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Articles indexed Wednesday April 28 2010

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  • linq2sql and multiple joins

    - by zerkms
    is it possible to do multiple joins: from g in dataContext.Groups join ug in dataContext.UsersGroups on g.Id equals ug.GroupId join u in dataContext.Users on u. where ug.UserId == user.Id select GroupRepository.ToEntity(g); in the sample above all is fine until i press "." in the end of the 3rd line. there i expect to get intellisense and write u.Id == ug.UserId but it doesn't appear. and of course this code doesn't compile after. what did i wrong?

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  • How to stream sound from an esx virtual machine ?

    - by Adrien
    Hi, I try to play sound from my monitoring application, which is an xp virtual machine on VMware ESX 3, on a physical machine with a real sound card, but I can not add from the ESX console sound card. Currently, I transmit sound with opening an RDP session and play it in this session. I would like to play sound without openning RDP session, do you have a solution to add a virtual sound card and then stream it with vlc?

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  • How to know disk quota on network share in windows?

    - by myforwik
    I connect to a share on a windows server and I have a quota of unknown size. All the tools I have seen are reporting the disk size/disk free space, not the quota size for myself. The only way I can figure out my quotas is to keep writing junk until I reach the quota. There must be a better way than this? My PC is windows XP and the servers are mainly 2003server.

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  • Working with Sub-Optimal Disk Configurations (Making the best of what you’ve got)

    - by Jonathan Kehayias
    This is the first post in a what will be a series of posts on working with a sub-optimal disk configuration to squeeze as much performance out of it as possible.  You might ask what a Sub-Optimal Disk Configuration?  In this case it is a Dell Powervault MD3000 with 15 Seagate Barracuda ES.2 SAS 1 TB 7.2K RPM disks (Model Number ST31000640SS).  This equates to just under 14TB of raw storage that can configured into a number of RAID configurations.  In this case, the disk array...(read more)

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  • Interface design pattern / Java / Seam

    - by Walter White
    Hi all, Is this possible somehow? @Name("geolocationService") public interface GeolocationService { @Query("SELECT g FROM Geolocation geolocation INNER JOIN geolocation.deployment deployment WHERE geolocation.ipStart <= INET_ATON(:ipAddress) AND deployment.active = TRUE") Geolocation findByIpAddress(@NamedParameter("ipAddress")final String ipAddress); } public GeolocationAction { @In private GeolocationService geolocationService; @RequestParameter("ipAddress") private String ipAddress; @Out private Geolocation geolocation; public void find() { geolocation = geolocationService.findByIpAddress(ipAddress); } } Is it possible to do this without implementing the interface? What is required to make that work? I want to maintain less and do more. If I can intercept invocations of the geolocationService then I am golden, how would I do that? I don't want it to ever be instantiated, so it will always be null (I don't want the @Name and @In annotations either then). Walter

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  • What is the proper way to declare a specialization of a template for another template type?

    - by Head Geek
    The usual definition for a specialization of a template function is something like this: class Foo { [...] }; namespace std { template<> void swap(Foo& left, Foo& right) { [...] } } // namespace std But how do you properly define the specialization when the type it's specialized on is itself a template? Here's what I've got: template <size_t Bits> class fixed { [...] }; namespace std { template<size_t Bits> void swap(fixed<Bits>& left, fixed<Bits>& right) { [...] } } // namespace std Is this the right way to declare swap? It's supposed to be a specialization of the template function std::swap, but I can't tell whether the compiler is seeing it as such, or whether it thinks that it's an overload of it or something.

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  • Javascript to take a screenshot of a website without using ActiveX

    - by Jourkey
    I have a JS app that an user interacts with. I need to save the appearance of the interface at the current time, crop out the part that I need (or only shot the part that I need by specifying the div), and send it back to the server. Clearly any external services would not be able to do this, I need a javascript (or flash) script that can save the screen appearance. Is this possible? Thanks. Also, as the comment below says, I cannot use Active X.

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  • Simple in-place discrete fourier transform ( DFT )

    - by Adam
    I'm writing a very simple in-place DFT. I am using the formula shown here: http://en.wikipedia.org/wiki/Discrete_Fourier_transform#Definition along with Euler's formula to avoid having to use a complex number class just for this. So far I have this: private void fft(double[] data) { double[] real = new double[256]; double[] imag = new double[256]; double pi_div_128 = -1 * Math.PI / 128; for (int k = 0; k < 256; k++) { for (int n = 0; n < 256; n++) { real[k] += data[k] * Math.Cos(pi_div_128 * k * n); imag[k] += data[k] * Math.Sin(pi_div_128 * k * n); } data[k] = Math.Sqrt(real[k] * real[k] + imag[k] * imag[k]); } } But the Math.Cos and Math.Sin terms eventually go both positive and negative, so as I'm adding those terms multiplied with data[k], they cancel out and I just get some obscenely small value. I see how it is happening, but I can't make sense of how my code is perhaps mis-representing the mathematics. Any help is appreciated. FYI, I do have to write my own, I realize I can get off-the shelf FFT's.

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  • Other use for a Hibernate Mapping file

    - by eerik
    I am trying to define db dependency for a web based application, and was thinking that perhaps the hibernate mappings used in the application might be importable into some sort of tool to produce a visual ERD diagram. Has anyone tried something like this?

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  • VS2010 and Windows XP SP3

    - by abjbhat
    At home I've been running VS 2010 on a Windows 7 x64 machine without any issues, however at work we recently switched over to VS 2010 running on WinXP SP3 x86 - and I gotta say, the experience is terrible. There are severe graphical glitches. For ex, Intellisense doesn't quite work. You can start typing and the intellisense dropdown window seems to be working, but the text I'm typing vanishes. I can't see it until I hit the Escape key or refresh the window by say, alt-tabbing to another application and then back again to VS2010 If I cut/copy/paste and then move the cursor around by scrolling or using the arrow keys, different parts of the text window don't update themselves properly. I can see patches of a different piece of code where it shouldn't be. Other team members are also facing the similar issues as well. Is there some patch that I should install? I have already installed the UIA 3 patch ScottGu mentioned in his blog. Any help would be appreciated. -Thanks!

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  • using declarations in main (C++)

    - by Crystal
    Although you wouldn't want to do this, if you have a namespace COMPANY, and a class in that namespace SOMECLASS. Why is it that in the .cpp file, you might define the functions as COMPANY::SOMECLASS::someFunction() {} But in main, you don't do int main() { COMPANY::SOMECLASS::someFunction(); } but instead you declare the namespace and do something like: using COMPANY::SOMECLASS; int main() { someFunction(); }

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  • Query a range of date

    - by juniorSE
    Hello Guys, Im trying to query a sort of from - to date. e.g. 20-01-2010 to 20-02-2010. this should include the mentioned dates. i've tried the following queries but none works. select * from [tableName] where date = '20-01-2010' AND date <= '20-02-2010' the date where date is equal to 20-02-2010 does not show. i don't know why. select * from [tableName] where date between '20-01-2010' AND '20-02-2010' the mentioned dates is not included in the results. i want it to be included in the results. please help. thanks in advance! :)

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  • C++ Translation Phase Confusion

    - by blakecl
    Can someone explain why the following doesn't work? int main() // Tried on several recent C++ '03 compilers. { #define FOO L const wchar_t* const foo = FOO"bar"; // Will error out with something like: "identifier 'L' is undefined." #undef FOO } I thought that preprocessing was done in an earlier translation phase than string literal operations and general token translation. Wouldn't the compiler be more or less seeing this: int main() { const wchar_t* const foo = L"bar"; } It would be great if someone could cite an explanation from the standard.

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  • How do I call overloaded Java methods in Clojure.

    - by Pat Wallace
    For this example Java class: package foo; public class TestInterop { public String test(int i) { return "Test(int)"; } public String test(Object i) { return "Test(Object)"; } } When I start Clojure and try to call the test(int) method, the test(Object) method is called instead, because Clojure automatically boxes the integer into a java.lang.Integer object. How do I force Clojure to call the test(int) method? user=> (.test (new foo.TestInterop) 10) "Test(Object)" I want to call methods like Component.add(Component comp, int index) in AWT, but instead keep calling add(Component comp, Object constraints), so the buttons on my toolbar always appear in the wrong order.

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  • Add a value to an element in a list of sets

    - by Kapelson
    Hello. I'm using python, and I have a list of sets, constructed like this: list = [set([])]*n ...where n is the number of sets I want in the list. I want to add a value to a specific set in the list. Say, the second set. I tried list[1].add(value) But this instead adds the value to each set in the list. This behaviour is pretty non-intuitive to me. Through further tests, I think I've found the problem: the list apparently contains 10 instances of the same set, or ten pointers to the same set, or something. Constructing the list through repeated calls of list.append(set([])) allowed me to use the syntax above to add elements to single sets. So my question is this: what exactly is going on in my first list-construction technique? It is clear I don't understand the syntax so well. Also, is there a better way to intialize an n-element list? I've been using this syntax for a while and this is my first problem with it.

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  • Is there a way of executing embedded ruby in a javascript file in my /public/javascripts directory?

    - by brad
    I have a form with an ever-growing amount of associated javascript. At present this javascript lives in my form view which is fine, but it's getting larger and starting to overwhelm the form making it difficult to work on the form. I want to put this in a separate file in my /public/javascripts directory but a lot of the javascript is generated by embedded ruby. This embedded ruby is ignored and passed through to the browser if I just put the code here. What is the best way (if any) of having this embedded ruby executed and the javascript being generated in the same way as if it were in my view?

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  • What is a good Visio Enterprise Architect replacement?

    - by MattValerio
    I've been using Visio 2002/2003 Enterprise Architect to do my database schema design visually and then forward-generate the DDL to create the database. I wanted to switch to Visio 2007, but while it does have database diagramming support, it doesn't have the ability to generate DDL. Bummer. I am really disappointed because it seems like Microsoft has completely abandoned this feature. You can't do it in Visual Studio (that I've found). You can sorta do it with SQL Server Management Studio if you insert database diagrams into your database, but any edits to the schema immediately take effect. Has anyone found a good program to do this? I'm hoping to find one that is free and can generate DDL/SQL for SQL Server.

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  • Selenium RC selenium-testrunner.js Access denied error on IEProxy - Help??

    - by melaos
    Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E) Timestamp: Wed, 28 Apr 2010 02:07:17 UTC Message: Access is denied. Line: 177 Char: 9 Code: 0 URI: http://www.google.com/selenium-server/core/scripts/selenium-testrunner.js Hi guys, i'm just starting to learn up on selenium and while testing using mostly test cases and test suite creating using selenium IDE firefox, i'm having some problem getting it to work properly in internet explorer. this is the cmd line that i'm using: java -jar "selenium-server.jar" -htmlSuite *iexploreproxy "http://www.google.com/" tests/OR_Discount_UAT_Suite.htm results.html -userExtensions user-extensions.js i try using the *iexplore but kept getting session id expired error and try with the proxy version instead. i can now see the testrunner but keep getting the access denied error. i then try the same cmd line using firefox: java -jar "selenium-server.jar" -htmlSuite *firefox3 "http://www.google.com/" tests/OR_Discount_UAT_Suite.htm results.html -userExtensions user-extensions.js FYI, i've already unchecked the auto detect proxy setting in IE8. and i can get everything running perfectly. so im not sure what's the problem right now :( anybody can help? thanks!

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