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  • Error when trying to get movies off my Camera

    - by matt wilkie
    How do I retrieve movies and audio files from my Canon PowerShot S5 IS camera? Shotwell only sees the pictures. Mounting the camera via "Places Canon Digital Camera" and then clicking twice on the resulting desktop icon yields this error: could not display "gphoto2://[usb:001,002]/" There is nothing in /media. update: output of sudo fdisk -l Disk /dev/sda: 40.0 GB, 40007761920 bytes 255 heads, 63 sectors/track, 4864 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x3ee33ee2 Device Boot Start End Blocks Id System /dev/sda1 2364 2612 1999872 82 Linux swap / Solaris /dev/sda2 * 1 2364 18979840 83 Linux /dev/sda3 2613 4864 18089159+ f W95 Ext'd (LBA) /dev/sda5 2613 4864 18089158+ b W95 FAT32 Partition table entries are not in disk order Solution: install gphotofs, then Nautilus shows camera contents similar to a standard usb storage device (though note that gphotofs does not yet support adding to or deleting contents).

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  • When is my View too smart?

    - by Kyle Burns
    In this posting, I will discuss the motivation behind keeping View code as thin as possible when using patterns such as MVC, MVVM, and MVP.  Once the motivation is identified, I will examine some ways to determine whether a View contains logic that belongs in another part of the application.  While the concepts that I will discuss are applicable to most any pattern which favors a thin View, any concrete examples that I present will center on ASP.NET MVC. Design patterns that include a Model, a View, and other components such as a Controller, ViewModel, or Presenter are not new to application development.  These patterns have, in fact, been around since the early days of building applications with graphical interfaces.  The reason that these patterns emerged is simple – the code running closest to the user tends to be littered with logic and library calls that center around implementation details of showing and manipulating user interface widgets and when this type of code is interspersed with application domain logic it becomes difficult to understand and much more difficult to adequately test.  By removing domain logic from the View, we ensure that the View has a single responsibility of drawing the screen which, in turn, makes our application easier to understand and maintain. I was recently asked to take a look at an ASP.NET MVC View because the developer reviewing it thought that it possibly had too much going on in the view.  I looked at the .CSHTML file and the first thing that occurred to me was that it began with 40 lines of code declaring member variables and performing the necessary calculations to populate these variables, which were later either output directly to the page or used to control some conditional rendering action (such as adding a class name to an HTML element or not rendering another element at all).  This exhibited both of what I consider the primary heuristics (or code smells) indicating that the View is too smart: Member variables – in general, variables in View code are an indication that the Model to which the View is being bound is not sufficient for the needs of the View and that the View has had to augment that Model.  Notable exceptions to this guideline include variables used to hold information specifically related to rendering (such as a dynamically determined CSS class name or the depth within a recursive structure for indentation purposes) and variables which are used to facilitate looping through collections while binding. Arithmetic – as with member variables, the presence of arithmetic operators within View code are an indication that the Model servicing the View is insufficient for its needs.  For example, if the Model represents a line item in a sales order, it might seem perfectly natural to “normalize” the Model by storing the quantity and unit price in the Model and multiply these within the View to show the line total.  While this does seem natural, it introduces a business rule to the View code and makes it impossible to test that the rounding of the result meets the requirement of the business without executing the View.  Within View code, arithmetic should only be used for activities such as incrementing loop counters and calculating element widths. In addition to the two characteristics of a “Smart View” that I’ve discussed already, this View also exhibited another heuristic that commonly indicates to me the need to refactor a View and make it a bit less smart.  That characteristic is the existence of Boolean logic that either does not work directly with properties of the Model or works with too many properties of the Model.  Consider the following code and consider how logic that does not work directly with properties of the Model is just another form of the “member variable” heuristic covered earlier: @if(DateTime.Now.Hour < 12) {     <div>Good Morning!</div> } else {     <div>Greetings</div> } This code performs business logic to determine whether it is morning.  A possible refactoring would be to add an IsMorning property to the Model, but in this particular case there is enough similarity between the branches that the entire branching structure could be collapsed by adding a Greeting property to the Model and using it similarly to the following: <div>@Model.Greeting</div> Now let’s look at some complex logic around multiple Model properties: @if (ModelPageNumber + Model.NumbersToDisplay == Model.PageCount         || (Model.PageCount != Model.CurrentPage             && !Model.DisplayValues.Contains(Model.PageCount))) {     <div>There's more to see!</div> } In this scenario, not only is the View code difficult to read (you shouldn’t have to play “human compiler” to determine the purpose of the code), but it also complex enough to be at risk for logical errors that cannot be detected without executing the View.  Conditional logic that requires more than a single logical operator should be looked at more closely to determine whether the condition should be evaluated elsewhere and exposed as a single property of the Model.  Moving the logic above outside of the View and exposing a new Model property would simplify the View code to: @if(Model.HasMoreToSee) {     <div>There’s more to see!</div> } In this posting I have briefly discussed some of the more prominent heuristics that indicate a need to push code from the View into other pieces of the application.  You should now be able to recognize these symptoms when building or maintaining Views (or the Models that support them) in your applications.

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  • Using Sql Server Change Data Capture with a frequently changing schema

    - by Pete
    We are looking into enabling Sql Server Change Data Capture for a new subsystem we are building. It's not really because we need it, but we are being pushed for having a complete history traceability, and CDC would nicely solve this requirement with minimum effort on our parts. We are following an agile development process, which in this case means that we frequently make changes to the database schema, e.g. adding new columns, moving data to other columns, etc. We did a small test where we created a table, enabled CDC for that table, and then added a new column to the table. Changes to the new column is not registered in the CDC table. Is there a mechanism to update the CDC table to the new schema, and are there any best practices to how you deal with captured data when migrating the database schema?

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  • Best practice in setting return value (use else or?)

    - by Deckard
    Whenever you want to return a value from a method, but whatever you return depends on some other value, you typically use branching: int calculateSomething() { if (a == b) { return x; } else { return y; } } Another way to write this is: int calculateSomething() { if (a == b) { return x; } return y; } Is there any reason to avoid one or the other? Both allow adding "else if"-clauses without problems. Both typically generate compiler errors if you add anything at the bottom. Note: I couldn't find any duplicates, although multiple questions exist about whether the accompanying curly braces should be on their own line. So let's not get into that.

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  • Should I be using WAI-ARIA in my HTML website builds?

    - by DBUK
    Should I be using WAI-ARIA in my website builds? Will it have any benefit? Is anyone adding 'role' to their code at the moment? The tab, link, checkbox and slider roles, plus many more, aren't available yet for HTML5. From looking at the list of what is available (see below), and what will be coming in the future, it looks like we might be applying roles to a huge amount of tags on our pages. Its not an issue especially if it brings benefit to users using readers etc Also, a side question, will search engines give any benefits to sites using WAI-ARIA? List of safe roles to use (I think) • role="article" • role="banner" • role="complementary" • role="contentinfo" • role="form" • role="heading" • role="main" • role="navigation" • role="search" Examples of usage: <header role="banner"></div>for a main header, banner only allowed once per page <header role="heading"></div>- for all headers after the main one <aside role="complementary"></aside> <form role="search"></form>

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  • What are some cool git or .gitignore tricks & best practices? [closed]

    - by 01walid
    Git is just awesome and fast VCS, however, knowing better this tool will help you incredibly increase your productivity and save your time. Here we can try to make a collection of tips, tricks and useful links to better take advantage of git, this question can have some more sub-questions, I mean: what are some usefull commands that reverse or rectify commits/adding/removing mistakes? what are .gitignore & Global .gitignore best practices? especially with private/secure files that contains passwords, api keys, local config and so on ... .gitignore first or git add <files> first? what are the advantages/disadvantages of both being the first/last. links to blog post, articles, would be sufficient. I thought every sub-question is not worthy opening a whole post each alone, I think centralizing these tips in one question post would help many people.

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  • Virtual Economy Setup - Virtual currencies advice

    - by Sarah Simpson
    I'm trying to figure out how to build my virtual economy. It seems like some games have one currency and some of them have up to 3 and 4 different ones. The game is an action game which is currently single player but I'm planning on adding a tournament mode that allows users to compete against each other. The virtual goods that a user would be able to purchase would be either customization to the character or powerups and utilities that give the character more abilities in the game. The character is able to gain coins during game play. The advice I'm trying to get is whether or not it makes sense to set up more than one currency and more than two currencies? What are the pros and cons? Reference to some resources that indicate research would be great.

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  • Smartassembly 5: it lives! Early Access builds now available

    - by Bart Read
    I'm pleased to announce that, late last week, we put out the first early access build for Smartassembly 5, Red Gate's fantastic code protection and error reporting tool, which we acquired last September. You can download it via: http://www.red-gate.com/messageboard/viewforum.php?f=116 It's obviously pretty early days, so please do not try to use this to protect a production application, but we've already done a lot of work in some key areas: We're simplifying and streamlining the licensing model (you won't see this yet, but a lot of the work on this has already been done). We've improved usability of the product, with a better menu, reordering of project settings, and better defaults. We've also fixed a load of bugs, which I'll let Alex blog about in more detail. On a slightly more trivial level, the curly braces are also no more. Over the coming weeks, we'll be adding more improvements, and starting usability tests. If you're interested in getting involved in the latter, please drop an email to [email protected].

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  • How to enable TRIM on LVM on Ubuntu 12.10?

    - by Siddarth Kaki
    When I reinstalled Ubuntu 12.10 64-bit on my SSD, I chose the option to use LVM in Ubiquity. I am trying to find out how to enable TRIM for my SSD. I came across this article: http://worldsmostsecret.blogspot.com/2012/04/how-to-activate-trim-on-luks-encrypted.html The article states in addition to adding discard and noatime to /etc/fstab , discard must be added to the drive (sdX_crypt) in /etc/crypttab. My problem is the only listings in my /etc/crypttab are several cryptswap; it does not list any sdX_crypt. I currently have a /dev/sda1 (ext2), which is the boot point, and /dev/mapper/ubuntu-root, which is my ext4 partition. Any ideas as to how to enable TRIM?

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  • Best way to address this Magento issue

    - by robgt
    I am in need of some advice/pointers on how best to attack a problem I am faced with in Magento 1.4.0.1. Here is the scenario: Consider a product catalog of multiple thousands of products in which there are many and various retail markup percentages. There is a need to sell some of those products to other retailers, and I need a way to easily categorise them into percentrage markup groups, so that the other traders can easily purchase items from us without needing to call and confirm pricing. All products prices are added to the magento database including VAT - so the actual retail value is the starting point. I think this needs to be done by adding an attribute on the products that determines the maximum discount level that can be applied to any given product. Obviously, this would entail a massive amount of work to update every product. Is there a way to achieve what we need that I don't yet know about (within Magento)? Can single attribute values be mass-populated somehow, without affecting other attributes such as name/description/etc?

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  • Studies on code documentation productivity gains/losses

    - by J T
    Hi everyone, After much searching, I have failed to answer a basic question pertaining to an assumed known in the software development world: WHAT IS KNOWN: Enforcing a strict policy on adequate code documentation (be it Doxygen tags, Javadoc, or simply an abundance of comments) adds over-head to the time required to develop code. BUT: Having thorough documentation (or even an API) brings with it productivity gains (one assumes) in new and seasoned developers when they are adding features, or fixing bugs down the road. THE QUESTION: Is the added development time required to guarantee such documentation offset by the gains in productivity down-the-road (in a strictly economical sense)? I am looking for case studies, or answers that can bring with them objective evidence supporting the conclusions that are drawn. Thanks in advance!

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  • Backup systems config files

    - by David ???
    I'm planning on installing nVidia proprietary drivers on my Ubuntu 10.10. Historically this always ends-up with me being left with no graphical interface. No ability to revert - and reinstalling the whole system. So now, before trying this anew, I wish to backup all relevant config files. I'll try 1 or 2 methods. I'll list each one's commands. I'll appreciate if anyone can tell me how to backup the relevant file, or what's the reverse of this operation. 10x, David Method I - as described here: apt-get --purge remove xserver-xorg-video-nouveau As described in this answer: edit /etc/default/grub and add the line GRUB_CMDLINE_LINUX="nouveau.modeset=0" sudo update-grub Reboot Install original drivers downloaded from nVidia site. Method II - as described here: sudo apt-get purge nvidia* [possibly 'sudo gedit /etc/modprobe.d/blacklist.conf' adding 'vga16fb' 'nouveau' sudo apt-get install nvidia-glx-185 sudo modprobe nvidia sudo lsmod | grep -i nvidia sudo nvidia-xconfig

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  • DockbarX Applet not loading

    - by Nik
    I used to have dockbarX applet installed on my gnome panel. However one day when I login in I got a error message which can be seen in the screenshot below. So I removed it, and then tried adding it again to the gnome panel but I still get the error message. I am running the latest version of dockbarX 0.43 with the helpers enabled and media buttons etc. I did not update it recently and have been using this version for a couple of weeks now and got this problem only now. How can I solve this problem?

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  • IIS 6 405 error when POSTing through I-Frame

    - by Angelo R.
    Before I begin, I must add that I am more of a programmer, so please be patient :p I have a 2003 server running IIS 6. I am trying to create a Facebook application that accesses a url on my server through an I-Frame. However, Facebook is trying to send some data via POST to my page. I assumed it wouldn't be a problem since the page is .html, but I keep receiving 405 errors (Incorrect Verbs) when trying to access it. Since these are generated by IIS, I had hoped there would be a way for me to allow html files to accept POST. However, after a lot of Googling, it seems like that isn't possible, so instead I figure I can convert the page to an aspx one, and that should work... however I am running in to the same issue. I thought that simply adding POST to the .aspx entry in Application Extension Mapping would work, but it still doesn't. Does anyone know what the problem could potentially be?

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  • Scrum for Team System v3 RTM available

    - by Enrique Lima
    If you are using the Scrum for Team System (aka Conchango Scrum Template), it has hit RTM and it is available for download.  First you will need to register and then you will ne able to access the goods. There is also a very well laid out Getting Started with v3 guide, put together by Crispin Parker. Note:  Very important to know and consider, is the fact there is no upgrade or migration strategy laid out from v2.2.  So you are left to your own devices on that one.  There are plenty of discussions going on as far as making it happen.  Don’t get me wrong v2.2 work items will be present and you will be able to use them, just don’t expect the v3 template to trigger when  adding new work items. For now, get TFS in place, install the template and start fresh.  The Workbench should be released soon too, and that makes it a great component to this solution.

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  • New Enhanced Visual WebGui WINWEB and .NETHTML5 Versions

    - by Webgui
    After a long wait and huge anticipation from the Visual WebGui community, I am happy to announce the release of new versions for the WINWEB and .NETHTML5 branches. The new 6.4.0 Release d and 6.4.0 beta3 versions are available after an extensive work on core capabilities of Visual WebGui including extension of existing controls and adding new controls such as Strip Controls, RibbonBar, DataGridView, ComboBox, PropertyGrid and RadioButton, DataGridView, ComboBox, PropertyGrid and RadioButton, as well as some major enhancements to both versions in terms of cross-browser support and performance.We apologize for the delay in the release of those most expected versions, but we believe that the extra time lead to a more mature and complete product. As you can see the changelog is pretty long and includes a list of enhancements, new features and bug fixes: http://visualwebgui.com/Developers/KB/tabid/654/article/w_changelogs/Default.aspx The new versions are available for all versions with open source and for The new versions are available for all versions with open sources for Visual Studio 2005, 2008 and 2010. You are welcome to download the WINWEB Free Trial and the Free .NETHTML5 beta on the downloads page.

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  • How do I fix DNS resolving which doesn't work after upgrading to Ubuntu 13.10 (Saucy)

    - by Witek
    After upgrade to 13.10 my DNS resolving fails. It seams the DNS servers which I get by DHCP (LAN) are not used. I could temporary solve the problem by adding nameserver 8.8.8.8 to /etc/resolv.conf. But then the intranet hosts still can not be resolved. When clicking on the Connection Information menu item on the network indicator, the Primary DNS and the Secondary DNS are set correctly. But my computer seams not to use them. So my questions: What should I put into resolv.conf, if anything? How to find out, which name servers my computer is querying? Where to look next, to find out, why name servers received by DHCP are not used?

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  • How likely are IE9 jumplists to be useful?

    - by Grant Palin
    Having installed the Internet Explorer 9 release, I've experimented with the jumplists feature available in Windows 7 - drag a site tab down to the taskbar to create a jumplist. Works for Facebook and Twitter, anyway. I have my suspicions about the utility of this feature - it's a neat and possibly useful feature, yet is limited to the combination of IE9 and Windows 7, plus sites implementing the appropriate code. Given the relatively small audience at this point, is there any value in adding code to support this feature? And would it likely be more useful for a web application (e.g. Twitter, Facebook) than a typical website?

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  • Is there a better way to run ubuntu from usb disk

    - by Adam Butler
    I have an old laptop with a broken hard drive controller and am running the previous ubuntu from a usb. I installed this as per standard instructions by running some program that copied the live cd to the usb. This has had a few problems, it seems like it was just made for trying and not for everyday use. Ideally I would like to do a proper install to the usb disk instead of just running off the installer disk. Is there a way to do this? The main problems I have are: When adding mounts to fstab it gets overwritten on each reboot When installing updates the kernel cannot be updated

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  • How can I sell a legacy program rewrite to the business?

    - by Wil
    We have a legacy classic ASP application that's been around since 2001. It badly needs to be re-written, but it's working fine from an end user perspective. The reason I feel like a rewrite is necessary is that when we need to update it (which is admittedly not that often) then it takes forever to go through all the spaghetti code and fix problems. Also, adding new features is also a pain since it was architect-ed and coded badly. I've run cost analysis for them on maintenance but they are willing to spend more for the small maintenance jobs than a rewrite. Any suggestions on convincing them otherwise?

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  • Should extension scripts be run in a sandbox?

    - by Cubic
    In particular, this is about game extensions written in lua (luajit-2.0). I was contemplating whether I should restrict what these scripts can do, and arrived at the conclusion that I probably shouldn't: It's hard to get right. Sounds silly, but chances are my sandbox is gonna end up leaky anyways. The only benefit I could think of would be giving users some sense of security when running third party scripts. The disadvantages would be that it's just incredibly annoying for extension writers. That is, for now, myself (game content will be mostly scripted). The reason I'm asking this now before I actually have anything presentable is that adding a sandbox early on is easy, but would impose said annoying restrictions on myself too. However if I first go on with it and then later decide I do need a sandbox after all, I'm gonna run into problems (I'd either have to rewrite the scripts that are already there, or introduce some form of trust management system which seems to be more trouble than it's worth).

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  • Webcast: Introduction To Causal Factors

    - by ChristineS-Oracle
    Webcast: Introduction To Causal Factors Date: June 11, 2014 at 11:00 am ET, 10:00 am CT, 9:00 am MT, 8:00 am PT, 8:30 pm, India Time (Mumbai, GMT+05:30) This one hour advisor webcast will provide an introduction to causal factors for Demand Management and AFDM. Pre-seeded causal factors will be discussed as well as when they are not appropriate. Scenarios of when to add causal factors will be covered and best practice method of adding and using. Topics will include: Causal factors in DM and AFDM Pre-seeded causal factors When to modify causal factor settings Best practice when working with causal factors Details & Registration: Doc ID 1664606.1

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  • Why UFW has to be (re)started at boot time if it's only iptables rule manager?

    - by Tomasz Zielinski
    README from source package says: When installing ufw from source, you will also need to integrate it into your boot process for the firewall to start when you restart your system. Depending on your needs, this can be as simple as adding the following to a startup script (eg rc.local for systems that use it): # /lib/ufw/ufw-init start For systems that use SysV initscripts, an example script is provided in doc/initscript.example. See doc/upstart.example for an Upstart example. Consult your distribution's documentation for the proper way to modify your boot process. On my system I have this: # /etc/ufw/ufw.conf # # Set to yes to start on boot. If setting this remotely, be sure to add a rule # to allow your remote connection before starting ufw. Eg: 'ufw allow 22/tcp' ENABLED=yes So, why does simple iptables rule manager need to be started at boot time? Is there any secret to that, or it merely checks if all rules are in place ?

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  • How do I start xterm with a headless system?

    - by NeViXa
    I'm running Ubuntu 12.04 and I want to boot directly and headless in the terminal (no GUI). After that I want to startx to start a program in xterm. When I boot 'headed', everything is working like supposed to, but: - When I boot headless, startx is not working (no screens found) I already tried to change xorg.conf to below, but it didn't not work: Section "Device" Identifier "VNC Device" Driver "vesa" EndSection Section "Screen" Identifier "VNC Screen" Device "VNC Device" Monitor "VNC Monitor" SubSection "Display" Modes "1280x1024" EndSubSection EndSection Section "Monitor" Identifier "VNC Monitor" HorizSync 30-70 VertRefresh 50-75 EndSection How can I boot headless and still be able to run startx? ANSWER: Adding the BusID to the Devices section in the xorg.conf above, fixed the problem for me. BusID "PCI:1:00:1"

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  • Creating models in 3ds max and exporting as .x for XNA

    - by Sweta Dwivedi
    I have created a few models in 3DS max which contains textures, geometry and animations . .however .fbx doesnt really support textures.. So im planning to use .x format.. I have seen a few converters in pandasoft but once i unzip the file and place the .dle file in the plugins folder of 3D max gives an error saying failed to initialize.. Is there any way to convert my .max models into .x format ? ? I dont know blender so that isnt an option. . I'm currently using 3ds max 2013 After adding the .3DS object content importer. . i get the following error:

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