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• str_replace function wont replace string if i use single quotes

  - by robezy

  I using php's str_replace function to replace some text. Example below. str_replace("{x+{\$v}}", "{x-{\$v}}", $this->introtext); str_replace('{x+{\$v}}', '{x-{\$v}}', $this->introtext); In first case it replace text, but in second case it is not doing so. What is difference between two?

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• How is an abstract class different from an Interface from a design point ?

  - by somaraj

  I have seen many answers in stackoverflow , but i didnt find an answere that is matching mine . Apart from all those difference , Does it makesense if we say An Abstract class abstracts the implementation of behaviour while an interface abstracts the type which implements the behaviour.

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• How to subtract dates in YYYYMMDD format?

  - by NinjaBomb

  I have 2 integer fields that represent dates in the YYYYMMDD format. What is the best way to subtract 2 of these fields to get the correct # of days between them? For instance, if I take the difference between 20100511 and 20100428 I would like the result to be 13 and not 83. I know I need to convert the integer fields into date formats but everything I have tried either throws an exception or doesn't work correctly. What am I missing? Answers in vb.net please

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• Why would it be necessary to subclass from object in Python?

  - by rmh

  I've been using Python for quite a while now, and I'm still unsure as to why you would subclass from object. What is the difference between this: class MyClass(): pass And this: class MyClass(object): pass As far as I understand, object is the base class for all classes and the subclassing is implied. Do you get anything from explicitly subclassing from it? What is the most "Pythonic" thing to do?

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• Adapter Methods in Android?

  - by Praveen Chandrasekaran

  i have go through the three methods in Adapters classes. getView() newView() bindView() what are the difference between those methods? please share some tutorial, sample code or logics to understand this. Thanks. i have to create a listview with the progressive icons. which adapter you suggest me to do that?

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• ClickOnce - Publishing folder vs. Installation folder

  - by Randy Minder

  Could someone tell me the difference between the publishing folder location and the installation folder URL? Is there any reason why these two wouldn't be the same?

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• Naming Convention for Blackberry Development

  - by Nirmal

  I have gone through with some of the sample examples of blackberry. And in some classes I have found some variables are starting from _ like _address and some of them are ALLCAPS. So, i guess it's bit different then the basic Java naming conventions. So, can anybody let me know that is there any difference between Java and blackberry naming convention ? Thanks in advance.

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• Proc.new vs Lambda in Ruby

  - by piemesons

  Plese check this: def foo f = Proc.new { return "return from foo from inside proc" } f.call # control leaves foo here return "return from foo" end def bar f = lambda { return "return from lambda" } f.call # control does not leave bar here return "return from bar" end puts foo # prints "return from foo from inside proc" puts bar # prints "return from bar" Can anybody tell me what lambda is and what is Proc and whats the difference.

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• How can I change my JLabel to look like a table cell with Substance?

  - by DR

  I have a custom TableCellRenderer which returns a JLabel as the renderer component. Naturally the table cell now looks like a label and no longer like a table cell, which makes a difference especially when using Substance. Is it possible to modify the label so that the LaF renders it like an ordinary table cell? The best I could do was setting the background color of the label, but the borders and transition effets are missing.

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• Calculate time in months between two unix timestamps

  - by samwatt

  Hi, what is the shortest way to calculate the difference in months (average num of days in a month as 30) between two unix timestamps? Date::diff is available for working with DateTime objects, but I'm wondering if there's a neat way to work this out with timestamps...

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• When should we use Mockery vs JUnit4Mockery?

  - by Aman

  If writing a Java unit test with mocking using JMock, should we use Mockery context = new Mockery() or Mockery context = new JUnit4Mockery() What is the difference between the two, and when should we use which?

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• What is unit testing?

  - by Alon

  What is unit testing and unit testing libraries like xUnit? I understood it's testing specific code, so what's the difference between this and just opening a new project and test this specific code?

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• SQL Server insert slow

  - by andrew007

  Hi, I have two servers where I installed SQL Server 2008 Production: RAID 1 on SCSI disks Test: IDE disk When I try to execute a script with about 35.000 inserts, on the test server I need 30 sec and instead on the production server more than 2 min! Does anybody know why such difference? I mean, the DB is configured in the same way and the production server has also a RAID config, a better processor and memory... THANKS!

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• GL_POINTS or quads fastest?

  - by pop850

  I'm working on a drawing app where there's a lot of textured points. Just wondering if there's a speed difference between the two (i tried both and couldn't tell) Thanks

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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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• Can Any one tell me Differnece between Iphone and Ipad?

  - by iphonedeveloper

  Hi,Friends.. I want to know basic difference between IPhone and Ipad. I am Junior developer at iphone development company. Still i am fresher to this. And also How can Iphone/Ipad technology differs from other Technology?

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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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• Is there a way to bypass the jQuery error handler?

  - by oravecz

  If my Ajax call returns a successful result, but while processing the result I cause an exception, the error handler fires. This seems counter intuitive to me as I think the error handler should only fire when an error occurs as a result of making the Ajax call or via a server-side error. I am trying to use the Ajax function in a unit test so I would like to tell the difference between the two different failure scenarios.

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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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• 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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• C: performance of assignments, binary operations, et cetera...

  - by Shinka

  I've heard many things about performance in C; casting is slow compared to normal assignments, functional call is slow, binary operation are much faster than normal operations, et cetera... I'm sure some of those things are specific to the architecture, and compiler optimization might make a huge difference, but I would like to see a chart to get a general idea what I should do and what I should avoid to write high-performance programs. Is there such a chart (or a website, a book, anything) ?

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• iPhone memory management, a newbie question

  - by Reuven

  Hi, I've seen in (Apple) sample code two types of ways of allocation memory, and am not sure I understand the difference and resulting behavior. // FAILS NSMutableArray *anArray = [NSMutableArray array]; [anArray release]; // WORKS NSMutableArray *anArray1 = [[NSMutableArray alloc] init]; [anArray release]; By "FAILS" I mean I get crashes/runtime warnings etc., and not always as soon as I call the release... Any explanation appreciated. Thanks

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• Sesion timout vs Form Authentication timeout

  - by Costa

  Hi What is the difference between a abandon Session and a cookie timeout, what if the session is abandon and the cookie is still alive, is that can lead to a problem? <sessionState timeout="1" /> <authentication mode="Forms"> <forms loginUrl="login.aspx" timeout="1" /> </authentication> Thanks

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• Testing for validity

  - by Konrad

  Hi, I'd like to know the difference (if any) between the following: if( someDOMElement.someProperty ) { ... if( someDOMElement.someProperty != null ) { ... if( someDOMElement.someProperty != undefined ) { ... Is one safer than the others?

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• sharepoit performance counter instance name with [ACL]

  - by intangible02

  Select a Sharepoint performance counter object, there are two instances for each of my web site. For example, for the ssp site, the two instance are named as portnumber_ssp_admin portnumber_ssp_admin[ACL] What is the difference between the two instances? What is the meaning of [ACL]?

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