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• Generate n-dimensional random numbers in Python

  - by Magsol

  I'm trying to generate random numbers from a gaussian distribution. Python has the very useful random.gauss() method, but this is only a one-dimensional random variable. How could I programmatically generate random numbers from this distribution in n-dimensions? For example, in two dimensions, the return value of this method is essentially distance from the mean, so I would still need (x,y) coordinates to determine an actual data point. I suppose I could generate two more random numbers, but I'm not sure how to set up the constraints. I appreciate any insights. Thanks!

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• referencing a WCF web service

  - by ErnieStings

  Our current project uses an asmx service. We want to keep this service for now, but would like to add an additional wcf service for ajax calls. I followed a procedure i found online to set up the service and it works fine with javascript in aspx files within that particular project but i'm unsure how to reference it in javascript files in a different project (in the same solution). If someone could point me in the right direction it would be much appreciated. Thanks, Shawn EDIT: i wish to make calls in javascript similar to the following: function Button1_onclick() { var service = new AjaxServices.TestService(); service.wcfTest(4, onSuccess, null, null); } function onSuccess(result){ document.getElementById("ajaxPlaceHolder").innerHTML = "<p>" + result + "</p>"; } // ]]> but i'm willing to explore the jQuery option as well.

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• NFS Server in Java

  - by dmeister

  I search an implementation of a network (or distributed) file system like NFS in Java. The goal is to extend it and do some research stuff with it. On the web I found some implementation e.g. DJ NFS, but the open question is how mature and fast they are. Can anyone purpose a good starting point, has anyone experience with such things? P.S. I know Hadoop DFS and I used it for some projects, but Hadoop is not a good fit for the things I want to do here. --EDIT-- Hadoop is really focused on highly scalable, high throughput computing without the possibilities to overwrite parts of a file and so an. The goal is you could use the filesystem e.g. for user home directories. --EDIT-- More Details: The idea is to modify such a implementation so that the files are not stored directly on a local filesystem, but to apply data de-duplication.

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• appending to cursor in oracle

  - by Omnipresent

  I asked a question yesterday which got answers but didnt answer the main point. I wanted to reduce amount of time it took to do a MINUS operation. Now, I'm thinking about doing MINUS operation in blocks of 5000, appending each iterations results to the cursor and finally returning the cursor. I have following: V_CNT NUMBER :=0; V_INTERVAL NUMBER := 5000; begin select count(1) into v_cnt from TABLE_1 while (v_cnt > 0) loop open cv_1 for SELECT A.HEAD,A.EFFECTIVE_DATE, FROM TABLE_1 A WHERE A.TYPE_OF_ACTION='6' AND A.EFFECTIVE_DATE >= ADD_MONTHS(SYSDATE,-15) AND A.ROWNUM <= V_INTERVAL MINUS SELECT B.head,B.EFFECTIVE_DATE, FROM TABLE_2 B AND B.ROWNUM <= V_INTERVAL V_CNT := V_CNT - V_INTERVAL; END LOOP; end; However, as you see...in each iteration the cursor is overwritten. How can I change the code so that in each iteration it appends to cv_1 cursor rather than overwriting?

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• How to generate a compiler error based on an attribute being missing in C#?

  - by RodH257

  I create a number of add-ins for the Revit Structure API. Each tool has to habe a class which implements the interface IExternalCommand. In the latest version of Revit, for your tool to work you need to have two attributes on the class that implements that interface: [Regeneration(RegenerationOption.Manual)] [Transaction(TransactionMode.Automatic)] The values in brackets can change, but there must be something there. Often I am finding myself forgetting to put the attributes on, then when it comes to runtime it crashes. Is there any way in Visual Studio 2010 to add a compiler warning or error saying that if your class implements that interface it must have those 2 attributes? I have resharper if that helps. Can anyone point me into the right direction?

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• Wrong assembly-references for Silverlight Sketchflow project in Blend 3

  - by persistent

  Hello, In my installation of Blend 3, the SketchStyles are missing when a new project is created. I found out that this is because the following automatic references in the project are wrong: Microsoft.Expression.Interactions Microsoft.Expression.Prototyping.Interactivity Microsoft.Expression.Prototyping.RunTime Microsoft.Expression.Prototyping.SketchControls In the project references these all point to my project path (where they don't live). If I remove them manually, and instead set the references to ie this: "c:\Program Files (x86)\Microsoft SDKs\Expression\Blend 3\Interactivity\Libraries\Silverlight\Microsoft.Expression.Interactions.dll" everything works. Any ideas on why, and how to fix this? Could it be the project template somehow? TIA

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• Is it a good idea to cache data from web services into a database?

  - by Thierry Lam

  Let's assume that Stackoverflow offers web services where you can retrieve all the questions asked by a specific user. A request to get all question from user A can result in the following json output: { { "question": "What is rest?", "date_created": "20/02/2010", "votes": 1, }, { "question": "Which database to use for ...", "date_created": "20/07/2009", "votes": 5, }, } If I want to manipulate and present the data in any ways that I want, will it be wise to dump it in a local database? At some point, I will also want to retrieve all answers for each question and store them in a local database. The workflow that I'm thinking is: User logs in. Web services retrieve all questions asked by the logged in user, dump them in a local database. User wants all answers for a specific question, another web service does the retrieval and dump them in a local database. After user logs out, delete from the local database all questions and answers from that user.

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• FMDB transaction

  - by user142764

  Hi ! I use FMDB to wrap SQLite in my app. I haven't found any docs about the use of methods begin, beginUpdates, commit, finalize, etc. I face some problems in my apps which i think are caused by the way i use transactions. Here is what i tried : [FMDB beginUpdates] - My insert statement - [FMDB commit] [FMDB finalize] it crashes with this log : Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[FMDatabase<0xd705a0 finalize]: called when collecting not enabled' Could you please give me an example of how you are using transactions, or point me to a doc ? Thanks in advance, Vincent.

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• XAMPP or MAMP on Mac OS X 10.6.2 (Snow Leopard)

  - by Steve

  I just bought a new MacBook Pro which comes with Snow Leopard 10.6.2 (Mac OS X 10.6.2). I am used to using XAMPP as my local development server on XP. Since Mac OS X is based on Unix, I was thinking on activating/installing all the necessary stuff as I would normally do on Linux. However, I am not quite ready to be playing around with the system at this point so having an external package would be a nice temporary solution I think. The question is whether I should go with MAMP or XAMPP. Does anybody have any suggestions? The Pro and Cons I suppose. As far as I know, Mac OS X comes with Apache2 and PHP5. Would MAMP or XAMPP modify the existing Apache and PHP installation? Any comments on how I should proceed? PS: Eventually I would use the default installation of Apache and PHP, and install a binary package of MySQL but time for development is an essence and I don't have time to familiarize myself with Mac OS X.

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• Ho to add dynamic table list to a Fullcalendar page

  - by Dave Burton

  I have implemented a Fullcalendar on a RoR page. I would like to add a list (index) below the calendar showing events for the day the user selects. Click on a day and that days events list below the calendar. I'd like it to be dynamic (don't reload the whole page). Please point me in the right direction to learn how to do this. I have a subscription to Railscast. But, I'm not sure what to look for. Thanks

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• Actionscript 3 Sprite AddChild

  - by Amy

  Im new to actionscript 3 and am a little confused about how the addchild function works. I want to draw 5 houses. each house has a roof and wall. Each wall has a door and a window. I have the following classes and this is how I grouped them class Main class House class Roof //a triangle class Wall //a rectangle class Door //a rectangle class Window //a square Im having trouble with inheritance of the classes. I cant made the wall class show up with a window and a door. Can someone point me to the right direction?

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• Selenium/NUnit run one test on multiple IP addresses.

  - by Matt Clarkson

  I have a test suite DLL written in C# that uses Selenium.This is then loaded into NUnit and tests can be performed on our embedded web server boards. Does anyone know how to run a NUnit Selenium test on multiple IPs in multiple browsers? I have tried creating multiple DefaultSelenium classes but they point to the same Internet Explorer window. I need multiple instances of the Selenium RC controlling individual Internet Explorer windows. Have been looking a lot on the Selenium User Group and in various documentation but can find a definitive answer. Cheers, Matt

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• Should methods containing LINQ expressions be tested / mocked?

  - by Phil.Wheeler

  Assuming I have a class with a method that takes a System.Linq.Expressions.Expression as a parameter, how much value is there in unit testing it? public void IEnumerable<T> Find(Expression expression) { return someCollection.Where(expression).ToList(); } Unit testing or mocking these sorts of methods has been a mind-frying experience for me and I'm now at the point where I have to wonder whether it's all just not worth it. How would I unit test this method using some arbitrary expression like List<Animal> = myAnimalRepository.Find(x => x.Species == "Cat");

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• How to create custom get and set methods for Linq2SQL object

  - by optician

  I have some objects which have been created automatically by linq2SQL. I would like to write some code which should be run whenever the properties on these objects are read or changed. Can I use typical get { //code } and set {//code } in my partial class file to add this functionality? Currently I get an error about this member already being defined. This all makes sense. Is it correct that I will have to create a method to function as the entry point for this functionality, as I cannot redefine the get and set methods for this property. I was hoping to just update the get and set, as this would mean I wouldn't have to change all the reference points in my app. But I think I may just have to update it everywhere.

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• Python Bitstream implementations

  - by Danielb

  I am writing a huffman implementation in Python as a learning exercise. I have got to the point of writing out my variable length huffman codes to a buffer (or file). Only to find there does not seem to be a bitstream class implemented by Python! I have had a look at the array and struct modules but they do not seem to do what I need without extra work. A bit of goggling turned up this bitstream implementation, which is more like what I am wanting. Is there really no comparable bitstream class in the Python standard library?

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• Copy one jagged array ontop of another.

  - by George Johnston

  How could I accomplish copying one jagged array to another? For instance, I have a 5x7 array of: 0, 0, 0, 0, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 and a 4x3 array of: 0,1,1,0 1,1,1,1 0,1,1,0 I would like to be able to specify a specific start point such as (1,1) on my all zero array, and copy my second array ontop of it so I would have a result such as: 0, 0, 0, 0, 0, 0, 0 0, 0, 1, 1, 0, 0, 0 0, 1, 1, 1, 1, 0, 0 0, 0, 1, 1, 0, 0, 0 0, 0, 0, 0, 0, 0, 0 What would be the best way to do this?

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• Gigantic Tabs in Eclipse on Ubuntu

  - by Zack

  Short version: How do I make a short version of Eclipse's tabs & toolbars in Ubuntu? I've been looking around for a fix to this on Google, but to no avail. With any GTK theme, I still have this same issue and it's very, very annoying--to the point where I've stopped using Eclipse in favor of gEdit. However, after running pylint from a terminal too. many. times. I've decided I need to find a solution to this issues with Eclipse so I can have PyDev back. Here's what the tabs look like: As you can see, not only are the tabs exaggerated, but the toolbar is, too: so is the toolbar on the bottom; so are the tabs in the bottom pane. Overall, it's eating up a lot of screen space, which is a hard item to come by on a 17" screen. Any suggestions/fixes?

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• How do I rotate an image in Javascript or CSS

  - by Eric

  I am creating a simple game. I want to use jQUERY to rotate the joints making it move. I am using .animate ( http://api.jquery.com/animate/ ) to animate CSS properties but if it is also possible to use Javscript, I can make my own custom code. More TO-THE-POINT How do I rotate images in CSS or Javascript? I prefer CSS but Javascript is fine too. If it is impossible (which I am pretty sure it is but I am not giving up yet) is there any other possible way to do what i am trying to do without making a bunch of seperate images, each rotated a different way. Or can anyone at least give me an example of a site that does something similar. EDIT: I need 1 CSS property (no -something: rotation(500deg);) that works with FireFox, Safari and Chrome because those are the only browsers I really work with.

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• Enclosing service execution in try-catch: bad practice?

  - by Sorin Comanescu

  Hi, Below is the usual Program.cs content for a windows service program: static class Program { /// <summary> /// The main entry point for the application. /// </summary> static void Main() { ServiceBase[] ServicesToRun; ServicesToRun = new ServiceBase[] { new MyService() }; ServiceBase.Run(ServicesToRun); } } Is it a bad practice to enclose the ServiceBase.Run(...) in a try-catch block? Thanks.

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• SetSel on EN_SETFOCUS or WM_SETFOCUS doesn't work

  - by Coder

  I've ran into next mystic thing in Winapi/MFC, I have an edit box, contents of which I have to select on Tab, Lclick, Rclick, Mclick and so on. The sort of obvious path is to handle the SETFOCUS message and call SetSel(0, -1), which should select all text. But it doesn't work! What's wrong? I tried googling, everyone seems to override Lclilks or handle SetSel in parent windows, but this is wrong from encapsulation point of view, also multiple clicks (user wants to insert something in the middle of the text) will break, and so on. Why isn't my approach working, I tried like 10 different ways, tried to trap all possible focus messages, looked up info on MSDN, but nothing works as expected. Also, I need to recreate the carret on focus, which also doesn't seem to work. SETFOCUS message gets trapped alright. If I add __asm int 3, it breaks every time. It's the create carret and setsel that gets swallowed it seems.

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• JMS have javax.jms.InvalidDestinationException when client stop working

  - by Tran

  I use JMS for sending requests from a client to a server. My client sends a request to the server. While the server is working with my request, my client stops (network problem) before the server finishes. When the server is finished, it'll return to the client, but the server can't see the client which sent the request to server, at which point, the server will return an exception in log file. The exception is : javax.jms.InvalidDestinationException: Cannot publish to a deleted Destination: temp-queue://ID:PC0092-49463-1344231871819-0:0:9 [^] My question is: what do I need to do in this case? Can I catch or disable this exception? And how can I do it? (Sorry, If my english is not good.)

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• How do I create a reusable WF sequential workflow?

  - by djgiard

  I have two customers that have the same workflow (Create file -transport file - wait for response - send response to internal team); however the implementation of each step is different for each customer. For example, one customer requires a flat file to be sent via SFTP, while the other customer requires an XML file to be sent via FTP. I'd like to create a sequential workflow, using Microsoft Workflow Foundation (WF) and reuse this workflow for multiple vendors. Each action's call to an external module can use the same interface, but a different concrete implementation. However, I'm unfamiliar with WF and I'm not sure how to implement this. Can someone point me to the proper way to use this pattern? Will it make a difference whether I choose WF 3.5 or WF 4.0? Thank you.

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• How to write a virtual conditional breakpoint in java

  - by Phuong Nguyen de ManCity fan

  I'm sorry if the question title may mis-inform you, but I cannot find a proper word to explain that. If you ever working with .NET, you would know that there is Assert class that will automatically wake up and attach debugger if necessary and then have debugger (Visual Studio) pausing at the Assert command, given the Assert command failed. Given I'm running a java program and having debugger connected, then how can I have debugger to break on certain condition without manually setup a break point? I'm expecting something like that: void doSomeThing(String x){ if (x==null) breakDebuggerNow(); }

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• How to make WordPress "Add/Edit Post" form more Tumblr like?

  - by Eliot Sykes

  Hi, WordPress requires you give each blog post at least two fields: a title and text body content. I'm wondering how to modify WordPress admin so I can sometimes enter a single field for a blog post, in particular a URL, without WordPress requiring a title (related but not the point of this question: a custom theme would then know how to handle a post that only contained a URL, it would treat it like a "Link" post in Tumblr). Ideally it'd be good if the "add/edit post" form could be modified so it only contains this single URL/Link field when this is wanted. I'm guessing this is possible through a plugin but I'm not certain. I'm hoping some smart WordPress devs are here to share and brainstorm ideas for how this could be done. Thanks in advance for any help, Eliot

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• How can I sort an NSTableColumn of NSStrings ignoring "The " and "A "?

  - by David Barry

  I've got a simple Core Data application that I'm working on to display my movie collection. I'm using an NSTableView, with it's columns bound to attributes of my Core Data store through an NSArrayController object. At this point the columns sort fine(for numeric values) when the column headers are clicked on. The issue I'm having is with the String sorting, they sort, however it's done in standard string fashion, with Uppercase letters preceding lowercase(i.e. Z before a). In addition to getting the case sorting to work properly, I would like to be able to ignore a prefix of "The " or "A " when sorting the strings. What is the best way to go about this in Objective-C/Cocoa?

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