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• StringBuffer vs. String

  - by erasmus

  In a code example I saw, the author uses StringBuffer with append method instead of String with + operator. What is the point here? Does StringBuffer have an advantage?

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• Notepad++ TextFX to escape a regular string for regular expression

  - by Stan

  In Notepad++ TextFX, is there a feature that can escape all reserved characters in a given string? Thanks.

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• How Delegate is differ from object in cocoa..?

  - by jeeva

  Hi, i want to know how Delegate is differ from object in cocoa any good articles.. Thanks..

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• Create a ruby Proc from a string

  - by user252787

  I want to define the block as a string, then create the lambda. The following example does not work. Is something like this possible? code_string = "|x|x*2" l = lambda {eval(code_string)} l.call(3) => 6

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• Call virtual method from base class on object of derived type

  - by Nikola Smiljanic

  class Base { public: virtual void foo() const { std::cout << "Base"; } }; class Derived : public Base { public: virtual void foo() const { std::cout << "Derived"; } }; Derived d; // call Base::foo on this object Tried casting and function pointers but I couldn't do it. Is it possible to defeat virtual mechanism (only wondering if it's possible)?

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• Correct Memory Management for [string UTF8String]

  - by madmik3

  I'm somewhat new to objective-c and I'm not sure what the correct memory management for this code is. const unsigned char * data =(const unsigned char *) [string UTF8String]; When I call free on data I get an error. Do I need to clean up after this call? thanks!

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• Unreferenced Thread object dispose

  - by Benny

  If i use thread like this: void foo() { new Thread().Start(); } since the Thread object is not referenced, will it be disposed by GC before the designated work is done?

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• How to make CodeIgniter accept "query string" URLs?

  - by Peter

  According to CI's docs, CodeIgniter uses a segment-based approach, for example: example.com/my/group If I want to find a specific group (id=5), I can visit example.com/my/group/5 And in the controller, define function group($id='') { ... } Now I want to use the traditional approach, which CI calls "query string" URL. Example: example.com/my/group?id=5 If I go to this URL directly, I get a 404 page not found. So how can I enable this?

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• C# Object Pooling Pattern implementation

  - by Chris Marisic

  Does anyone have a good resource on implementing a shared object pool strategy for a limited resource in vein of Sql connection pooling? (ie would be implemented fully that it is thread safe)

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• I can not addObject to NSMutableArray initializedWith 5 string objects

  - by ahmet732

  NSMutableArray *array = [[NSArray alloc] initWithObjects:@"Apranax Forte", @"Actified",@"Zostex 125 MG",@"Zoprotec 30 MG",@"Arveles 25 MG"]; [array insertObject:@"Ahmet" atIndex:[array count] + 1]; // Neither that nor this one [array addObject:@"Ahmet"] work !!!1 I want to append the Ahmet string to the NSMutableArray array object ... Can anyone help me ?

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• C - Convert long int to signed hex string

  - by Ben

  I have a long int variable that I need to convert to a signed 32bit hexadecimal string (8 characters) (char array) without the "0x" at the start? How would I go about doing this? Thanks.

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• std::string x(x);

  - by FredOverflow

  std::string x(x); This crashes very badly on my compiler. Does this mean I should test for this != &that in my own copy constructors, or can I assume that no client will ever be so stupid?

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• VBA check if object is set

  - by LanguaFlash

  I have a global variable that is an instance of my custom class. How to I check if the object is set or if I need to initialize it? Thanks, Jeff

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• Hibernate mapping to object that already exists

  - by teehoo

  I have two classes, ServiceType and ServiceRequest. Every ServiceRequest must specify what kind of ServiceType it is. All ServiceType's are predefined in the database, and ServiceRequest is created at runtime by the client. Here are my .hbm files: <hibernate-mapping> <class dynamic-insert="false" dynamic-update="false" mutable="true" name="xxx.model.entity.ServiceRequest" optimistic-lock="version" polymorphism="implicit" select-before-update="false"> <id column="USER_ID" name="id"> <generator class="native"/> </id> <property name="quantity"> <column name="quantity" not-null="true"/> </property> <many-to-one cascade="all" class="xxx.model.entity.ServiceType" column="service_type" name="serviceType" not-null="false" unique="false"/> </class> </hibernate-mapping> and <hibernate-mapping> <class dynamic-insert="false" dynamic-update="false" mutable="true" name="xxx.model.entity.ServiceType" optimistic-lock="version" polymorphism="implicit" select-before-update="false"> <id column="USER_ID" name="id"> <generator class="native"/> </id> <property name="description"> <column name="description" not-null="false"/> </property> <property name="cost"> <column name="cost" not-null="true"/> </property> <property name="enabled"> <column name="enabled" not-null="true"/> </property> </class> </hibernate-mapping> When I run this, I get com.mysql.jdbc.exceptions.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails I think my problem is that when I create a new ServiceRequest object, ServiceType is one of its properties, and therefore when I'm saving ServiceRequest to the database, Hibernate attempts to insert the ServiceType object once again, and finds that it is already exists. If this is the case, how do I make it so that Hibernate points to the exists ServiceType instead of trying to insert it again?

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• object explorer control

  - by šljaker

  I'm writing application for code generation and I would like to use object explorer control such as the one in visual studio, so I can manually design my objects. How can I do that?

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• How to convert a HTMLElement to a string

  - by Turtle

  Hi, I am going to create an xml element in javascript to exchange data with server side. I found I can do it with document.createElement.But I do not know how to convert it to string. Is there any API in browser to make it easier? Or is there any js lib incudling this API? Thanks in advance.

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• How to loop on a JSON object?

  - by Damiano

  Hello, I have this JSON object: {"time":"123456789", "raw":"chat_history", "data":{ "msg":[ {"time":1111111111, "user":"user1", "text":"text from user1"}, {"time":2222222222, "user":"user2", "text":"text from user2"}, {"time":3333333333, "user":"user3", "text":"text from user3"}, {"time":4444444444, "user":"user4", "text":"text from user4"} ] }} I have to create a FOR to loop the elements of data.msg and print it: I would print these results with the FOR: 11111111111 - user1 - text from users1 22222222222 - user2 - text from users2 33333333333 - user3 - text from users3 44444444444 - user4 - text from users4 Could you help me? Thank you very much

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• Traverse all the Nodes of a JSON Object Tree with JavaScript

  - by Takis Chan

  I'd like to traverse a JSON object tree, but cannot find any library for that. It doesn't seem difficult but it feels like reinventing the wheel. In XML there are so many tutorials showing how to traverse an XML tree with DOM :(

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• emacs 23 hangs on python mode when typing string block """

  - by Gopalakrishnan Subramani

  My emacs hangs (Ubuntu 9 + emacs 23 + pyflakes) when I type """ quotes for string blocks. anybody experience the same problem? I think, it may not be the emacs problem but some python mode or pyflakes which I use it for error checking. Anybody hot around the issue? It really frustrating experience.

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• how to create a JSON object in action class of JAVA

  - by Jugal

  I want to create a JSON object. I have tried the following myString=new JSONObject().put("JSON", sampleClass).toString(); but mystring gives me {"SampleClass@170f98"}. I also tried the following XStream xsStream=new XStream(new JsonHierarchicalStreamDriver()); SampleClass sampleClass=new SampleClass(userset.getId(),userset.getUsername()); myString=xsStream.toXML(sampleClass); It works but when i use getJSON in javascript to get myString it does not work.

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• Get Primary Key out of Zend_Db_Table_Rowset Object

  - by mr.alex

  Hi Everybody, inside of my Zend_Db_Table_Rowset Object i found this: ["_primary:protected"] ... does anybody if theres a way to access this? ... maybe something like $rowsetObject->getPrimary() Thanks for your help, Alex

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• How do you scale a pictureLink object in Excel 2010

  - by vzczc

  In Excel 2007 it is possible to scale a pictureLink object (created with the Camera Tool) using the following VBA code. With ActiveWorkbook.Sheets(sht).Pictures(name) .ShapeRange.ScaleWidth scaleValue, msoTrue .ShapeRange.ScaleHeight scaleValue, msoTrue .top = top .left = left End With This code places the picture correctly in 2010, but the scaleValue is ignored. The 2010 Excel documentation is patchy on this subject. The same code works fine in Excel 2007.

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• IVsEditorAdaptersFactoryService.CreateVsTextViewAdapter throws an object null reference

  - by Adam Driscoll

  I'm trying to create a IVsTextViewAdpater with the IVsEditorAdaptersFactoryService but when I call CreateVsTextViewAdapter it throws an object null reference: var editorFactory = componentModel.GetService<IVsEditorAdaptersFactoryService>(); var serviceProvider = (Microsoft.VisualStudio.OLE.Interop.IServiceProvider)this; var view = editorFactory.CreateVsTextViewAdapter(serviceProvider); 'this' is a Microsoft.VisualStudio.Shell.Package implementation. Any ideas?

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• Sharing an object between threads

  - by Dave18

  How would you set the object data that is shared between threads and needs to be updated once after the complete cycle of (say) two threads in busy loop? CRITICAL_SECTION critical_section_; int value; //needs to be updated once after the cycle of any number of threads running in busy loop void ThreadsFunction(int i) { while (true) { EnterCriticalSection(&critical_section_); /* Lines of Code */ LeaveCriticalSection(&critical_section_); } }

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• GWT Anchor setHref wipes out urlencoded string

  - by user326429

  I am using GWT Anchor, but when I pass a url encoded string to the setHref function, the browser displays the link in a decoded format. What's the reason for this? Is there a fix for it? Anchor a = new Anchor();a.setHref(URL.encode(someString));

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