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  • Extending Ruby, calling a function from C

    - by ThePower
    Hi, I'm writing an app that calls ruby code from c. I am having a little difficulty and wondered if anyone could point me in the rite direction. I currently have in my C. #include ruby.h main() { ruby_init(); rb_require("myRubyFile"); rb_funcall(rb_module_new(), rb_intern("RubyFunction"), 0, NULL); } My ruby file is in the same directory as my c file and is called myRubyFile.rb and contains a definition of the function RubyFunction(). This is a cut down of what I actually want to do, just making it more readable for others. I just require some feedback as to whether this is the correct method to call ruby code from my c file. Regards

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  • Stack memory in Android

    - by Matt
    I'm writing an app that has a foreground service, content provider, and a Activity front end that binds to the service and gets back a List of objects using AIDL. The service does work and updates a database. If I leave the activity open for 4-8+ hours, and go to the "Running Services" section under settings on the phone (Nexus One) an unusually large amount of memory being used is shown (~42MB). I figure there is a leak. When I check the heap memory i get Heap size:~18MB, ~2MB allocated, ~16MB free. Analyzing the hprof in Eclipse MAT seems fine, which leads me to theorize that memory is leaking on the stack. Is this even possible? If it is, what can I do to stop or investigate the leak? Is the reported memory usage on the "Running Services" section of android even correct (I assume it is)? Another note: I have been unable to reproduce this issue when the UI is not up (with only the service running)

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  • Image 8-connectivity without excessive branching?

    - by shoosh
    I'm writing a low level image processing algorithm which needs to do alot of 8-connectivity checks for pixels. For every pixel I often need to check the pixels above it, below it and on its sides and diagonals. On the edges of the image there are special cases where there are only 5 or 3 neighbors instead of 8 neighbors for a pixels. The naive way to do it is for every access to check if the coordinates are in the right range and if not, return some default value. I'm looking for a way to avoid all these checks since they introduce a large overhead to the algorithm. Are there any tricks to avoid it altogether?

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  • shell script fun! how to perform an action on each subdirectory from a given path??

    - by pocketfullofcheese
    I am writing a shell script (which I suck at) and I need some help. Its a script that is moving things from git to CVS (not important). The thing is, i a file path: controllers/listbuilder/setup/SubmissionRolesListbuilderHandler.inc.php and I need to be able to do: cvs add controllers; cvs add controllers/listbuilder; cvs add controllers/listbuilder/setup; cvs add controllers/listbuilder/setup/SubmissionRolesListbuilderHandler.inc.php Can someone help me out? The best I've come up with so far is to recursively add ALL files in my working tree, but that seems overly inefficient.

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  • TimeZoneInfo - why can't i seem to create an instance of it?

    - by Kravlin
    I'm trying to use the EWS API to access an Exchange server from a console program i'm writing. I've specified the type of exchange server i'm connecting to but when I try to execute the code i have, it gives me Error 1 The type 'System.TimeZoneInfo' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. C:\Documents and Settings\jsorensen\My Documents\Visual Studio 2005\Projects\ConsoleApplication2\ConsoleApplication2\Program.cs 26 13 ConsoleApplication2 Does Microsoft Visual Studio Academic Edition not support TimeZoneInfo or is the version of .Net that XP can have not up-to date enough to work with the EWS API? I'm moderately new to programming in C# so some of the stuff is still confusing. Thanks.

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  • Vala vapi files documentation

    - by Jordan
    Hi there, I'd like to hack on an existing GLib based C project using vala. Basically what I'm doing is, at the beginning of my build process, using valac to generate .c and .h files from my .vala files and then just compiling the generated files the way I would any .c or .h file. This is probably not the best way, but seems to be working alright for the most part. My problem is that I'm having a hard time accessing my existing C code from my Vala code. Is there an easy way to do this? I've tried writing my own .vapi files (I didn't have any luck with the tool that came with vala), but I can't find any decent documentation on how to write these. Does any exist? Do I need one of these files to call existing C code? Thanks.

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  • Enabling PostgreSQL support in PHP on Mac OS X

    - by Jordan Scales
    I'm having a terribly difficult time getting the command "pg_connect()" to work properly on my Mac. I'm currently writing a PHP script (to be executed from console) to read a PostgreSQL database and email a report. I've gone into my php.ini file and added extension=pgsql.so But, I'm met with the following error. PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib/php/extensions/no-debug-non-zts-20090626/php_pgsql.so' - dlopen(/usr/lib/php/extensions/no-debug-non-zts-20090626/php_pgsql.so, 9): image not found in Unknown on line 0 PHP Fatal error: Call to undefined function pg_connect() in... (blah file here) When running phpinfo(), I see nothing about PostgreSQL, so what is my issue here?

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  • Reasons why one should not call the garbage collector directly.

    - by Shimrod
    Hi everyone, I'm currently writing a paper for my company, about how to avoid calling the garbage collector directly from the code (when playing with COM objects for instance). I know this is a bad practice, and should be only considered in very rare cases, but I can't seem to find a way to tell why it should be avoided. And I don't want to rely on the "The G.C. is smarter than you" principle (even if it is the truth :-) ) So can you tell me some clues about why you think one should avoid to call the garbage collector directly ? (performance impact?) Or maybe if you have links about this particular topic, they would be very helpful. Thanks in advance !

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  • How to secure Java webservices with login and session handling

    - by hubertg
    I'd like to secure my (Java metro) webservice with a login. Here's how I'm planning to do that: Steps required when calling a webservice method are: call login(user,pwd), receive a session token 1.1 remember the token call servicemethod (token, arg1, arg2...) webservice checks if the token is known, if not throw exception otherwise proceed logout or timeout after x time periods of inactivity my questions: 1. what's your opinion on this approach? does it make sense? 2. are there any libraries which take the burden of writing a session handling (maybe with database persistence to survive app restarts) (the solution should be simple and easily usable with Java and .NET clients) thanks!

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  • Overlay of multiple colors in ImageJ

    - by nico
    Hi everyone, I'm writing a little plugin for imageJ and I am drawing several regions as an overlay on the image. I'm using this code: ImagePlus imp = getImage(); Overlay ov = new Overlay(); for (int r=0; r<regions.length; r++) { ov.add(regions[r]); } imp.setOverlay(ov); Where regions is an array of Roi. This works as intended and draws the regions in the (hurting to my eyes) standard ImageJ cyan used for overlays. I would like to draw one particular region in another colour, but I cannot seem to find a way to do it. I found that you can change the colour of the whole overlay, but I need two colours in the same overlay. Any ideas? Thanks in advance nico

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  • A method to change effective user id of a running program?

    - by Brendan Long
    I'm writing a simple package manager and I'd like to automatically try sudo if the program isn't run as root. I found a function called seteuid, which looks likes it's exactly what I need, but I don't have the permissions to run it. So far all I can think of is a bash script to check before they get to the actual binary, but I'd like to do this all as C++ if possible. Is there any method of changing a processes's euid after it starts executing? Or a way to call sudo?

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  • Table comment length in mysql

    - by azerole
    According to MySQL manual, table comments are limited to 60 characters. I'm designing the schema in MySQL Workbench, which does not enforce this limit, so I end up with writing more than 60 symbols quite often, and this causes the SQL script to fail. To tell the truth I would be quite happy with table comments being internal to my schema (i.e. not exported to the actual database), but Workbench doesn't allow this either. Hence my question: is there a way to increase maximum length of table comment in MySQL to 255?

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  • URL redirect/remapping to a Django app, using DNS or Apache

    - by Art
    Typically I've been lucky enough to have a fairly simple Django and Apache configuration. But now I'm writing several apps that will sit on the same server and I need them to each have individual domains. The apps live at www.myserver.com/app/app1 (app2...) and I would like to access it using www.someawesomedomain.com. I don't want a redirect since I do not want to expose the underlying path. What is the best way to do this, in the context of 5 - 10 sites? I'm using Apache2.

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  • Web Services: Secure? Asp.net

    - by Jacques
    Hey there, Something I can't wrap my head around is how secure web services are. For example we're writing a desktop application that will interact with data on one of our websites as well as local data. This data is sensitive though and the last thing we want is anybody calling the web services. I've not yet found anything that says web services has some kind of authentication methods and the only security I've seen people talk about is using certificates to encrypt the message. I'm no guru on this and would appreciate anyone's input and perhaps a link to somewhere that will explain this in simple terms. Thanks Jacques

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  • Including libraries in project. Best practise.

    - by mridang
    Hi guys, I'm writing a Python open-source app. My app uses some open source Python libraries. These libraries in turn use other open-source libraries. I intend to release my code at Sourceforge or Google Code but do I need to include the sources of the other libraries? Is this a good practice? ...or should I simply write this information into a README file informing the use about the other required libraries. I've placed all these libraries into a libs sub folder in my source directory. When checking my code into SVN, should I use something called svn:externals to link to other sources? Is there a way to dynamically update my libraries to the latest version or is this something I have to do manually when I release a new version. My sincerest apologies if my question sounds vague but I'm pretty lost in this matter and I don't know what to Google for. Thanks all.

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  • Google suggest API does not work with Chinese locale

    - by SadSido
    Hi, everyone! I have a problem with Google suggest API when using Chinese locale. I am picking Chinese hieroglyphs at random and use the REST API to retrieve suggestions. Unfortunately, Google always return an empty list of suggestions (I am completely sure, that I convert my request in utf-8, and it is working fine with other languages, ex. Russian): Sample request: http://suggestqueries.google.com/complete/search?qu=%E9%80%9F Google answer: window.google.ac.h(["?",[]]) Does anyone know how to retrieve suggestions for Chinese locale? Maybe I am missing some flags or something? Maybe there is an official document from Google, saying that Chinese is not supported? And are there any people from China, using Google toolbar? Does it really work? I'd appreciate any help! If it matters, I am writing a simple WinAPI application, using C++...

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  • How to get a clipboard paste notification and provide my own data?

    - by Uwe Keim
    For a small utility I am writing (.NET, C#), I want to monitor clipboard copy operations and clipboard paste operations. My idea is to provide my own data when pasting into an arbitrary application. The monitoring of a copy operation can be easily done by using a clipboard viewer. Something that seems much more advanced to me is to write a "clipboard paste provider": Answer to "what formats are available" queries of applications. Supply data to application paste operations. I found this posting and this posting, but none of them seems to really help me. What I guess is that I somehow have to mimic/hijack the current clipboard. Question: Is it possible to "wrap" the clipboard in terms of paste operations and provide my own kind of "clipboard proxy"? Thanks Uwe

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  • How to return a dynamic value from a Mocha mock in Ruby

    - by Vivek
    The gist of my problem is as follows:- I'm writing a Mocha mock in Ruby for the method represented as "post_to_embassy" below. It is not really our concern, for the purpose of describing the problem, what the actual method does. But I need the mock to return a dynamic value. The proc '&prc' below is executing rightly in place of the actual method. But the "with" method in Mocha only allows for boolean values to be returned. So the code below outputs nil. I need it to output the value being passed through orderInfoXml. Does anyone know of an alternate method I can use? require 'rubygems' require 'mocha' include Mocha::API class EmbassyInterface def post_to_embassy(xml) puts "This is from the original class:-" puts xml return xml end end orderInfoXml = "I am THE XML" mock = EmbassyInterface.new prc = Proc.new do |orderXml| puts "This is from the mocked proc:-" puts orderXml orderXml end mock.stubs(:post_to_embassy).with(&prc) mock_result = mock.post_to_embassy(orderInfoXml) p mock_result #p prc.call("asd") output:- This is from the mocked proc:- I am THE XML nil

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  • Want to load jquery dialog from a different web-page

    - by Jake
    I'm a bit of a n00b with jquery so this one is probably an RTFM question: I'm writing an application to create a somewhat complex record for my client. Building the record requires doing a couple of server side searches inside a dialog. Right now I have everything framed up in 1 file (asp.net) and it's ok. But I can see as I add the business logic and the communication with the server this is going to get really ugly. I'm alreay putting most of the javascript in external files, but I'd like to move the HTML for the dialogs out too. How do I get the jquery dialog method to load the dialog body from the html files? Something like: getDialogHTML(dialogHolderDiv); <---magic goes here var dialogOptions = { ... }; $("#"+dialogHolderDiv).dialog(dialogOptions); $("#"+dialogHolderDiv).dialog('open'); any help will be apperciated .

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  • Drawing RAW buffer to CGBitmapContext

    - by Raj
    Hi all, I have a raw image buffer in the RGB format. I need to draw it to CGContext so that I get a new buffer of the format ARGB. I accomplish this in the following way: Create a data provider out of raw buffer using CGDataProviderCreateWithData and then create image out of the data provider with the api: CGImageCreate. Now if I write this image back to the CGBitmapContext using CGContextImageDraw. Instead of creating an intermediate image, is there any way of writing the buffer directly to CGContext so that I can avoid the image creation phase? Thanks

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  • How do you create a unit-testing stub for an interface containing a read-only member?

    - by Robert Harvey
    I am writing some unit tests for an extension method I have written on IPrincipal. To assist, I have created a couple of helper classes (some code for not-implemented members of the interfaces has been omitted for brevity): public class IPrincipalStub : IPrincipal { private IIdentity identityStub = new IIdentityStub(); public IIdentity Identity { get { return identityStub } set { identityStub = value } } } public class IIdentityStub : IIdentity { public string Name { get; set; } } However, the Name property in the IIdentity interface is read-only (the IIDentity interface specifies a getter but not a setter for the Name property). How can I set the Name property in my stub object for testing purposes if the interface has defined it as a read-only property?

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  • Moving a C# Program to a different language

    - by waiwai933
    I am currently in charge of the development of the second version of program that was created in Microsoft .NET C#. I'm not doing any actual programming, but I am writing the specification for the programmer. I'd like to take it off the .NET codebase, but since Joel said on his blog never to rewrite code, and he does provide good reasoning, I'm inclined to think carefully. So my question is, (1) Are there any easy ways to transition? (Languages like .NET C#) (2) Would you take it off .NET? (3) If so, what language would you use? The reason I want to take it off of .NET is as far as my understanding of .NET, it has to be installed on the client. I'd prefer not to inconvenience my customers when there's a better way.

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  • How to log with Ruby and eventmachine?

    - by Justin
    I'm writing an application using Ruby and the Eventmachine library. I really like the idea of non blocking I/O and event driven systems, the problem I'm running into is logging. I'm using Ruby's standard logger library. Its not that logging takes forever but it seems like something that shouldn't block and it does. Is there a library out there somewhere that extends Ruby's standard logger implementation to be non-blocking or should I just call EM::defer for my logging calls? Is there a way I can make eventmachine do this for me already?

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  • How can you determine when the user scrolls to the bottom of a DataGridView?

    - by Craig
    I am writing a C# Windows Forms Application in Visual Studio 2008. I have a DataGridView with a lot of data in it. I would like to initially only populate 10,000 rows and add more only when the user scrolls to the bottom. I am handling the DataGridView's Scroll event, but it never seems to raise with the ScrollEventArgs.Type property set to Last, which is the condition I think I need to catch to add more rows. I have read about people having bad experiences with the DataGridView.Scroll event (e.g. http://stackoverflow.com/questions/785200/datagridview-scroll-event-and-scrolleventtype-endscroll), but the solution provided (http://stackoverflow.com/questions/472389/how-can-i-receive-the-scroll-box-type-scroll-events-from-a-datagridview/767603#767603) only adds the ScrollEventArgs.Type property to come back as EndScroll, not Last like I need. Does anybody know how to get the event to raise properly, or another way to accomplish this task?

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  • Is there any HTML wysiwyg editor?

    - by martin
    I wonder whether there is any good WYSIWYG editor when it comes to editing complex HTML pages generated from ASP.NET, PHP, GWT or anything else. I've tried a lot of WYSIWYG tools, but after a certain point I always end up with manually editing the HTML source code or CSS to fix different issues. The editors I've tried are never compatible with the ASP.NET/PHP/etc code I'm writing. Edit: I have used Visual Studio for a few years to do ASP.NET development. After a while, it always comes to the point where I can't even open the pages and user controls because they rely on so many things which aren't available in debug time.

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