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• What is the difference between "compile time" and "run time"?

  - by Surya sasidhar

  I do not understand what is meant by the terms "compile time" and "run time" (or "runtime"). I'm also a bit confused about what "value type" and "reference type" mean, and how they relate to the 'times mentioned above. Would someone please explain these things?

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• The right way to setup VisualStudio 2010 for OpenCL

  - by LonliLokli

  what is the right way to setup VisualStuio 2010 for working with *.cl files? I have added *.cl under Tool/Text editor/File extensions and copied usertype.dat into the common7/ide folder, but VS underlines keywords like float4 or cross. Is it necessary to add some key in registry or can somebody propose a tutorial? Thanks in advance. PS i have already asked similar question old one question, but now i am looking explicit for a solution with vs2010. It is not bad, but really nerves and deflects me from programming tasks.

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• Extracting data from a text file to use in a python script?

  - by Rob

  Basically, I have a file like this: Url/Host: www.example.com Login: user Password: password How can I use RegEx to separate the details to place them into variables? Sorry if this is a terrible question, I can just never grasp RegEx. So another question would be, can you provide the RegEx, but kind of explain what each part of it is for?

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• What will be the return status in the following sheel script.

  - by Pradip Bhojania

  i have two shell scripts: script1.sh echo "date : DATE" exit 0; script2.sh ./scripts1.sh if [ $? -eq 0 ]; then reboot; else echo "Failed" fi What should be the result. Ideally it should have been "reboot" , however on some execution i got the "failed" message too. Can anyone explain why this happens?

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• time required to finish the multithreaded program??

  - by user275131

  A java process starts 5 threads , each thread takes 5 minutes. what will be the minimum and maximum time taken by process? will be of great help if one can explain in java threads and OS threads. Edit : I want to know how java schedule threads at OS level.

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• How to interpret binary data as an integer?

  - by StackedCrooked

  The codebase at work contains some code that looks roughly like this: #define DATA_LENGTH 64 u_int32 SmartKey::SerialNumber() { unsigned char data[DATA_LENGTH]; // ... initialized data buffer return *(u_int32*)data; } This code works correctly, but GCC gives the following warning: warning: dereferencing pointer ‘serialNumber’ does break strict-aliasing rules Can someone explain this warning? Is this code potentially dangerous? How can it be improved?

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• Question ++ in c [closed]

  - by Niraj CHoubey

  Possible Duplicate: Could anyone explain these undefined behaviors (i = i++ + ++i , i = i++, etc…) int b=5; int c; c=b++ + ++b; outputs 12 while b=b++ + ++b; outputs 13. Can someone help me please?

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• database encryption questions

  - by 5YrsLaterDBA

  We are using Sybase SQL Anywhere 11. We need to encrypt some of our tables in our database. I followed the instruction and did it. We selected the "strong" option with encryptionKey and AES256_FIPS algorithm. But there are something I am not clear about them. It will require encryptonKey when we create the database, remove the database and start the database server but it will NOT require encryptionKey when we stop the database server and connect to the server to create tables and add data. Why there is NO encryptionKey asked when we connect to it or try to stop the server? I am doing something wrong? don't know how to test the encryption? I still can see all plain text in the encrypted tables when I use Sybase Central tool. If somebody knows the database user name and password, he/she can connect to the database and read the content without the encryptionKey. is this right?

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• Why call-by-value evaluation strategy is not Turing complete?

  - by Roman

  I'm reading an article about different evaluation strategies (I linked article in wiki, but I'm reading another one not in English). And it says that unlike to call-by-name and call-by-need strategies, call-by-value strategy is not Turing complete. Can anybody explain, please, why is it so? If it's possible, add an example pls.

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• What is Encapsulation and how can it defend abstractions against corruption?

  - by symfony

  It's quoted from a report by Bjarne: Encapsulation – the ability to provide guarantees that an abstraction is used only according to its specification – is crucial to defend abstractions against corruption. Can someone explain this? Thanks

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• uitextfield secure

  - by D_R

  I have a UITexetField with "Secure" option enabled in InterfaceBuilder (used to enter a password). Then I try to read, what the user entered. (void)textFieldDidEndEditing:(UITextField *)textField{ NSString *txt = textField.text; int a = 0; } It works fine with iOS 5 but since I use it in iOS6, this method no longer works - neither in simulator, nor at the real device. It was called, but textField.text returns always an empty string. With other UITextFields, without "Secure" option, it works fine. Could somebody help me ?

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• Difference between "and" and "where" in joins

  - by Midhat

  Whats the difference between SELECT DISTINCT field1 FROM table1 cd JOIN table2 ON cd.Company = table2.Name and table2.Id IN (2728) and SELECT DISTINCT field1 FROM table1 cd JOIN table2 ON cd.Company = table2.Name where table2.Id IN (2728) both return the same result and both have the same explain output

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• Need of serialization in Java

  - by JavaUser

  Hi , Can anyone tell me what is the need of Serialization in Java and an example scenario to explain the need . I dont need the definition .

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• using datatype in php is possible?

  - by fayer

  i have seen this in php (symfony): public function executeShow(sfWebRequest $request) { // logic } i didnt know that you could declare a datatype in php? have i missed something? could someone explain this. thanks

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• How to create animated sliding windows/tabs menu?

  - by Forte

  I have created navigation menu in YUI 2.8 as below : I have also animated tabs using CSS transitions. CSS transitions are not widely supported by browsers and my animations are not working in Opera, IE etc. Since i'm already using YUI 2.8 on that page, can somebody tell me how do i animate those tabs? When i click on any tab, it should expand in vertical dimension smoothly (animated). Below are the properties of tabs which are going to change when i select any tab (Below properties of tabs should be animated) : Paddings Margins Background-Color Borders Please note in above image : There is little space left on right side in case #1 when 1st tab is selected. In case #2 and case #3 there is space left on left as well as right side. In case #4, there is some space left on left side when last tab is selected.

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• What is the significance of Thread.Join method in c sharp .net ?

  - by Techee

  What is the significance of Thread.Join method in c sharp .net ? MSDN says that it blocks the calling thread until a thread terminates. Can anybody explain this with a simple example ?

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• Adding multiple images to AnimateDrawables sample code in Android

  - by Nator

  Hello, I was trying to add more than one images in the AnimateDrawables under com.example.android.apis.graphics, but for some reason I couldn't. Can anyone post a sample code on how to accomplish it or at least explain it to me? This beginner programmer would really appreciate it. Thanks

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• replay in django + apcahce + mod_wsgi ??

  - by Adam

  I have a simple django page that has a counter on it. I use Apache2 and mod_wsgi to serve it. First, when I enter this page, the counter shows 0, as it should. The second time when I enter the page the counter shows 1 - again, it is the right behavior. The problem begins now, cause when I enter this page the third time, I get 0 again. When I refresh it goes between 0, and 1, clearly using some cache or so. If I wait for some time and then try again, it will show 2, and 3, but will be stuck with those values, till this cache or whatever it is will be flushed, and then the counter continues. Does somebody knows how I can get it work right (the real scenario deals with getting data from the DB, but the problems with this strange cache are the same). BTW, I don't have any caching engine set in my django settings.

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• How Session Works?

  - by learner

  Any body can explain me how session works in PHP. for eg. 3 users logged into gmail. how the server identifies these 3 uers. what are the internel process behind that.

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• How to parse results from google blog search?

  - by Jooj

  Hello! I'm trying to parse the number of results from google seach blog. Could somebody please help me! http://blogsearch.google.com/blogsearch?hl=en&ie=UTF-8&q=a&btnG=Search+Blogs returns a complete page. On the right side you can see (Results 1 - 10 of about 2,504,830,546 for a. (0.05 seconds) ). How could I get 2,504,830,546??? Thanks. Regards.

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• Is this a valid C statement ?

  - by Philando Gullible

  Lets say I write char c[99] = {'Stack Overflow'}; in C or C++ it does compiles fine but does this valid? By valid I meant not invoking any kind of undefined or unspecified behavior. Again if I write char c[99] = 'Stack Overflow'; gcc complains about multicharacter constant which is obvious but in the above when I am enclosing within curly brackets compiler is happy! why is it so ? I also notice that puts(c); after the first statement will output 'w' precisely the last character of a general string in-place of Stack Overflow. why so ? Could somebody explain this behavior may be separately.

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• Easy way to build an in-app demo like they do in Convertbot?

  - by mystify

  I want to make a little in-app demo like Tapbots does in Convertbot. Maybe there is a better solution than mine? make everything programmatically controlable write a huge class with hundreds of performSelector:withObject:afterDelay: calls to control the whole app for the demo The demo actually only does two things: Simulate touches on controls (i.e. programmatically pressing buttons) Show text message bubbles when appropriate to explain what is going on How would you do it?

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• PHP Regular expression flags

  - by incrediman

  Can someone explain what the 'e' flag does, or link me to somewhere that does? I couldn't find anything via google. Example: preg_replace("/a(b?)c/e", "search_foo_term('\$1')", $str);

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• Even more advanced .htaccess question

  - by Richard

  Got a great answer earlier, but unfortunately, I didn't explain the WHOLE situation: I need to rewrite: blog.domainname.com/archives/YYYY/MM/postname/ and www.blog.domainname.com/archives/YYYY/MM/postname/ to www.domainname.com/blog/postname/ Thanks in advance!

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• How can I have a floating image (right aligned) with text that wraps around the image in Android Lay

  - by groomsy

  It's kind of hard to explain, but an example of what I'm wanting to accomplish is like this: Here is some text | image | that is printed | | out in a view and --------- it is wrapped around an image that is floating and right aligned. I thought about generating the layout in html and using a web view, but I need to be able to perform an action when the user clicks on the image. Does anyone have any ideas? Thanks in advance, groomsy

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