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  • .NET vs Windows 8: Rematch!

    - by Simon Cooper
    So, although you will be able to use your existing .NET skills to develop Metro apps, it turns out Microsoft are limiting Visual Studio 2011 Express to Metro-only. From the Express website: Visual Studio 11 Express for Windows 8 provides tools for Metro style app development. To create desktop apps, you need to use Visual Studio 11 Professional, or higher. Oh dear. To develop any sort of non-Metro application, you will need to pay for at least VS Professional. I suspect Microsoft (or at least, certain groups within Microsoft) have a very explicit strategy in mind. By making VS Express Metro-only, developers who don't want to pay for Professional will be forced to make their simple one-shot or open-source application in Metro. This increases the number of applications available for Windows 8 and Windows mobile devices, which in turn make those platforms more attractive for consumers. When you use the free VS 11 Express, instead of paying Microsoft, you provide them a service by making applications for Metro, which in turn makes Microsoft's mobile offering more attractive to consumers, increasing their market share. Of course, it remains to be seen if developers forced to jump onto the Metro bandwagon will simply jump ship to Android or iOS instead. At least, that's what I think is going on. With Microsoft, who really knows?

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  • Getting Started with Cloud Computing

    - by juanlarios
    You’ve likely heard about how Office 365 and Windows Intune are great applications to get you started with Cloud Computing. Many of you emailed me asking for more info on what Cloud Computing is, including the distinction between "Public Cloud" and "Private Cloud". I want to address these questions and help you get started. Let's begin with a brief set of definitions and some places to find more info; however, an excellent place where you can always learn more about Cloud Computing is the Microsoft Virtual Academy. Public Cloud computing means that the infrastructure to run and manage the applications users are taking advantage of is run by someone else and not you. In other words, you do not buy the hardware or software to run your email or other services being used in your organization – that is done by someone else. Users simply connect to these services from their computers and you pay a monthly subscription fee for each user that is taking advantage of the service. Examples of Public Cloud services include Office 365, Windows Intune, Microsoft Dynamics CRM Online, Hotmail, and others. Private Cloud computing generally means that the hardware and software to run services used by your organization is run on your premises, with the ability for business groups to self-provision the services they need based on rules established by the IT department. Generally, Private Cloud implementations today are found in larger organizations but they are also viable for small and medium-sized businesses since they generally allow an automation of services and reduction in IT workloads when properly implemented. Having the right management tools, like System Center 2012, to implement and operate Private Cloud is important in order to be successful. So – how do you get started? The first step is to determine what makes the most sense to your organization. The nice thing is that you do not need to pick Public or Private Cloud – you can use elements of both where it makes sense for your business – the choice is yours. When you are ready to try and purchase Public Cloud technologies, the Microsoft Volume Licensing web site is a good place to find links to each of the online services. In particular, if you are interested in a trial for each service, you can visit the following pages: Office 365, CRM Online, Windows Intune, and Windows Azure. For Private Cloud technologies, start with some of the courses on Microsoft Virtual Academy and then download and install the Microsoft Private Cloud technologies including Windows Server 2008 R2 Hyper-V and System Center 2012 in your own environment and take it for a spin. Also, keep up to date with the Canadian IT Pro blog to learn about events Microsoft is delivering such as the IT Virtualization Boot Camps and more to get you started with these technologies hands on. Finally, I want to ask for your help to allow the team at Microsoft to continue to provide you what you need. Twice a year through something we call "The Global Relationship Study" – they reach out and contact you to see how they're doing and what Microsoft could do better. If you get an email from "Microsoft Feedback" with the subject line "Help Microsoft Focus on Customers and Partners" between March 5th and April 13th, please take a little time to tell them what you think. Cloud Computing Resources: Microsoft Server and Cloud Computing site – information on Microsoft's overall cloud strategy and products. Microsoft Virtual Academy – for free online training to help improve your IT skillset. Office 365 Trial/Info page – get more information or try it out for yourself. Office 365 Videos – see how businesses like yours have used Office 365 to transition to the cloud. Windows Intune Trial/Info – get more information or try it out for yourself. Microsoft Dynamics CRM Online page – information on trying and licensing Microsoft Dynamics CRM Online. Additional Resources You May Find Useful: Springboard Series Your destination for technical resources, free tools and expert guidance to ease the deployment and management of your Windows-based client infrastructure. TechNet Evaluation Center Try some of our latest Microsoft products for free, Like System Center 2012 Pre-Release Products, and evaluate them before you buy. AlignIT Manager Tech Talk Series A monthly streamed video series with a range of topics for both infrastructure and development managers. Ask questions and participate real-time or watch the on-demand recording. Tech·Days Online Discover what's next in technology and innovation with Tech·Days session recordings, hands-on labs and Tech·Days TV.

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  • How are objects modelled in a functional programming language?

    - by Giorgio
    In an answer to this question (written by Pete) there are some considerations about OOP versus FP. In particular, it is suggested that FP languages are not very suitable for modelling (persistent) objects that have an identity and a mutable state. I was wondering if this is true or, in other words, how one would model objects in a functional programming language. From my basic knowledge of Haskell I thought that one could use monads in some way, but I really do not know enough on this topic to come up with a clear answer. So, how are entities with an identity and a mutable persistent state normally modelled in a functional language? EDIT Here are some further details to clarify what I have in mind. Take a typical Java application in which I can (1) read a record from a database table into a Java object, (2) modify the object in different ways, (3) save the modified object to the database. How would this be implemented e.g. in Haskell? I would initially read the record into a record value (defined by a data definition), perform different transformations by applying functions to this initial value (each intermediate value is a new, modified copy of the original record) and then write the final record value to the database. Is this all there is to it? How can I ensure that at each moment in time only one copy of the record is valid / accessible? One does not want to have different immutable values representing different snapshots of the same object to be accessible at the same time.

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  • For a large website developed in PHP, is it necessary to have a framework?

    - by Martin
    I am wondering if it is necessary to have a framework or if it is a must-have if I plan to make a large website. Large website could mean a lot of things: in other words, multiple dynamic web pages (40-50 dynamic pages, mysql content) and a lot of visitors (+- a million hits per month). The site will be hosted in a dedicated server environment. I know that it could simplify coding for a developer team, that it includes libraries and a lot of advantages. But I just feel that I don't need that. I think that learning how it works, managing it and installing it would take more time and I could use that time to code. I write PHP the simplest way I could (with performance in mind) and I try to reuse my code/functions/classes most of the time and I make sure that if another developer joins the team, that he won't be lost in the code. I am also planning to use MemCached or another Cache for PHP. As I said, the site will be hosted in a dedicated server environment but will be entirely managed by the hosting company. I am pretty sure the control panel for me to control the basic stuff will be Cpanel. For a developer like me that only knows PHP, Javascript, HTML, CSS, MYSQL and really basic server management, I feel that it seems to complicated to have a framework. Am I wrong? Is it worth the time to learn all about it? Thank you for your opinions and suggestions.

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  • 12.10 install overwrote my windows partition

    - by Niall C
    Recently decided to switch back to Ubuntu. I have a 3TB drive which was running win7. I had 3 partitions. c: for windows d: data e: data Have installed ubuntu before so 'thought' I knew what I was doing. I using netbootin I installed from a usb stick. I didn't choose the default options but I didn't choose the 'manual install' either. I can't remember what option I took but I figured at some stage it would tell me how it was going to partition the disk and at that stage I would see if it had recognised the NTFS partitions and I would be able to abort if it didn't. Unfortunately, it didn't and just went ahead and installed Ubuntu and made up it's own mind on how it was going to partition the disk. Usual story, the two NTFS data partitions weren't backed up. Is there anything I can do to retrieve the ntfs data? I'm currently trying out testdisk and I know I can use photodisk to retrieve certain file types but all the filenames will be lost and it's going to take a hell of a lot of time to rename them all. Any help or assistance would be more than gratefully accepted. Thanks in advance, Niall

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  • Artists and music - i need help to decide wich cms to use.

    - by infty
    A friend has asked me to build a site with the following options: staff members must be able to add new music and artists to the page a gallery must be provided - it is also good if each artist has the ability to have his/her own, smaller, gallery users must be able to vote for artists users must be able to alter in discussions (forums or comments sections) staff members must be able to blog staff members must be able to write articles I did a small project where i actually implementet all of these features, but i want to use an existing content managment system for all of these features so that future devolpers can, hopefully, more easy extend the website. And also, so that i dont have to provide to much documentation. I have never developed a website using an external cms like drupal or wordpress and after seeing hours of tutorial videos of both systems, i still cant make up my mind on wheter i should : a) use Drupal 7 b) use Wordpress 3 c) create my own cms I can only imagine that staff members would also want to create content using iphone or android based mobile devices. But this is not a required feature. Can someone, with experience, please tell me about their experiences with bigger projects like this? The site will approx. have a total of 400 000 - 500 000 visitors (not daily visitors, based on numbers from last year in a period of 4 months)

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  • F# &ndash; Converting your C# brain to the F# way

    - by MarkPearl
    My brain still thinks in C#!!! I have been looking at F# and trying to figure out the basics of it, but all the time in the back of my mind I am going – what is the C# equivalent to this or that… It’s frustrating because I almost want a F# to C# dictionary the whole time – and simply translate my C# code to F# – which would negate the main motivation for learning F# – as I want learn functional programming - if I was simply doing C# code in a F# syntax I would be gaining nothing! So I am experiencing pain while my brain forms some new neural networks… but luckily I live in a country where we have 11 official spoken languages, and plenty more unofficial languages so I have gone through the pain of learning how to speak a new language before – and I am finding the process is almost identical in learning a programming language that promotes a different way of looking at problems (from Object Orientated to Functional). That beings said… the first thing to learn is the basic syntax… I have searched the web for appropriate places to get a translation – and have been quite disappointed with what is out there for F#. Luckily, OCaml came to the rescue. There are some really good tutorials on getting started with OCaml syntax, one in particular that stood out was the OCamal-Tutorial. What I particularly like about it is that it is doing comparisons between C based languages and OCaml. Give it a read sometime – it’s well worth it and has definitely helped me understand F# a little better.

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  • Move unity launcher to bottom of the screen

    - by argvar
    I have Ubuntu 13.04 DESKTOP version and for some odd reason I'm told that the Unity launcher cannot be moved to the bottom of the screen because of several reasons: 1. Canonical wants it there so it fits with their overall design goals, namely when it comes to touchscreen devices and netbooks. This in my mind totally ignores the fact that most Ubuntu users are DESKTOP users. No matter what Canonicals long term goal is, it surely mustn't be at the expense of needs of their core user base. 2. Most monitors are widescreen, the launcher is more compact where it is. This is not only taking away the users choice, but is also a wrong assessment. Widescreen monitors can sometimes be rotated on a pivot, giving it a portrait aspect. By displaying the Unity launcher on the left side it takes up a lot of space. Many desktop users have multiple monitors, and having the launcher on the left side of each monitor is very awkward. Also, many websites are catered to fit on a half 1920 display, so you can have two browser windows open side-by-side with all content visible. The placement of the Unity launcher takes away the horizontal space meaning there's less room for each browser window, and you'll see the right side of the web pages being occluded. Any suggestion to simply hide the Unity launcher, or "Canonical knows best" or "get used to it" are unwelcome and totally ignores the above points. Linux is about choice. Canonical's stubbornness with the Unity launcher placement is inconsistent with what Linux is about.

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  • Can I use a 302 redirect to serve up static content from an URL with escaped_fragment?

    - by Starfs
    We would like to serve up SEO-friendly Ajax-driven content. We are following this documentation. Has anyone ever tried to write a 302 redirect into the .htaccess file, that takes the ?_escaped_fragment= string and send that to a static page?, for example /snapshot/yourfilename/. How will Google react to this? I've gone through the documentation and it's not very clear. The below quote is from Google's documentation this is what I find. I'm not sure if they are saying that you can redirect the _escaped_fragment_ URL to a different static page, or if this is to redirect the hashtag URL to static content? Thoughts? From Google's site: Question: Can I use redirects to point the crawler at my static content? Redirects are okay to use, as long as they eventually get you to a page that's equivalent to what the user would see on the #! version of the page. This may be more convenient for some webmasters than serving up the content directly. If you choose this approach, please keep the following in mind: Compared to serving the content directly, using redirects will result in extra traffic because the crawler has to follow redirects to get the content. This will result in a somewhat higher number of fetches/second in crawl activity. Note that if you use a permanent (301) redirect, the url shown in our search results will typically be the target of the redirect, whereas if a temporary (302) redirect is used, we'll typically show the #! url in search results. Depending on how your site is set up, showing #! may produce a better user experience, because the user will be taken straight into the AJAX experience from the Google search results page. Clicking on a static page will take them to the static content, and they may experience avoidable extra page load time if the site later wants to switch them to the AJAX experience.

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  • Photos being copied all over the place

    - by plua
    We have a rather popular website with plenty of photos. Our whole business depends on our content - and the photos are important in this. We invest a lot of time, effort, and money into taking these pictures. On our website we have clear copyright notices, we have the website name and logo in the photos, and we have a Photo Licensing page which states the prices of licensing our photos. Despite all this, our photos are copied by personal and commercial websites alike. We really want to do something about this. We do not want them to take out the photos and leave it at that. We want them to pay for the usage, as we clearly state on our website. Now a few questions come to mind: Can we legally force them to pay right away? Or are we obligated to first write a "Cease and Desist" letter? Photos are used on websites throughout the world. Are there any worldwide rules for this? Has anybody experience with doing these things outside of their home country? Should we hire a lawyer in any country? Or could a local lawyer contact oversees companies directly?

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  • Run external application on markdown source in ikiwiki

    - by student
    Can I add a button to each wiki page in ikiwiki which launches an external application (on the client side) or script with the markdown code of the current page as input? Edit: I didn't realize that it might be complicated to do it on client side as Zenklys' answer suggested. So perhaps I should describe more concretely what I have in mind: I want to have two buttons: "Get LaTeX" and 2. "Get pdf". Clicking on "Get LaTeX should generate a LaTeX file and the browser should simply open or download that file. Analogously for the pdf. It would even be ok, to have a button "Generate LaTeX" instead, which generates the LaTeX code and changes after the generation to "Get LaTeX" which simply points to the LaTeX file. So it is not really necessary to do the generation of the files on client side. Would be ok, if this is done (on a temporary folder) on server side. For the LaTeX resp. pdf generation I want to use a custom wrapper script for pandoc, let's call it mymarkdown2latex resp. mymarkdown2pdf.

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  • Join me at OpenWorld 2012

    - by Michael Palmeter (Exalogic PM)
    For those of you that will be coming out to Oracle OpenWorld 2012 next ween in San Francisco, I encourage you to take a few minutes on Monday afternoon to come to my session on Oracle Exalogic. Click here for more info: CON9416 - Oracle Exalogic 2.0: Ready-to-Deploy, Mission-Critical Private Cloud My session is one of the first on Oracle Exalogic (one of the privileges of running Product Management for the product) and with that in mind it is going to be something of an introduction and overview.  The material I will present is tailored for C-level customers that are interested in the product but haven't really been exposed to it in any detail.  This is essentially the same sort of presentation I give to customers that visit Oracle HQ, and it provides context for all of the other excellent sessions that follow. During this session I will talk about: The macro-trends in the industry that are driving Exalogic strategy - IT-as-a-Service and infrastructure convergence The first two years of market success with Exalogic - who's bought it, why, and what their results have been Exalogic key features and differentiation - why it's the best possible platform for Oracle business applications and middleware How Exalogic performs, and why it is the hands-down performance champion of Enterprise cloud platforms If you haven't signed up yet, please do.  I'd love to see you there.

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  • Should I care about Junit redundancy when using setUp() with @Before annotation?

    - by c_maker
    Even though developers have switched from junit 3.x to 4.x I still see the following 99% of the time: @Before public void setUp(){/*some setup code*/} @After public void tearDown(){/*some clean up code*/} Just to clarify my point... in Junit 4.x, when the runners are set up correctly, the framework will pick up the @Before and @After annotations no matter the method name. So why do developers keep using the same conventional junit 3.x names? Is there any harm keeping the old names while also using the annotations (other than it makes me feel like devs do not know how this really works and just in case, use the same name AND annotate as well)? Is there any harm in changing the names to something maybe more meaningful, like eachTestMethod() (which looks great with @Before since it reads 'before each test method') or initializeEachTestMethod()? What do you do and why? I know this is a tiny thing (and may probably be even unimportant to some), but it is always in the back of my mind when I write a test and see this. I want to either follow this pattern or not but I want to know why I am doing it and not just because 99% of my fellow developers do it as well.

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  • Is implementing an interface defined in a subpackage an anti-pattern?

    - by Michael Kjörling
    Let's say I have the following: package me.my.pkg; public interface Something { /* ... couple of methods go here ... */ } and: package me.my; import me.my.pkg.Something; public class SomeClass implements Something { /* ... implementation of Something goes here ... */ /* ... some more method implementations go here too ... */ } That is, the class implementing an interface lives closer to the package hierarchy root than does the interface it implements but they both belong in the same package hierarchy. The reason for this in the particular case I have in mind is that there is a previously-existing package that groups functionality which the Something interface logically belongs to, and the logical (as in both "the one you'd expect" and "the one where it needs to go given the current architecture") implementation class exists previously and lives one level "up" from the logical placement of the interface. The implementing class does not logically belong anywhere under me.my.pkg. In my particular case, the class in question implements several interfaces, but that feels like it doesn't make any (or at least no significant) difference here. I can't decide if this is an acceptable pattern or not. Is it or is it not, and why?

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  • One-way platform collision

    - by TheBroodian
    I hate asking questions that are specific to my own code like this, but I've run into a pesky roadblock and could use some help getting around it. I'm coding floating platforms into my game that will allow a player to jump onto them from underneath, but then will not allow players to fall through them once they are on top, which require some custom collision detection code. The code I have written so far isn't working, the character passes through it on the way up, and on the way down, stops for a moment on the platform, and then falls right through it. Here is the code to handle collisions with floating platforms: protected void HandleFloatingPlatforms(Vector2 moveAmount) { //if character is traveling downward. if (moveAmount.Y > 0) { Rectangle afterMoveRect = collisionRectangle; afterMoveRect.Offset((int)moveAmount.X, (int)moveAmount.Y); foreach (World_Objects.GameObject platform in gameplayScreen.Entities) { if (platform is World_Objects.Inanimate_Objects.FloatingPlatform) { //wideProximityArea is just a rectangle surrounding the collision //box of an entity to check for nearby entities. if (wideProximityArea.Intersects(platform.CollisionRectangle) || wideProximityArea.Contains(platform.CollisionRectangle)) { if (afterMoveRect.Intersects(platform.CollisionRectangle)) { //This, in my mind would denote that after the character is moved, its feet have fallen below the top of the platform, but before he had moved its feet were above it... if (collisionRectangle.Bottom <= platform.CollisionRectangle.Top) { if (afterMoveRect.Bottom > platform.CollisionRectangle.Top) { //And then after detecting that he has fallen through the platform, reposition him on top of it... worldLocation.Y = platform.CollisionRectangle.Y - frameHeight; hasCollidedVertically = true; } } } } } } } } In case you are curious, the parameter moveAmount is found through this code: elapsed = (float)gameTime.ElapsedGameTime.TotalSeconds; float totalX = 0; float totalY = 0; foreach (Vector2 vector in velocities) { totalX += vector.X; totalY += vector.Y; } velocities.Clear(); velocity.X = totalX; velocity.Y = totalY; velocity.Y = Math.Min(velocity.Y, 1000); Vector2 moveAmount = velocity * elapsed;

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  • How do you proactively guard against errors of omission?

    - by Gabriel
    I'll preface this with I don't know if anyone else who's been programming as long as I have actually has this problem, but at the very least, the answer might help someone with less xp. I just stared at this code for 5 minutes, thinking I was losing my mind that it didn't work: var usedNames = new HashSet<string>(); Func<string, string> l = (s) => { for (int i = 0; ; i++) { var next = (s + i).TrimEnd('0'); if (!usedNames.Contains(next)) { return next; } } }; Finally I noticed I forgot to add the used name to the hash set. Similarly, I've spent minutes upon minutes over omitting context.SaveChanges(). I think I get so distracted by the details that I'm thinking about that some really small details become invisible to me - it's almost at the level of mental block. Are there tactics to prevent this? update: a side effect of asking this was fixing the error it would have for i 9 (Thanks!) var usedNames = new HashSet<string>(); Func<string, string> name = (s) => { string result = s; if(usedNames.Contains(s)) for (int i = 1; ; result = s + i++) if (!usedNames.Contains(result)) break; usedNames.Add(result); return result; };

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  • Performance impact of Zones.

    - by nospam(at)example.com (Joerg Moellenkamp)
    I was really astonished when i saw this question. Because this question was a old acquaintance from years ago, that i didn't heard for a long time. However there was it again. The question: "What's the overhead of Zones?". Sun was and Oracle is not saying "zero". We saying saying minimal. However during all the performance analysis gigs on customer systems i made since the introduction of Zones i failed to measure any overhead caused by zones. What i saw however, was additional load intoduced by processes that wouldn't be there when you would use only one zone Like additional monitoring daemons, like additional daemons having a controlling or supervising job for the application that resulted in slighly longer runtimes of processes, because such additional daemons wanted some cycles on the CPU as well. So i ask when someone wants to tell me that he measured a slight slowdown, if he or she has really measured the impact of the virtualization layer or of a side effect described above. It seems to be a little bit hard to believe, that a virtualisation technology has no overhead, however keep in mind that there is no hypervisor and just one kernel running that looks and behaves like many operating system instances to apps and users. While this imposes some limits to the technology (because there is just one kernel running you can't have zones with different kernels versions running ... obvious even to the cursory observer), but that is key to it's lightweightness and thus to the low overhead. Continue reading "Performance impact of Zones."

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  • I just received a complaint from a user of the website I maintain. Should I do anything?

    - by Chris
    I was sent sent a large wall of text from a user of the website I maintain at my job. They are clearly upset for having to deal with a horribly outdated web application that has not seen any serious updates in over 6+ years. No refactoring has been done, the code quality is terrible, the security unchecked, policy compliances ignored, in addition to being ugly and frankly embarrassing. Keep in mind this is a small business but the website is used by hundreds daily. I'm one of two programmers there, and I've been working there for two years. This person says they are about my age (22) and understand technology (but can't use proper grammar). The complaint mentioned awkward pages and actions on the website, but they don't even have a clue as to the depth of the flaws in this website. Now, I would love to honestly tell them that there's a lot wrong with this company and that this application was built when we were in high school. And that while it's not my fault that the website is terrible, I'm the one in position to fix it. But on the other hand, I could just say nothing and ignore it. Would doing this publicly have any advantage to future employees (showing integrity) or would it just be a completely pointless mistake? Odds are, even if I respond only that one person will ever read it. Regardless, I'm probably just going to ignore it and continue starting my project to refactor the website.

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  • Installing packages into local directory?

    - by Gili
    I'd like to install software packages, similar to apt-get install <foo> but: Without sudo, and Into a local directory The purpose of this exercise is to isolate independent builds in my continuous integration server. I don't mind compiling from source, if that's what it takes, but obviously I'd prefer the simplest approach possible. I tried apt-get source --compile <foo> as mentioned here but I can't get it working for packages like autoconf. I get the following error: dpkg-checkbuilddeps: Unmet build dependencies: help2man I've got help2man compiled in a local directory, but I don't know how to inform apt-get of that. Any ideas? UPDATE: I found an answer that almost works at http://askubuntu.com/a/350/23678. The problem with chroot is that it requires sudo. The problem with apt-get source is that I don't know how to resolve dependencies. I must say, chroot looks very appealing. Is there an equivalent command that doesn't require sudo?

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  • WUBI installation can no longer boot, UUID disk not found

    - by Joel Heenan
    Yesterday my Wubi/Vista installation was working fine. I shut it down at the train station, all good then when I attempted to boot ubuntu at home I got a message saying the UUID for root could not be found. By booting with the Ubuntu live CD I found that the C:\ubuntu\disks folder stat structure was broken, reported as "??? ??? ??" kinda thing. I booted into Windows, scheduled a CHKDSK, ran that on boot which found some errors and rebooted. Still no dice. I am not stressed because it appears my home directory is still there with all my content so I don't mind re-installing the OS (probably will clean it up some). What is the best path from here to repair the WUBI installation? Is there anything else I should do to repair it? I'm looking at whether the drive is dying now to work out why this occured. Possibly I moved the laptop before shutdown had completed.

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  • Printing Off Center or Images Offset After Upgrade to 14.04 LTS (Brother HL-2240)

    - by fortitude
    :) I have a very frustrating problem with my Brother HL-2240 under Ubuntu 14.04. Bear in mind this was working perfectly under Ubuntu 13.10. In Firefox, when I print a webpage, all of the images are off center and cut off, this is a big deal for my work. In Google Chrome, when I print a webpage, the page is off center, toward the right margin. In Opera, when I print a webpage, all of the white areas within the margins are black, using a lot of toner. PDF opened in document viewer, prints off center. Steps I have taken to troubleshoot: 1) Playing with the printer settings, resetting to defaults, etc. 2) Un-installing the Brother driver and re-installing (linux-brprinter-installer-2.0.0-1 from the Brother website), which works perfectly in Ubuntu 13.10. I see a similar, un-answered question, here. Hopefully this question provides some additional clarity to the matter. If anyone would like some additional detail because she or he is willing to help, please let me know. I can scan output from the printer to show you. Thank you.

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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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  • Is using a dedicated thread just for sending gpu commands a good idea?

    - by tigrou
    The most basic game loop is like this : while(1) { update(); draw(); swapbuffers(); } This is very simple but have a problem : some drawing commands can be blocking and cpu will wait while he could do other things (like processing next update() call). Another possible solution i have in mind would be to use two threads : one for updating and preparing commands to be sent to gpu, and one for sending these commands to the gpu : //first thread while(1) { update(); render(); // use gamestate to generate all needed triangles and commands for gpu // put them in a buffer, no command is send to gpu // two buffers will be used, see below pulse(); //signal the other thread data is ready } //second thread while(1) { wait(); // wait for second thread for data to come send_data_togpu(); // send prepared commands from buffer to graphic card swapbuffers(); } also : two buffers would be used, so one buffer could be filled with gpu commands while the other would be processed by gpu. Do you thing such a solution would be effective ? What would be advantages and disadvantages of such a solution (especially against a simpler solution (eg : single threaded with triple buffering enabled) ?

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  • MongoDB: Replicate data in documents vs. “join”

    - by JavierCane
    Disclaimer: This is a question derived from this one. What do you think about the following example of use case? I have a table containing orders. These orders has a lot of related information needed by my current queries (think about the products; the buyer information; the region, country and state of the sale point; and so on) In order to think with a de-normalized approach, I don't have to put identifiers of these related items in my main orders collection. Instead, I have to repeat all the information for each order (ie: I will repeat the buyer's name, surname, etc. for each of its orders). Assuming the previous premise, I'm committing to maintain all the data related to an order without a lot of updates (because if I modify the buyer's name, I'll have to iterate through all orders updating the ones made by the same buyer, and as MongoDB blocks at a document level on updates, I would be blocking the entire order at the update moment). I'll have to replicate all the products' related data? (ie: category, maker and optional attributes like color, size…) What if a new feature is requested and I've to make a lot of queries with the products "as the entry point of the query"? (ie: reports showing the products' sales performance grouping by region, country, or whatever) Is it fair enough to apply the $unwind operation to my orders original collection? (What about the performance?) I should have to do another collection with these queries in mind and replicate again all the products' information (and their orders)? Wouldn't be better to store a product_id in the original orders collection in order to be more tolerable to requirements change? (What about emulating JOINs?) The optimal approach would be a mixed solution with a RDBMS system like MySQL in order to retrieve the complete data? I mean: store products, users, and location identifiers in the orders collection and have queries in MySQL like getAllUsersDataByIds in which I would perform a SELECT * FROM users WHERE user_id IN ( :identifiers_retrieved_from_the_mongodb_query )

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  • How exactly does app ranking work?

    - by qweasdzxc1
    So I've been in the app industry for around half a year and I still don't know how exactly ranking higher for your app will help increase downloads. That sounds like a question with an obvious answer but this is what's going through my mind so hear me out: Unless your app is ranked within the top 100, no one can see it in the featured categories. So even if my app jumped from 400th to 300th place, would there really even be a difference in downloads? And I'm saying 400th to 300th in ranking in my specific category. Indie developers like me don't even come close to ranking for the overall category. So far, the only usefulness of trying to get a higher rank is to get featured or something like that, but big companies have tons of money to throw on marketing...so the chances of any indie developer getting featured is rare. The only thing that I can see ranking being good for is to rank for your keywords so that when someone searches for that word, your app will hopefully appear in the top 10-25 results. Can anyone confirm my thoughts or add anything else that I might have missed out on? How exactly do users find your app if you're not in the top 100 app in your category?

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