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  • Random walk- Brownian Motion

    - by Sam
    I've been assigned the project of creating a simple console app. that models brownian motion in a 2D plane. I wasn't given much information on how to do so (and I'm hoping that it's a pretty popular assignment so that I could get some insight) just that it relies on random number generation. I researched brownian motion for a little bit and saw some formulas that looked complicated, but by the description is just seems to have to move randomly within a certain number interval. Can anyone clarify? Am I to create a program that continually creates a random number in an interval and then modify the particles "x" and "y" coordinate or is there more to it? Thanks for any help.

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  • Get PropertyInfo from property instead of name

    - by Sam
    Say, for example, I've got this simple class: public class MyClass { public String MyProperty { get; set; } } The way to get the PropertyInfo for MyProperty would be: typeof(MyClass).GetProperty("MyProperty"); This sucks! Why? Easy: it will break as soon as I change the Name of the Property, it needs a lot of dedicated tests to find every location where a property is used like this, refactoring and usage trees are unable to find these kinds of access. Ain't there any way to properly access a property? Something, that is validated on compile time? I'd love a command like this: propertyof(MyClass.MyProperty);

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  • Accessing Custom Configurations in NUnit class

    - by Martin Ongtangco
    I'm really banging my head onto this one. I can't make the Custom Configuration to work with NUnit. It kept on failing to read the configuration file. I followed carefully this article: http://devlicio.us/blogs/derik_whittaker/archive/2006/11/13/app-config-and-custom-configuration-sections.aspx placed the references in the Unit test class App.Config, still everything failed. Is there some sort of a magic setting to do here?

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  • How to use SSL with a WCF web service?

    - by Martin
    I have a web service in asp.net running and everything works fine. Now I need to access some methods in that web-service using SSL. It works perfect when I contact the web-service using http:// but with https:// I get "There was no endpoint listening at https://...". Can you please help me on how to set up my web.config to support both http and https access to my web service. I have tried to follow guidelines but I can't get it working. Some code: My TestService.svc: [ServiceContract(Namespace = "")] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class TestService { [OperationContract] [WebGet(ResponseFormat = WebMessageFormat.Json)] public bool validUser(string email) { return true; } } My Web.config: <system.serviceModel> <serviceHostingEnvironment aspNetCompatibilityEnabled="true" multipleSiteBindingsEnabled="true" /> <behaviors> <endpointBehaviors> <behavior name="ServiceAspNetAjaxBehavior"> <enableWebScript /> </behavior> </endpointBehaviors> <serviceBehaviors> <behavior name="ServiceBehavior"> <serviceDebug includeExceptionDetailInFaults="true" /> </behavior> <behavior name=""> <serviceMetadata httpGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="false" /> </behavior> </serviceBehaviors> </behaviors> <services> <service behaviorConfiguration="ServiceBehavior" name="TestService"> <endpoint address="" behaviorConfiguration="ServiceAspNetAjaxBehavior" binding="webHttpBinding" bindingConfiguration="ServiceBinding" contract="TestService" /> </service> </services> <bindings> <webHttpBinding> <binding name="ServiceBinding" maxBufferPoolSize="1000000" maxReceivedMessageSize="1000000"> <readerQuotas maxDepth="1000000" maxStringContentLength="1000000" maxArrayLength="1000000" maxBytesPerRead="1000000" maxNameTableCharCount="1000000"/> </binding> </webHttpBinding> </bindings> </system.serviceModel>

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  • In TDD, should tests be written by the person who implemented the feature under test?

    - by martin
    We run a project in which we want to solve with test driven development. I thought about some questions that came up when initiating the project. One question was: Who should write the unit-test for a feature? Should the unit-test be written by the feature-implementing programmer? Or should the unit test be written by another programmer, who defines what a method should do and the feature-implementing programmer implements the method until the tests runs? If I understand the concept of TDD in the right way, the feature-implementing programmer has to write the test by himself, because TDD is procedure with mini-iterations. So it would be too complex to have the tests written by another programmer? What would you say? Should the tests in TDD be written by the programmer himself or should another programmer write the tests that describes what a method can do?

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  • How to merge arrays with same key and different value in PHP?

    - by Martin
    Hi guys, I have arrays similarly to these: 0 => Array ( [0] => Finance / Shopping / Food, [1] => 47 ) 1 => Array ( [0] => Finance / Shopping / Food, [1] => 25 ) 2 => Array ( [0] => Finance / Shopping / Electronic, [1] => 190 ) I need to create one array with [0] as a key and [1] as value. The tricky part is that if the [0] is same it add [1] to existing value. So the result I want is: array ([Finance / Shopping / Food]=> 72, [Finance / Shopping / Electronic] => 190); thanks

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  • start service under logged on user account by changing token

    - by sam
    hi all,i have a desktop application that install and start a service,i know a process can get the explorer.exe token and lunch another process with the tkoen,it means the second process will run us logged on account, my question is this that can i start my service by explorer.exe token too ? is there is an example in delphi? thx for ur time

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  • Change div order in CSS or javascript

    - by Sam Holder
    say I have layout like so: <div id="main"> <div id="NormalContent"> {some content which is a fixed length list} </div> <div id="FeaturedContent"> {some content which may contain a long list} </div> </div> and I want to place FeaturedContent above NormalContent. Can I do this with CSS? I assume I can with Javascript?

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  • How do I set a static bool in another app domain?

    - by Martin
    How do I programatically set the value of a static boolean in another app domain? I'm testing an application where I need to change a bool value. Problem is that the bool value exists as a static instance on a type hosted in another app domain. (I'm doing this for test purposes, it won't be used in production code)

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  • Do I need to syncronize thread access to an int

    - by Martin Harris
    I've just written a method that is called by multiple threads simultaneously and I need to keep track of when all the threads have completed, the code uses this pattern: private void RunReport() { _reportsRunning++; try { //code to run the report } finally { _reportsRunning--; } } This is the only place within the code that _reportsRunning's value is changed, and the method takes about a second to run. Occasionally when I have more than six or so threads running reports together the final result for _reportsRunning can get down to -1, if I wrap the calls to _runningReports++ and _runningReports-- in a lock then the behaviour appears to be correct and consistant. So, to the question: When I was learning multithreading in C++ I was taught that you didn't need to synchronize calls to increment and decrement operations because they were always one assembly instruction and therefore it was impossible for the thread to be switched out mid-call. Was I taught correctly, and if so how come that doesn't hold true for C#?

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  • Position: absolute a div over Flash

    - by Sam
    Is it possible to position: absolute a <div /> over a Flash banner without adding wmode="transparent" to the banner? I have a lightbox that needs to appear above my ads but I can't directly modify the banners as they come from a third party.

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  • How to build the SysUtils.Format string function in Delphi?

    - by Sam
    If I have the following Delphi code type TFormatArgs = array of TVarRec; procedure DelphiGodsGiveMeTheAnswerPrettyPlease; var iMyAge: integer; iMyIQ: integer; sCode: string; sText: string; begin iMyAge := 5; iMyIQ := -5; sCode := 'Format(''My age is %d and my IQ is %d'', [iMyAge, iMyIQ])'; sText := FormatThis(sCode, iMyAge, iMyIQ); end; function FormatThis(sFormatCode: string; iVar1: integer; iVar2: integer): string; var sFormatString: string; arFormatArgs: TFormatArgs; begin sFormatString := GetFormatString(sFormatCode); // I can implement this function arFormatArgs := ConstructFormatArgs(iVar1, iVar2); // NEED HELP HERE! result := SysUtils.Format(sFormatString, arFormatArgs); end; How can I implement my ConstructFormatArgs function in Delphi (not Assembly)? I'm afraid the assembly code in SysUtils.WideFormatBuf is just a little bit beyond my comprehension skills! Any ideas? I'm seeking divine assistance. Even if you can contribute just a little hint here and there on how to improve it or help me progress with this exercise. TIA.

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  • Specify build folder for iphone application

    - by Martin KS
    I've written an app that uses some of the user's camera roll images, and while it does so it stores them in the application root directory. The problem I have is that whenever I re-compile my application it changes the folder to which the application is installed. Is there any way I can specify which folder it should build to, so that any path information stored during it's last run will still be valid?

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  • HTML5 localStorage for assets (stylesheets, JavaScript, images etc)

    - by Sam
    To save both client download time and network usage, is it possible to use the localStorage feature of HTML5 to store contents of linked stylesheets, javascript files and binary data (e.g. images), rather than hitting the server each time? Would that just complicate things - since I assume you would have to add the linked asset via JavaScript rather than just a script or link element, breaking the page for those without JavaScript enabled)? Unless you can parse the content (using HEAD requested to check last modified date and other headers) before the browser downloads it. Or best just to stick with 304 Not Modified and eTag headers?

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  • Gedit adds line at end of page

    - by Sam
    The answer to this must be somewhere but I'm not finding it -- can anyone help me understand why in Gedit, if I have a page of code there is no extra trailing blank line, but then when I do a file comparison for my svn commit it shows an extra line being added at the end of the file? I have a feeling that Gedit is automatically adding an ending line break. But why, I have no idea...

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  • Class properties vs NSArray / NSDictionary

    - by Frank Martin
    I want a custom class object to hold data and have somehow the feeling that creating about 80 properties is not the best way of doing it. Most of the properties would be bool values, so i'm thinking about creating Arrays (keys / values) or (probably better) a NSDictionary attached to the object for holding the data. Does that make sense or should i stay with the properties? Extra: Are there general pros and cons for the different approaches? And what keywords / concepts do i have to search for to find discussions about that somehow general question? Thanks in advance

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  • Ruby on Rails in SpringSource tool suite?

    - by Martin Klosi
    I have been using Grails for some time now, but in school they are making us use Ruby on Rails. I have been trying to find an extension for ruby on rails for STS as there is for Grails, but I have failed. The only thing that comes close is a plugin so i can use ruby code in my Grails app using JRuby. I just want to make sure that a fully integrated extension DOESN'T exist. If that is the case, what would be the graphical IDE way of developing in ruby on rails, the same way one would use STS for Groovy on Grails development? (preferably free :) )

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  • Preserving NULL values in a Double Variable

    - by Sam
    Hi, I'm working on a vb.net application which imports from an Excel spreadsheet. If rdr.HasRows Then Do While rdr.Read() If rdr.GetValue(0).Equals(System.DBNull.Value) Then Return Nothing Else Return rdr.GetValue(0) End If Loop Else I was using string value to store the double values and when preparing the database statement I'd use this code: If (LastDayAverage = Nothing) Then command.Parameters.AddWithValue("@WF_LAST_DAY_TAG", System.DBNull.Value) Else command.Parameters.AddWithValue("@WF_LAST_DAY_TAG", Convert.ToDecimal(LastDayAverage)) End If I now have some data with quite a few decimal places and the data was put into the string variable in scientific notation, so this seems to be the wrong approach. It didn't seem right using the string variable to begin with. If I use a double or decimal type variable, the blank excel values come across as 0.0. How can I preserve the blank values? Thanks

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  • My MYSQL & PHP while code is out of memory, when there is only one row

    - by Sam
    Hey all, why is this code throwing an out of memory error, when there is only 1 row in the database.. $request_db = mysql_query("SELECT * FROM requests WHERE haveplayed='0'") or die(mysql_error()); $request = mysql_fetch_array( $request_db ); echo "<table border=\"1\" align=\"center\">"; while ( $request['haveplayed'] == "0" ) { echo "<tr><td>"; echo $request['SongName']; echo "</td><td>"; echo "<tr><td>"; echo $request['Artist']; echo "</td><td>"; echo "<tr><td>"; echo $request['DedicatedTo']; echo "</td><td>"; } echo "</table>"; Thanks.

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