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  • Canvas context used but not updated on canvas

    - by John Doe
    I am developing an small html5 game, where I have the following code: if(object.blocks){ var blocks = object.blocks, that = this; each(blocks,function(index){ that.blocks.push(new Block(this[index])); }); } I receive an object with some configuration and instantiate blocks with it. It works fine, but the Block class has an method, called draw: this.draw = function (ctx){ if(ctx){ var colors = ['#FF0000','#FFFF00','#0000FF','#00FF00'], color = Math.round(Math.random() * colors.length-1); ctx.fillStyle = colors[color]; ctx.fillRect(this.x,this.y,this.width,this.height); } }; It was working before I moved it into the Block class, but now it draws nothing. This is the code that calls draw: render: function(ctx){ each(this.blocks,function(index){ this[index].draw(ctx); }); } The context comes from the html page, from the main canvas.

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  • serving large file using select, epoll or kqueue

    - by xask
    Nginx uses epoll, or other multiplexing techniques(select) for its handling multiple clients, i.e it does not spawn a new thread for every request unlike apache. I tried to replicate the same in my own test program using select. I could accept connections from multiple client by creating a non-blocking socket and using select to decide which client to serve. My program would simply echo their data back to them .It works fine for small data transfers (some bytes per client) The problem occurs when I need to send a large file over a connection to the client. Since i have only one thread to serve all client till the time I am finished reading the file and writing it over to the socket i cannot resume serving other client. Is there a known solution to this problem, or is it best to create a thread for every such request ?

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  • C# double-quoted path name being escaped when read from file

    - by KrisTrip
    I am trying to read in a text input file that contains a list of filenames (one per line). However, I am running into an issue if the user double-quotes the path (because it has a space in it). For example, a normal input file might have: C:\test\test.tiff C:\test\anothertest.tiff C:\test\lasttest.tiff These get read in fine by my code ("C:\\test\\test.tiff" etc) However, if I have the following input file: "C:\test with spaces\test.tiff" "C:\test with spaces\anothertest.tiff" "C:\test with spaces\lasttest.tiff" These get read in double-quotes and all ("\"C:\\test with spaces\\test.tiff\"" etc). This becomes a problem when I try to open the files (I understandably get invalid character exceptions). My question is, how do I fix this? I want to allow users to input quoted strings and handle them correctly. My first impression was to just write a little method that strips off beginning or ending quotes, but I thought there might be a better way.

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  • POX return data from WCF Data Services

    - by keithwarren7
    I am using WCF Data Services (netfx4) to provide data sourced from SQL via EF, the standard OData mechanism is fine and JSON works as well but I need a third option for generic POX (plain old xml). I have yet to come across a simple strategy or switch that allows me to control this but I am sure one must exist or a workaround method might be available. Any ideas? Ideally I would like to be able to use something like the JSONP option wherein I append 'format=JSON' to the URL, in this case 'format=pox' or 'POX=true' or something of that nature.

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  • Rails: simple bundler question with ruby-openid

    - by Joern Akkermann
    Hi! I just installed the ruby-openid gem and then bundled it by entering gem 'ruby-openid', :require => 'openid' in the gemfile. Then I started bundle install and bundle lock. Everything worked fine so far. But how can I now access the classes of ruby-openid. OpenID::method won't work for me. It raises a not found error. What have I forgot or done wrong? I'm absolutely new to bundler and the internet full of solutions for various versions, but I need one solution that's surely working. I'm thankful for any help!

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  • VS2008 asp.net spits out gibberish, possibly wrong encoding issue.

    - by Edward M Meshuris
    Hello, I have inherited a project, it was originally written in VS2005. I have made a few changes, but all are design. Now when I run the project using the visual studio's web server, in IE8, the page shows up just fine, however in FireFox 3.6.3, I get gibberish (a full page of this): ?I?%&/m?{J?J??t??$?@?????iG#)?*??eVe]f@?? ??{???{??;?N'????\fdl??J??!????~|?"~???????7????t?.???WO???? m???{'w?}?4??????x'}??W?{???G?G?]=?{???j|uo\?w???Pv??? My setup: Windows 7 Proffesional (All patches) VS2008 SP1 (I think all patches) Thank you for your help! -Edward

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  • Add comma-separated value of grouped rows to existing query

    - by Peter Lang
    I've got a view for reports, that looks something like this: SELECT a.id, a.value1, a.value2, b.value1, /* (+50 more such columns)*/ FROM a JOIN b ON (b.id = a.b_id) JOIN c ON (c.id = b.c_id) LEFT JOIN d ON (d.id = b.d_id) LEFT JOIN e ON (e.id = d.e_id) /* (+10 more inner/left joins) */ It joins quite a few tables and returns lots of columns, but indexes are in place and performance is fine. Now I want to add another column to the result, showing comma-separated values ordered by value from table y outer joined via intersection table x if a.value3 IS NULL, else take a.value3 To comma-separate the grouped values I use Tom Kyte's stragg, could use COLLECT later. Pseudo-code for the SELECT would look like that: SELECT xx.id, COALESCE( a.value3, stragg( xx.val ) ) value3 FROM ( SELECT x.id, y.val FROM x WHERE x.a_id = a.id JOIN y ON ( y.id = x.y_id ) ORDER BY y.val ASC ) xx GROUP BY xx.id What is the best way to do it? Any tips?

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  • How do I upgrade my Crystal Report libraries in a .NET 3.5 project to CR XI R2?

    - by Stuart B
    Our project currently uses Crystal Reports for Visual Studio 2008. We need to upgrade to XI R2, but I'm having problems doing so. Here are the steps I followed: Install Crystal Reports XI R2. Collect updated assemblies from the GAC. I did this because I couldn't find version XI libraries in the "Add References..." dialog. I verified that these assemblies were of version 11.5.*. The libraries I gathered were: CrystalDecisions.CrystalReports.Engine CrystalDecisions.Enterprise.Framework CrystalDecisions.Enterprise.InfoStore CrystalDecisions.ReportSource CrystalDecisions.Shared CrystalDecisions.Windows.Forms Replace all references in my projects to version 10.5 Crystal libraries with references to the newer assemblies. Everything builds fine, but when I try to instantiate a ReportDocument, I get this error: The type initializer for 'CrystalDecisions.CrystalReports.Engine.ReportDocument' threw an exception. Is there anything I'm missing? Will this just not work?

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  • Test assembly code on a mac

    - by happyCoding25
    Hello, A while back I was following some tutorials an assembly. I was running it all on a windows machine, compiling with NASM and then writing the compiled code to a floppy disk, then reboot and try the code. This process was long and time consuming and sadly was not on a mac. When I found out that Xcode for mac installed NASM I immediately tried to compile some code. The code compiled fine. The issue is testing it. On a mac I have no floppy (not like I want to use one) so Im not sure how to test this. I looked in to Q (kju) and found it would only emulate things on an ISO file. So I guess what Im asking is is it possible to install the compiled code on an ISO file for testing? (Note: the code when compiled forms a .bin file) Thanks for any help

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  • Executing commands containing space in bash

    - by Epitaph
    I have a file named cmd that contains a list of unix commands as follows: hostname pwd ls /tmp cat /etc/hostname ls -la ps -ef | grep java cat cmd I have another script that executes the commands in cmd as: IFS=$'\n' clear for cmds in `cat cmd` do if [ $cmds ] ; then $cmds; echo "****************************"; fi done The problem is that commands in cmd without spaces run fine, but those with spaces are not correctly interpreted by the script. Following is the output: patrick-laptop **************************** /home/patrick/bashFiles **************************** ./prog.sh: line 6: ls /tmp: No such file or directory **************************** ./prog.sh: line 6: cat /etc/hostname: No such file or directory **************************** ./prog.sh: line 6: ls -la: command not found **************************** ./prog.sh: line 6: ps -ef | grep java: command not found **************************** ./prog.sh: line 6: cat cmd: command not found **************************** What am I missing here?

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  • jquery validation of comtrols

    - by Vinodtiru
    Hi , I am looking at validation of some text boxes for somethings like required, minlength, max length, email etc... I am able to get examples that work fine on submit button on page. I want to do this validation on a button click which will only raise a ajax request and not submit of page. On internet all the sample is found was with submit button. Is there a easy way to change this code a little bit o make it work for non submit button click or any new jquery or java plugin to do the same. I am using the jquery.validation.js for now. This works with submit buttons. Any kind of help with suggestion or help is appreciated. Thanks in advance.

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  • touchesEnded not being called??? or randomly being called

    - by Rob
    If I lift my finger up off the first touch, then it will recognize the next touch just fine. It's only when I hold my first touch down continuously and then try and touch a different area with a different finger at the same time. It will then incorrectly register that second touch as being from the first touch again. Update It has something to do with touchesEnded not being called until the very LAST touch has ended (it doesn't care if you already had 5 other touches end before you finally let go of the last one... it calls them all to end once the very last touch ends) - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch* touch = [touches anyObject]; NSString* filename = [listOfStuff objectAtIndex:[touch view].tag]; // do something with the filename now } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { ITouch* touch = [touches anyObject]; NSString* buttonPressed = [listOfStuff objectAtIndex:[touch view].tag]; // do something with this info now }

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  • PHP Curl's Proxy feature causes no information to be returned

    - by Grant David Bachman
    I'm working on a PHP script right now which sends requests to our school's servers to get real-time information about class sizes for different courses. The script runs perfectly fine when I don't use a proxy, returning a string full of course numbers and available seats. However, I want to make this a service for the students, and I'm afraid that if I make too many requests my ip will get blocked. So I'm attempting to do this through a proxy, with no success. As soon as I add the CURLOPT_HTTPPROXYTUNNEL and CURLOPT_PROXY fields to my requests nothing gets returned. I'm not even sure how to troubleshoot it at this point since I'm not getting an error message of any kind. Does anyone know what's going on or how to at least troubleshoot it?

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  • Anonymous Methods / Lambda's (Coding Standards)

    - by Mystagogue
    In Jeffrey Richter's "CLR via C#" (the .net 2.0 edtion page, 353) he says that as a self-discipline, he never makes anonymous functions longer than 3 lines of code in length. He cites mostly readability / understandability as his reasons. This suites me fine, because I already had a self-discipline of using no more than 5 lines for an anonymous method. But how does that "coding standard" advice stack against lambda's? At face value, I'd treat them the same - keeping a lambda equally as short. But how do others feel about this? In particular, when lambda's are being used where (arguably) they shine brightest - when used in LINQ statements - is there genuine cause to abandon that self-discipline / coding standard?

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  • Oracle 10g express home page is not coming up

    - by Adnan Anwar
    Hello All: My Oracle 10g Express Edition , I can login in the SQL plus but I cannot login into oracle via SQL developer and cannot view the Home page at link http://127.0.0.1:8080/apex. This was working fine until yesterday. I have checked via (WINDOWS)netstat -ab and no other app is using the 8080 port. The only thing I did today was I changed my SQL server 2005 Developer edition from Windows authentication to Mixed Mode authentication. Can anyone let me know how to get the Oracle Web page and the SQL Developer to work. I will gratly appreciate that. Thanks! Adnan A.

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  • How to remove objects from an Enumerable collection in a loop

    - by johnc
    Duplicate Modifying A Collection While Iterating Through It Has anyone a nice pattern to allow me to get around the inability to remove objects while I loop through an enumerable collection (eg, an IList or KeyValuePairs in a dictionary) For example, the following fails, as it modifies the List being enumerated over during the foreach foreach (MyObject myObject in MyListOfMyObjects) { if (condition) MyListOfMyObjects.Remove(myObject); } In the past I have used two methods. I have replaced the foreach with a reversed for loop (so as not to change the any indexes I am looping over if I remove an object). I have also tried storing a new collection of objects to remove within to loop, then looping through that collection and removed the objects from the original collection. These work fine, but neither feels nice, and I was wondering if anyone has come up with a more elegant solution to the issue

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  • Windows Authentication for winforms with Windows 2000

    - by The King
    I use the following code to validate users through windows authentication for my winform application. This works fine with windows XP but when the user is using windows 2000, it says that the userid or password is in valid. How do I do this in Windows 2000. Further, How do I detect whether the user is using Windows Xp or windows 2000. [System.Runtime.InteropServices.DllImport("advapi32.dll")] public static extern bool LogonUser(string userName, string domainName, string password, int LogonType, int LogonProvider, ref IntPtr phToken); public bool IsValidateCredentials(string userName, string password, string domain) { IntPtr tokenHandler = IntPtr.Zero; bool isValid = LogonUser(userName, domain, password, 2, 0, ref tokenHandler); return isValid; } Thanks

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  • sqlce in Xenocode

    - by jankhana
    I'm using Xenocode in my application so that it works without a .NET framework. I'm using Xenocode Virtual Application Studio(version 6.1). Everything works fine except the .sdf file which I have embedded inside the application directory. actually in the application the instead of SQL server i have used SQL Compact edition(3.5) and i have included the reqired dll . All the files are working except the ".sdf" file. Any idea y is that so? Is it because the ".sdf" file is being used when the xenocode after snapshot was taken? if so what is the solution for that? i cannot avoid using it because Xenocode's after snapshot will not recognise the application if it's not running and if I run the application ".sdf" file will be used. Anyway to solve this?

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  • sqlce in Xenocode

    - by user184204
    Please direct answers to : http://stackoverflow.com/questions/1518867/sqlce-in-xenocode This question is an accidental duplicate I'm using Xenocode in my application so that it works without a .NET framework. I'm using Xenocode Virtual Application Studio(version 6.1). Everything works fine except the .sdf file which I have embedded inside the application directory. actually in the application the instead of SQL server i have used SQL Compact edition(3.5) and i have included the reqired dll . All the files are working except the ".sdf" file. Any idea y is that so? Is it because the ".sdf" file is being used when the xenocode after snapshot was taken? if so what is the solution for that? i cannot avoid using it because Xenocode's after snapshot will not recognise the application if it's not running and if I run the application ".sdf" file will be used. Anyway to solve this?

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  • Specify JDK for Maven to use

    - by DanInDC
    Hi all. I am trying to build a Hudson plugin I've modified and it requires jdk1.6. This is fine, but I don't see how I can tell maven where the different jdk is. I've found few mentions on the internet but they don't seem to apply to me. Some suggest adding some config to .m2/settings.xml but I don't have a settings.xml. Plus, I don't want to use 1.6 for all maven builds. One kink is I am using mvn in cygwin, if that matters at all. It appears I should be able to make the specification in the project pom file, but the existing pom is pretty bare. So bottom line is, is there a way to specify a jdk for a single invocation of maven?

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  • asp.net rangevalidator for calendar extender entries gives problems in safari

    - by Robin Baralla
    Hi there, I have the following scenario: arrival and departure dates have to be selected on a form, through 2 textboxes with a calendar extender each. I validate the entries to check that no date before today is selected and to check that the departure is after the arrival. I used a rangevalidator and a comparevalidator. In IE, Firefox and Opera it is working fine, in Safari (on windows) however both the validators go off even on entries that should be accepted. It makes me suspect that the date format dd/MM/yyyy causes trouble for Safari. (the dd/MMMM/yyyy also gave the same troubles in the other browsers, probably due to the dependency on UIculture) The code is:   The range validator gets its values in code behind on Page_load RangeValidator1.MinimumValue = DateTime.Now.AddDays(1).ToShortDateString(); RangeValidator1.MaximumValue = DateTime.Now.AddMonths(12).ToShortDateString(); Does anybody have any suggestions on how to solve this problem with safari? best regards, Robin

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  • Python objects as userdata in ctypes callback functions

    - by flight
    The C function myfunc operates on a larger chunk of data. The results are returned in chunks to a callback function: int myfunc(const char *data, int (*callback)(char *result, void *userdata), void *userdata); Using ctypes, it's no big deal to call myfunc from Python code, and to have the results being returned to a Python callback function. This callback work fine. myfunc = mylib.myfunc myfunc.restype = c_int myfuncFUNCTYPE = CFUNCTYPE(STRING, c_void_p) myfunc.argtypes = [POINTER(c_char), callbackFUNCTYPE, c_void_p] def mycb(result, userdata): print result return True input="A large chunk of data." myfunc(input, myfuncFUNCTYPE(mycb), 0) But, is there any way to give a Python object (say a list) as userdata to the callback function? In order to store away the result chunks, I'd like to do e.g.: def mycb(result, userdata): userdata.append(result) userdata=[] But I have no idea how to cast the Python list to a c_void_p, so that it can be used in the call to myfunc. My current workaround is to implement a linked list as a ctypes structure, which is quite cumbersome.

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  • Eclipse + Git: Can't add files to my repository

    - by Stegeman
    I use Eclipse (Helios) with PDT and egit. I have a project without versioning, so I created a git repository for it by doing: Team -> Share Project When I try to add the files of my project to the repository: Team -> Add I get an exception: Failed to add resource to index Failed to add resource to index Exception caught during execution of add command When I add the files manually on the command line, everything is working fine. Any ideas? EDIT: The error eclipse gives is: Caused by: org.eclipse.jgit.errors.ObjectWritingException: Unable to create new object: Z:\eage_layout\.git\objects\60\f30dd232bd6ddaeb198fb11400c2613a072189 at org.eclipse.jgit.storage.file.ObjectDirectoryInserter.insert(ObjectDirectoryInserter.java:100) at org.eclipse.jgit.api.AddCommand.call(AddCommand.java:177) The code I'm running is located on a virtual machine running on CentOs. I'm working on a windows machine and using a samba share to get access to the code on the virtual machine. I've put the filesystem permissions on my .git directory to 777, but still it does not work.

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  • How to troubleshoot deallocation of object in uitableview?

    - by 4thSpace
    I have a table view with tall cells. About 300 in height. The cells are custom and have an associated nib. In cellForRowAtIndexPath, I access an object in an array using indexPath.row. The object has properties, which I assign to labels on the custom cell. This works fine for the first two cells. Once I scroll enough for the third cell to get created, the app crashes. I have NSZombieEnabled set and here is the output: 2010-04-19 21:48:13.360 MyApp[54463:207] *** -[CALayer release]: message sent to deallocated instance 0xfc4e50 (gdb) continue 2010-04-19 21:48:18.382 MyApp[54463:207] *** NSInvocation: warning: object 0xfc4e50 of class '_NSZombie_CALayer' does not implement methodSignatureForSelector: -- trouble ahead 2010-04-19 21:48:18.383 MyApp[54463:207] *** NSInvocation: warning: object 0xfc4e50 of class '_NSZombie_CALayer' does not implement doesNotRecognizeSelector: -- abort (gdb) continue Program received signal: “EXC_BAD_ACCESS”. (gdb) I'm not sure what is deallocated. How can I trace this to the source?

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  • Memory mapped files causes low physical memory

    - by harik
    I have a 2GB RAM and running a memory intensive application and going to low available physical memory state and system is not responding to user actions, like opening any application or menu invocation etc. How do I trigger or tell the system to swap the memory to pagefile and free physical memory? I'm using Windows XP. If I run the same application on 4GB RAM machine it is not the case, system response is good. After getting choked of available physical memory system automatically swaps to pagefile and free physical memory, not that bad as 2GB system. To overcome this problem (on 2GB machine) attempted to use memory mapped files for large dataset which are allocated by application. In this case virtual memory of the application(process) is fine but system cache is high and same problem as above that physical memory is less. Even though memory mapped file is not mapped to process virtual memory system cache is high. why???!!! :( Any help is appreciated. Thanks.

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