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• How do I write data in my Google App Engine Datastore to com.google.appengine.api.datastore.Text

  - by Lloyd

  I have persistent object, with a string property that often is over 500 charachters. Google App Engine says I need to save it as a com.google.appengine.api.datastore.Text. How do I either convert a String type to a com.google.appengine.api.datastore.Text type so I can use a setMethod() on the property, or otherwise get my long sting data into that persistent value?

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• Refactor instance declaration from try block to above try block in a method

  - by dotnetdev

  Hi, Often I find myself coming across code like this: try { StreamWriter strw = new StreamWriter(); } However, there is no reference to the object outside the scope of the try block. How could I refactor (extract to field in Visual Studio says there is no field or something) the statement in the try block so that it is declared above the try block so I can use it anywhere in the method? Thanks

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• iPhone scrollView won't scroll after keyboard is closed

  - by Rob

  I was trying to implement a way to have the UITextField move up when the keyboard opened so that the user could see what they were typing but after implementing the code - it locks my scroll. The view will scroll when the user first gets to that view but after inputting text and closing the keyboard it locks the view. I suspect that it is a problem somewhere in this code: - (void) viewWillAppear:(BOOL)animated { [super viewWillAppear:animated]; NSLog(@"Registering for keyboard events"); // Register for the events [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector (keyboardDidShow:) name: UIKeyboardDidShowNotification object:nil]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector (keyboardDidHide:) name: UIKeyboardDidHideNotification object:nil]; // Setup content size scrollView.contentSize = CGSizeMake(SCROLLVIEW_CONTENT_WIDTH, SCROLLVIEW_CONTENT_HEIGHT); //Initially the keyboard is hidden keyboardVisible = NO; } -(void) viewWillDisappear:(BOOL)animated { NSLog (@"Unregister for keyboard events"); [[NSNotificationCenter defaultCenter] removeObserver:self]; } //**-------------------------------** - (void) keyboardDidShow: (NSNotification *)notif { NSLog(@"Keyboard is visible"); // If keyboard is visible, return if (keyboardVisible) { NSLog(@"Keyboard is already visible. Ignore notification."); return; } // Get the size of the keyboard. NSDictionary* info = [notif userInfo]; NSValue* aValue = [info objectForKey:UIKeyboardBoundsUserInfoKey]; CGSize keyboardSize = [aValue CGRectValue].size; // Save the current location so we can restore // when keyboard is dismissed offset = scrollView.contentOffset; // Resize the scroll view to make room for the keyboard CGRect viewFrame = scrollView.frame; viewFrame.size.height -= keyboardSize.height; scrollView.frame = viewFrame; CGRect textFieldRect = [activeField frame]; textFieldRect.origin.y += 10; [scrollView scrollRectToVisible:textFieldRect animated:YES]; NSLog(@"ao fim"); // Keyboard is now visible keyboardVisible = YES; } -(void) keyboardDidHide: (NSNotification *)notif { // Is the keyboard already shown if (!keyboardVisible) { NSLog(@"Keyboard is already hidden. Ignore notification."); return; } // Reset the frame scroll view to its original value scrollView.frame = CGRectMake(0, 0, SCROLLVIEW_CONTENT_WIDTH, SCROLLVIEW_CONTENT_HEIGHT); // Reset the scrollview to previous location scrollView.contentOffset = offset; // Keyboard is no longer visible keyboardVisible = NO; } -(BOOL) textFieldShouldBeginEditing:(UITextField*)textField { activeField = textField; return YES; } I defined the size above the #imports as: #define SCROLLVIEW_CONTENT_HEIGHT 1000 #define SCROLLVIEW_CONTENT_WIDTH 320 Really not sure what the issue is.

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• Python Code Introspection and Analysis

  - by oneself

  Hi, I am trying to write a Python code analyzer, and I am trying to avoid having to parse bare Python text files. I was hoping that once the Python compiler/interpreter parses the code there's a way to get to the object code or parse tree from within a running Python program. Is there anyway to do this? Thank you

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• copy array from one class to another class array

  - by shishir.bobby

  hi all, i hv an array ("array A", which contains 3 objects, fox ex, to,from,message) in class "A". and in class "B",i m having another array ("array B"),which fills tableview,of class "B" only. i need to fill tableview,with the values of class A's array (i.e array A,with the object values, to,from,message). how can i do it?? how to copy array from another class ? i hope i m clear with my question regards shishir

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• handling NSStream events when using EASession in MonoTouch

  - by scotru

  Does anyone have an example of how to handle read and write NSStream events in Monotouch when working with accessories via EASession? It looks like there isn't a strongly typed delegate for this and I'm having trouble figuring out what selectors I need to handle on the delegates of my InputStream and OutputStream and what I actually need to do with each selector in order to properly fill and empty the buffers belonging to the EASession object. Basically, I'm trying to port Apple's EADemo app to Monotouch right now. Here's the Objective-C source that I think is relevant to this problem: / / asynchronous NSStream handleEvent method - (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode { switch (eventCode) { case NSStreamEventNone: break; case NSStreamEventOpenCompleted: break; case NSStreamEventHasBytesAvailable: [self _readData]; break; case NSStreamEventHasSpaceAvailable: [self _writeData]; break; case NSStreamEventErrorOccurred: break; case NSStreamEventEndEncountered: break; default: break; } } / low level write method - write data to the accessory while there is space available and data to write - (void)_writeData { while (([[_session outputStream] hasSpaceAvailable]) && ([_writeData length] > 0)) { NSInteger bytesWritten = [[_session outputStream] write:[_writeData bytes] maxLength:[_writeData length]]; if (bytesWritten == -1) { NSLog(@"write error"); break; } else if (bytesWritten > 0) { [_writeData replaceBytesInRange:NSMakeRange(0, bytesWritten) withBytes:NULL length:0]; } } } // low level read method - read data while there is data and space available in the input buffer - (void)_readData { #define EAD_INPUT_BUFFER_SIZE 128 uint8_t buf[EAD_INPUT_BUFFER_SIZE]; while ([[_session inputStream] hasBytesAvailable]) { NSInteger bytesRead = [[_session inputStream] read:buf maxLength:EAD_INPUT_BUFFER_SIZE]; if (_readData == nil) { _readData = [[NSMutableData alloc] init]; } [_readData appendBytes:(void *)buf length:bytesRead]; //NSLog(@"read %d bytes from input stream", bytesRead); } [[NSNotificationCenter defaultCenter] postNotificationName:EADSessionDataReceivedNotification object:self userInfo:nil]; } I'd also appreciate any architectural recommendations on how to best implement this in monotouch. For example, in the Objective C implementation these functions are not contained in any class--but in Monotouch would it make sense to make them members of my

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• Good PHP ORM Library?

  - by sgibbons

  Does anyone know of a good object-relational-mapping library for PHP? I know of PDO/ADO, but they seem to only provide abstraction of differences between database vendors not an actual mapping between the domain model and the relational model. I'm looking for a PHP library that functions similarly to the way Hibernate does for Java/.Net.

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• If I'm updating a DataRow, do I lock the entire DataTable or just the DataRow?

  - by Dan Tao

  Suppose I'm accessing a DataTable from multiple threads. If I want to access a particular row, I suspect I need to lock that operation (I could be mistaken about this, but at least I know this way I'm safe): // this is a strongly-typed table OrdersRow row = null; lock (orderTable.Rows.SyncRoot) { row = orderTable.FindByOrderId(myOrderId); } But then, if I want to update that row, should I lock the table (or rather, the table's Rows.SyncRoot object) again, or can I simply lock the row?

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• Python double underscore mangling

  - by gnr

  I am a bit confused by this behavior (using python 3.2): class Bar: pass class Foo: def __init__(self): self.__cache = None bar = Bar() bar.__cache = None foo = Foo() print(vars(bar)) #returns {'__cache': None} print(vars(foo)) #returns {'_Foo__cache': None} I've read up a bit on how double-underscores cause attribute names to be "mangled", but I would have expected the same name-mangling in both cases above. The meaning of a single- and a double-underscore before an object name in Python Any ideas what's going on here?

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• Simplejson dumps char \

  - by Monty

  Hi! Im programming with django and i need to serialize an object to a string, but i need to get the string \/ serialized. An example: simplejson.dumps({'id' : 'root\/leaf'}) I need an output like this: '{"id": "root\/leaf"}' but i get this: '{"id": "root\\\\leaf"}' Thank you!! PD: Sorry for my english :-P

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• Criteria SpatialRestrictions.IsWithinDistance NHibernate.Spatial

  - by idjones82

  Has anyone implemented this, or know if it would be difficult to implement this/have any pointers? public static SpatialRelationCriterion IsWithinDistance(string propertyName, object anotherGeometry, double distance) { // TODO: Implement throw new NotImplementedException(); } from NHibernate.Spatial.Criterion.SpatialRestrictions I can use "where NHSP.Distance(PROPERTY, :point)" in hql. But want to combine this query with my existing Criteria query. for the moment I'm creating a rough polygon, and using criteria.Add(SpatialRestrictions.Intersects("PROPERTY", myPolygon));

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• How to use POWERSHELL to set MimeTypes in an IIS6 website?

  - by jacko

  I want to be able to replicate this adsutil.vbs behaviour in powershell: cscript adsutil.vbs set W3SVC/$(ProjectWebSiteIdentifier)/MimeMap ".pdf,application/pdf" and I've gotten as far as getting the website object: $website = gwmi -namespace "root\MicrosoftIISv2" -class "IISWebServerSetting" -filter "ServerComment like '%$name%'" if (!($website -eq $NULL)) { #add some mimetype } and listing out the MimeMap collection: ([adsi]"IIS://localhost/MimeMap").MimeMap Anyone know how to fill in the blanks so that I can add mimetypes to an exiting IIS6 website???

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• What makes Ometa special?

  - by Brian

  Ometa is "a new object-oriented language for pattern matching." I've encountered pattern matching in languages like Oz tools to parse grammars like Lexx/Yacc or Pyparsing before. Despite looking at example code, reading discussions, and talking to a friend, I still am not able to get a real understanding of what makes Ometa special (or at least, why some people think it is). Any explanation?

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• What are 'len', 'dir', 'vars' named?

  - by johannix

  I was wondering what language to use when talking about a function that takes in a specific object, acts on it and returns something else. Clearly they're functions, but I was wondering if there's a more specific term. A couple examples of Python built-in functions that fit this spec are: 'len', 'dir', 'vars' I thought it was 'predicate', but apparently that's specific to functions that return a boolean value.

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• querying nested array elements in C#

  - by the berserker

  I have following object structure, deseralized from XML (WS): <ns2:Category> <ns2:CategoryId>800003</ns2:CategoryId> <ns2:CategoryName>Name1</ns2:CategoryName> <ns2:Categories> <ns2:Category> <ns2:CategoryId>800008</ns2:CategoryId> <ns2:CategoryName>Name2</ns2:CategoryName> <ns2:Categories> <ns2:Category> <ns2:CategoryId>800018</ns2:CategoryId> <ns2:CategoryName>Name3</ns2:CategoryName> <ns2:Categories/> </ns2:Category> <ns2:Category> <ns2:CategoryId>800028</ns2:CategoryId> <ns2:CategoryName>Name4</ns2:CategoryName> <ns2:Categories/> </ns2:Category> </ns2:Categories> </ns2:Category> <ns2:Category> <ns2:CategoryId>800009</ns2:CategoryId> <ns2:CategoryName>Name5</ns2:CategoryName> <ns2:Categories> <ns2:Category> <ns2:CategoryId>800019</ns2:CategoryId> <ns2:CategoryName>Name6</ns2:CategoryName> <ns2:Categories> <ns2:Category> <ns2:CategoryId>800119</ns2:CategoryId> <ns2:CategoryName>Name7</ns2:CategoryName> <ns2:Categories/> </ns2:Category> <ns2:Category> <ns2:CategoryId>800219</ns2:CategoryId> <ns2:CategoryName>Name111</ns2:CategoryName> <ns2:Categories/> </ns2:Category> </ns2:Categories> </ns2:Category> </ns2:Categories> </ns2:Category> </ns2:Categories> </ns2:Category> How would I find Category object with CategoryId 800119 efficiently? So, Im looking for something like FindCategory(long categoryId) - Prefferably with LINQ to objects. Any other option?

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• How does a portable Thread Specific Storage Mechanism's Naming Scheme Generate Thread Relative Uniqu

  - by Hassan Syed

  A portable thread specific storage reference/identity mechanism, of which boost/thread/tss.hpp is an instance, needs a way to generate a unique keys for itself. This key is unique in the scope of a thread, and is subsequently used to retrieve the object it references. This mechanism is used in code written in a thread neutral manner. Since boost is a portable example of this concept, how specifically does such a mechanism work ?

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• When to call release on NSURLConnection delegate?

  - by Kieran H

  Hi, When passing a delegate to the a NSUrlConnection object like so: [[NSURLConnection alloc] initWithRequest:request delegate:handler]; when should you call release on the delegate? Should it be in connectionDidFinishLoading? If so, I keep getting exec_bad_access. I'm seeing that my delegates are leaking through instruments. Thanks

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• Python enumerate built-in error when using the start parameter

  - by TheJuice

  I'm modifying some code that calls enumerate on a list declared via a list comprehension e.g. self.groups = [Groups(self, idx) for idx in range(n_groups)] then later: for idx, group in enumerate(self.groups): # do some stuff but when I change the enumerate call to start at the 2nd list element via the start parameter e.g. for idx, group in enumerate(self.groups[1]): I get an exception: exceptions.TypeError: 'Group' object is not iterable Could someone explain why this is?

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• Class generation on the fly

  - by James P.

  Is it possible to generate subclasses at runtime or while an application is running? If so, how is this achieved and what precautions should be taken to prevent a rogue object wreaking havoc inside an application?

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• Eval ID on radiobutton in Datalist

  - by ravi

  my code gota datalist with radio button and iv made it single selectable onitemdatabound....now im trying to evaluate a hiddenfield on basis of selected radio button my code goes like this aspx code <asp:DataList ID="DataList1" runat="server" RepeatColumns = "4" CssClass="datalist1" RepeatLayout = "Table" OnItemDataBound="SOMENAMEItemBound" CellSpacing="20" onselectedindexchanged="DataList1_SelectedIndexChanged"> <ItemTemplate> <br /> <table cellpadding = "5px" cellspacing = "0" class="dlTable"> <tr> <td align="center"> <a href="<%#Eval("FilePath")%>" target="_blank"><asp:Image ID="Image1" runat="server" CssClass="imu" ImageUrl = '<%# Eval("FilePath")%>' Width = "100px" Height = "100px" style ="cursor:pointer" /> </td> </tr> <tr > <td align="center"> <asp:RadioButton ID="rdb" runat="server" OnCheckedChanged="rdb_click" AutoPostBack="True" /> <asp:HiddenField ID="HiddenField1" runat="server" Value = '<%#Eval("ID")%>' /> </td> </tr> </table> </ItemTemplate> </asp:DataList> code behind protected void SOMENAMEItemBound(object sender, DataListItemEventArgs e) { RadioButton rdb; rdb = (RadioButton)e.Item.FindControl("rdb"); if (rdb != null) rdb.Attributes.Add("onclick", "CheckOnes(this);"); } protected void rdb_click(object sender, EventArgs e) { for (int i = 0; i < DataList1.Items.Count; i++) { RadioButton rdb; rdb = (RadioButton)DataList1.Items[i].FindControl("rdb"); if (rdb != null) { if (rdb.Checked) { HiddenField hf = (HiddenField)DataList1.Items[i].FindControl("HiddenField1"); Response.Write(hf.Value); } } } } the javascript im using... function CheckOnes(spanChk){ var oItem = spanChk.children; var theBox= (spanChk.type=="radio") ? spanChk : spanChk.children.item[0]; xState=theBox.unchecked; elm=theBox.form.elements; for(i=0;i<elm.length;i++) if(elm[i].type=="radio" && elm[i].id!=theBox.id) { elm[i].checked=xState; } } iam getting an error like this Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled. Details: Error parsing near 'pload Demonstration|'. is there any other way to do this or can nyone plz help to get rid of this problem

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• Can someone explain C# CngKey.Create please?

  - by Matt W

  The internet resources seem few and far between and the best MSDN page (as far as I could tell) throws an error! Specifically, I'm not sure what to create as a CngKeyCreationParameters object... Thanks, Matt.

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• How do I eliminate TT's "Wide character in print" warning ?

  - by planetp

  I have this warning every time I run my CGI-script (output is rendered by Template::Toolkit): Wide character in print at /usr/local/lib/perl5/site_perl/5.8.9/mach/Template.pm line 163. What's the right way to eliminate it? I create the tt object using this config: my %config = ( ENCODING => 'utf8', INCLUDE_PATH => $ENV{TEMPLATES_DIR}, EVAL_PERL => 1, } my $tt = Template->new(\%config);

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• CBlobResult gives pains.... using Visual C++ 2008... opencv

  - by kaushalyjain

  When I type the following code line.. where img_hsv is a Mat image... IplImage abc=img_hsv; // object that will contain blobs of inputImage CBlobResult blobs; // Extract the blobs using a threshold of 100 in the image blobs = CBlobResult(&abc,NULL,100,true); It displays the following error... error C2661: 'CBlobResult::CBlobResult' : no overloaded function takes 4 arguments.. Any help is welcome...!!

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• Updating with Related Entities - Entity Framework v4

  - by Vincent BOUZON

  Hi, I use Entity Framework V4 and i want to update Customer who have Visits. My code : EntityKey key; object originalItem; key = this._modelContainer.CreateEntityKey("Customers", customer); if (this._modelContainer.TryGetObjectByKey(key, out originalItem)) { this._modelContainer.ApplyCurrentValues(key.EntitySetName, customer); } this._modelContainer.SaveChanges(); It works for Scalar Property only. The customers.Visits collection is not updated. Best Regards :)

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• CGRect in C code

  - by Leif Andersen

  A simple google search for: CGRect + C or CGRect in C brings back only Apple, iPhone, and Objective-C websites. However, I remember hearing that Core Graphics was part of C at my university. Did I hear incorrectly, or is CGRect something that I can use in C, or even C++ as it's Object oriented?

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