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• Java String object creation

  - by Ajay

  Hi, 1) What is difference in thers two statements: String s1 = "abc"; and String s1 = new String("abc") 2) as i am not using new in first statement, how string object will be created Thanks

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• Why does Visual Studio use different indentation settings for C# and for C++?

  - by Michal Czardybon

  For C# Visual Studio uses 4 spaces by default, whereas for C++ it is hard-tabs. Why is it so? Why is it different? My project consists of both C# and C++ code and the difference really annoys me. I want to set a common standard for all the sources, but I wonder if this would have any drawbacks.

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• assembly: data segment when called from c or created as an independet programm

  - by aristotaly

  im confuse about this i dont think that there shuld be any difference in both casess the programm ends up as exe file please help if you think a differ....

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• C++: ptr->hello(); /* VERSUS */ (*ptr).hello();

  - by Joey

  i was learning about c++ pointers... so the "-" operator seemed strange to me... instead of ptr-hello(); one could write (*ptr).hello(); because it also seems to work, so i thought the former is just a more convenient way is that the case or is there any difference?

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• What are the benefits of using properties internally?

  - by cyclotis04

  Encapsulation is obviously helpful and essential when accessing members from outside the class, but when referring to class variables internally, is it better to call their private members, or use their getters? If your getter simply returns the variable, is there any performance difference?

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• Detect pointer arithmetics because of LARGEADDRESSAWARE

  - by Suma

  I would like to switch my application to LARGEADDRESSAWARE. One of issues to watch for is pointer arithmetic, as pointer difference can no longer be represented as signed 32b. Is there some way how to find automatically all instances of pointer subtraction in a large C++ project? If not, is there some "least effort" manual or semi-automatic method how to achieve this?

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• How does openId authentication works ?

  - by Biswanath

  Hi, I am little curious to know about how the openId works. And is there any difference between the openId authentication and the authentication which the sites use exclusively for themselves? Thanks.

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• is there a performance different between passing something into viewdata compared to a view model

  - by ooo

  in asp.net mvc , if i shove a dictionary or an array of objects in ViewData and read that in my view compared to creating a view model class that has that same data structure, is there a performance difference or other consideration or should i expect the same response time?

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• How does a parser LL(*) works?

  - by freezer878

  Hi, I cannot find any complete description about LL() parser, such as ANTLR, on Internet. I'm wondering what is the difference between an LL(k) parser and an LL() one and why they can't support left-recusrive grammars despite their flexibility. Thanks in advance. Fabio.

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• Why can one null return be tested but another throws an exception?

  - by mickey

  I want to test if an xml attribute is present. Given this: XmlAttributeCollection PG_attrColl = SomeNodeorAnother.Attributes; This first test works: if (null != PG_attrColl["SomeAttribute"]) "GetNamedItem" is supposed to return null, but the following test throws an exception complaining about the null it returns. if (null != PG_attrColl.GetNamedItem("SomeAttribute").Value;) Why the difference? Just curious.

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• What DirectShow Interface to use for capturing to Stream instead of creating actual file?

  - by jhorton

  I've got a DirectShow project where I want to capture and stream to a webserver. I have seen how to capture and create a file, but I'm looking for ideas on how to capture into something like a MemoryStream to transport through a NetworkStream. I'm also using the library DirectShowLib for the ability to write in C# if that makes any difference. Of if there is a sample that I overlooked in the SDK I would greatly appreciate the direction. Thanks in advance.

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• @synthesize comma separated list

  - by Frooditz Furs

  Hi, I've read apple's Objective-C doc and am curious about using @synthesize. I've seen classes with a long list of @synthesizes and I've seen classes with one @synthesize then a long comma-separated list of ivars. So what's the difference between: @synthesize ivar1; @synthesize ivar2; @synthesize ivar3; and @synthesize ivar1, ivar2, ivar3; ????

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• VB.NET Function Return

  - by waves

  In order to return a value from a VB.NET function one can assign a value to the "Functions Name" or use "return value." I sometimes see these inter-mixed in the same function. Personally, I prefer the return. My question is, what is the internal difference, if any, between the two?

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• INNER JOIN keywords | with and without using them

  - by cedar715

  SELECT * FROM TableA INNER JOIN TableB ON TableA.name = TableB.name SELECT * FROM TableA, TableB where TableA.name = TableB.name Which is the preferred way and why? Will there be any performance difference when keywords like JOIN is used? Thanks

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• What features EJB3 bring and also how does EJB3 stack up with Spring Framework ?

  - by Rachel

  I have never worked on ejb, when I started programming Spring was already arrived and all my projects have been with Spring only, recently I had one interview and they wanted knowledge of EJB3.0 and so I want to know how does EJB3.0 stack up with Spring Framework and why many projects now a day are with Spring Framework and not with EJB3.0, do not quote me here as I can be wrong I would really appreciate if difference and benefits of using one over another could be explained from practical perspective.

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• How to make liquid layout in css using em?

  - by Rajasekar

  Does using em as css unit solve the problem in difference in monitor resolution (800x600 vs. 1024x768)?

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• What does Java Node normalize method do?

  - by Tom Brito

  I'm doing some tests, but I see no difference when I use or not the normalize() method. But the examples at ExampleDepot website use it. So, what is it for? (The documentation wasn't clear for me either)

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• Qt releasing memory occopied by unneeded images

  - by Gerhman

  I have a QML Flickable with 3 QML image elements that cycle through 8 image files. My problem is for each new image it loads into memory it does not release the the unused image. This is causing memory usage to become double what is necessary at times. I would like to know if there is some function I can use to force it to unload all the unused images? If it makes a difference, this is mainly for Symbian.

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• Comparing two text files in python

  - by tazim

  Hi, I need to compare two files and redirect the different lines to third file. I know using diff command i can get the difference . But, is there any way of doing it in python ? Any sample code will be helpful

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• In Java, when should I use an abstract method in an interface?

  - by John Oxley

  I have the following interface in Java public interface IFoo { public abstract void foo(); public void bar(); } What is the difference between foo() and bar()? When should I use abstract? Both seem to accomplish what I want unless I'm missing something subtle? Update Duplicate of Why would one declare a Java interface method as abstract?

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• Java Build Path - Add External JARs' and Add Variable

  - by Lakshman

  What is the difference between Java Build Path - Add External JARs Button and Add Variable Button Functionality, Why its required. Please explain in detail.

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• Generics : List<? extends Animal> is same as List<Animal>?

  - by peakit

  Hi, I am just trying to understand the extends keyword in Java Generics. List<? extends Animal> means we can stuff any object in the List which IS A Animal then won't the following also mean the same thing: List<Animal> Can someone help me know the difference between the above two? To me extends just sound redundant here. Thanks!

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• lisp, differences in assignment functions

  - by johnc

  I'm pretty new to lisp, so apologies for what may be a simple question, Whilst I understand the difference between DEFVAR and DEFPARAMETER (defvar only sets undefined variables), and the LET is for local scope only, what is the is the use of SETF as opposed to the other, previously mentioned assignment functions?

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• When to retain a "delegate"

  - by Jose

  I know that in Objective-C you should never retain your delegates because it may cause a retain-cycle, however, how do you know the difference between a delegate and a non-delegate object ? Can't it be said that just sending a message to any object is delegating work to that object ?

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• Opera doesn't recognize 0.0.0.0 as localhost. Is this behaviour standard-conform?

  - by java.is.for.desktop

  Hello, everyone! Opera (version 10.10) under Linux (don't know about other OSes) does not recognize http://0.0.0.0/ as local address (http://127.0.0.1/) , while Firefox does. What is the difference between these addresses? Which ob the two browsers in this case is standard conform?

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