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• Mixin or Trait implementation in AS3?

  - by Brian Heylin

  I'm looking for ideas on how to implement a Mixin/Trait style system in AS3. I want to be able to compose a number of classes together into a single object. Of course this is not a language level feature of AS3, but I'm hoping that there is maybe some way to do this using prototype based techniques or maybe some bytecode hacking that I believe AsMock uses to implement it's functionality. An existing Java example is Qi4J where the user define interfaces that the Qi4j framework implements based on metadata tags and coding by convention. Has anyone any ideas on how to get the Mixin/Trait concept working within AS3?

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• How does Alpha Five Version 10 Rate for Web App Development

  - by Gary B2312321321

  I came across this RDMS via the advert on stackoverflow. Seems to be in the vein of MS Access / Filemaker / Apex database development tools but focused on web based applications. It quotes rave reviews from EWeek and a favourable mention from Dr Dobbs regarding its ability to create AJAX web applications without coding. The Eweek review, apparently written by an ASP.NET programmer, goes on to proclaim the ease at which apps can be extended using the inbuilt XBasic language and how custom javascript can easily be added without wading through code. Has anyone here built a web app with Alpha 5? Does anyone have comments on the development process, the speed of it or limitations they encountered along the way? To me it seems Oracle APEX comes closest to the feature set, has anyone programmed in both and have any comments?

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• Visual Studio 2008 setup looking at wrong drive

  - by Keith G

  I'm trying to add a feature to VS 2008. However, the initial install was done with a DVD in drive D: ... I don't currently have the DVD, so I'm trying to do the updating using an .iso mounted as drive E: ... The VS setup program is not able to find the setup files. Is there a way for me to tell VS 2008 setup to look for files in E: instead of D:? Maybe a registry or ini setting? Edit: The specific error message I got was: A selected drive is no longer valid

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• The reasons to upgrade from Delphi 2009

  - by Serg

  I have made the question "community wiki" - it is subjective. I have upgraded to Delphi 2009 because of unicode support. I have found the anonymous methods a very interesting and useful language feature, I can't say the same about generics. The generics seemed important for me before the upgrade to Delphi 2009, but I have never used them and probably will never use. As for Delphi 2010, I don't need the attributes and I don't like the whole idea of extended RTTI - that is why Delphi 2009 is better for me. Sometimes I hit one or other annoying bug in Delphi 2009 IDE, but they are not critical and I can live with them. I have no plans to develop software for Mac or Linux. Sure sometime I will need 64-bit support, so I think about upgrading to Delphi 2012. Are where any more reasons that can force me to upgrade from Delphi 2009?

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• shutil.rmtree fails on Windows with 'Access is denied'

  - by Sridhar Ratnakumar

  In Python, when running shutil.rmtree over a folder that contains a read-only file, the following exception is printed: File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 216, in rmtree rmtree(fullname, ignore_errors, onerror) File "C:\ActivePython32Python26\lib\shutil.py", line 221, in rmtree onerror(os.remove, fullname, sys.exc_info()) File "C:\ActivePython32Python26\lib\shutil.py", line 219, in rmtree os.remove(fullname) WindowsError: [Error 5] Access is denied: 'build\\pyhg_trunk-win32-x86-hgtip27\\image\\feature-core\\INSTALLDIR\\tcl\\tcl8.5\\msgs\\af.msg' Looking in File Properties dialog I noticed that af.msg file is set to be read-only. So the question is: what is the simplest workaround/fix to get around this problem - given that my intention is to do an equivalent of rm -rf build/ but on Windows? (without having to use unxutils or cygwin)

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• an HTML file is NOT an Excel file, right?

  - by longneck

  we use an application that has an "export to excel" feature that doesn't work on PC's that done have outlook express installed. i know, you're thinking "WTF does outlook express have to do with excel files?" i asked the same thing, and here's what i found: the file being generated is actually one of those Microsoft Single File Web Pages (.mht) and NOT an excel file you need to have outlook express installed to actually view a .mht file. i've explained to their support people that just because you can slap a .xls on a file and excel will open it does not mean its an excel file, and does not mean that this is the right way to do it. how would you explain that this is not proper?

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• Comma or semicolon-delimited AutoComplete TextBox

  - by Ecyrb

  I would like to have a TextBox that supports AutoComplete and lets users type multiple words separated by a comma or semicolon, offering suggestions for each word. I have a standard TextBox with textBox.AutoCompleteCustomSource.AddRange(new[] { "apple", "banana", "carrot" }); textBox.AutoCompleteMode = AutoCompleteMode.SuggestAppend; textBox.AutoCompleteSource = AutoCompleteSource.CustomSource; Unfortunately it will only suggest for the first word. Anything typed after that and it stops suggesting. I want to be able to perform the following scenario: Type "ap" Have it suggest "apple" Press the comma Have it fill in "apple," with the cursor after the comma Type "ba" Have it suggest "banana" Press the comma Have it append "banana," resulting in "apple,banana," I've tried Googling for a solution, but haven't had much luck. This seems to be a popular feature for web apps, but apparently not for winforms. Any suggestions?

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• Mapping functions of 2D numpy arrays

  - by perimosocordiae

  I have a function foo that takes a NxM numpy array as an argument and returns a scalar value. I have a AxNxM numpy array data, over which I'd like to map foo to give me a resultant numpy array of length A. Curently, I'm doing this: result = numpy.array([foo(x) for x in data]) It works, but it seems like I'm not taking advantage of the numpy magic (and speed). Is there a better way? I've looked at numpy.vectorize, and numpy.apply_along_axis, but neither works for a function of 2D arrays. EDIT: I'm doing boosted regression on 24x24 image patches, so my AxNxM is something like 1000x24x24. What I called foo above applies a Haar-like feature to a patch (so, not terribly computationally intensive).

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• Does Team Foundation Server supports Checkpoints?

  - by marco.ragogna

  My dev team used in the past MKS Source Integrity source control and we are not evaluating to migrate to TFS 2010. Some concepts and meaning are a bit different and we need sometime to learn how to do the same things we do before in TFS or how to change our approach. First of all, we used to do Checkpoints for each software release. MKS in this case does a snapshot of all source code files. You can later compare different checkpoints to see the code differences, or extract a whole checkpoint as a build. Does TFS have a similar feature? Do you know where can I read something about it? Thanks in advance, Marco

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• Cost effective online consumer surveys / panels?

  - by Ed

  I am building a Windows based software targeted at consumers, and while I think it's awesome, I'm not sure if my potential customers will. I would like to do some market research to make sure I'm on the right track with the feature set. Unfortunately, I don't have the budget for a large sample size. I understand that I won't be able to get anything near statistical significance on the cheap, but some feedback is better than no feedback I figure. Are there any inexpensive resources for surveying a panel of 100-200 consumers? Thanks!

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• Database design suggestions for a configurable product eshop

  - by solomongaby

  Hello, I am biulding an e-shop that will have configurable products. The configurable parts will need to have different prices and stocks from the main product. What database design would be best in this case? I started with something like this. Features id name Features Options id id_feature value Products id name price Products Features id id_product id_feature value ( save the value from the feature-options for ease in search ) configurable (yes, no) The problem is that now I am stuck on how to save the configurable product features. I was thinking of saving their value as a json. But that will make saving price modification for a certain option difficult. How would you go about this ? Thank you.

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• How to sync with eclipse target management?

  - by SpliFF

  I've been using the Jcraft SFTP plugin for Team Synchronisation up till now but I ran across a rumour it's being deprecated by "Target Management". Still, despite my best efforts I haven't found any information on HOW you are supposed to setup a sync with RSE/Target Management. Can anybody provide a step-by-step guide or at least clarification on whether this is actually possible right now or just a planned feature. I do my testing locally then sync to the remote - which may have changes made by other users. I want to be able to see differences and deal with conflicts etc just like with the current Team Synchronization framework.

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• Good .NET based CMS?

  - by rAm

  For many projects we had to choose a CMS platform. I came across a few CMS platforms based on .NET. I want to know your experience. Community Server (cannot be called a true CMS) DotNetNuke (DNN) Umbraco Kentico Sitefinity Can you please touch upon the following points: UI customization. Feature extension. Third party extensions Support And most important: how much time it takes to learn, as a programmer and someone who manages the application with little or no programming knowledge. Update: thanks for all the responses, I have seen the other thread but did not get a satisfactory reply addressing the Support and Time? (which I forgot to add earlier).

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• Running tasks in the background with lower CPU priority

  - by Brendon Muir

  I have a feature in my CMS that allows a user to upload a zip file full of images and the server will extract them and insert each one into an image gallery. I've noticed that this grinds up the CPU quite severely and causes other requests to slow down. I'm thinking of using the delayed_job plugin to delegate each image addition into the background, but I also want to give that process a lower CPU priority so that it doesn't bog down the server. I'm pretty confident in the delaying part of the exercise, but the throttling part is where I'm stuck. Is there a ruby way of lowering the priority of a method call? It's the image resizing that causes the CPU chew. Any ideas welcome :)

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• IE8 Debugger: how to load external javascript files?

  - by Chris Barnhill

  I have downloaded and installed IE8. I was playing around with the debugger, but I could not figure out how to load external javascript files. It displays the javascript from the main page, but I need to debug the script in the external files. I have googled various articles that show a screenshot of an IE8 debugger with a drop-down for selecting which script to debug, but my debugger does not feature this. Can anyone help me with this? Thanks.

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• Button in gridview

  - by Rajeev

  I'm using a button in a template field of gridview. On button click I want to redirect to another page but it throws an exception: Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" % in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. What can I do to resolve this problem?

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• Upload documents using email and mapping properties of documents

  - by stranger001

  Hi, We have a requirement to upload documents to a specific SharePoint document library when a document is sent via email to a specific email address. I think SharePoint has this feature available. What I would like to know more importantly is mapping the information in the body of the email to the custom properties of the document. For example, if a custom field (property) is added to the document in SharePoint say - "Year". I provide the value of this property within the body of the email and attach the document in email. Is it possible that the provided value in the body of the email for the property is updated in SharePoint when the document is uploaded to SharePoint through email? We are using SharePoint 2007. Appreciate any information on this. Thanks

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• Extending windows based installer to other Operating Systems

  - by Pia

  I have build an installer using NSIS. And now I want to extend it to Solaris and Linux thorugh WINE. But I wanna know few things here- Is WINE flavour dependent? I mean are there different packages for different Linux versions? Whats if my Installer creates some SQL or Oracle database? Will this feature be also supported by WINE? Is there any tool which can be used to build installer which is platform independent?

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• Why are mercurial subrepos behaving as unversioned files in eclipse

  - by noam

  I am trying to use the subrepo feature of mercurial, using the mercurial eclipse plugin . I created and added the .hgsub file in the root repo, put all the mappings of the sub repos in it, and committed + pushed. Then, I pulled the root repo in eclipse, using import-mercurial. Now I see that all the subrepos appear as though they are unversioned (no "orange cylinder" icon next to their corresponding folders in the eclipse file explorer). Furthermore, when I right click on one of the subrepos, I don't get all the hg commands in the "team" menu as I usually get, with root projects - no "pull", "push" etc. Also, when I made a change to a file in a subrepo, and then "committed" the root project, it told me there were no changes found.

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• Trouble Installing the new Android SDK

  - by Dan Monego

  I've installed the newest Android SDK using eclipse's software updates feature to hit the resource at https://dl-ssl.google.com/android/eclipse/. After installing it, it seems like the SDK is integrated into Eclipse, but when I try to create a new project with a single blank activity in it, I get the following error: [2009-06-06 11:41:24 - TestProject] no classfiles specified [2009-06-06 11:41:24 - TestProject] Conversion to Dalvik format failed with error 1 This is using eclipse version 3.4.2 running on top of Mac OS 10.5.7 on a 32 bit processor. Is this a misconfiguration on my part? Have I missed a part of the installation?

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• Make two servers talk to each other

  - by Maksim

  I have application written in GWT and hosted on Google AppEngine/Java. In this application user will have an option to upload video/audio/text file to the server. Those files could be big, up to 1gb or so and because GAE/J does not support large file I have to use another server to store those files. This would be easy to implement if there was no cross-domain security feature in browsers. So, what I'm thinking is to make GAE Server talk to my server (Glassfish or any other java servers if needed) to tell url to the file and if possible send status of uploaded file (how many percent was uploaded) so I can show status on clients screen. Here is what I'm thinking to do. When user loads GWT page that is stored on GAE/J he/she will upload file to my server, then my server will send response back to GAE and GAE will send response to the client. If this scenario is possible what would be the best way to implement GAE to Glassfish conversation?

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• What technical/legal responsibilities do I have when hosting images uploaded by others?

  - by Ferdy

  You may argue that this question has a legal flavor to it, and that would be correct. Still, it is also a question from a developer's perspective that may help others. I'm building an image community web site/application. Users can upload images. During upload, users have to select the license (copyrighted, attribution non-commercial or public domain). No matter which license they choose, it is just a piece of data. No matter the license, all users can view all images and also download all images, as you normally do on websites. My question is: what responsibility do I have as a "platform" to comply with these licenses? Do I need to actively prevent certain actions on these images, and into what extend? Is displaying the license enough to be legally safe? What if one of my users uploads images for which he has no license? Is it enough to just implement a "report this" feature?

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• What are the biggest differences between Scala 2.8 and Scala 2.7?

  - by André Laszlo

  I've written a rather large program in Scala 2.75, and now I'm looking forward to version 2.8. But I'm curious about how this big leap in the evolution of Scala will affect me. What will be the biggest differences between these two versions of Scala? And perhaps most importantly: Will I need to rewrite anything? Do I want to rewrite anything just to take advantage of some cool new feature? What exactly are the new features of Scala 2.8 in general?

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• NDepend: How to not display 'tier' assemblies in dependency graph?

  - by Edward Buatois

  I was able to do this in an earlier version of nDepend by going to tools-options and setting which assemblies would be part of the analysis (and ignore the rest). The latest version of the trial version of nDepend lets me set it, but it seems to ignore the setting and always analyze all assemblies whether I want it to or not. I tried to delete the "tier" assemblies by moving them over to the "application assemblies" list, but when I delete them out of there, they just get added back to the "tier" list, which I can't ignore. I don't want my dependency graph to contain assemblies like "system," "system.xml," and "system.serialization!" I want only MY assemblies in the dependency graph! Or is that a paid-version feature now? Is there a way to do what I'm talking about?

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• Branch by abstraction: Are there "examples" of how it can be done?

  - by Philipp Keller

  Having read Martin Fowlers "Feature Branch" and Flickrs "Flipping Out" (http://www.liip.to/flippingout) I guess there are a few guys out there who do: all (or most) development on Trunk release Trunk regularly (assuming updating your web site) not-yet-approved or not-yet-finished features should not be visible/have no impact on the regular user I've got 2 questions: granted - Flickr's article seems to work for "frontend code". But how is it cleaned up? Don't the ifs pile up? how does this work for the more "backend part"? Thinking of database changes, or model refactoring. Working with ifs doesn't seem to work - and copy-pasting classes for small adaptions also seems awkward. Are there any articles out there answering these 2 questions?

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