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  • Migrating from VBA Excel 2003

    - by Diego Castro
    I have a series of big excel files that work like a program, but I hate beeing tied up (stuck in VBA for excel 2003), so... Whats the best way to implement a gui over a excel vba program (office 2003)? (are there any tools for that... I want to move away from the office suite, but still have it in the background) Or what's the easiest alternative for migrating this code to a more open language. Any ideias?

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  • many1 no longer works with Parsec 3.x

    - by Zak
    After updating to Parsec 3.1 from 2.x, code using many1, such as word = many1 letter fails with No instance for (Stream s m Char) arising from a use of `letter' I found a mailing list post claiming that adding {-#LANGUAGE NoMonomorphismRestriction #-} to the top of the source file would solve the problem, but it did not.

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  • indentation preference and personality

    - by dreftymac
    This question is similar in spirit to : http://stackoverflow.com/questions/492178/links-between-personality-types-and-language-technology-preferences But it is based specifically on indentation (spaces vs tabs and the number of spaces). The reason I am asking here instead of searching is because I remember seeing a specific document writing about this. If I remember correctly, it also talked about why Linus prefers eight spaces.

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  • Why did Dylan loose to Objective-C

    - by Adam Gent
    I have played/worked with many different programming languages and Dylan is still one of my favorites. My question is why did Dylan fail when Objective-C, Ruby and even Scheme have had more success? Was Dylans performance that much worse than Objective-C that Apple went with it or was purely for social/political reasons. Hopefully someone from apple will see this question :) BTW if you have no idea what Dylan is please google Dylan Progrmaming Language.

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  • jquery Ajax sortable list stops being sortable when Ajax call updates the list html

    - by Trevor
    Hi, I am using jquery 1.4.2 and trying to achieve the following: 1 - function call that sends a value to a php page to add/remove an item 2 - returns html list of the items 3 - list should still be sortable 4 - save (serialise list) onclick My full WIP is located here [http://www.chittak.co.uk/test4/index_nw3.php][1] I tried to delegate from the level above the UL but I could get this to work $("#construnctionstage").delegate('ul li', 'click', function(){ The initial list is sortable, when you click add/remove the ajax function returns a new list with the a number of items, BUT I am doing something wrong as the alert message continues to work while the list is no longer sortable. $(document).ready(function(){ $('ul').delegate('li', 'click', function(){ alert('You clicked on an li element!'); /*$("#test-list").sortable({ handle : '.handle', update : function () { var order = $('#test-list').sortable('serialize'); $("#info").load("process-sortable.php?"+order); } });*/ }).sortable({ handle : '.handle', update : function () { var order = $('#test-list').sortable('serialize'); $("#info").load("process-sortable.php?"+order); } }); }); <div id="construnctionstage"> <ul id="test-list"> <li id="listItem_1">

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  • Can't get any speedup from parallelizing Quicksort using Pthreads

    - by Murat Ayfer
    I'm using Pthreads to create a new tread for each partition after the list is split into the right and left halves (less than and greater than the pivot). I do this recursively until I reach the maximum number of allowed threads. When I use printfs to follow what goes on in the program, I clearly see that each thread is doing its delegated work in parallel. However using a single process is always the fastest. As soon as I try to use more threads, the time it takes to finish almost doubles, and keeps increasing with number of threads. I am allowed to use up to 16 processors on the server I am running it on. The algorithm goes like this: Split array into right and left by comparing the elements to the pivot. Start a new thread for the right and left, and wait until the threads join back. If there are more available threads, they can create more recursively. Each thread waits for its children to join. Everything makes sense to me, and sorting works perfectly well, but more threads makes it slow down immensely. I tried setting a minimum number of elements per partition for a thread to be started (e.g. 50000). I tried an approach where when a thread is done, it allows another thread to be started, which leads to hundreds of threads starting and finishing throughout. I think the overhead was way too much. So I got rid of that, and if a thread was done executing, no new thread was created. I got a little more speedup but still a lot slower than a single process. The code I used is below. http://pastebin.com/UaGsjcq2 Does anybody have any clue as to what I could be doing wrong?

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  • How to write a C program using the fork() system call that generates the Fibonacci sequence in the

    - by Ellen
    The problem I am having is that when say for instance the user enters 7, then the display shows: 0 11 2 3 5 8 13 21 child ends. I cannot seem to figure out how to fix the 11 and why is it displaying that many numbers in the sequence! Can anyone help? The number of the sequence will be provided in the command line. For example, if 5 is provided, the first five numbers in the Fibonacci sequence will be output by the child process. Because the parent and child processes have their own copies of the data, it will be necessary for the child to output the sequence. Have the parent invoke the wait() call to wait for the child process to complete before exiting the program. Perform necessary error checking to ensure that a non-negative number is passed on the command line. #include <stdio.h> #include <sys/types.h> #include <unistd.h> int main() { int a=0, b=1, n=a+b,i,ii; pid_t pid; printf("Enter the number of a Fibonacci Sequence:\n"); scanf("%d", &ii); if (ii < 0) printf("Please enter a non-negative integer!\n"); else { pid = fork(); if (pid == 0) { printf("Child is producing the Fibonacci Sequence...\n"); printf("%d %d",a,b); for (i=0;i<ii;i++) { n=a+b; printf("%d ", n); a=b; b=n; } printf("Child ends\n"); } else { printf("Parent is waiting for child to complete...\n"); wait(NULL); printf("Parent ends\n"); } } return 0; }

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  • Fastest way to calculate a 128-bit integer modulo a 64-bit integer

    - by Paul Baker
    I have a 128-bit unsigned integer A and a 64-bit unsigned integer B. What's the fastest way to calculate A % B - that is the (64-bit) remainder from dividing A by B? I'm looking to do this in either C or assembly language, but I need to target the 32-bit x86 platform. This unfortunately means that I cannot take advantage of compiler support for 128-bit integers, nor of the x64 architecture's ability to perform the required operation in a single instruction.

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  • Can't connect to SQL Server 2008 - looks like Shared Memory problem

    - by Proposition Joe
    I am unable to connect to my local instance of SQL Server 2008 Express using SQL Server Management Studio. I believe the problem is related to a change I made to the connection protocols. Before the error occurred, I had Shared Memory enabled and Named Pipes and TCP/IP disabled. I then enabled both Named Pipes and TCP/IP, and this is when I started experiencing the problem. When I try to connect to the server with SSMS (with either my SQL server sysadmin login or with windows authentication), I get the following error message: A connection was successfully established with the server, but then an error occurred during the login process. (provider: Named Pipes Provider, error: 0 - No process is on the other end of the pipe.) (Microsoft SQL Server, Error: 233) Why is it returning a Named Pipes error? Why would it not just use Shared Memory, as this has a higher priority order in the list of connection protocols? It seems like it is not listening on Shared Memory for some reason? When I set Named Pipes to enabled and try to connect, I get the same error message. My windows account is does not have administrator priviliges on my computer - perhaps this is making a difference in some way (as some of the discussions in this post about an "SuperSocketNetLib\Lpc" registry key seems to suggest).

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  • Looking for a good book on microprocessor internals

    - by David Holm
    I'm looking for a good book on how modern microprocessors are designed and work as I would like to increase my understanding of what makes them tick. Something that covers pipelines, superscalar architectures, caches etc. A book that is suitable for a programmer with several years of experience and has done and understands assembly programming and machine language, so basically not "CPUs for Dummies" or anything such. What books do people who design today's processors read for instance?

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  • Which HTML and CSS standards reached W3C Recommendation status?

    - by mxn 4000
    Could anyone please tell me which HTML/XHTML and CSS versions reached "Recommendation" (not "Candidate Recommendation") status? I tried to find the documents at http://www.w3.org/TR/tr-status-stds and they appear to be: 1) "XHTML™ 1.0 The Extensible HyperText Markup Language (Second Edition)" 2) "Cascading Style Sheets (CSS1) Level 1 Specification" Please correct me if I'm wrong. These are kinda neanderthal technologies...

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  • Unmanaged DLL in C# Web Service

    - by Telis
    Hi Guys, please help µe as I am new into accessing an unmanaged DLL from C#.. I have a large unmanaged DLL in C++ and I am trying to access the DLL's classes and functions from a C# Web Service. I have seen many examples how to use DLLImport, but for some reason I am stuck with my very first wrapper method spending many hours with no luck.. What should I do to return an object in my 'Marshaled' [DllImport..] function? I would like to do something like that: [DllImport("unmanaged.dll")] public static extern MyClass MyFunction(); Here is the definition of my C++ class and the function that I want to access: class __declspec(dllexport) TPDate { public: TPDate(); TPDate(const TPDate& rhs); ... //today's date. static TPDate AsOfDate(void); ... } In my Web service I have declared the following StructLayout: [StructLayout(LayoutKind.Sequential)] public class TPDate { public TPDate(TPDate d) { _tpDate = d; } public TPDate _tpDate; } and here's where I think that I'm not doing something right: class WrapperTPDate { [DllImport("TPTools.dll", ExactSpelling=false, EntryPoint = "?AsOfDate@TPDate@@SA?AV1@XZ", CallingConvention = CallingConvention.StdCall)] [return: MarshalAs(UnmanagedType.Struct)] **public static extern TPDate AsOfDate();**// HERE THERE IS PROBLEM }; I am calling the wrapper as follows from my WebMethod: [WebMethod] public void ConstructModel() { TPDate date1 = WrapperTPDate.AsOfDate();// Here I get exception TPDate date = new TPDate(date1); } The exception i am getting is: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Runtime.InteropServices.MarshalDirectiveException: Cannot marshal 'return value': Invalid managed/unmanaged type combination (this type must be paired with LPStruct or Interface). If I change it to LPSTRUCT, I am getting another exception: System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt Could you please tell me where I'm doing wrong here Thanks

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  • Open source alternative to MATLAB's fmincon function?

    - by dF
    Is there an open-source alternative to MATLAB's fmincon function for constrained linear optimization? I'm rewriting a MATLAB program to use Python / NumPy / SciPy and this is the only function I haven't found an equivalent to. A NumPy-based solution would be ideal, but any language will do.

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  • API to toggle "Show hidden files, folders and drives"

    - by dbkk
    Is there a function in Windows API to toggle the "Show hidden files, folders and drives" option in Windows Explorer (Tools Folder Options... View tab). I know of a related registry key, but changing that would not have immediate effect. The key is: HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Windows/CurrentVersion/Explorer/Advanced/Folder/Hidden/SHOWALL Trying to do this from C#, but the question is not language-specific.

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  • How do I debug a crash when I run my garbage-collected app in Rosetta?

    - by Rob Keniger
    I have a Universal app which is targeting 10.5 and which uses garbage collection. I am building for ppc, i386 and x86_64. I don't have access to a physical PowerPC machine so I am trying to use Rosetta to confirm that the PowerPC portion of the app works correctly. However, as soon as the app is launched in Rosetta it immediately crashes with the following crash log: Process: FooApp [91567] Path: /Users/rob/Development/src/FooApp/build/Release 64-bit/FooApp.app/Contents/MacOS/FooApp Identifier: com.companyX.FooApp Version: 0.9 (build d540e05) (2) Code Type: PPC (Translated) Parent Process: launchd [708] Date/Time: 2010-04-09 18:32:23.962 +1000 OS Version: Mac OS X 10.6.3 (10D573) Report Version: 6 Exception Type: EXC_CRASH (SIGTRAP) Exception Codes: 0x0000000000000000, 0x0000000000000000 Crashed Thread: 5 ...snip non-relevant threads... Thread 5 Crashed: 0 libSystem.B.dylib 0x8023656a __pthread_kill + 10 1 libSystem.B.dylib 0x80235e17 pthread_kill + 95 2 com.companyX.FooApp 0xb80bfb30 0xb8000000 + 785200 3 com.companyX.FooApp 0xb80c0037 0xb8000000 + 786487 4 com.companyX.FooApp 0xb80dd8e8 0xb8000000 + 907496 5 com.companyX.FooApp 0xb8145397 spin_lock_wrapper + 1791 6 com.companyX.FooApp 0xb801ceb7 0xb8000000 + 118455 I have used the Apple docs on debugging translated apps and the information on this page to attach gdb to the app when it's running in Rosetta. The app immediately breaks into the debugger upon launch: Program received signal SIGTRAP, Trace/breakpoint trap. [Switching to thread 15107] 0x9151fdd4 in auto_fatal () (gdb) bt #0 0x9151fdd4 in auto_fatal () #1 0x91536d84 in Auto::Thread::get_register_state () #2 0x915372f8 in Auto::Thread::scan_other_thread () #3 0x91529be4 in Auto::Zone::scan_registered_threads () #4 0x91539114 in Auto::MemoryScanner::scan_thread_ranges () #5 0x9153b000 in Auto::MemoryScanner::scan () #6 0x9153049c in Auto::Zone::collect () #7 0x915198f4 in auto_collect_internal () #8 0x9151a094 in auto_collection_work () #9 0x96687434 in _dispatch_call_block_and_release () #10 0x9668912c in _dispatch_queue_drain () #11 0x96689350 in _dispatch_queue_invoke () #12 0x966895c0 in _dispatch_worker_thread2 () #13 0x966896fc in _dispatch_worker_thread () #14 0x965a97e8 in _pthread_body () (gdb) I have no idea where to start with this. It looks like the Garbage Collector is failing very badly. Are garbage-collected PowerPC apps not supported in Rosetta? I can't see any mention of this limitation in the docs if so. Does anyone have any ideas?

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  • Hidden Features of JavaScript?

    - by Allain Lalonde
    What "Hidden Features" of JavaScript do you think every programmer should know? After having seen the excellent quality of the answers to the following questions I thought it was time to ask it for JavaScript. Hidden Features of C# Hidden Features of Java Hidden Features of ASP.NET Hidden Features of Python Hidden Features of HTML Hidden Features of PHP Even though JavaScript is arguably the most important Client Side language right now (just ask Google) it's surprising how little most web developers appreciate how powerful it really is.

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  • set Timeout before redirrect page in C#

    - by loviji
    Hello, How to implement timeout in this code: Response.Write(@"<script language='javascript'>alert('some alert');</script>"); Response.Redirect(Request.ApplicationPath); I want to show to user message, and after redirect. But in my solution operations occurs very fast, and alert is not shown. thanks

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  • Are there people using scheme out there?

    - by Nick
    Hey, I have just started to study computer sciences at the university where they teach us programming in scheme. Since i have learned c++ for the last 6 years, scheme appears a little odd to me. But they tell me you can write any program you can write in C or Java with it. Is anybody really using this language?

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  • C++ OpenSource project for beginner programmer?

    - by VeminZ
    I`m a beginner C++ programmer. And I want to pursue my career in system- and driver-programming. Can you suggest me an opensource projects to I improve my skills in low-level development? I am looking for a project with the following characteristic: - on C\C++ language based - a small project with a small amount of code, yet - UNIX-based systems designed Do you know that something like this?

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  • catching a deadlock in a simple odd-even sending

    - by user562264
    I'm trying to solve a simple problem with MPI, my implementation is MPICH2 and my code is in fortran. I have used the blocking send and receive, the idea is so simple but when I run it it crashes!!! I have absolutely no idea what is wrong? can anyone make quote on this issue please? there is a piece of the code: integer,parameter::IM=100,JM=100 REAL,ALLOCATABLE ::T(:,:),TF(:,:) CALL MPI_COMM_RANK(MPI_COMM_WORLD,RNK,IERR) CALL MPI_COMM_SIZE(MPI_COMM_WORLD,SIZ,IERR) prv = rnk-1 nxt = rnk+1 LIM = INT(IM/SIZ) IF (rnk==0) THEN ALLOCATE(TF(IM,JM)) prv = MPI_PROC_NULL ELSEIF(rnk==siz-1) THEN NXT = MPI_PROC_NULL LIM = LIM+MOD(IM,SIZ) END IF IF (MOD(RNK,2)==0) THEN CALL MPI_SEND(T(2,:),JM+2,MPI_REAL,PRV,10,MPI_COMM_WORLD,IERR) CALL MPI_RECV(T(1,:),JM+2,MPI_REAL,PRV,20,MPI_COMM_WORLD,STAT,IERR) ELSE CALL MPI_RECV(T(LIM+2,:),JM+2,MPI_REAL,NXT,10,MPI_COMM_WORLD,STAT,IERR) CALL MPI_SEND(T(LIM+1,:),JM+2,MPI_REAL,NXT,20,MPI_COMM_WORLD,IERR) END IF as I understood even processes are not receiving anything while the odd ones finish sending successfully, in some cases when I added some print to observe what is going on I saw that the variable NXT is changing during the sending procedure!!! for example all the odd process was sending message to process 0 not their next one!

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  • jQuery .load() XHTML issue

    - by Urfe
    I am having some strange problems loading content from another XHTML page via jQuery. When the second page I try to load from is served as XHTML I get the below error. I don't know if it helps but both documents validate when I get the error. Uncaught Error: NO_MODIFICATION_ALLOWED_ERR: DOM Exception 7 Currently the header on the second page I load from is: <?xml version="1.0" encoding="iso-8859-1" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <meta name="language" content="en" /> <title>some title</title> <!-- CSS & Javascript included here --> </head> The content type is set as: application/xhtml+xml;charset=iso-8859-1 Interestingly, when I remove all the XHTML stuff from the header and stop setting the content type the error does not occur and everything works great. The load process currently looks like the below. It works fine when everything is plain HTML. $('#overpage').find(".wrap").load(this.getTrigger().attr("href")+" #op").show(); I'm curious why the process only does not work when the second page I load from is XHTML. I don't want to serve the page as just plain HTML and am looking for advice on what I am doing wrong. Both pages validate and I'm really scratching my head here. Many thanks!

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  • violation of primary key constraint .Cannot insert duplicate key in object using ADO

    - by CREFLY
    Hi All we are working on a users apllication using Access2003(VBA) as software language and SQL Server 2005 as database. We are using ADO method and we encounter a problem. when users create new record in a ADO Screen and they want to save the record after implementing it they receive this error : error -2147217873 violation of primary key constraint 'PK_ '.Cannot insert duplicate key in object 'Pk_...' Any help will be appreciated Thanks in advance

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