raining. Is the weather really that cold today? Then, I would mark that as duplicate or not duplicate and it would present me with another couple. How do I go to implement this in the most efficient way that I can apply to a large data set?

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• Getting Center and Radius of Irregural Object

  - by Moaz ELdeen

  I have drawn an asteroid object manually , and would like to get its center/radius by a specific equation. I think I can get them by calculated and hard-coded values. The code to draw the asteroid: void Asteroid::Draw() { float ratio = app::getWindowWidth()/app::getWindowHeight(); gl::pushMatrices(); gl::translate(m_Pos*ratio); gl::scale(3.5*ratio,3.5*ratio,3.5*ratio); gl::color(ci::Color(1,1,1)); gl::drawLine(Vec2f(-15,0),Vec2f(-10,-5)); gl::drawLine(Vec2f(-10,-5),Vec2f(-5,-5)); gl::drawLine(Vec2f(-5,-5),Vec2f(-5,-8)); gl::drawLine(Vec2f(-5,-8),Vec2f(5,-8)); gl::drawLine(Vec2f(5,-8),Vec2f(5,-5)); gl::drawLine(Vec2f(5,-5),Vec2f(10,-5)); gl::drawLine(Vec2f(10,-5),Vec2f(15,0)); gl::drawLine(Vec2f(15,0),Vec2f(10,5)); gl::drawLine(Vec2f(10,5),Vec2f(-10,5)); gl::drawLine(Vec2f(-10,5),Vec2f(-10,5)); gl::drawLine(Vec2f(-15,0),Vec2f(-10,5)); gl::popMatrices(); } According to the answer I have written that code to calculate the radius, is it correct or not ? cinder::Vec2f Asteroid::getCenter() { return ci::Vec2f(m_Pos.x, m_Pos.y); } double Asteroid::getRadius() { ci::Vec2f _vec = (getCenter()- Vec2f(15,5)); return _vec.length()*0.3f; }

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• What should I do if I have a genius team lead which does not share? [on hold]

  - by ???

  Good evening, I got some uncertainties and need some advise or any experiences 'story' from you guys. The question is quite straight forward but I gonna clarify somethings in details. My Background I just graduated from my university 6 months ago. Being offer from 4 companies after I go through some interviews. Now I'm working on a banking services company, everything is consider 'ok' except I had a genius team lead which does not share enough information to let me do a task/work. Situation faced In my team, there is a "ask to know" culture. When you are going to guess or try some methods to solve the problems, I need to ask to make sure I do not do something stupid and when I asked my team lead...There're only 2 situations, 1st: I being given a strange look like: "do you know what are you do/said just now? Just follow the standards, I do not care!" (Felt humiliated) 2nd: Get the answer but my team lead suddenly in bad moods, I think thats I have waste her time for some simple questions which I do not know. Add-Ons My team lead is really a clever and a smart senior developers/programmers, sometimes she will brief through the tasks while sometimes not. Depend on her moods. There certain times I am look-down on myself and felt want to quit/resign. I'm still under-probation and had joined this company for around 4 months. I felt like I do not have the innovation skills which I used to had in university and lose my self-confidence when communicate to others.

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• Restrict movement within a radius

  - by Phil

  I asked a similar question recently but now I think I know more about what I really want to know. I can answer my own question if I get to understand this bit. I have a situation where a sprite's center point needs to be constrained within a certain boundary in 2d space. The boundary is circular so the sprite is constrained within a radius. This radius is defined as a distance from the center of a certain point. I know the position of the center point and I can track the center position of the sprite. This is the code to detect the distance: float distance = Vector2.Distance(centerPosition, spritePosition)); if (distance > allowedDistance) { } The positions can be wherever on the grid, they are not described as in between -1 or 1. So basically the detecting code works, it only prints when the sprite is outside of it's boundary I just don't know what to do when it oversteps. Please explain any math used as I really want to understand what you're thinking to be able to elaborate on it myself.

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• No MAU required on a T4

  - by jsavit

  Cryptic background One of the powerful features of the T-series servers is its hardware crypto acceleration, which dramatically speeds up the compute intensive algorithms needed to encrypt and decrypt data. Previously, administrators setting up logical domains on older T-series servers had to explicitly assign crypto resources (called "MAU" for historical reasons from the T1 chip that had "modular arithmetic units") to domains that had a significant crypto workload (say, an SSL based web server). This could be an administrative burden, as you had to choose which domains got the crypto units, and issue the appropriate ldm set-mau N mydomain commands. The T4 changes things The T4 is fast. Really fast. Its clock rate and out-of-order (OOO) execution that provides the single-thread performance that T-series machines previously did not have. If you have any preconceptions about T-series performance, or SPARC in general, based on the older servers (which, it must be said, were absolutely outstanding for multi-threaded applications), those assumptions are now obsolete. The T4 provides outstanding. performance for all kinds of workload, as illustrated at https://blogs.oracle.com/bestperf. While we all focused on this (did I mention the T4 is fast?), another feature of the T4 went largely unnoticed: The T4 servers have crypto acceleration "just built in" so administrators no longer have to assign crypto accelerator units to domains - it "just happens". This is way way better since you have crypto everywhere by default without having to manage it like a discrete and limited resource. It's a feature of the processor, like doing an integer add. With T4, there is no management necessary, you just have HW crypto everywhere all the time seamlessly. This change hasn't been widely advertised, and some administrators have wondered why there were unable to assign a MAU to a domain as they did with T2 and T3 machines. The answer is that there is no longer any separate MAU, so you don't have to take any action at all - just leave the default of 0. Summary Besides being much faster than its predecessors, the T4 also integrates hardware crypto acceleration so its seamlessly available to applications, whether domains are being used or not. Administrators no longer have to control how they are allocated - it "just happens"

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• Why have we got so many Linux distributions? [closed]

  - by nebukadnezzar

  Pointed to from an answer to another question, I came across this graphic, and I'm shocked how many linux distributions currently exist. However, it seems that most of these distributions are forks of already popular distributions with minimal changes, usually limited to themes, wallpapers and buttons. It would still seem easier to create a sub-distribution with the required changes, such as XUbuntu with XFCE4, KUbuntu with KDE4, Fluxbuntu with Fluxbox, etc. In my mind there are a number of problems with having so many distributions - perhaps less security/stability due to smaller group of developers, and also the confusingly vast range of choice for newcomers to Linux. Some reasons that developers might decide to fork are: Specializing on a particular topic (work-related topic - i.e. for a Hospital, etc) An exceptional architecture, that requires a special set of software Use of non-FOSS, proprietary technology, and such So what other reasons are there that have caused so many people decided to create their own distributions? What are the thought processes that have led to this? And are these "valid" reasons - do we need so many distributions? If you can back your experiences up with references that would be great.

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• Hardware issues on Samsung NF208 (NF210)

  - by KristoferA - Huagati.com

  I'm trying to get Ubuntu 10.10 running on my wife's Samsung NF208 (same spec as NF210, but shipped without OS), and I have run into a pile of problems: At first, there were problems with audio, display brightness, and WiFi, so I reinstalled Ubuntu from scratch. After reinstalling, the audio has started working but the WiFi loses network access all the time and then it takes 5-10 minutes for it to reconnect to the network. Also, display brightness is at its lowest. I have tried to use the brightness command but it won't run. Is this system utterly incompatible with Ubuntu, or are there working WiFi and display drivers for it somewhere? I have googled for days but haven't found anything useful. Help me. Update: I never got it working properly. I came across lots of useful tips and tricks over at the forum linked to in the accepted answer but I just wasn't able to get it working and stable enough for the intended use. Hopefully a future version of Ubuntu and/or the samsung tools will solve that. Related thread over at the other forum: http://www.voria.org/forum/viewtopic.php?f=3&t=682

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• 2d game view camera zoom, rotation & offset using 'Filter' / 'Shader' processing?

  - by Arthur Wulf White

  I wish to add the ability to zoom-in, zoom-out, rotate and move the view in a top-down view over a collection of points and lines in a large 2d map. I split the map into a grid so I only need to render the points that are 'near' the camera. My question is, how do I render a point A(Xp,Yp) assuming the following details: Offset of the camera pov from the origin of the map is: Xc, Yc Meaning the camera center is positioned on top of that point. If there's a point in Xc, Yc it is positioned in the center of the screen. The rotation angle is: alpha The scale is: S Read my answer first. I am thinking there is more optimized solution, thanks. My question is how to include the following improvement: I read in the AS3 Bible book that: In regards to ShaderInput, You can use these methods to coerce Pixel Bender to crunch huge sets of data masquerading as images, without doing too much work on the ActionScript side to make them look like images. Meaning if I am performing the same linear function on a lot of items, I can do it all at once if I use Shaders correctly and save processing time. Does anyone know how that is accomplished? Here is a sample of what I mean: http://wonderfl.net/c/eFp0/

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• Librated error when creating partition table

  - by Marko

  I bought a Dell Inspiron 5521 laptop a few days ago that came with Ubuntu preinstalled. I haven't used Ubuntu yet, and I don't have any experience in using it. I wanted to install Windows 7 64-bit on my laptop alongside Ubuntu, and made two bootable USB drives with Gparted and Windows 7. There wasn't a suitable partition on my laptop in which I could install Windows 7. I've read the instructions for using Gparted to create or manage my hard drive. I inserted the USB, booted from BIOS, and followed the procedure in installing Gparted. Then I entered Gparted, and the following error occurred: Librated error when Creating partition table. It asked me to click on either OK or Cancel. Either way I had my hard disk shown to me in the user window, in partitions that were made by the manufacturer: Partition File sys Label Size Flags /dev/sda1 fat32 dellutility 300.00 Mib diag /dev/sda2 fat32 os 3.00 Gib lba /dev/sda3 ext4 912.46 Gib boot /dev/sda4 extended 15.75 Gib (had a subpart) /dev/sda5 linux-swap 15.75 Gib ...and a option to switch to dev/sdb that's unused and of capacity 3Gib. I've used the biggest partition 912.46 Gib, and tried to reduce its size, and clicked OK. Then when I tried to make a new partition, it said it can't make any more partitions, no more than a maximum of 5. I would like to keep Ubuntu and slowly learn, but I also need to use programs that work in Windows. Thank you for taking the time to answer my question.

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• What technologies are needed to be a freelance web developer / designer targeting small businesses?

  - by Jason Wirth

  First off, I'm not looking for this answer: "learn PHP/MySQL, JQuery, HTML/CSS...." My background, I wear many hats, and do many things. Currently I manage investment accounts with a business partner who is also a friend. He happens to be attending business / law school perusing a joint JD and MBA. As a result, we're putting our into "coast", maintaining our current clients, but not acquiring more. Recently I've picked up some freelance graphic design / web development / online marketing side work (Photoshop, HTML/CSS, WordPress) through some personal networks. The work is enjoyable; now I'm thinking about expanding it into a larger business with these primary goals: augment my finances (I'm shooting for about $1,000-2,000 per mo.), learn new technologies, involve myself with meaningful work. As an entrepreneur I don't mind the aspects of running a business that hassle other freelancers... -- the marketing -- the billing -- etc. I'm considering targeting the small to middle market businesses and organizations where I can contribute in marketing, design, and development building projects from the ground up. Thus I'll have freedom to decide the specific technology (I won't have to work with an existing code base). What kinds of projects should I focus on? What technologies are a good fit for this style of work? For example: It might be fun to develop with Ruby on Rails. However, maybe a lot of projects would be rolling out e-commerce solutions. Thus, I should focus on PHP due to more shopping cart options, skipping ROR entirely.

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• Can't boot from USB - 11.04 / Exopc

  - by Charles

  I can't find the answer to this anywhere. I am new to Ubuntu, please help! I have a wetab, except now I don't, because I put Ubuntu 10.10 over the top of it (meant to dual boot, but that's another story). I upgraded to 11.04 out of curiosity. It's good, but not for touchscreen tablets - no multi touch for example. I want to get back the wetab OS now. I have all the files, and I have a bootable gparted USB stick. The problem is I can't seem to boot from USB. The "wetab" PC is actually an ExoPC, so it has only the hardware button and a soft button in the top corner. Using the wetab OS method of reaching BIOS with the hard and soft buttons doesn't work now, I only get a menu asking if I want to run Ubuntu in recovery mode, run a limited command line, or do a memory check. I need to either repartition the drive so I can dual boot with WeTabOS, or just wipe over Ubuntu and start again. How do I do this? I have also tried hammering F11, Del, F8, F1, many other combinations! Edit: I do have access to USB keyboard and mouse

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• Are small amounts of functional programming understandable by non-FP people?

  - by kd35a

  Case: I'm working at a company, writing an application in Python that is handling a lot of data in arrays. I'm the only developer of this program at the moment, but it will probably be used/modified/extended in the future (1-3 years) by some other programmer, at this moment unknown to me. I will probably not be there directly to help then, but maybe give some support via email if I have time for it. So, as a developer who has learned functional programming (Haskell), I tend to solve, for example, filtering like this: filtered = filter(lambda item: included(item.time, dur), measures) The rest of the code is OO, it's just some small cases where I want to solve it like this, because it is much simpler and more beautiful according to me. Question: Is it OK today to write code like this? How does a developer that hasn't written/learned FP react to code like this? Is it readable? Modifiable? Should I write documentation like explaining to a child what the line does? # Filter out the items from measures for which included(item.time, dur) != True I have asked my boss, and he just says "FP is black magic, but if it works and is the most efficient solution, then it's OK to use it." What is your opinion on this? As a non-FP programmer, how do you react to the code? Is the code "googable" so you can understand what it does? I would love feedback on this :) Edit: I marked phant0m's post as answer, because he gives good advice on how to write the code in a more readable way, and still keep the advantages. But I would also like to recommend superM's post because of his viewpoint as a non-FP programmer.

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• At what point does programming become a useful skill?

  - by Elip

  This is probably a very difficult question to answer, because of its subjectivity, but even a vague guess would help me out: Now that Khan Academy is beginning to offer Computer Science lectures I'm getting an itch to learn programming again. I maybe am a bit more technical than your average computer user, using Ubuntu as my OS, LaTeX for writing and I know some small tricks like regular expressions or boolean search for google. However from my previous attempts to learn programming, I realized I do not have a natural aptitude for it and I also don't seem to enjoy the process. But I am fairly certain that a basic proficiency in programming could prove to be very beneficial for me career wise; I also often get ideas for little scripts that I cannot implement. My question is: Let's say you study programming 1 hour / day on average. At what point will you become good enough so that programming can be used for automating tasks and actually saving time? Do you think programming is worth picking up if you never have the ambition to make it your career or even your hobby, but use it strictly for utility purposes?

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• How to get local business nationwide exposure? [closed]

  - by guisasso

  here's the situation: This company offers local home services (construction...), but also fabricates many custom items that can be shipped nationally, and even internationally. Since i started working on this website, it has ranked pretty well on alexa global and locally, and i have made many SEO improvements that doubled the visits to the website in 6 months. The website is listed in many different directories (dmoz & etc...), maps (google maps & etc...), business listing sites (yelp & etc..), trade specific websites (angie's list, houzz & etc...), state specific business listings and etc, there are many links to pictures displayed on the website, links to the website itself, i have a google analytics and webmaster tools account, with sitemaps, newsletters, facebook page.... the list goes on and on. All of which have been working pretty well locally. We have had some success with doing business in other states and even other countries, but it is still a pretty small percentage of the market. I also advertise on google adwords locally, and since this would be the obvious answer, my question is: Without paid advertisement, how can i improve the visibility of this local business website nationally to attract customers in all US States?

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• More Tables or More Databases?

  - by BuckWoody

  I got an e-mail from someone that has an interesting situation. He has 15,000 customers, and he asks if he should have a database for their data per customer. Without a LOT more data it’s impossible to say, of course, but there are some general concepts to keep in mind. Whenever you’re segmenting data, it’s all about boundary choices. You have not only boundaries around how big the data will get, but things like how many objects (tables, stored procedures and so on) that will be involved, if there are any cross-sections of data (do they share location or product information) and – very important – what are the security requirements? From the answer to these types of questions, you now have the choice of making multiple tables in a single database, or using multiple databases. A database carries some overhead – it needs a certain amount of memory for locking and so on. But it has a very clean boundary – everything from objects to security can be kept apart. Having multiple users in the same database is possible as well, using things like a Schema. But keeping 15,000 schemas can be challenging as well. My recommendation in complex situations like this is similar to a post on decisions that I did earlier – I lay out the choices on a spreadsheet in rows, and then my requirements at the top in the columns. I  give each choice a number based on how well it meets each requirement. At the end, the highest number wins. And many times it’s a mix – perhaps this person could segment customers into larger regions or districts or products, in a database. Within that database might be multiple schemas for the customers. Of course, he needs to query across all customers, that becomes another requirement. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• How to avoid the GameManager god object?

  - by lorancou

  I just read an answer to a question about structuring game code. It made me wonder about the ubiquitous GameManager class, and how it often becomes an issue in a production environment. Let me describe this. First, there's prototyping. Nobody cares about writing great code, we just try to get something running to see if the gameplay adds up. Then there's a greenlight, and in an effort to clean things up, somebody writes a GameManager. Probably to hold a bunch of GameStates, maybe to store a few GameObjects, nothing big, really. A cute, little, manager. In the peaceful realm of pre-production, the game is shaping up nicely. Coders have proper nights of sleep and plenty of ideas to architecture the thing with Great Design Patterns. Then production starts and soon, of course, there is crunch time. Balanced diet is long gone, the bug tracker is cracking with issues, people are stressed and the game has to be released yesterday. At that point, usually, the GameManager is a real big mess (to stay polite). The reason for that is simple. After all, when writing a game, well... all the source code is actually here to manage the game. It's easy to just add this little extra feature or bugfix in the GameManager, where everything else is already stored anyway. When time becomes an issue, no way to write a separate class, or to split this giant manager into sub-managers. Of course this is a classical anti-pattern: the god object. It's a bad thing, a pain to merge, a pain to maintain, a pain to understand, a pain to transform. What would you suggest to prevent this from happening?

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• Will all applications work fine on 64-bit Ubuntu?

  - by Qmal

  I used Ubuntu some time ago and now I want to switch on it again since community raised a lot and so did support for applications like Wine. I remember that when 64bit version just came out many applications didn't work as they did on 32bit version. Is it not better or still the same? Maybe they implemented something like WoW in Windows that simulates 32bit architecture and every possible app is working just fine. I am asking because I have lots of ram and I don't want to sit on 3GB when I have 8. Also, I am somewhat of a programmer, but that is not a problem because if I write PHP I use NetBeans on Windows anyway, and it works on Linux just as fine. But I also love to write C++/C# code. Is it well supported? I really like Visual Studio 2010, it is very slick and has good auto completion, debugging and so on... Is there any IDE on Ubuntu that is similar to Visual Studio in terms of auto-completion, code formatting, GUI designer, debugging? I really hope you will answer me these questions because I really like to "convert" myself to Ubuntu once and for all.

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• Lubuntu fails plug and play such as scanners; default file location on Gnumeric

  - by Arkay

  I am new to Lubuntu and I have been giving it a good try but confess I am now tempted to go back to Windows. However, I am open to persuasion if I can get a simple answer to two questions. The first is a hardware question issue. It seems from the forum that many users like me cannot use plug and play hardware such as scanners. Are we doing anything wrong or does Lubuntu (mine is 13.04) not support plug and play or scanners? I have read lots of previous answers about scanners but they all seem to involve re-writing lines of instructions to various areas of the system - not something an amateur like me can do with ease. Mine is a Packard Belle Diamond 1200 plus and apparently it should work fine on Lubuntu - but can I even get it recognised, let alone working - No? Secondly is there an easy way in Gnumeric to set the default file location so that I don't have to trawl through my whole tree to locate a file I want to open? Thanks to anybody who can get me stay with Lubuntu with their wisdom.

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