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  • Overriding Equals method in Structs

    - by devoured elysium
    I've looked for overriding guidelines for structs, but all I can find is for classes. At first I thought I wouldn't have to check to see if the passed object was null, as structs are value types and can't be null. But now that I come to think of it, as equals signature is public bool Equals(object obj) it seems there is nothing preventing the user of my struct to be trying to compare it with an arbitrary reference type. My second point concerns the casting I (think I) have to make before I compare my private fields in my struct. How am I supposed to cast the object to my struct's type? C#'s as keyword seems only suitable for reference types. Thanks

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  • Weighted random selection using Walker's Alias Method (c# implementation)

    - by Chuck Norris
    I was looking for this algorithm (algorithm which will randomly select from a list of elements where each element has different probability of being picked (weight) ) and found only python and c implementations, after I did a C# one, a bit different (but I think simpler) I thought I should share it, and ask your opinion ? this is it: using System; using System.Collections.Generic; using System.Linq; namespace ChuckNorris { class Program { static void Main(string[] args) { var oo = new Dictionary<string, int> { {"A",7}, {"B",1}, {"C",9}, {"D",8}, {"E",11}, }; var rnd = new Random(); var pick = rnd.Next(oo.Values.Sum()); var sum = 0; var res = ""; foreach (var o in oo) { sum += o.Value; if(sum >= pick) { res = o.Key; break; } } Console.WriteLine("result is "+ res); } } } if anyone can remake it in f# please post your code

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  • Rails 3 / Bundler gem: 'undefined method `setup' for Bundler:Module (NoMethodError)'

    - by ashleyw
    It can be traced back to config/boot.rb, line 7: require 'rubygems' require 'bundler' Bundler.setup This is with Bundler 0.8.1 supposedly installed: ../Users/ashley$ sudo gem install bundler Successfully installed bundler-0.8.1 1 gem installed Installing ri documentation for bundler-0.8.1... Installing RDoc documentation for bundler-0.8.1... Everything I've done has followed this guide. Anyone have any clue what's wrong? Thanks :)

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  • PHP - Alternatives to runkit for intercepting method calls

    - by Radu
    I have some very test-unfriendly code (to say the least) that I need to test. Refactoring unfortunately is not an option. I have to test the code as it is, without the possibility of changing it. To do that, I was thinking of intercepting function calls and dynamically change what they do so I can run my tests, as I need some functions and methods to return known values, and I need others that make requests, connect to the database, etc, to stop doing that and return what I need them to return. Is there any way to do this without runkit_method_redefine(), which is preferably not "EXPERIMENTAL" and still maintained? Maybe an alternative to runkit? Maybe a better way? Edit: will use PHPUnit's test doubles and PHP 5.3.2's features for making private methods accessible, if I need that functionality.

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  • jquery ajax method always returning an error?

    - by General_9
    I have the following ajax call and it always hits the error callback function every time it is called. The code in the handler is still run after the error but the success callback is never executed. What have I got wrong? $.ajax({ type: "POST", url: "Handlers/TheHandler.ashx", data: { control1: $('[id*=control1]').val(), control2: $('[id*=control2]').val(), control3: $('[id*=control3]').val(), control4: $('#control4').val(), control5: $('[id*=control5]').val(), control6: $('[id*=control6]').val() }, error: function (jqXHR, textStatus, errorThrown) { alert(jqXHR.readyState); alert(textStatus); alert(errorThrown); }, success: function (returnedValue) { alert("Got Here"); alert(returnedValue); } });

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  • UITabbleView Sections /cellForRowAtIndexPath method

    - by treasure
    hello, i have a sectioned tableview in a detailviewcontroller where i load some data in the first section. this is my code: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:CellIdentifier] autorelease]; } // For the Ingredients section, if necessary create a new cell and configure it with an additional label for the amount. Give the cell a different identifier from that used for cells in other sections so that it can be dequeued separately. if (indexPath.section == PARAMETERS_SECTION) { switch(indexPath.row) { case 0: cell.textLabel.text = @"Pili"; cell.textLabel.numberOfLines = 1; cell.textLabel.textAlignment = UITextAlignmentLeft; cell.detailTextLabel.text = entity.stid; cell.detailTextLabel.font = [UIFont boldSystemFontOfSize:12]; cell.detailTextLabel.numberOfLines = 2; break; case 1: cell.textLabel.text = @"Pele"; cell.textLabel.numberOfLines = 1; cell.textLabel.textAlignment = UITextAlignmentLeft; cell.detailTextLabel.text = entity.arec; cell.detailTextLabel.font = [UIFont boldSystemFontOfSize:11]; cell.detailTextLabel.numberOfLines = 5; break; case 2: cell.textLabel.text = @"Pale"; cell.textLabel.numberOfLines = 1; cell.textLabel.textAlignment = UITextAlignmentLeft; cell.detailTextLabel.text = entity.wer; cell.detailTextLabel.font = [UIFont boldSystemFontOfSize:11]; cell.detailTextLabel.numberOfLines = 3; break; case 3: cell.textLabel.text = @"Pole"; cell.textLabel.numberOfLines = 1; cell.textLabel.textAlignment = UITextAlignmentLeft; cell.detailTextLabel.text = entity.groid; cell.detailTextLabel.font = [UIFont boldSystemFontOfSize:11]; cell.detailTextLabel.numberOfLines = 3; break; default: break; } if (indexPath.section == NOTES_SECTION) { NSString *text = nil; text = @"User Notes"; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; cell.editingAccessoryType = UITableViewCellAccessoryNone; cell.selectionStyle = UITableViewCellSelectionStyleBlue; cell.textLabel.text = text; } if (indexPath.section == EVALUATION_SECTION) { NSString *text = nil; text = @"Evaluation"; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; cell.editingAccessoryType = UITableViewCellAccessoryNone; cell.selectionStyle = UITableViewCellSelectionStyleBlue; cell.textLabel.text = text; } if (indexPath.section == CENTERING_SECTION) { NSString *text = nil; text = @"Centering"; cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator; cell.editingAccessoryType = UITableViewCellAccessoryNone; cell.selectionStyle = UITableViewCellSelectionStyleBlue; cell.textLabel.text = text; } } return cell; } everything works ok for the first section. the rest of them seem to be "ignored" Can someone help me? thank you!

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  • ASP.NET Membership with two providers cant use GetAllUsers method

    - by Bayonian
    Hi, I'm using two membership providers. When I declared a following statement Dim allUsers As MembershipUserCollection = Membership.Providers("CustomSqlRoleManager").GetAllUsers Then, it gave me this error message. Argument not specified for paramenter 'totalRecords' of 'Public MustOverride Function GetAllUsers(pageIndex as Integer, pageSize as Integer, ByRef totalRecords as Integer) As System.Web.Security.MembershipUserCollection' Then, I added what it asked for like this : Dim allUsers As MembershipUserCollection = Membership.Providers("CustomSqlRoleManager").GetAllUsers(1, 50, 100) I don't get anything in return. I debugged it and allUsers = Nothing. What's wrong the declaration above? Do I really have to provider the paramenters when calling Membership.Providers("CustomSqlRoleManager").GetAllUsers? Update 1 If, I used the statement below: Dim allUsers As MembershipUserCollection = Membership.Providers("MembershipRoleManager").GetAllUsers(0, 0, totalUser) I got this error message: The pageSize must be greater than zero. Parameter name: pageSize. [ArgumentException: The pageSize must be greater than zero. Parameter name: pageSize] System.Web.Security.SqlMembershipProvider.GetAllUsers(Int32 pageIndex, Int32 pageSize, Int32& totalRecords) +1848357 But it works if I provied the pageSize param: Dim pageSize As Integer = GetTotalNumberOfUser() Dim allUsers As MembershipUserCollection = Membership.Providers("MembershipRoleManager").GetAllUsers(0, pageSize, totalUser) This statment Dim pageSize As Integer = GetTotalNumberOfUser() returns the total counted record, it's already round trip to database, just to get the total number of users, because I need to provide the pageSize param value.

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  • Method Cannot be reflected error

    - by acadia
    Hello, I am trying to add the web reference of a IBM FileNet WebSErvice in my .net application. The only change I did is changed the namespace in the reference from System.Web.Services.Protocols.SoapHttpClientProtocol TO Microsoft.Web.Services3.WebServicesClientProtocol After doing so, though the application is building properly. I am getting an error ExecuteChanges[webMethod] cannot be reflected. Please help

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  • Conversion of bytes into a type without changing the application (ie storing the conversion method i

    - by geoaxis
    Is there a way to store a conversion strategy (for converting some bytes) into a database and then execute it on the run time. If one were to store a complete java file, you would need to compile it, store the class and some how inject into the already running system. I am not sure how this would be possible. But using some kind of dynamic language on JVM would be nice. I see an example of execution of groovy from within spring context here http://www.devx.com/tips/Tip/42789 but this is still static in nature as application context contains the reference to the implementation and cannot be changed by database. Perhaps with JavaConfig of context it is possible. I am exploring options now, specifically with Spring 3.0. Your suggestions in any direction would be welcome.

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  • Unit testing Monorail's RenderText method

    - by MikeWyatt
    I'm doing some maintenance on an older web application written in Monorail v1.0.3. I want to unit test an action that uses RenderText(). How do I extract the content in my test? Reading from controller.Response.OutputStream doesn't work, since the response stream is either not setup properly in PrepareController(), or is closed in RenderText(). Example Action public DeleteFoo( int id ) { var success= false; var foo = Service.Get<Foo>( id ); if( foo != null && CurrentUser.IsInRole( "CanDeleteFoo" ) ) { Service.Delete<Foo>( id ); success = true; } CancelView(); RenderText( "{ success: " + success + " }" ); } Example Test (using Moq) [Test] public void DeleteFoo() { var controller = new FooController (); PrepareController ( controller ); var foo = new Foo { Id = 123 }; var mockService = new Mock < Service > (); mockService.Setup ( s => s.Get<Foo> ( foo.Id ) ).Returns ( foo ); controller.Service = mockService.Object; controller.DeleteTicket ( foo.Id ); mockService.Verify ( s => s.Delete<Foo> ( foo.Id ) ); Assert.AreEqual ( "{success:true}", GetResponse ( Response ) ); } // response.OutputStream.Seek throws an "System.ObjectDisposedException: Cannot access a closed Stream." exception private static string GetResponse( IResponse response ) { response.OutputStream.Seek ( 0, SeekOrigin.Begin ); var buffer = new byte[response.OutputStream.Length]; response.OutputStream.Read ( buffer, 0, buffer.Length ); return Encoding.ASCII.GetString ( buffer ); }

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  • NSData's writeToFile method failing with server address

    - by Ricky
    Hi. I am trying to write an NSData object to a directory like so; [myData writeToFile:[NSString stringWithFormat:@"%@/%@.txt", path, filename] atomically:YES]; I receive no errors or warnings but I am assuming the write fails because the path variable has the format of afp://10.0.0.20/username/Desktop. I am connected to the networked share. Do I need to modify the string or take a different approach here? TIA, Ricky.

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  • Cocoa contentsOfDirectoryAtPath: method failing with error for certain users - Mac OS X

    - by Patrick
    Here's a snippet of the code: // Get into the data folder of it keychainPath = [keychainPath stringByAppendingPathComponent:@"data/default"]; DLog(@"Keychain data path: %@", keychainPath); // Define Filemanager NSFileManager *fm = [NSFileManager defaultManager]; // Catch any errors NSError *dataError = nil; // get all the files in the directory NSArray *dataFiles = [fm contentsOfDirectoryAtPath:keychainPath error:&dataError]; if(!dataFiles) NSLog(@"Error: %@",dataError); Now this works perfectly fine for most people, but a few have reported problems, with the 'dataError' object giving: Error: Error Domain=NSCocoaErrorDomain Code=260 UserInfo=0x14d1fa10 "The folder “default” doesn’t exist." Underlying Error=(Error Domain=NSOSStatusErrorDomain Code=-43 "The operation couldn’t be completed. (OSStatus error -43.)" (File not found)) The people having this problem have said that the file / folder 'default' DOES exist exactly where is should be, so I have no idea why this isn't working. Any help would be appreciated!

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  • Delphi: problem with httpcli (ICS) post method

    - by www.yegorov-p.ru
    Hello I am using HttpCli component form ICS to POST a request. I use an example that comes with the component. It says: procedure TForm4.Button2Click(Sender: TObject); var Data : String; begin Data:='status=no'; HttpCli1.SendStream := TMemoryStream.Create; HttpCli1.SendStream.Write(Data[1], Length(Data)); HttpCli1.SendStream.Seek(0, 0); HttpCli1.RcvdStream := TMemoryStream.Create; HttpCli1.URL := Trim('http://server/something'); HttpCli1.PostAsync; end; But it fact, it sends not status=no but s.t.a.t.u I can't understand, where is the problem. Maybe someone can show an example, how to send POST request with the help of HttpCli component? PS I can't use Indy =)

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  • PyQt4.QtWebKit.QWebFrame missing findAllElements() method on debian

    - by user249095
    I recompiled PyQt4 from source, but the issue still exists. On another ArchLinux system, it works well. Can someone help me? Thanks! on Debian: import PyQt4.QtWebKit dir(PyQt4.QtWebKit.QWebFrame.findAllElements) Traceback (most recent call last): File "", line 1, in AttributeError: type object 'QWebFrame' has no attribute 'findAllElements' on ArchLinux: import PyQt4.QtWebKit dir(PyQt4.QtWebKit.QWebFrame.findAllElements) ['__call__', '__class__', '__cmp__', '__delattr__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__gt__', '__hash__', '__init__', '__le__', '__lt__', '__module__', '__name__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__self__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__']

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  • Registry ReadString method is not working in Windows 7 in Delphi 7

    - by Tofig Hasanov
    The following code sample used to return me windows id before, but now it doesn't work, and returns empty string, dunno why. function GetWindowsID: string; var Registry: TRegistry; str:string; begin Registry := TRegistry.Create(KEY_WRITE); try Registry.Lazywrite := false; Registry.RootKey := HKEY_LOCAL_MACHINE; // Registry.RootKey := HKEY_CURRENT_USER; if CheckForWinNT = true then Begin if not Registry.OpenKeyReadOnly('\Software\Microsoft\Windows NT\CurrentVersion') then showmessagE('cant open'); end else Registry.OpenKeyReadOnly('\Software\Microsoft\Windows\CurrentVersion'); str := Registry.ReadString('ProductId'); result:=str; Registry.CloseKey; finally Registry.Free; end; // try..finally end; Anybody can help?

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  • lubridate error message 'incompatible method's when trying date arithmetic

    - by Sharon
    I'm trying to learn lubridate. The lubridate documentation shows: date <- ceiling_date(date, "month") - days(1) [1] "2010-05-31 UTC for date arithmetic. But if I try mytoday <- now() first_of_month <- floor_date(mytoday, "month") first_of_month_last_year <- first_of_month - years(1) to use date arithmetic to get the first of the month a year earlier I get an error message Warning message: Incompatible methods ("-.POSIXt", "Ops.ordered") for "-" Any ideas what I'm doing wrong? Thanks.

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  • C# yield in nested method

    - by Fastidious
    If I step through the following code the call to ReturnOne() is skipped. static IEnumerable<int> OneThroughFive() { ReturnOne(); yield return 2; yield return 3; yield return 4; yield return 5; } static IEnumerator<int> ReturnOne() { yield return 1; } I can only assume that the compiler is stripping it out because what I'm doing is not valid. I'd like the ability to isolate my enumeration into various methods. Is this possible?

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  • Django QuerySet filter method returns multiple entries for one record

    - by Yaroslav
    Trying to retrieve blogs (see model description below) that contain entries satisfying some criteria: Blog.objects.filter(entries__title__contains='entry') The results is: [<Blog: blog1>, <Blog: blog1>] The same blog object is retrieved twice because of JOIN performed to filter objects on related model. What is the right syntax for filtering only unique objects? Data model: class Blog(models.Model): name = models.CharField(max_length=100) def __unicode__(self): return self.name class Entry(models.Model): title = models.CharField(max_length=100) blog = models.ForeignKey(Blog, related_name='entries') def __unicode__(self): return self.title Sample data: b1 = Blog.objects.create(name='blog1') e1 = Entry.objects.create(title='entry 1', blog=b1) e1 = Entry.objects.create(title='entry 2', blog=b1)

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  • Method to capture a screenshot of user's browser to aid in bug reporting

    - by Buzz
    I'm looking for a way to make it easy for technically unsophisticated users to submit screenshots of their browser to me, to aid in debugging web application problems. There will be a button on all pages inside a web application they can use to report problems, which I would like to submit a screenshot (among other things). http://www.snapabug.com/ is very close to what I want, but I need to be able to customize a few things that service won't let me. Production environment is LAMP. I expect there must be something Flash-based that can do this, but I've not been able to find something. Thanks!

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  • django deleting models and overriding delete method

    - by Mike
    I have 2 models class Vhost(models.Model): dns = models.ForeignKey(DNS) user = models.ForeignKey(User) extra = models.TextField() class ApplicationInstalled(models.Model): user = models.ForeignKey(User) added = models.DateTimeField(auto_now_add=True) app = models.ForeignKey(Application) ver = models.ForeignKey(ApplicationVersion) vhost = models.ForeignKey(Vhost) path = models.CharField(max_length=100, default="/") def delete(self): # # remove the files # print "need to remove some files" super(ApplicationInstalled, self).delete() If I do the following >>> vhost = Vhost.objects.get(id=10) >>> vhost.id 10L >>> ApplicationInstalled.objects.filter(vhost=vhost) [<ApplicationInstalled: http://wiki.jy.com/>] >>> vhost.delete() >>> ApplicationInstalled.objects.filter(vhost=vhost) [] As you can see there is an applicationinstalled object linked to vhost but when I delete the vhost, the applicationinstalled object is gone but the print never gets called. Any easy way to do this without iterating through the objects in the vhost delete?

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  • "The image <name> cannot be displayed because it contains errors" when using pchart Render method

    - by christophe-milard
    Hi, I am trying to use the pchart package (over php) to build (and directly display) graphs/charts. At this time, I am just trying to run their provided example (Example1.php), where I just have replaced the final: $Test-Render("example1.png"); by $Test-Stroke(); But When I do this, I get:" The image cannot be displayed because it contains errors" on the browser. If I leave the original "$Test-Render(...)" the generated image is OK. (but not sent) I have read that there is (was?) an issue with mozilla/Firefox browsers regarding images being required twice and the REFER URL, but when I browse at the pchart home page, I can use their "sanboxes" and get the result of my tests directly displayed on my browser (http://pchart.sourceforge.net/demo.php). ... So their must be a way (or a nice work around) to send the generated graphs directely to the browser successfuly. If your answer is to generate the image (i.e. use Render) and then send it afterwards, please but accurate on how to do this (how do I destroy the generated files automaticaly, permissions...) I am new to this, sorry advance if it's obvious...;-)

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  • Fastest way to call a COM objects method without using a RCW

    - by Nathan W
    I'm trying to find the cleanest and fastest way for calling a COM objects methods. I was using a RCW for the object but every time a new version of the third party COM object comes out its GUID changes which then renders the RCW useless, so I had to change and start using Type mytype = Type.GetTypeFromProgID("MyCOMApp.Application"); so that every time a new version of the COM object comes out I don't have to recomplie and redeploy my app. At the moment I am using refelection like mytype.InvokeMemeber but I feel it is so slow compared to just calling the RCW. How does everyone else tackle the problem of changing 3rd party COM object versions, but still maintaining the speed of a RCW?

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