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  • C++ operator[ ] on integer litteral

    - by gregseth
    I found this piece of code: char a = 1["ABC"]; A few quick test led me to the fact it was the same than writing: char a = "ABC"[1]; Which seems far more logical to me. So my questions: Why is this notation valid? Is there any reason to write something that way?

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  • Receiving data from a USB device in C or C++

    - by Midas
    It starts to bore me that I always have to ask questions about trifles. I simply need a list of all plugged in USB devices and have the user select one to let the console application receive any data the USB device sends. I can then start playing around with the data in my program. I don't want to use library's, only standard C++ functions, and the program should work in Windows 98.

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  • How do I use python-webkit2png to take many screenshots at the same time?

    - by oldfellow
    I've got thousands of urls from many hosts I need to screenshot. I can use the lib fine from the command line, but how can I integrate it into my code so I can take multiple screenshots simultaneously? I think it's something to do with xvfb as with the answer to this question: http://stackoverflow.com/questions/1747022/how-to-kill-headless-x-server-started-via-python but I'm not sure what exactly.

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  • gdb: getting into a dictionary

    - by mlecho
    hi, i saw this post today: http://stackoverflow.com/questions/112796/how-to-view-contents-of-nsdictionary-variable-in-xcode-debugger. i need to see the contents of a dictonary but i only know the "key"...is there a way i can spit out the details like a print_r in php? po gives me the object, but i would like to go deeper po 0x2027c0 NSCFDictionary

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  • Does setting HttpCacheability.Public also cache the page on the server?

    - by Stewart Robinson
    I have these lines in my global.asax (basically because of http://stackoverflow.com/questions/2469348/can-i-add-my-caching-lines-to-global-asax) The thing I want to now understand is whether this code purely adds the HTTP headers to the page or does it also make .Net cache this page on the server for 300 seconds? Response.Cache.SetExpires(DateTime.Now.AddSeconds(300)); Response.Cache.SetCacheability(HttpCacheability.Public);

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  • The fundamentals of Hash tables?

    - by kylex
    I'm quite confused about the basic concepts of a Hash table. If I were to code a hash how would I even begin? What is the difference between a Hash table and just a normal array? Basically if someone answered this question I think all my questions would be answered: If I had 100 randomly generated numbers (as keys), how would I implement a hash table and why would that be advantageous over an array? Psuedo-code or Java would be appreciated as a learning tool...

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  • direct file download protection

    - by Ahmet vardar
    Hi, I have a folder for downloads on my server, i want to prevent direct access to that folder so i am makin it pass-protected with htaccess and i will push download with a php script. But i have some questions regarding mkdir and file_exists Do mkdir and file_exists works good for pass-protected folders ? and would i get any error while uploading file to that folder ? AND is this a good way of preventing direct access ? thanks

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  • What happens when I throw an exception?

    - by helloWorld
    I have some technical questions. In this function: string report() const { if(list.begin() == list.end()){ throw "not good"; } //do something } If I throw the exception what is going on with the program? Will my function terminate or will it run further? If it terminates, what value will it return?

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  • XSLT processing with Qt

    - by swegi
    Hi, I like to display some (X)HTML content in a Qt application using QtWebKit. The content should be generated from XML documents via XSLT. As I am new to Qt, my questions are as follows: 1) Can QtWebKit display XML documents with the xml-stylesheet element set? 2) Can Qt apply XSLT to an XML document and return the result as a string or write it to a file?

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  • Flash Browser? Flash Server Side?

    - by Abs
    Hello all, I have two noobish questions about Flash, Actionscript, Flex etc. 1) With these technologies is it possible to create a simple web browser that can render websites? 2) Is it possible to run these technologies on the server side? I am guessing no as Flash requires a browser to run within? Thanks all for any help

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  • c# clipboard viewer... on firefox the event fires twice..

    - by lena2211
    hi .. iam trying to use the code posted here http://stackoverflow.com/questions/621577/clipboard-event-c it does work really great, but while testing, i found out that when copying from some application as example firefox, you will get the event running twice, so if you are saving the copied text to a textfile, or writing them to a textbox in the application, the text copied from firefox will appear twice ? anybody can help me with this problem ? thanks a lot

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  • Sorting an array of structs

    - by keruilin
    I have an array of structs called leaders. The struct class looks like this, for contextual info: class Leader < Struct.new(:rank, :user); end Two questions: How do I sort the array of structs by rank? How do I sort the array of structs by rank and by user.created_at?

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  • difference between C(gcc 4.3.2) , C 99 strict(gcc 4.3.2) , C++(gcc-4.0.0-8) ,C++(gcc-4.3.2)

    - by user1139048
    I have the following questions concerning the differences between the four options: What is the main difference between the four options? Which of the above support int64_t or long long without suffix LL. I want a data type of the range 2^63 - 1 If your answer to my second question is not C(gcc 4.3.2) , whether the code I write in C(gcc 4.3.2) for C language will be valid in rest of the three options or do I have to modify something, then what will be those modifications.

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  • C#, why does Convert.ToBoolean("0") fail?

    - by JL
    I know that trying to convert string "0" to boolean will fail, I also know how to fix this, thanks to Jon Skeets answers on other questions. What I would like to know is WHY does C# not recognise "0" as a valid input for a boolean conversion, surely you could look at it like 0 = false, 1 = true, or even -1 = false and 0 = true, anyways, my logic tells me that it could be a valid input, so is there a very good reason why its not? My bet is old vb6 would be able to recognize the string input "0" as valid.

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