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• which situation abstract class i should use

  - by Bharanikumar

  Hi , Am not worked on extream level of oops in my projects , So i have little doubts , In which situation should i use abstract method or classes , Basically i know about abstract class definition and flow, I got details from this URL Doubt is which situation should i use abstract class and methods ,

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• Icon(s) not replaced - Still getting error with tycho 0.16.0 unless it should be fixed

  - by Dactabird

  I'm using Tycho 0.16.0 and still getting the following Error: Error - 7 icon(s) not replaced in C:\Users\weich01\AppData\Local\Temp\p2.brandingIron8219115442087687624\launcher.exe using C:\Development\Workspaces\Workspace RCP SR2\de.mycompany.myproduct.product\target\products\MyProduct\de.mycompany.myproduct.feature\logo_pms_2011.ico This error should be fixed in v0.16, shouldn't it? With eclipse export everything works fine, so product definition is correct. The icon file contains bmp in all sizes. Thanks for your help

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• CSS: content:"\00a0"

  - by SteD

  Today I came across a new CSS syntax that I have never seen before content:"\00a0"; Checking it on w3schools, it explains: Definition and Usage The content property is used with the :before and :after pseudo-elements, to insert generated content. My question is, can you point out to me in real world example, how do we use this 'content' syntax? And what does the \00a0 mean in this case?

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• How to check if the given string is palindrome?

  - by Prakash

  Definition: A palindrome is a word, phrase, number or other sequence of units that has the property of reading the same in either direction How to check if the given string is a palindrome? This was one of the FAIQ [Frequently Asked Interview Question] a while ago but that mostly using C. Looking for solutions in any and all languages possible.

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• error: expected `;' before '{' token - What is the cause?

  - by melee

  Here is my implementation file: using namespace std; #include <iostream> #include <iomanip> #include <string> #include <stack> //line 5 #include "proj05.canvas.h" //----------------Constructor----------------// Canvas::Canvas() //line 10 { Title = ""; Nrow = 0; Ncol = 0; image[][100]; // line 15 position.r = 0; position.c = 0; } //-------------------Paint------------------// line 20 void Canvas::Paint(int R, int C, char Color) { cout << "Paint to be implemented" << endl; } The errors I'm getting are these: proj05.canvas.cpp: In function 'std::istream& operator>>(std::istream&, Canvas&)': proj05.canvas.cpp:11: error: expected `;' before '{' token proj05.canvas.cpp:22: error: a function-definition is not allowed here before '{' token proj05.canvas.cpp:24: error: expected `}' at end of input proj05.canvas.cpp:24: error: expected `}' at end of input These seem like simple syntax errors, but I am not sure what's wrong. Could someone decode these for me? I'd really appreciate it, thanks for your time! EDIT Here is the definition of Canvas in my .h file: #ifndef CANVAS_H #define CANVAS_H #include <iostream> #include <iomanip> #include <string> #include <stack> class Canvas { public: Canvas(); void Paint(int R, int C, char Color); const int Nrow; const int Ncol; string Title; int image[][100]; stack<int> path; struct PixelCoordinates { unsigned int r; unsigned int c; } position; }; #endif

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• How do i generate hubernate models for java dotCMS plugins

  - by shuxer

  Hi I am trying to create a plugin for dotCMS. My plugin stores data in database. i defined hibernate mapping file and put in my plugin folder's conf dir and i have no idea how to hibernate generate models based my mapping definition. I am using hello world plugin's mapping file for mysql Any help or comment would be highly appreciated Thanks in advance

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• Why does my Sharepoint page's custom content type change to "Page" when editing?

  - by Mobius

  I have a custom Sharepoint 2007 site definition with custom content types for the different page layouts. When editing a page using a custom layout from the main "View all contents" tree view, the page content type is fine, but if I view the page directly and edit it from there, the content type gets stripped and replaced with "Page." I can change it back by viewing and editing it from the main list, but not from its subsite home location.

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• Python: concatenate generator and item

  - by TarGz

  I have a generator (numbers) and a value (number). I would like to iterate over these as if they were one sequence: i for i in tuple(my_generator) + (my_value,) The problem is, as far as I undestand, this creates 3 tuples only to immediately discard them and also copies items in "my_generator" once. Better approch would be: def con(seq, item): for i in seq: yield seq yield item i for i in con(my_generator, my_value) But I was wondering whether it is possible to do it without that function definition

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• SQLAlchemy introspection

  - by Shaman

  What I am trying to do is to get from SqlAlchemy entity definition all it's Column()'s, determine their types and constraints, to be able to pre-validate, convert data and display custom forms to user. How can I introspect it? Example: class Person(Base): ''' Represents Person ''' __tablename__ = 'person' # Columns id = Column(String(8), primary_key=True, default=uid_gen) title = Column(String(512), nullable=False) birth_date = Column(DateTime, nullable=False) I want to get this id, title, birth date, determine their restrictions (such as title is string and max length is 512 or birth_date is datetime etc) Thank you

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• How to call a generic method through reflection

  - by milan

  Hi, is it possible to call with reflection a method with "explict type argument" <S> definition e.g. oObject.Cast<S>() ? where is: IList <P> oObject = new List <P>(); I tried with oObject.getType().InvokeMember( "Cast", BindingFlags.InvokeMethod, null, oObject, null) but it does not work, does anyone know why?

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• string problems, tuple strings.

  - by suresh

  a tuple representing starting points for the first substring, a tuple representing starting points for the second substring, and the length of the first substring. The function should return a tuple of all members (call it n) of the first tuple for which there is an element in the second tuple n+m+1 = k, where m is the length of the first substring. Complete the definition def constrainedMatchPair(firstMatch,secondMatch,length):

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• C++ stream as a parameter when overloading operator<<

  - by TheOm3ga

  I'm trying to write my own logging class and use it as a stream: logger L; L << "whatever" << std::endl; This is the code I started with: #include <iostream> using namespace std; class logger{ public: template <typename T> friend logger& operator <<(logger& log, const T& value); }; template <typename T> logger& operator <<(logger& log, T const & value) { // Here I'd output the values to a file and stdout, etc. cout << value; return log; } int main(int argc, char *argv[]) { logger L; L << "hello" << '\n' ; // This works L << "bye" << "alo" << endl; // This doesn't work return 0; } But I was getting an error when trying to compile, saying that there was no definition for operator<<: pruebaLog.cpp:31: error: no match for ‘operator<<’ in ‘operator<< [with T = char [4]](((logger&)((logger*)operator<< [with T = char [4]](((logger&)(& L)), ((const char (&)[4])"bye")))), ((const char (&)[4])"alo")) << std::endl’ So, I've been trying to overload operator<< to accept this kind of streams, but it's driving me mad. I don't know how to do it. I've been loking at, for instance, the definition of std::endl at the ostream header file and written a function with this header: logger& operator <<(logger& log, const basic_ostream<char,char_traits<char> >& (*s)(basic_ostream<char,char_traits<char> >&)) But no luck. I've tried the same using templates instead of directly using char, and also tried simply using "const ostream& os", and nothing. Another thing that bugs me is that, in the error output, the first argument for operator<< changes, sometimes it's a reference to a pointer, sometimes looks like a double reference...

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• How do I make vim indent java annotations correctly?

  - by wds

  When indenting java code with annotations, vim insists on indenting like this: @Test public void ... I want the annotation to be in the same column as the method definition but I can't seem to find a way to tell vim to do that, except maybe using an indent expression but I'm not sure if I can use that together with regular cindent. edit: The filetype plugin was already turned on I just got a bit confused about indenting plugins. The accepted answer may be a bit hackish but works for me as well.

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• Is it possible to call an object method this way in C++?

  - by Goose Bumper

  Here's my class definition: class A { public: void do_lengthy_work() { cout << "working." << endl; } }; I have an object of type A, and I want to call do_lengthy_work() on it: A a; a.do_lengthy_work(); Is it also possible to call the same method using some variant of the following? A::do_lengthy_work(a);

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• Best ways to write a method that updates two objects in a multithreaded java environment?

  - by DanielHonig

  Suppose we have a class called AccountService that manages the state of accounts. AccountService is defined as interface AccountService{ public void debit(account); public void credit(account); public void transfer(Account account, Account account1); } Given this definition, what is the best way to implement transfer() so that you can guarantee that transfer is an atomic operation. I'm interested in answers that reference Java 1.4 code as well as answers that might use resources from java.util.concurrent in Java 5

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• Inline functions in C++

  - by user265260

  If we define a member function inside the class definition itself, is it necessarily treated inline or is it just a request to the compiler which it can ignore.

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• test="" on a boolean always returns true xslt

  - by user70448

  Why does <xsl:if test="<XPATH to boolean value here>"> ... </xsl:if> ALWAYS return true? Since boolean can be 0,1,"false" and "true" by definition, the ONLY way to test for a boolean value is to do string comparison against these. This can't be right.

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• How to use the lib section of a Design Document in CouchDB 0.11

  - by fuzzy lollipop

  I want to add some custom javascript functions to my design document, I can't find any examples of how to actually add these functions to the "lib" section of a design document. Can someone show me an example of how to add a function definition to the "lib" section?

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• What is the difference between an Operator and a function in Haskell?

  - by kunjaan

  I am new to Haskell and this mixture of Infix and Prefix notation is confusing me. What is the difference between an operator like '+' and a function like head? How do I write an operator 'c' which does this 1 c 1 = 2? I found this definition a ! b = True. How does Haskell know that I am defining ! and not a function a?

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• how to find corresponding source code or definations from site: android.git.kernel.org

  - by wsgjj

  Hello , everyone Some pre-define variant, for example:attribute value, layout view .etc. (e.g.android:galleryItemBackground), where i can find the source code(exactly implementation or definition) in site: android.git.kernel.org,

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• Standalone application in C, a good idea?

  - by chutsu

  The term has several definition according to Wikipedia, however what I'm really interested in is creating a program that has all its needed dependencies included within the source folder, so the end user doesn't need to install additional libraries for the app to install. For example, how Mac apps has all its dependencies all within the program itself already... or is there a function that autotools does this? I'm programming in the Linux environment...

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• Deriving a class from an abstract class (C++)

  - by cemregoksu

  I have an abstract class with a pure virtual function f() and i want to create a class inherited from that class, and also override function f(). I seperated the header file and the cpp file. I declared the function f(int) in the header file and the definition is in the cpp file. However, the compiler says the derived class is still abstract. How can i fix it?

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• ApplicationContext ctx = new FileSystemXmlApplicationContext error

  - by GigaPr

  Hi I am completely new to Java, so sorry if my question may sound a bit stupid. I am following a tutorial on hibernate and i am trying to get the context definition files from the file system. ApplicationContext ctx = new FileSystemXmlApplicationContext( new String[] { "conf/rssWebApplication-services.xml", "conf/rssWebApplication-data-hibernate.xml" }); But i get the following error: found : org.springframework.context.support.FileSystemXmlApplicationContext required: org.jboss.weld.context.ApplicationContext ApplicationContext ctx = new FileSystemXmlApplicationContext( new String[] { "conf/rssWebApplication-services.xml", Any idea what is the problem? Thanks

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• List<MyClass*> & array question

  - by Nano HE

  Hi, Assuming a definition like this, list<MyCommand*> subList ... MyCommand* pCmd = (MyCommand*)(m_treeSM.GetItemData(node)); I tried these statements below, but failed. pCmd->subList[2] (pCmd->subList)[2] How can I get the array member values(such as subList[2]). I want to replace the value of subList[2] with other same type value. Thank you.

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• Why is undefined behavior allowed (as opposed to not compiling/crashing)?

  - by Roman A. Taycher

  I understand the reasons for compiler/interpreter language extensions but why is behaviour that has no valid definition allowed to fail silently/do weird things rather then throwing a compiler error? Is it because of the extra difficulty(impossible or simply time consuming) for the compiler to catch them)?

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