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• Can I get the "value" of an arbitrary statement in JavaScript (like eval does, but without eval)

  - by tlrobinson

  In JavaScript is there a way to get the "value" of a statement in the same way that function() { return eval("if (true) { 1 }"); } returns "1"; function() { return if (true) { 1 } } and all similar permutations I've tried are not valid syntax. Is eval just blessed with special powers to determine the "last" value of a statement in an expression? Use case is a REPL that evaluates arbitrary expressions and returns the result. eval works, but I want to wrap it in function.

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• mongo mapper with STI with more than one type?

  - by holden

  I have a series of models all which inherit from a base model Properties For example Bars, Restaurants, Cafes, etc. class Property include MongoMapper::Document key :name, String key :_type, String end class Bar < Property What I'm wondering is what to do with the case when a record happens to be both a Bar & a Restaurant? Is there a way for a single object to inherit the attributes of both models? And how would it work with the key :_type?

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• Is there a WPF "WrapGrid" control available or an easy way to create one?

  - by Jason Coyne

  Essentially I want a wrapPanel, but I would like items to snap to a grid rather than be pressed up to the left, so I can get a nice uniform looking grid, that automatically consumes available space. WrapPanel handles the resize part. WPF.Contrib.AutoGrid handles a nice automatic grid. Anyone got a control that combines them? My use case is I have a series of somewhat irregularly shaped controls. I would like them to appear in nice columns so the wrap panel should snap to the next "tabstop" when placing a control

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• Windows Web Server 2008 R2 Server Core local password complexity

  - by Dennis Allen

  How can I disable the local user account password complexity settings on Windows 2008 R2 "Server Core"? I am trying to migrate our windows 2003 web server to windows 2008 R2. I am trying to see if I can use the "Server Core" install, and it has been a very internet search intensive experience. What I can't find out how to do is to find out how to disable password complexity for local user accounts. While our user account generator currently creates nice strong passwords, there was a time when this was not the case and unfortunately forcing the users to change their password is not an option at this time. Any help greatly appreciated. Dennis

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• IE dropdown z-index bug

  - by Justine

  I'm having a problem with a dropdown menu under IE (6 and 7). http://www.amaconsulting.pl/promocje.html As you can see, the dropdown hides behind the main content area in IE. It's a known bug and general advice is to set a z-index for header and content areas, so IE knows their "place", explained in the article here: http://bit.ly/coSPcI I've set the z-index of .header div to 20 and .featured, .content, .primary, .main to 1, trying to find the right div to fix the problem. While the dropdown stopped hiding behind the .featured div, it still hides behind the main content divs (either .primary or .main, .secondary is fine). The z-indexes for these divs are set in a separate stylesheet, ie.css, in case someone'll be looking for them. If someone could provide some advice, I'd be very grateful.

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• Could not open Selected VM debug port (8700)

  - by John Gaby

  I am trying to debug the android source using Eclipse by following the instructions found at: http://source.android.com/using-eclipse I have downloaded the source, and gotten it to build. I follow the directions in the link above and everything is fine until I run the ddms command. At this point, if Eclipse is running I get the error 'Could not open Selected VM debug port (8700)'. If I close Eclipse, then ddms runs with no problem, and I can the the processes on the emulator. However, if I now open Eclipse, I get the same error. In any case, no matter what I do, if I attempt to remote debug, it always fails with 'Failed to connect to remote VM'. Any ideas? Thanks

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• Howto I get the user domain\username and Display name From SharePoint People Picker InternalId?

  - by Benjamin Wong

  I have been trying to user sharepoint designer to retrieve the user's full name and even the domain\username from the people pucker field but the problem is I tend to get numbers. It looks like the intetrnal Id. In my case I am getting 14 instead of domain\username from the list form's field. Any idea on where I can get the dmain\username or even better the full name? Thanks !! I am using SharePoint Designer and Windows Sharepoint Services 3/SharePoint 2007. Update : I have managed to get the domain\username now. I just had to change the people picker's show field to ID. However now I am getting a weird prefix on my domain\username. I am getting this -1;#domain\username instead of just domain\username. Anybody know how I can overcome this? Thanks !!

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• Translation of clustering problem to graph theory language

  - by honk

  I have a rectangular planar grid, with each cell assigned some integer weight. I am looking for an algorithm to identify clusters of 3 to 6 adjacent cells with higher-than-average weight. These blobs should have approximately circular shape. For my case the average weight of the cells not containing a cluster is around 6, and that for cells containing a cluster is around 6+4, i.e. there is a "background weight" somewhere around 6. The weights fluctuate with a Poisson statistic. For small background greedy or seeded algorithms perform pretty well, but this breaks down if my cluster cells have weights close to fluctuations in the background. Also, I cannot do a brute-force search looping through all possible setups because my grid is large (something like 1000x1000). I have the impression there might exist ways to tackle this in graph theory. I heard of vertex-covers and cliques, but am not sure how to best translate my problem into their language.

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• Changes in gcc/persistence of optimization flags gcc/C

  - by gnometorule

  Just curious. Using gcc/gdb under Ubuntu 9.10. Reading a C book that also often gives the disassembly of the object file. When reading in January, my disassembly looks a lot like the book's; now, it's quite different - possibly more optimized (I notice some re-arrangements in the assembly code now that, at least in the files I checked, look optimized). I have used optimization options -O1 - -O3 for gcc between the first and second read, but not before the first. (1) Is the use of optimization options persistent, aka, if you use them once, you'll use them until switching them off? That would be weird (browsed man file and at least did not see anything to that sort). In the unlikely case that it is true, how do you switch them off? (2) Has gcc's assembly changed through any recent upgrade? (3) Does gcc sometimes produce (significantly) different assembly code although same compile options are chosen? Thanks much.

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• Memory leak with JAXB

  - by Anurag

  Hi, I am getting Out of Memory error: Memory Exception in thread "main" java.lang.OutOfMemoryError: Java heap space at org.apache.xerces.dom.CoreDocumentImpl.createElement(CoreDocumentImpl.java:564) I have a standalone Java program which fetches data from DB and create an XML file using DOM. I get the above error if the data fetched is huge, in my case it is 1,000,000 records. I have defined 2GB as heap size while calling the Java class from unix. I tried it with JAXB, but still do not any significant improvement. Any suggestions how to improve the code.

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• Resolving MSB3247 - Found conflicts between different versions of the same dependent assembly

  - by David Gardiner

  A .NET 3.5 solution ended up with this warning when compiling with msbuild. Sometimes NDepend might help out but in this case it didn't give any further details. Like Bob I ended up having to resort to opening each assembly in ILDASM until I found the one that was referencing an older version of the dependant assembly. I did try using MSBUILD from VS 2010 Beta 2 (as the Connect article indicated this was fixed in the next version of the CLR) but that didn't provide any more detail either (maybe fixed post Beta 2) Is there a better (more automated) approach?

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• Looping to provide multiple lines in linechart (django-googlecharts)

  - by mighty_bombero

  Hi, I'm trying to generate some charts using django-googlecharts. This works fine for rather static data but in one case I would like to render a different number of lines, based on a variable. I tried this: {% chart %} {% for line in line_data %} {% chart-data line %} {% endfor %} {% chart-size "390x200" %} {% chart-type "line" %} {% chart-labels days %} {% endchart %} Line data is a list containing lists. The template code fails with "Caught an exception while rendering: max() arg is an empty sequence". I guess the problem is that I try to loop over templatetags. What approach could be used here? Or am I completely missing something? Is this doable using inclusion tags? Thanks for your help.

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• SQL - .NET - SqlParameters - AddWithValue - Are there any negative performance implications when Par

  - by hamlin11

  http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlparametercollection.addwithvalue.aspx I'm used to adding sql parameters to a sqlCommand using the add() function. This allows me to specify the type of the sqlParameter, but it requires another line to set the value. It's nice to use the AddWithValue function, but it skips the "specify the parameter type" step. I'm guessing this causes the parameters to be sent over as strings contained within single quotes (''), but I'm not sure. Is this the case, and does this cause significantly slower performance of the stored procedures? Note: I understand that it is nice to validate user data on the .NET side of things by specifying the data type for params -- I'm only concerned about reflection-type overhead of AddWithValue either on the .NET or SQL side.

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• What resolution should my Android splash screens be?

  - by Dan Fabulich

  I'm creating a splash screen that will display while my Android application loads. I'd like to create it at the correct size so Android won't auto-scale it up or down to fit the screen. But there are at least three important screen sizes I care about: 320x480, 480x854 (Droid), and 480x800 (Nexus One). I've read the documentation on supporting multiple screen sizes, but I still don't see how I'm supposed to configure different splash screens for Droid/Nexus one (they're both "hdpi" resources as far as Android is concerned), and I don't know exactly how large my splash screen should be in any case. (How tall is the OS title bar/menu in Droid? N1?) What size should I make these images, and how do I tell Android to use the correct size on a given screen?

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• IMAP Idle Timeout

  - by Paul

  Lets say I am using IMAP IDLE to monitor changes in a mail folder. The IMAP spec says that IDLE connections should only stay alive for 30 minutes max, but it is recommended that a lower number of minutes is selected - say 20 minutes, then cancel the idle and restart. I am wondering what would happen if the mail contents changed between the idle canceling, and the new idle being created. An email could potentially be missed. Given that RECENT is a bit vague, this could lead to getting a message list before the old idle ends, and a new idle starts. But this is almost the same as polling every 20 minutes, and defeats some of the benefit of idle. Alternatively, a new idle session could be started prior to terminating the expiring one. But in any case, I think this problem has already been solved so here I am asking for recommendations. Thanks, Paul

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• Recycle remote IIS app pool

  - by Abhijeet Patel

  I would like to use DirectoryServices to list and recycle App Pools hosted on any machine in my Workgroup. My approach is similar to some of the answers posted to this question,but in my case I'd like to do this for a remote machine running IIS 6. I'm prototyping this as a console app but will eventually be providing a web interface to allow recycling a selected app pool for a specified machine. Where can I specify the credentials to use for making Directory Services call to a remote machine. I hope I'm phrasing this correctly.

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• C# - Screenshot of process under Windows Service

  - by Jonathan.Peppers

  We have to run a process from a windows service and get a screenshot from it. We tried the BitBlt and PrintWindow Win32 calls, but both give blank (black) bitmaps. If we run our code from a normal user process, it works just fine. Is this something that is even possible? Or could there be another method to try? Things we tried: Windows service running as Local System, runs process as Local System - screenshot fails Windows service running as Administrator, runs process as Administrator - screenshot fails. Windows application running as user XYZ, runs a process as XYZ - screenshot works with both BitBlt or PrintWindow. Tried checking "Allow service to interact with desktop" from Local System We also noticed that PrintWindow works better for our case, it works if the window is behind another window. For other requirements, both the parent and child processes must be under the same user. We can't really use impersonation from one process to another.

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• header and footer in Prawn PDF

  - by Nik

  Hello all, I have read through all relevant posts on Prawn but found no mentioning (even in Prawn's own documentation) of headers and footers. However, I did see a demo on Prawnto's own website about headers and footers. I copied the entire source of that demo just to see if it works but an error of undefined method "header" is complained about. Am I to understand that Prawn took out header and footer recently in the gem or is there something else I need to do first to use header and footer? The demo page: http://cracklabs.com/prawnto/code/prawn_demos/source/text/flowing_text_with_header_and_footer the part of code of concern: Prawn::Document.generate("flow_with_headers_and_footers.pdf") do header margin_box.top_left do text "Here's My Fancy Header", :size = 25, :align = :center end text "hello world!" end And by header, just in case, I mean the snippets of words that appear usually at a corner of every page of a document. Like your account number in your bills pages. thanks!

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• Probability algorithm: Finding probable correct item in a list (e.g John, John, Jon)

  - by Andrew White

  Hi, Take for example the list (L): John, John, John, John, Jon We are to presume one item is to be correct (e.g. John in this case), and give a probability it is correct. First (and good!) attempt: MostFrequentItem(L).Count / L.Count (e.g. 4/5 or 80% likelihood) But consider the cases: John, John, Jon, Jonny John, John, Jon, Jon I want to consider the likelihood of the correct item being John to be higher in the first list! I know I have to count the SecondMostFrequent Item and compare them. Any ideas? This is really busting my brain! Thx, Andrew

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• How to (pre)start xamlx workflow service

  - by rwwilden

  Related to this question. I have a xamlx workflow service that loads part of its definition from a database when it runs (using ActivityXamlServices.Load). Reason for this is that I need versioning, see the related question. I'll use WCF routing to direct calls to the right service. The part that I load dynamically contains a Receive activity. However, this activity is 'invisible' as long as the workflow doesn't start because the part of the workflow I load from the database is only loaded when the workflow starts. So from the outside it appears as if there is no Receive activity in the workflow. Apart from not being able to generate a contract for the workflow service, I can't call the service either. My first attempt was to do a soap call with the right contract on the workflow service. However, the runtime doesn't automagically activate my workflow in that case. So the question is, how do I start a workflow that is hosted inside IIS? Regards, Ronald

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• rails paperclip and passenger `is not recognized by the 'identify' command`

  - by Joseph Silvashy

  When I upload a photo, my model fails validation, err well even without any validations I'm returned this error: /tmp/stream20100103-13830-ywmerx-0 is not recognized by the 'identify' command. and /tmp/stream20100103-13830-ywmerx-0 is not recognized by the 'identify' command. I'm confident this is not related to ImageMagick because I've removed any image processing from the uploading, also I've tried uploading different mime types, like .txt files and the such. Additionally, I found something that may work. A blog post claims that putting the following in my environment (in this case development.rb) Paperclip.options[:command_path] = "/opt/local/bin"

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• naming conventions for buttons in user interface

  - by Samuel

  User interface for web applications in general contain various buttons for performing CRUD operations. What would be the suggested naming convention for button labels while performing the following actions.. User creation (Add User... or Add User or Add user) Event creation (Add Event... or Add Event or Add event) View users button (List All Users or List All users or List all users ) Most of the sites seem to contain the last option (e.g. Add user) where the first alphabet in the word is capitalized and rest all are lower case). What would be a better practice here?

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• Unit Tests in Visual Studio 2010

  - by Ben

  Hi, i am trying to create a Unit test for a WinForm in a Visual Studio 2010 project. I add a new "Coded UI Test" to my project, open up the code file, then right click and select "Generate Code for Coded UI Test" - "Use Coded UI Test builder". I then start my application up, select "Record" on the UI Map control. I run my tests (in this case simply select a textbox, type in a random value, them click a button). I then select "Generate Code" from the UI Map control which generates the code which the test will use. When running this test, i get the error: Test method HelloWorldTest.CodedUITest1.CodedUITestMethod1 threw exception: Microsoft.VisualStudio.TestTools.UITest.Extension.UITestControlNotFoundException: The playback failed to find the control with the given search properties. Additional Details: TechnologyName: 'MSAA' ControlType: 'Window' Name: 'Form1' ClassName: 'WindowsForms10.Window' --- System.Runtime.InteropServices.COMException: Error HRESULT E_FAIL has been returned from a call to a COM component. Does anyone know where i am going wrong? Thanks

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• Zend - combobox value depending on another combobox value

  - by Sorin Adrian Carbunaru

  Is there a way in Zend Framework to fill a combobox with values depending on the value chosen in a previous combobox, but on the same page? In my case I have a combobox for domain and one for specialization. If i choose Informatics in the first combobox (domain), I want to fill the second one with a single specialization - "Informatics". But if I choose Math in the first, I want to fill the second one with two specialization: "Mathematics" and "Mathematics & Informatics". Thank you! Sorin

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• UIScrollView issue with autorotation and content scaling

  - by boliva

  Hi, I'm building a new (autorotating) iPad app that consists mainly of a screen sized UIScrollView that contains an UIImageView for an image which is 5 times the iPad screen resolution while in portrait mode (3840x1024). What I haven't been able to accomplish is that whenever the device rotates (to whichever orientation) the imageView bounds and the scrollView contentSize asjusts the image for the new height (maintaining its aspect ratio), making the height of the image to always fit the device height for the given orientation (so in the particular case of this image, it would get shown as 2880x768). I tried different combinations of autoresizingMask and contentMode for the imageView but the closer I've been able to get is to effectively display the image at the desired size but with a white padding around it and into the scrollView content (to make up for the original orientation contentSize). I also tried recalculating the scrollView contentSize in the didRotate.../viewWillAnimate... rotation-related methods in my viewController class, with no avail. Best regards and thanks for your time

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