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  • How to combine "|" character in run () command in powerbuilder in order to read an txt file as metad

    - by sgian76
    Could you please tell me how to use "pdftk mypdf.pdf dump data | findstr NumberOfPages in powerbuilder run command and save this metadata in a file by using the following code like this: string ls_runinput, ls_outputfile ls_outputfile = "c:\test.exe" ls_runinput = "c:\pdftk\pdftk.exe mypdf.pdf dump_data | findstr NumberOfPages >"+ls_outputfile Run(ls_runinput,Minimized!) li_fileopen = FileOpen(ls_outputfile ,TextMode!, Read!, Shared!) The problem is that Run command is executed, the file is created, but fileopen return -1 ? Is it maybe that run cannot recognize the "|" character? What should you propose me to write the right code? Iam using powerbuilder 10.5.2 , Thanks very much in advance

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  • is there such a thing as xsl:fo reporting or xsl:fo simulation?

    - by topmulch
    Hi, I am trying to determine if MY xsl:fo generated PDF file will exceed one page or not, without actually generating the output. We use Apache-FOP 0.95 on our server, and the XML data is being generated using a PHP DOMDocument class before being passed onto an XSL-FO template. My question: Are there PHP libraries out there that can simulate xsl:fo output and send me reports that I can use in my application? Alternatively, is there a way for the Apache FOP itself (or sibling Java app) that sends reports without actually generating a file? I have been reading the FOP documentation, and aside from some things I can not fully understand, I have not been able to find a way to do that from within FOP. Any advice is much appreciated.

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  • Injecting EntityManager Vs. EntityManagerFactory

    - by SB
    A long question, please bear with me. We are using Spring+JPA for a web application. My team is debating over injecting EntityManagerFactory in the GenericDAO(a DAO based on Generics something on the lines provided by APPFUSE, we do not use JpaDaosupport for some reason) over injecting an EntityManager. We are using "application managed persistence". The arguments against injecting a EntityManagerFactory is that its too heavy and so is not required, the EntityManager does what we need. Also, as Spring would create a new instance of a DAO for every web request(I doubt this) there are not going to be any concurrency issues as in the same EntityManager instance is shared by two threads. The argument for injecting EFM is that its a good practice over all its always good to have a handle to a factory. I am not sure which is the best approach, can someone please enlighten me? SB

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  • What's the performance penalty of weak_ptr?

    - by Kornel Kisielewicz
    I'm currently designing a object structure for a game, and the most natural organization in my case became a tree. Being a great fan of smart pointers I use shared_ptr's exclusively. However, in this case, the children in the tree will need access to it's parent (example -- beings on map need to be able to access map data -- ergo the data of their parents. The direction of owning is of course that a map owns it's beings, so holds shared pointers to them. To access the map data from within a being we however need a pointer to the parent -- the smart pointer way is to use a reference, ergo a weak_ptr. However, I once read that locking a weak_ptr is a expensive operation -- maybe that's not true anymore -- but considering that the weak_ptr will be locked very often, I'm concerned that this design is doomed with poor performance. Hence the question: What is the performance penalty of locking a weak_ptr? How significant is it?

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  • Google App Engine - Is this just a fluke, or could changing the version of an app improve cold-start

    - by Spines
    Here is the situation: I had an app with a cold start time of about 4 seconds. I was trying to improve the cold start time by removing a bunch of libraries and code I didn't really need. After doing that the cold start time was about 3 seconds latency, and 3 seconds CPU time used. I changed the version number in appengine-web.xml, and nothing else. And now I have two versions of my app that have the exact same code, up and running. For cold starts, the newer version uses 1800ms to 1900ms in CPU time, and has 1800ms to 2300ms in latency. For cold starts, the older version uses 2800ms to 3000ms in CPU time, and has 2300ms to 3600ms in latency. So far I have sampled 4 cold starts for each version.

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  • Delphi - online technical tests

    - by RBA
    I have searched for some online Delphi programming tests, and except the small test for Delphi certification and several tests on Delphi.about.com I did find nothing. Any ideas where I can find some Delphi online tests? LE: defining online Delphi programming tests: - technical questions about Delphi fundamentals,Data types,classes, libraries, generics, database concepts, etc. Examples here (Delphi Developer Certification Exam Study Guide) and here. LE2: tests to take after you have read all the articles from this question: Questions every good Delphi developer should be able to answer?

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  • How can I asynchronously monitor a file in Perl?

    - by Hussain
    I am wondering if it is possible, and if so how, one could create a perl script that constantly monitors a file/db, and then call a subroutine to perform text processing if the file is changed. I'm pretty sure this would be possible using sockets, but this needs to be used for a webchat application on a site running on a shared host, and I'm not so sure sockets would be allowed on it. The basic idea is: create a listener for a chat file/database when the file is updated with a new message, call a subroutine the called subroutine will send the new message back to the browser to be displayed Thanks in advance.

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  • Concerns with SoapUI Pro when Updating Web Services

    - by Plenoge
    This may unfortunately be a very open-ended question, but a coworker of mine has shared concerns about using SoapUI Pro as our automated regression testing tool primarily on the basis that seemingly trivial WSDL changes can cause headaches for the QA crew. My coworker's particularly concerned that if we update the WSDL, even with a name change, we'll need to touch and update each existing test. As I understand it SoapUI Pro offers a refactoring tool to handle this for you. What are your experiences with SoapUI Pro and updating your web services? Am I missing something?

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  • Explain DLL Dependencies to a lay person

    - by wheaties
    This follows from a previous posting I made about lack of a clean test machine for software installations. I'm doing a bad job of explaining how DLL dependencies work and how some machines might not have the right libraries at the time of installation. The problem is that it's being viewed as a defect with the build process. I'm trying to educate the higher ups that it's not the build process per se but rather the installation process which is to blame. Here's a quote from my boss relating subcontractor work to our work to put it into perspective: I'm not a software person. All I see is that when they hand something to us it just works but when we hand something to the client there's all sorts of problems. There must be something wrong with how you're building the code. It's very easy to see how someone who is smart (scarily smart) could come to the wrong conclusion. So how would you explain the whole DLL dependency issue?

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  • Best OpenID library for Java

    - by Adam Crume
    I want users to be able to log into my website with OpenID, but I don't know which library to use. I know which ones are out there, but I would like to know which one would be best. I'm running JOnAS, but no web framework (no Spring, Struts, GWT, etc.). (Please don't chastise me for not using a web framework. I have my reasons.) For what it's worth, my web site is broken into multiple WARs, and I would prefer something that works well in that situation, but that's not a big deal. Does anyone have experience with the different libraries? Any experiences or wisdom you can share?

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  • Incompatible classes when loading SWF

    - by Bart van Heukelom
    I have two ActionScript 3 projects, game(.swf) and minigame(.swf). At runtime the main game loads the minigame via Loader. I also have a shared library (SWC) of event classes, included by both, which minigame will need to dispatch and game will need to listen to. First: Is this possible this way? Second: What will happen if I compile the minigame, then change the event classes so they're incompatible, then compile the main game. Will Flash crash when trying to load the minigame SWF? (I hope so) Third: And what will happen if I change the event classes, but in a way that preserves interface-level compatibility?

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  • Why use hashing to create pathnames for large collections of files?

    - by Stephen
    Hi, I noticed a number of cases where an application or database stored collections of files/blobs using a has to determine the path and filename. I believe the intended outcome is a situation where the path never gets too deep, or the folders ever get too full - too many files (or folders) in a folder making for slower access. EDIT: Examples are often Digital libraries or repositories, though the simplest example I can think of (that can be installed in about 30s) is the Zotero document/citation database. Why do this? EDIT: thanks Mat for the answer - does this technique of using a hash to create a file path have a name? Is it a pattern? I'd like to read more, but have failed to find anything in the ACM Digital Library

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  • ASP.NET MVC Routes Login/Logout Problem

    - by Tom
    Hi Guys, Relatively new to ASP.NET MVC and little confused about how to do routing. My problem basically relates to "logged in" and "logged out routes" and having both as "/". i.e. I have home/index for logged out user which appears as "/" but this has got me confused as to how I can have home/home for logged in user and still have "/". I keep getting 127.0.0.1/home/home I could modify like 127.0.0.1/home - but I want it like "/". My confusion relates to the fact that the "/" [127.0.0.1/] is bound in the routes collection to home/index. Does anyone know how I can modify the routes dictionary (which will be binded ONCE at the start) so that the "/" can be shared for logged and non-logged users ? Thanks?

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  • Time order of messages

    - by Aiden Bell
    Read (skimmed enough to get coding) through Erlang Programming and Programming Erlang. One question, which is as simple as it sounds: If you have a process Pid1 on machine m1 and a billion million messages are sent to Pid1, are messages handled in parallel by that process (I get the impression no) and(answered below) is there any guarantee of order when processing messages? ie. Received in order sent? If so, how is clock skew handled in high traffic situations for ordering? Coming from the whole C/Thread pools/Shared State background ... I want to get this concrete. I understand distributing an application, but want to ensure the 'raw bones' are what I expect before building processes and distributing workload. Also, am I right in thinking the whole world is currently flicking through Erlang texts ;)

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  • Advantage to parsing Excel Spreadsheet data vs. CSV?

    - by john
    I have tabulated data in an Excel spreadsheet (file size will likely never be larger than 1 mb). I want to use PHP to parse the data and insert in to a MySQL database. Is there any advantage to keeping the file as an .xls/.xlsx and parsing it using a PHP Excel Parsing Library? If so, what are some good libraries to use? Obviuously, I can save the .xls/.xlsx as a CSV and handle the file that way. Thanks!

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  • libxml2 install error: command 'gcc' failed with exit status 1? What are the dependencies of libxml2

    - by SIA
    Hi everybody!! I am trying to install libxml2 on unbuntu 9.10 and getting errors: $ sudo python setup.py develop Its a very lengthy error message but the last error is Setup script exited with error: Command 'gcc' failed with exit status 1. Can anybody tell me why i am getting this error? What are the dependencies or libraries required to install this? scenario: I am trying to setup the reddit.com clone, and when i run develop command, its generating a huge error as stated above. Please help!! Thanks in advance And my many thanks to Stackoverflow team for having such a life saving site.

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  • ASP.NET Thread Safety in aspx.cs code behind file

    - by Tim Michalski
    I am thinking of adding a DataContext as a member variable to my aspx.cs code-behind class for executing LinqToSql queries. Is this thread safe? I am not sure if a new instance of this code-behind class is created for each HTTP request, or if the instance is shared amongst all request threads? My fear is that I will get 10 simultaneous concurrent http requests that will be using the same database session. public partial class MyPage : System.Web.UI.Page { private DataContext myDB = new DataContext(); protected void MyAction_Click(object sender, EventArgs e) { myDB.DoWork(); } }

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  • MySQL Conventions?

    - by Moe
    Hi There, I just moved my website to a new server (Shared to VPS) I expected errors, and the only error that is really puzzling me is this SQL statement. echo mysql_query("SELECT COUNT(*) FROM users_online_now") This returns nothing! And if I try the mysql_num_rows, it returns mysql_num_rows(): supplied argument is not a valid MySQL result resource.. If I query another table though eg: echo mysql_query("SELECT COUNT(*) FROM users") It works fine. I'm guessing it's something to do with the naming of the table? It worked fine on my previous host, is there some setting I should modify?

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  • Task vs. process, is there really any difference?

    - by DASKAjA
    Hi there, I'm studying for my final exams in my CS major on the subject distributed systems and operating systems. I'm in the need for a good definition for the terms task, process and threads. So far I'm confident that a process is the representation of running (or suspended, but initiated) program with its own memory, program counter, registers, stack, etc (process control block). Processes can run threads which share memory, so that communication via shared memory is possible in contrast to processes which have to communicate via IPC. But what's the difference between tasks and process. I often read that they're interchangable and that the term task isn't used anymore. Is that really true?

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  • SharePoint Documents Library - Change "Document Created By" field

    - by yellowblood
    Hello, I have a code that changes the username in various SharePoint lists, mostly by the "Author" column. It all works fine on normal lists, but it doesn't seem to work on the "Shared Documents" list which is a document library. Whether I change the username in "Created By" or "Document Created By", the change doesn't seem to take effect. The item.Update command doesn't throw any exception, but it clearly doesn't update the field(s). What can I do if I want to change this field through code? Thanks

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  • Branching logic in an MVC view

    - by Alex Kilpatrick
    I find myself writing a lot of code in my views that looks like the code below. In this case, I want to add some explanatory HTML for a novice, and different HTML for an expert user. <% if (ViewData["novice"] != null ) { % some extra HTML for a novice <% } else { % some HTML for an expert <% } % This is presentation logic, so it makes sense that it is in a view vs the controller. However, it gets ugly really fast, especially when ReSharper wants to move all the braces around to make it even uglier (is there a way to turn that off for views?). My question is whether this is proper, or should I branch in the controller to two separate views? If I do two views, I will have a lot of duplicated HTML to maintain. Or should I do two separate views with a shared partial view of the stuff that is in common?

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  • correct way to turn EAR module into OSGI bundle

    - by Osw
    Greetings to all! There is a necessity to turn part of EAR (namely - war) into OSGI bundle and retain it's interoperability. Glassfish 3.0.1 already has osgi-web-container module and I succeeded to deploy standalone OSGI war. But in case of of ex-enterprise war it looks a bit difficult to me. What do I do with EJB calls from inside future OSGI war? Is it enough to replace @EJB injections with true JNDI lookups? What about APIs and libraries shared across EAR? I could split and rearrange them, but still I will have at least one jar needed by both EAR and OSGI war. Duplicate, make it as OSGI-bundle itself and make it available to ear somehow, place it GF domain's library path? Any other ideas, advices which could make that hybrid working? Many thanks in advance, Osw

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  • Downloading HTTP URLs asynchronously in C++

    - by Joey Adams
    What's a good way to download HTTP URLs (e.g. such as http://0.0.0.0/foo.htm ) in C++ on Linux ? I strongly prefer something asynchronous. My program will have an event loop that repeatedly initiates multiple (very small) downloads and acts on them when they finish (either by polling or being notified somehow). I would rather not have to spawn multiple threads/processes to accomplish this. That shouldn't be necessary. Should I look into libraries like libcurl? I suppose I could implement it manually with non-blocking TCP sockets and select() calls, but that would likely be less convenient.

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  • What production software have you written in F# in the past year or so that you would previously hav

    - by Peter McGrattan
    Over the last few years F# has evolved into one of Microsoft's fully supported languages employing many ideas incubated in OCaml, ML and Haskell. Over the last several years C# has extended it's general purpose features by introducing more and more functional language features: LINQ (list comprehension), Lamdas, Closures, Anonymous Delegates and more... Given C#'s adoption of these functional features and F#'s taxonomy as an impure functional language (it allows YOU to access framework libraries or change shared state when a function is called if you want to) there is a strong similarity between the two languages although each has it's own polar opposite primary emphasis. I'm interested in any successful models employing these two languages in your production polyglot programs and also the areas within production software (web apps, client apps, server apps) you have written in F# in the past year or so that you would previously have written in C#.

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  • How to check for an active Internet Connection on iPhone SDK?

    - by Brock Woolf
    I would like to check to see if I have an Internet connection on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSUrl. The way I did it seems a bit unreliable (because even Google could one day be down and relying on a 3rd party seems bad) and while I could check to see for a response from some other websites if Google didn't respond, it does seem wasteful and an unnecessary overhead on my application. - (BOOL) connectedToInternet { NSString *URLString = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://www.google.com"]]; return ( URLString != NULL ) ? YES : NO; } Is what I have done bad? (Not to mention 'stringWithContentsOfURL' is deprecated in 3.0) And if so what is a better way to accomplish this?

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