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  • Can't connect twice to linked table using ACE/JET driver

    - by Tmdean
    I'm trying to connect to an MS Access database linked table in VBScript. It works fine connecting the first time on one connection but if I close that connection and open a new one in the same script it gives me an error. test.vbs(13, 1) Microsoft Office Access Database Engine: ODBC--connection to '{Oracle in OraClient10g_home1}DB_NAME' failed. This is some code that triggers the error. TABLE_1 is an ODBC linked table in the test.mdb file. Dim cnn, rs Set cnn = CreateObject("ADODB.Connection") cnn.Open "Provider=Microsoft.ACE.OLEDB.12.0;Data source=test.mdb" Set rs = cnn.Execute("SELECT * FROM [TABLE_1]") rs.Close cnn.Close Set cnn = CreateObject("ADODB.Connection") cnn.Open "Provider=Microsoft.ACE.OLEDB.12.0;Data source=test.mdb" Set rs = cnn.Execute("SELECT * FROM [TABLE_1]") '' crashes here rs.Close cnn.Close This error does not occur if I try to access an ordinary Access table. Right now I'm thinking it's a bug in the Oracle ODBC driver.

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  • Filtering at server or at client?

    - by ablmf
    I am thinking about how to build advertise site which works like twitter. That means, most user don't not visit the site by browser, they should run a dedicated client application on their PC or smart phone. Then they set some filters about what kind of advertise they like. And when new post that fulfill their needs appear, the client will make a notification. To make that client as real time as possible, it has to poll the server within a short time interval. The problem is, should I do the filtering at the server side when client polls, or should I simply transfer all new posts to client and let client do the filtering? Making server side filtering might cause too much CPU cycles of server, but transferring every post blindly to client might waste a lot of bandwidth. Just a brain game. :)

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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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  • Do you know a good and efficient FFT?

    - by yan bellavance
    Hi, I am trying to find a very fast and efficient Fourier transform (FFT). Does anyone know of any good ones. I need to run it on the iPhone so it must not be intensive. Instead, maybe you know of one that is wavelet like, i need frequency resolution but only a narrow band (vocal audio range up to 10khz max...even 10Khz might be too high). Im thinking also of truncating this FFT to keep the frequency resolution while eliminating the unwanted frequency band. This is for an iphone ...I have taken a look at the FFT in Aurio touch but it seems this is an int FFT but my app uses floats.....would it give a big performance increase to try and adapt program to an int FFT or not(which i really dont feel like doing...plus aurio touch uses a radix 2 FFT which is not that great).

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  • Using OpenGL drawing operations in an object-oriented setting?

    - by Lion Kabob
    I've been plowing through basic shaders and whatnot for an application I'm writing, and I've been having trouble figuring out a high-level organization for the drawing calls. I'm thinking of having a singleton class which implements a number of basic drawing operations, taking data from "user" classes and passing that to the appropriate opengl calls. I'm wondering how people do this when writing their own applications, as the internet is chock full of basic "Your first shader" tutorials, but very little on suggested organization of drawing code. My particular environment is targeted at iPad/OpenGL ES 2.0, but I think the question stands for most environments.

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  • WCF over named pipes

    - by Christoph
    Hi I have a problem with following scenario: There is a windows service running which spawns several processes. These processes open a WCF service host over a named pipe binding. Now the parent windows service tries to ping (connect) to the child processes using the wcf proxy over the well known named pipe. This, however fails saying: "Endpoint not found" If I run the parent process as a console application it works fine. Any ideas? I was thinking about permissions but the child processes should inherit the permission of the service, besides they are in the same session as well. thanks, Christoph

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  • WCF method that updates object passed in

    - by Georgia Brown
    Am I correct in thinking that if I have a WCF OperationContract takes in an object and needs to set a property on that object so the client gets the update, I need to declare it to return the object. e.g. given a datacontract: [DataContract] public class CompositeType { [DataMember] public int Key { get; set; } [DataMember] public string Something { get; set; } } this will not work with WCF: public void GetDataUsingDataContract(CompositeType composite) { composite.Key = 42; } this will work: public CompositeType GetDataUsingDataContract(CompositeType composite) { composite.Key = 42; return new CompositeType { Key = composite.Key, Something = composite.Something }; }

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  • Algorithm: efficient way to remove duplicate integers from an array

    - by ejel
    I got this problem from an interview with Microsoft. Given an array of random integers, write an algorithm in C that removes duplicated numbers and return the unique numbers in the original array. E.g Input: {4, 8, 4, 1, 1, 2, 9} Output: {4, 8, 1, 2, 9, ?, ?} One caveat is that the expected algorithm should not required the array to be sorted first. And when an element has been removed, the following elements must be shifted forward as well. Anyway, value of elements at the tail of the array where elements were shifted forward are negligible. Update: The result must be returned in the original array and helper data structure (e.g. hashtable) should not be used. However, I guess order preservation is not necessary. Update2: For those who wonder why these impractical constraints, this was an interview question and all these constraints are discussed during the thinking process to see how I can come up with different ideas.

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  • Combine 2 apps into one DB?

    - by coffeeaddict
    I'm debating whether to use the same DB for both my blog and my wiki. Since both are open source, and both install the required tables which is a very small number of tables for both apps, I'm thinking about just using one database to represent both sets of tables. Is this common and safe to do? I am hesitant because I always create a new DB for every application I create or use. But in this case, I don't want to spend another $10 a month from my shared hosting just to get another SQL 2008 DB to host a wiki..it's small and I'm the only one using the wiki. I just want to point the wiki to my existing blog DB that's already running and have the wiki wizard auto gen the tables to that DB and just hold both sets of tables there.

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  • Cropping an image, saving output to a new file and get crop coordinates

    - by synic
    I'm interfacing with a service that allows you to upload an image, and also upload coordinates of a thumbnail of that image. I'm thinking that (if there isn't some sort of prefab Activity specifically for this) that I can use Android's crop utility. The only problem is that I can't overwrite the original file, the crop window needs to have a custom message (instead of "crop image"), and I'll need the coordinates of the crop. Is this possible? Is there another way to do this without writing my own Activity?

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  • EJB 3 Session Bean Design for Simple CRUD

    - by sdoca
    I am writing an application that's sole purpose in life is to do CRUD operations for maintaining records in database. There are relationships between some of the tables/entities. Most examples I've seen for creating session beans deals with complex business logic/operations that interact with many entities which I don't have. Since my application is so very basic, what would be the best design for the session bean(s)? I was thinking of having one session bean per entity which had CRUD the methods defined. Then I thought of combining all of those session beans into a single session bean. And then I found this blog entry which is intriguing, but I must admit I don't understand all of it (what is a ServiceFacade?). I'm leaning towards session bean/entity class, but would like to hear more experienced opinions. Thanks.

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  • How to cause AggregateException with TPL?

    - by Sly
    I'm trying to recreate the conditions that will cause this exception: System.AggregateException: A Task's exception(s) were not observed either by Waiting on the Task or accessing its Exception property. As a result, the unobserved exception was rethrown by the finalizer thread.` I wrote this program thinking I'd cause the exception but it does not: using System; using System.Threading.Tasks; namespace SomeAsyncStuff { class Program { static void Main(string[] args) { Task.Factory.StartNew(() => { throw new NullReferenceException("ex"); }); GC.Collect(); Console.WriteLine("completed"); } } } In my real application, I use TPL and I did not code my exception handling right. As a result I get that exception. Now I'm trying to recreate the same conditions in a separate program to experiment with unobserved exceptions.

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  • Copying data across tabs

    - by Guillermo
    Hello, I got two different forms in two different tabs. One has data from our system and the other one is an interface of another, external, system in wich we need to copy data into (XML or API integration not an option here) The this is that, having open both forms - in two different tabs - i need a greasemonkey script or something similar that allows my to copy data from one form to the other (using the getValue method in Javascript). The problem right now is that I cannot figure out how to reference with a greasemonkey script one particular tab or window (to rad data from or write data to). Do you think it would be possible to do what I'm thinking to do? THANKS

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  • what do I need to start developing in .NET

    - by Mahew
    Hi All, thanks in advance for your time, Over the last year I have moved from a beginner PHP developer to a more intermediate developer, I use Mac OS X and a local development server environment (MAMP). I am thinking about starting to develop using the .NET framework. Can anyone give me some advice? What do I need to begin? How similar is .NET to PHP? What is the relationship between ASP and .NET? Is there anything novel or vital I should know about developing in .NET? (I know .NET is written using microsoft technologies...) Anything of use would be valuable! Cheers!

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  • Experience with laptop Keyboards?

    - by Omar Kooheji
    I'm thinking of retiring my 3 year old HP laptop I want to know which manufacturor makes laptops with the best Keyboards? I loved my Full width keyboard, with numberic pad on my HP, I've tried a a few laptop keyboards in shops and have found none of them satisfying to type with. What I want is something that will maximise my typing comfort. All the ones I see in shops seem to be designed to look good but feel horible. The keys are either too shiny, too small, or don't press down enough. All I want it a keyboard thats comfortable, I've been given a Lenovo laptop by my work and I've had to resort to pluging in a USB keyboard while I work, which is less than ideal.

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  • Multi-level clones with Git?

    - by Chad Johnson
    So, I'm thinking of having the following centralized setup with Git (each of these are clones): stable development developer1 developer2 developer3 So, I created my stable repository git --bare init made the 'development' clone git clone ssh://host.name//path/to/stable/project.git development and made a 'developer' clone git clone ssh://host.name//path/to/development/project.git developer So, now, I make a change, commit, and then I push from my developer account git commit --all git push and the change goes to the development clone. But now, when I ssh to the server, go to the development clone directory, and run "git fetch" or "get pull", I don't see the changes. So what do I do? Am I totally misunderstanding things and doing things wrong? How can I see the changes in the 'development' clone that I pushed from my 'developer' clone? This worked fine in Mercurial.

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  • WPF - 'Relational' Data in XAML Using DataContext

    - by Andy T
    Hi, Say I have a list of Employee IDs from one data source and a separate data source with a list of Employees, with their ID, Surname, FirstName, etc. Is it possible in XAML only to get the Employee's name from the second data source and display it next to the ID, using something like this (with the syntax corrected)?.. <TextBlock x:Name="EmployeeID" Text="{Binding ID}"></TextBlock> <TextBlock Grid.Column="1" DataContext="{StaticResource EmployeeList[**where ID = {Binding ID}**]}" Text="{Binding Surname}"/> I'm thinking back to my days using XML and XSLT with XPath to achieve the kind of thing shown above. Is this kind of thing possible in XAML? Or do I need to 'denormalize' the data first in code, into one consolidated list? It seems like it should be possible to do this simple task using XAML only, but I can't quite get my head around how you would switch the DataContext correctly and what the syntax would be to achieve this. Is it possible, or am I barking up the wrong tree? Thanks, AT

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  • LINQ to Objects .Distinct() not pulling distinct objects

    - by Anthony Potts
    I have two ways that I am doing a fuzzy search for a customer. One is by an abbreviated name and the other is by the customers full name. When I take these two and then union them together (which I have read several places should remove distinct values) I get duplicates. Thinking that all I need to do is then call the .Distinct() method on this I also still get Duplicates. Do I need to implement some compare functionality in my customer object? My code: Dim shortNameMatch As List(Of ICustomer) = CustomerLibrary.GetCustomersByShortName(term) Dim custNameMatch As List(Of ICustomer) = CustomerLibrary.GetCustomersByCustName(term) Dim allMatch = (From a In (From s In shortNameMatch Select s).Union(From c In custNameMatch Select c) Select a).Distinct()

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  • Only perform jquery effects/operations on certain pages

    - by Galen
    Up until now i've been dropping all my jquery code right inside the document.ready function. I'm thinking that for certain situations this isnt the best way to go. for example: If i want an animation to perform when a certain page loads what is the best way to go about that. $(document).ready(function() { $("#element_1").fadeIn(); $("#element_2").delay('100').fadeIn(); $("#element_3").delay('200').fadeIn(); }); If this is right inside of document.ready then every time ANY page loads it's going to check each line and look for that element. What is the best way to tell jquery to only perform a chunk of code on a certain page to avoid this issue.

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  • Which metadata I should save when downloading web-pages?

    - by Vojtech R.
    Hi, I'm going to download (for future purposes of language processing) some thousands webpages. Now I'm thinking, which metadata I should save. I explore this, but I do not wont to neglect something important. <title> <link> <publish_date> <date_downloaded> <source> // to this page <keyword> // for Solr indexing <text> // cleaned body of page Is there something important what I could miss in future?

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  • Are there such things as summer jobs for teenage programmers?

    - by Gbps
    I've taken programming as a hobby, studying it since I was 10 or so. 7 years to date, I've become progressivly good at C++, PHP, C#, Assembly, Lua, and the web languages such as HTML and CSS. Though I've never taken a class, I've been able to complete most, if not all of the questions from different "Programmer Interview Questions" articles and have participated in some small scale projects in the past. Summer starting yesterday for me, I've been thinking about how to keep busy while maybe earning some money along the way. Now, some kids mow lawns, others get fast food jobs, but what about programming jobs? Is there even such a thing?

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  • What are the Worst Software Project Failures Ever?

    - by Warren P
    Is there a good list of "worst software project failures ever" in the history of software development? For example in Canada a "gun registry" project spent around two billion dollars. (http://en.wikipedia.org/wiki/Gun_registry). This is of course, insane, even if the final product "sort of worked". I have heard of an FBI Case file system which there have been several attempts to rewrite, all of them so far, failures. There is a book on the subject (Software Runaways). There doesn't seem to be be a software "boondoggle" list or "fiasco" list on Wikipedia that I can see. (Update: Therac-25 would be the 'winner' of this question, except that I was internally thinking more of Software projects that had as their deliverable, mainly software, as opposed to firmware projects like Therac-25, where the hardware and firmware together are capable of killing people. In terms of pure software monetary debacles, which was my intended question, there are several contenders.)

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  • activemq round robin between queues or topics

    - by forkit
    I'm trying to achieve load balancing between different types of messages. I would not know in advance what the messages coming in might be until they hit the queue. I know I can try resequencing the messages, but I was thinking that maybe if there was a way to have the various consumers round robin between either queues or between topics, this would solve my problem. The main problem i'm trying to solve is that I have many services sending messages to one queue with many consumers feeding off one queue. I do not want one type of service monopolizing the entire worker cluster. Again I don't know in advance what the messages that are going to hit the queue are going to be. To try to clearly repeat my question: Is there a way to tell the consumers to round robin between either existing queues or topics? Thank you in advance.

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  • What are the pros and cons of using an in memeory DB rather than a ThreadLocal

    - by Pangea
    we have been using ThreadLocal so far to carry some data so as to not clutter the API. However below are some of issues of using thread local that which I dont like 1) over the years the data items being carried in thread local has increased 2) Since we started using threads (for some light weight processing), we have also migrating these data to the threads in the pool and copying them back again I am thinking of using an in memory DB for these (we doesnt want to add this to the API). I wondering if this approach is good. What r the pros and cons. thx in advance.

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  • XML/XHTML replace content?

    - by Daveo
    I have a XHTML string I want to replace tags in for example <span tag="x">FOO</span> <span tag="y"> <b>bar</b> some random text <span>another span</span> </span> I want to be able to find tag="x" and replace FOO with my own content and find tag=y and replace all the inner content with by own content. What is the best way to do this? I am thinking regex is definitely out of the question. Can XPATH do this or is that just for searching can it do manipulation?

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