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• How to send a signal SIGINT from script to script ? BASH

  - by debugger

  I want to trap a signal send from Script-A.sh to Script-B.sh so in Script-A.sh i use the command (Send SIGINT to Script-B.sh) kill -2 $PID_Script-B.sh And in Script-B.sh i catch the signal and call function Clean trap 'Clean' 2 It does not work, instead the Script-B.sh is killed right away without performing the Clean !! What i notice also is that if i want to send SIGINT from terminal to any script that traps it, a ctrl-c will be catched correctly, but not if i specify the signal via the command kill -2 $pid_of_script Any idea about the difference between the two method to send the SIGINT (ctrl-c VS kill -2 $pid_of_script), and how i can send a SIGINT from a script to another ? Regards, Debugger

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• How to set AeDebug to get a minidump with the name of the process ?

  - by JC Martin

  I have to perform some post mortem debugging on a C++ project. Known way to perform is to set the cdb debugger as a minidump generator and to process the dumps collects afterwards. I read nearly the whole web and I didn't find a solution to produce a minidump with the name of the process that has crashed Is there a way to set AeDebug\Debugger registry variable in such a manner that cdb generates a dump file with the name of the process ? When I encapsulate the call to cdb.exe in a batch file, it starts well but stays blocked on the symbol searching. I must perform a Ctrl+C in order to stop the batch, then the minidump, with the correct process name, is created... but of course I can't set up such a thing in an unattended production environment... Has anybody done that before ?

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• struct method linking

  - by James

  I'm updating some old code that has several POD structs that were getting zero'd out by memset (don't blame me...I didn't write this part). Part of the update changed some of them to classes that use private internal pointers that are now getting wiped out by the memset. So I added a [non-virtual] reset() method to the various structs and refactored the code to call that instead. One particular struct developed an "undefined reference to `blah::reset()'" error. Changing it from a struct to a class fixed the error. Calling nm on the .o file h, the mangled function names for that method look the same (whether it's a class or a struct). I'm using g++ 4.4.1, on Ubuntu. I hate the thought that this might be a compiler/linker bug, but I'm not sure what else it could be. Am I missing some fundamental difference between structs and classes? I thought the only meaningful ones were the public/private defaults and the way everyone thinks about them.

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• C# Is it possible to interrupt a specific thread inside a ThreadPool?

  - by Lirik

  Suppose that I've queued a work item in a ThreadPool, but the work item blocks if there is no data to process (reading from a BlockingQueue). If the queue is empty and there will be no more work going into the queue, then I must call the Thread.Interrupt method if I want to interrupt the blocking task, but how does one do the same thing with a ThreadPool? The code might look like this: void Run() { try { while(true) { blockingQueue.Dequeue(); doSomething(); } } finally { countDownLatch.Signal(); } } I'm aware that the best thing to do in this situation is use a regular Thread, but I'm wondering if there is a ThreadPool equivalent way to interrupt a work item.

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• PHP's apache_setenv function causes 500 Internal Server Error

  - by guitar-

  apache_setenv ( 'no-gzip', 1 ) I'm trying to disable gzip for a certain page's output, but only that page. This works fine on testing servers, but not the production server, which is running the same thing (CentOS and Apache), works on Ubuntu though. Anyway, do you know why? Or is there some other alternative? I was thinking of using ob_start () to put all output in a buffer, and then unzip it myself with a PHP function then call ob_end_flush ()... or would it not be gzipped until right before Apache sends it to the client? Thanks for any help.

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• Can't find applicationSupportDirectory?

  - by Frost Li

  There is always a pre-written function at AppDelegate: (NSString *)applicationSupportDirectory { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES); NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : NSTemporaryDirectory(); return [basePath stringByAppendingPathComponent:@"SyncFile"]; } However, I can't call this method outside this class: id _appDelegate = (SyncFile_AppDelegate *)[[NSApplication sharedApplication] delegate]; NSLog(@"%@", [_appDelegate applicationSupportDirectory]); The compiler warned me that it can't find method applicationSupportDirectory... Does anyone know what's wrong with my code? Thank you very much!

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• How to replace html element with ajax response?

  - by user2885137

  How do I replace the html element from ajax response? What I know to is to remove the element, how do I replace that removed tag with ajax response? For example: I have code like this: <ul id="products"> ............... </ul> When I click on a button the ajax call is made to codeginter controller where I recieve the new data pulled from the database and rendered in another view which starts from ul and ends at closing ul. In ajax success function I do this: $('#products').remove(); //What to do now here to replace the removed portion with response of ajax?

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• actionscript calling javascript with Security Exception

  - by Jeffrey Chee

  I have a swf hosted at domain A, and I have a html at domain B My swf is able to be loaded from accessing the html at domain B. However, the swf gets a SecurityError: Error #2060: Security sandbox violation: ExternalInterface caller http://domainA.com/TrialApp.swf cannot access http://DomainB.com/. The as3 is just the below: ExternalInterface.call("javascript:_invite();"); I've also loaded the crossdomain policy file from Domain B during initialization. Security.loadPolicyFile( "http://DomainB/crossdomain.xml" ); How do I go about solving this? in my html, I have allowscriptaccess='always' Thanks in Advance

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• Dictionary with delegate or switch?

  - by Samvel Siradeghyan

  Hi, I am writing a parser, which call some functions dependent on some value. I can implement this logic with simple switch like this switch(some_val) { case 0: func0(); break; case 1: func1(); break; } or with delegates and dictionary like this delegate void some_delegate(); Dictionary<int, some_delegate> some_dictionary = new Dictionary<int, some_delegate>(); some_dictionary[0] = func0; some_dictionary[1] = func1; some_dictionary[some_value].Invoke(); Are this two methods equal and which is preferred? Thanks.

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• What is the best way to read the uploaded files from Request.Files, StreamReader or BinaryReader or

  - by ramesh.nagul

  I have a form where the user can upload multiple files. I am using MVC 2.0 and in my controller I need to call a webservice that is a common import interface requires the files to passed in as byte[]. .NET exposes Request.Files as a HttpFileCollectionBase and I access the filehandle using HttpPostedFile or HttpPostedFileBase that provides access to the Stream member. What is the best way for me to read the bytes from the stream? BinaryReader? StreamReader? BufferedStream?

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• Developing Mobile App (Iphone,Blackberry,Android) for an existing website

  - by soodos

  Hey Guys I have a website and am planning to develop a mobile version of it for the iphone, blackberry and android. My website is a social network built on PHP Zend framework. Now all these mobile apps are going to be having the same functionality like the website. I am little ignorant about this - but from a high level I understand that all these mobile apps should not have to write any backend logic. For every functionality - they will simply make a web service API call to interact with the backend. So does that mean, for every functionality I need to create a web service method. Can the existing code be re used - I'm a little lost - Can someone shed some light on this matter or point me in the right direction (like some articles) Thanks

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• Freemarker template not found

  - by brock

  Hi, I'm currently trying to get Freemarker to work with my application using Spring. No matter what I try I keep getting template not found. I am not sure if I have the configuration set up properly, but it never finds my template. Here is my spring bean config: <bean id="freemarkerConfig" class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer"> <property name="templateLoaderPath" value="/WEB-INF/freemarker/"/> </bean> Whenever I try to call getTemplate on the freemaker configuration it always sends back a template not found error. So if I do configuration.getTemplate("testTemplate.ftl") it always throws an IOException. I'm not sure if anyone has an idea of what I'm doing wrong. Thanks for all your help!

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• How to compile scheme into native binary files ?

  - by Joe

  I am very new to scheme. And now I am trying to compile some scheme code into binary file which will be loaded faster into interpreter. (The interpreter is a hybrid interpreter)Some one told me that I can compile the code into native binary file and then load it into interperter. And my question is: 1. What is the native binary file? 2. How can I compile the scheme code into a native binary file? 3. How can I load native bianry file into scheme interpreter? Thanks in advance. Joe Suggested that I want to compile below code into native binary file: (define test (lambda() (display "this is a test")) And then load the bianry file into interpreter and call the function "test".

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• ASP.NET MVC 2 RC 2 returns Area-specific controller when no area specified

  - by Bryan

  I have a basic MVC 2 (RC2) site with one base-level controller ("Home"), and one area ("Admin") with one controller ("Abstract"). When i call http://website/Abstract - the Abstract controller in the Admin area gets called even though i haven't specified the Area in the URL. To make matters worse - it doesn't seem to know it's under Admin because it can't find the associated view and just returns: The view 'Index' or its master was not found. The following locations were searched: ~/Views/Abstract/Index.aspx ~/Views/Abstract/Index.ascx ~/Views/Shared/Index.aspx ~/Views/Shared/Index.ascx Am i doing something wrong? Is this a bug? A feature?

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• OpenLayers: Raise event when map is zoomed or moved by user

  - by David Pfeffer

  I'm using OpenLayers to display OpenStreetMap maps. (Though, I'd assume this should be general enough to work for any map product...) I'm displaying some very sophisticated vector overlays, and the amount and resolution of the features I'm returning from the server via GeoJSON to overlay has proven too much for many computers. What I'd like to do now instead is to only send data befitting the resolution of the current zoom, and fitting the current view port. This should be relatively easy to do using the GetResolution and CalculateBounds methods on the Map object. However, I don't know when to call these methods because I can't find a way to register a function to be called when the user pans the map (changing the view port) or zooms the map (changing the resolution and view port). How can I get a callback when the user pans or zooms the map?

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• Csharp component which generates fragmens with highlights for diffs for 2 strings

  - by MicMit

  I need C# equivalent ( ideally open source ) which is similar to Delphi DLL. I am currently using the wrapper ( C# syntax is provided , but it is a call from a different language ) zdiff( string ref str1, string ref str2, int range , int trim ) it calls inside str1 = GetHiDiff(@str1,1,trim) str2 = GetHiDiff(@str1,2,trim) where function GetHiDiff(s:pchar; sIndex:integer; wtrim:integer): pchar; stdcall; What it does it returns a left fragment html of str1 and a right html fragment of str2 with diffs highlighted as strings are passed by reference. Range parameter determines the size of html fragment. Not sure what trim 0 does.

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• Google App Engine - Calling getSession().invalidate(); causes app engine to act weird.

  - by Spines

  When I call hreq.getSession().invalidate(); app engine slows down tremendously. I looked at appstats and saw that on a page where no database calls are made, it was calling memcache.get and datastore.get 23 times each. The stack trace of these calls showed that it was being called from getSession(). This only happens on the production server. Every time I make a request to a page, it makes a bunch of memcache and datastore calls. This slow down goes away though when i restart my browser. When I changed the code to simply set the isLoggedIn property of the session to false, rather than calling hreq.getSession().invalidate();, everything was fine. As a test, I didn't invalidate my session, but I changed the value of my browser's session cookie, and the app engine exhibited the same behavior. Is this a bug with the app engine?

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• Get Angle to Tangent that Intersects Point

  - by Christian Stewart

  I have a circle around a given point, call this point (x1, y1). I know the radius of the circle around this point. I also have a second point (x2, y2), that is a distance away, outside the radius of the circle. I need a algebraic way through code to calculate the heading (angle from vertical) needed to intersect the circle at 90* to the center point (I.E. get the angle of the tangent intersecting line 2) around the point (x1, y1) from the second point (x2, y2) A bit of background: Essentially the two points are GPS coordinates on a 2D map, I need to know the target heading to intersect the circle in order to follow its path around the center point. Thanks! Christian

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• Why does my Perl program print the help message when an arguments has 0 as a value?

  - by David

  If i do this: GetOptions( 'u=s' => \$in_username, 'r=i' => \$in_readonly, 'b=i' => \$in_backup ); exit usage() unless $in_username && $in_readonly && $in_backup; and call the program like this: ./app.pl -u david -r 12 -b 0 it always results in calling usage(), so obviously the 0 is not seen as an integer value. What can i do accept integer values AND 0?

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• Java basic authorization with URLConnection

  - by zigomir

  Hello! I'm opening a connection to WebService with an URLConnection class. I also set request property for basic authorization like this: c.setRequestProperty("Authorization", "Basic " + usernameAndPasswordEncoded); Where c is an object of type URLConnection. So this is client side of WebService call. Now on server side I need to get username from session: User user = (User) request.getSession().getAttribute("user"); But this won't get an username. Also if I look through debug mode, I see an anonymous userName in HttpSession object. What to do to solve this problem, so that username is sent through client to WebService server for authorization? Thanks everyone!

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• Ninject with MembershipProvider | RoleProvider

  - by DVark

  I'm using ninject as my IoC and I wrote a role provider as follows: public class BasicRoleProvider : RoleProvider { private IAuthenticationService authenticationService; public BasicRoleProvider(IAuthenticationService authenticationService) { if (authenticationService == null) throw new ArgumentNullException("authenticationService"); this.authenticationService = authenticationService; } /* Other methods here */ } I read that Provider classes get instantiated before ninject gets to inject the instance. How do I go around this? I currently have this ninject code: Bind<RoleProvider>().To<BasicRoleProvider>().InRequestScope(); From this answer here. If you mark your dependencies with [Inject] for your properties in your provider class, you can call kernel.Inject(MemberShip.Provider) - this will assign all dependencies to your properties. I do not understand this.

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• Can I check wheter Linq 2 SQL's DataContext is tracking entities?

  - by Thomas Jespersen

  We want to throw an exception, if a user calls DataContext.SubmitChanges() and the DataContext is not tracking anything. That is... it is OK to call SubmitChanges if there are no inserts, updates or deletes. But we want to ensure that the developer didn't forget to attach the entity to the DataContext. Even better... is it possible to get a collection of all entities that the DataContext is tracking (including those that are not changed)? PS: The last question I asked were answered with: "do it this way instead"... please don't :-)

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• How to limit NSTextField text length and keep it always upper case?

  - by carlosb

  Need to have an NSTextField with a text limit of 4 characters maximum and show always in upper case but can't figure out a good way of achieving that. I've tried to do it through a binding with a validation method but the validation only gets called when the control loses first responder and that's no good. Temporarly I made it work by observing the notification NSControlTextDidChangeNotification on the text field and having it call the method: - (void)textDidChange:(NSNotification*)notification { NSTextField* textField = [notification object]; NSString* value = [textField stringValue]; if ([value length] > 4) { [textField setStringValue:[[value uppercaseString] substringWithRange:NSMakeRange(0, 4)]]; } else { [textField setStringValue:[value uppercaseString]]; } } But this surely isn't the best way of doing it. Any better suggestion?

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• In Django how display all of the values aftere the for loop is finished instead of displaying them one by one

  - by Igor

  Hello, In my django project in the view I call the last 6 values in the column and send them to the template. I then would like to pass into google charts api those 6 values and have a graph. At the moment for some reason I get 6 different graphs. {% for foodbag in foodbags %} <img src="http://chart.apis.google.com/chart?chxl=0:|0|1|2|3|4|5|6&chxr=2,0,0&chxs=0,1,676767,10.5,1,l,676767|2,676767,5.5,0,l,676767&chxt=x,y&chs=300x170&cht=bvg&chco=76A4FB&chd=t:{{foodbag.12}},0&chma=0,5|5,5&chdlp=t&chtt=Food+Bags"/> {% endfor %} I'm not sure how to replace string chd=t:{{foodbag.12}}, with the 6 values I am trying to extract from foodbags. I would really appreciate the help. Thank you

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• Calling function from popover.

  - by user288225

  Alright, so I made a popover from my main view and all that good stuff. But I want to have my popover call an action in my main view when a button within the popover is pressed. MainView *mainView = [[MainView alloc] initWithNibName:@"MainView" bundle:nil]; [mainView doStuff]; The "dostuff" function changes some elements within the view. For example, the color of the toolbar is supposed to be changed. I've put a print command and the print command executes. But for some reason, the toolbar won't change color. I've imported the header of MainView into the popover. I did an @class thingy for MainView in my popover. doStuff is declared in MainView's header. The IBOutlets are declared too, and connected. Any ideas?

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