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• Automate gdb: show backtrace every 10 ms.

  - by osgx

  Hello I want to write a script for gdb, which will save backtrace (stack) of process every 10 ms. How can I do this? It can be smth like call graph profiling for 'penniless' (for people, who can't use any sort of advanced profiler). Yes, there are a lot of advanced profilers. For popular CPUs and for popular OSes. Shark is very impressive and easy to use, but I want to get a basic functionality with such script, working with gdb.

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• Coding guidelines + Best Practices?

  - by Chathuranga Chandrasekara

  I couldn't find any question that directly applies to my query so I am posting this as a new question. If there is any existing discussion that may help me, please point it out and close the question. Question: I am going to do a presentation on C# coding guidelines but it is not supposed to limit to coding standards. So I have a rough idea but I think I need to address good programing practices. So the contents will be something like this. Basic coding standards - Casing, Formatting etc. Good practices - Usage of Hashset over other data structures, String vs String Builder, String's immutability and using them effectively etc Really I would like to add more good practices (Especially to improve the performance.) So like to hear some more good practices to be used with C#. Any suggestions??? (No need of large descriptions :) Just the idea is sufficient.)

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• Manipulating multi-track ogg files programatically

  - by Chad Birch

  I'm planning to create a program for manipulating multi-track OGG files, but I don't have any experience with the relevant libraries, so I'm looking for recommendations about which language/library to use for this. I don't really have any preference for the language, I'll happily code it in C, C#, Python, whatever makes things the easiest (or even possible). Perhaps it's even a possibility to automate Audacity somehow? In terms of requirements, I'm not looking for anything particularly fancy. It will probably be a command-line program, I don't need to be able to play the audio, draw image representations of the waveforms, etc. The program will basically be used as a converter, but I need to do some processing before outputting. That is, I need the ability to programatically remove some tracks, set panning per-track, change track volumes, etc. Nothing too complex, just some basic processing, and then output the result in either MP3 or a format easily converted to MP3, such as WAV. Any suggestions or general information would be appreciated, thanks.

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• Any way to get read timeouts with Java NIO/selectors?

  - by mmebane

  I'm converting a Java server application which used blocking IO and thread-per-client to NIO and a single IO thread (probably a thread pool after I get the basic implementation done). The one thing I am having an issue with is disconnecting clients after they have been idle for a period. I had previously been using SO_TIMEOUT and blocking reads. However, with selector-based IO, reads don't block... I was hoping that I'd be able to set a timeout and be able to select on read timeout, with something like SelectionKey.isReadTimeout(), but nothing like that seems to exist. The current best solution I have come up with is to have a Timer with a TimerTask which keeps track of the keys which are waiting on read, and then canceling them and re-scheduling them on each read. Is there a better solution?

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• Can't authenticate with different NTLM credentials in one session with java.net.URLConnection

  - by ndn

  When I access a HTTP server using the standard Java API (java.net.URLConnection), the credentials are "cached" after the first successful authentication, and subsequent calls to Authenticator.setDefault() have no effect. So, I need to restart the application in order to use different credentials. I don't observe this effect when Basic Authentication is used. But I need to use NTLM for the server I'm accessing, and the Jakarta Commons HttpClient isn't an alternative either because it doesn't support NTLMv2 (see http://oaklandsoftware.com/papers/ntlm.html) Looking at the packets using Wireshark, I also observe that before the first successful authentication, an authentication with the current Windows credentials is attempted first. But after succesful authentication, only the saved credentials are used. Is there any way to reset or change the credentials java.net.Authenticator is using after a successful NTLM authentication?

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• Managing Team Development with SSAS, TFS, & BIDS

  - by Kevin D. White

  I am currently a single BI developer over a corporate datawarehouse and cube. I use SQL Server 2008, SSAS, and SSIS as my basic toolkit. I use Visual Studio +BIDS and TFS for my IDE and source control. I am about to take on multiple projects with an offshore vendor and I am worried about managing change. My major concern is manging merges and changes between me and the offshore team. Merging and managing changes to SQL & XML for just one person is bad enough but with multiple developers it seems like a nightmare. Any thoughts on how best to structure development knowing that sometimes there is no way to avoid multiple individuals making changes to the same file?

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• How to track my flash video player embed on other sites

  - by Dragomir Dan

  Setup: an online tv channel with "youtube" like clips and categories our own flash video player which can be embeded into other remote sites as2 flash player Goal: To track who's embeding my videos, at least with basic statistics per domain. Since it's AS2, it's harder to do this. My ideea is that I can create a php page which should be opened each time the player loads on any website; than the flash player can do a "geturl" of the php file which has Google Analytics code or some other decent tracker. The geturl command could contain a variable like the Video Title which already is included in the player; and this title would pass on with GET to the php file and setup a dynamic page title which can be tracked very well. Problem: how to i use the GETURL function without have user's browser open a new tab or window. Is there any hidden way to do it?

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• .NET application per-machine/per-user licensing

  - by MainMa

  I am about to implement a very basic licensing feature for my application. A serial number may be granted per-machine (or per-operating-system) or per-user (as for CAL in Windows Server: if my application is used by several users on one machine or if it is used by one user on several machines). For per-operating-system licensing, I use SerialNumber of Win32_OperatingSystem. For per-user licensing, I use: WindowsIdentity currentIdentity = WindowsIdentity.GetCurrent(); if (currentIdentity != null) { SecurityIdentifier userSid = currentIdentity.User.AccountDomainSid; Console.WriteLine(userSid); } A hash of an obtained OS serial number or SID is then stored in the database, associated with application serial; each time the program starts, it queries the server, sending hash of OS SN/SID and application serial. Is it a right thing to do it or is it completely wrong? Will it work on every Windows machine? (For example, using motherboard serial is wrong)

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• Displaying Calendar in an Android App

  - by Rony

  Hi experts, I would be obliged if someone could provide me a solution as to which component to be used so that, I can display a fairly good looking calender in my android application. I kept browsing for a solution for the past two days, but unfortunately could not find a solution. Since, this is a very basic requisite, I am sure that, there will be a perfect solution for this. Please help with suggestions, comments and solutions. ANy help in this regard is well appreciated. Looking forward, Regards, Rony

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• Multithreaded program in C: calculating thread stack space

  - by SlappyTheFish

  Situation: I am writing a program in C that maintains a number of threads. Once a thread ends, a new one is created. Each thread forks - the child runs a PHP process via exec() and the parent waits for it to finish. Each PHP process takes the next item from a queue, processes it and exits. Basic code: http://www.4pmp.com/2010/03/multitasking-php-in-parallel/ Problem: The PHP processes are Symfony tasks and Symfony requires a fairly huge amount of memory. How can I safely calculate the required stack space for each thread so that PHP processes will have enough memory? The memory limit set in php.ini is 128Mb so should I allocate this much space in the stack?

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• SimpleModal, How to close pop up window with animation

  - by bhsstudio

  Hi, I am very new to jQuery. I have a questino about the SimpleModal. I am trying to close the pop up window with animation effect, but failed. Here is my code. $('#btnClose').click(function(e) { // Closing animations $("#content").modal({ onClose: function(dialog) { dialog.data.fadeOut('slow', function() { dialog.container.hide('slow', function() { dialog.overlay.slideUp('slow', function() { $.modal.close(); }); }); }); } }); }); <div id="content" style="display: none;"> <h1>Basic Modal Dialog</h1> <a href='#' id="btnCloset">Close</a> </div> When I click on the "Close" link, nothing happens. Any help please? Thank you very much!

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• HTML Form Upload PDF with other form contents using PHP

  - by Sev

  I have a HTML form with fields such as name, address, notes, etc. I also have a field to upload a PDF. The uploaded PDF get's stored on the file system. How can I accomplish this if possibly the PDF files are larger than 2 MBs? Also, for some reason, the uploading of the PDF (< 2 MBs) works fine in Chrome, but not in IE. In IE, the upload doesn't even begin, but in Chrome, it completes fine. Form header looks like: method='post' ENCTYPE='multipart/formdata' edit: the ini setting didn't help The HTML <input type='text' name='user' /> <input type='file' name='userfile' /> The basic PHP ( I do some preg matching above, that I haven't included) $uploaddir = 'uploads/'; $uploadfile = $uploaddir . basename($_FILES['userfile']['name']); if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) { echo "File is valid, and was successfully uploaded.\n"; } else { echo "File uploading failed.\n"; }

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• How Can I Deal With Those Dead Links After Revamping My Web Site?

  - by skyflyer

  Couple of months ago, we revamped our web site. We adopted totally new site structure, specifically merged several pages into one. Everything looks charming. However, there are lots of dead links which produce a large number of 404 errors. So how can I do with it? If I leave it alone, could it bite back someday, say eating up my pr? One basic option is using 301 redirect, however it is almost impossible considering the number of it. So is there any workaround? Thanks for your considering!

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• How to get regular expression matches between two boundaries

  - by Rubans

  Hi, I have the following text: started: Project: ProjectA, Configuration: Release Any CPU ------ I would like to get just the actual project name which in this example is "ProjectA". I do have a regular expression "started:(\s)Project:(\s).*," which will give me "started: Project: ProjectA," and then I can use further basic string searching to return the project name but was wondering if there is any way I can just grab the actual project name without doing the extra string searching, maybe using a correct regular expression. What I need is the string value between boundaries "started: Project: " and ",". Any ideas?

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• Perl file test operator help

  - by Aaron Moodie

  This is a really basic issue, but I'm new to perl and cannot work out what the issue is. I'm just trying to isolate the files in a directory, but the -d operator keeps treating all the folder contents as files ... @contents is my array, and when I run this: foreach $item(@contents) { if (-d $item) { next; } print"$item is a file\n"; } I keep getting both folders and files. Alternatively, if I use -f, I get nothing. edit: this is the output - file01.txt is a file folder 01 is a file folder 02 is a file Screen shot 2010-04-18 at 1.26.17 PM.png is a file I'm running this on OSX

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• No Flash, How do i handle jcupload ?

  - by acidzombie24

  I am using http://www.jcupload.com/ (basic) to upload files. I am considering having a friend write a more custom version or to do magic with ajax; so the solution should be able to work without that. With jcupload i include css, a script and write <div id="jcupload_content"></div> in my html and i am done. Problem is, with no flash i get an object box. Instead i would like is an iframe or a html form to upload the file. How do i do this? Should i detect flash from javascript and overload the div myself if no flash is available? How do i detect if flash is available? with jquery i know i can write something like $('#jcupload_content').innerHtml = blah; How do i handle the flash part?

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• Cocos2D, UIScrollView, and initial placement of a scene

  - by diatrevolo

  Hello: I am using a UIScrollView to forward touches to Cocos2D as outlined in http://getsetgames.com/2009/08/21/cocos2d-and-uiscrollview/ Everything works great after a few days of working with it, except one thing: when the initial view appears on the screen, the background appears to be scrolled to the center. As soon as I try to scroll around, the image jumps to 0,0, and everything works as normal, except the touches are offset by half the width and height of the background image. Am I overlooking something basic? I can't think of a useful portion of the code that illustrates the issue, as I can't track it down, but would be happy to post code if anyone has any ideas. Thanks in advance, -Roberto

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• VBA Outlook Mail .display, recording when/if sent manually

  - by ExcelCyclist

  My code displays a message with basic subject, body, attachment. Next the user manually updates and customizes the message and should send it. I want to record when (if) the email is sent. Is this possible or any tips? My environment is Office 2007 with an excel based macro going to Outlook. [Excerpt] Dim OutApp As Outlook.Application Dim OutMail As Outlook.MailItem Set OutApp = CreateObject("Outlook.Application") OutApp.Session.Logon Set OutMail = OutApp.CreateItem(olMailItem) With OutMail .To = Email '.CC = .Subject = Subj .BodyFormat = olFormatHTML .Body = Msg '.HTMLBody = Msg If Not FileAttach = vbNullString Then .Attachments.Add (FileAttach) .Display End With

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• regular expression with "|"

  - by WtFudgE

  I need to be able to check for a pattern with | in them. For example an expression like d*|*t should return true for a string like "dtest|test". I'm no regular expression hero so I just tried a couple of things, like: Regex Pattern = new Regex("s*\|*d"); //unable to build because of single backslash Regex Pattern = new Regex("s*|*d"); //argument exception error Regex Pattern = new Regex(@"s*\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*|*d"); //argument exception error Regex Pattern = new Regex("s*\\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex("s*" + "\\|" + "*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*\\|*d"); //argument exception error I'm a bit out of options, what should I then use? I mean this is a pretty basic regular expression I know, but I'm not getting it for some reason.

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• Issue Passing NSMutableDictionary to Method

  - by roswell

  Hello all, I'm trying some basic iPhone programming -- all has been going well but recently I've hit a bit of a roadblock. I've got a chunk of code that's passing an NSMutableDictionary (amongst other things) to a method in another class: [self.shuttle makeAPICallAndReturnResultsUsingMode:@"login" module:@"login" query:credentials]; The NSMutableArray credentials is previously defined a bit above as such: NSMutableDictionary *credentials = [[NSMutableDictionary alloc] init]; [credentials setObject:username forKey:@"username"]; [credentials setObject:password forKey:@"password"]; The method that receives it looks like such: -(id)makeAPICallAndReturnResultsUsingMode:(NSString *)mode module:(NSString *)module query:(NSMutableDictionary *)query From debugging I have determined that the code works fine up until this point within the above method: [query setObject:self.sessionID forKey:@"session_id"]; At this point, the application terminates -- the Console informs me of this exception: * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[NSCFDictionary setObject:forKey:]: method sent to an uninitialized mutable dictionary object' This leads me to believe that I must initialize NSMutableDictionary in some way in my new method before I can access it, but I have no idea how. Any advice?

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• Website downloader library

  - by Midhat

  I need to put a little project together for myself, and I need some functionality to download a page for offline viewing. Is there a library that will download a given page and its embedded images, and edit the img tags to reflect the local locations of the images. I know there are a lot of website downloaders out there, but I cant find something that i can use directly in my code. I have some basic scripts done in python, so Python is very welcome. but pretty much any language will do.

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• Java replace slow?

  - by cpf

  Hi StackOverflow, I have a Java application that makes heavy use of a large file, to read, process and give through to SolrEmbeddedServer (http://lucene.apache.org/solr/). One of the functions does basic HTML escaping: private String htmlEscape(String input) { return input.replace("&", "&amp;").replace(">", "&gt;").replace("<", "&lt;") .replace("'", "&apos;").replaceAll("\"", "&quot;"); } While profiling the application, the program spends roughly 58% of the time in this function, a total of 47% in replace, and 11% in replaceAll. Now, is the Java replace that slow, or am I on the right path and should I consider the program efficient enough to have its bottleneck in Java and not in my code? (Or am I replacing wrong?) Thanks in advance!

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• Intergration of checkout badges into an order form

  - by Reno

  Hi Does anyone know how to integrate several checkout badges into an order form? It might sound obvious to all (or most) but within the html wouldn't the form tag have an action to just one of the online merchants and not all? For example? I would like to have a basic order form which collects a users name, email, uploaded files, project details, and a few packages to choose from. Once they have selected the package most appropriate to them? They would be given a total cost and asked to pay via Paypal, Google Checkout OR Moneybookers. Can anyone help me out on this? Or point me in the direction where I can obtain further knowledge? Thanks in advance. Reno

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• How to do pointer work with accessor methods in Objective-C

  - by Jasconius

  Basic problem statement: I have a very good reason for doing some pointer fanciness in an app where I need to pass a decimal by reference. So I have a class which stores many a decimal, so let's say is has a property as such: @property (nonatomic) double myDecimalValue; I want to pass it by reference to some other class. [someOtherObject sendMyDecimalByReference:&myDecimalValue]; But, a problem emerges! The way that actually has to be written (because it's a property) is [someOtherObject sendMyDecimalByReference:&decimalOrigin.myDecimalValue]; This fails to compile in objective-c I get around it by writing the following - (double *) myDecimalValueRef; [someOtherObject sendMyDecimalByReference:[decimalOrigin myDecimalValue]]; Except I have dozens of these decimals and I don't want to write that stupid wrapper function for every value. Is there a shorthand way to do this in Objective-C using just the Getter functions? Let's just assume I have a great reason for not using NSNumber. Thanks!

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• Creating Facebook Apps .. going mad

  - by ArneRie

  Hi, iam trying to create my first Application running inside an Facebook Canvas. Iam using Zend Framework (PHP) for this project. But iam not able to understand all the different ways facebook is offering. There is an PHP SDK wich works so far. There is an Javascript SDK and something called FBJS? Does someone knows a good point to start? The Documentation is not actual most times. I have managed it to login, and show my picture and name inside the app, the basic stuff is working.

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