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Articles indexed Thursday April 22 2010

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  • Maximum speed of data transmission

    - by JavaRocky
    All major data carriers these days use fiber optic links these days. And data transmission occurs at the speed of light, is that correct? If data transmission does indeed occur at the speed of light, is it also correct to assume that data transmission will never ever be faster?

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  • Creating dynamic map graphs

    - by Mehper C. Palavuzlar
    I need a software (or softwares) to achieve the following. I'm not sure if it could be done, but I'd like to hear the suggestions from super users. The data I want to use for graphing purposes include sales figures of magazines by provinces. There are 81 provinces of Turkiye, and I want the computer to automatically paint / write on a graph according to the sales magnitude of the provinces. Since there are loads of magazines with loads of issues, the process must be executed automatically just after selecting the related magazine and issue. So there will be graphs showing the sales weight of the whole country with some nice illustrations. Those graphs might be used as part of some decision support mechanism to help field teams. Is it possible? I have all the data and base maps of Turkiye to be filled/painted. I'm sure this is not easy. If there is a way to do that, it might probably include more than one software. Thanks in advance for any valuable comments and answers.

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  • jQuery plugin to style objects

    - by Alex
    Hi. I've been looking at the various JavaScript UI libraries and am wondering if there's one that can add some styling to page elements. I'm currently adding rounded corners, shadows, borders, and gradients via my own CSS + hacks to get it working on IE. I'm using jQuery for a number of tasks and wondered if there's a plugin that can add these design flairs more easily to DIVs. Not that you want to go overboard with this stuff, but when you need to use it, you'd like to depend on cross-browser and tried-and-tested solutions. Thanks.

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  • How do I Convert ARGB value from string to color?

    - by James
    I am trying to use the MakeColor method in the GDIAPI unit but the conversion from int to byte is not returning me the correct value. Example var argbStr: string; A, R, G, B: Byte; begin argbStr := 'ffffcc88'; A := StrToInt('$' + Copy(AValue, 0, 2)); R := StrToInt('$' + Copy(AValue, 3, 2)); G := StrToInt('$' + Copy(AValue, 5, 2)); B := StrToInt('$' + Copy(AValue, 7, 2)); Result := MakeColor(A, R, G, B); end; What am I doing wrong?

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  • Ideas on implementing threads and cross process communication. - C

    - by Jamie Keeling
    Hello all! I have an application consisting of two windows, one communicates to the other and sends it a struct constaining two integers (In this case two rolls of a dice). I will be using events for the following circumstances: Process a sends data to process b, process b displays data Process a closes, in turn closing process b Process b closes a, in turn closing process a I have noticed that if the second process is constantly waiting for the first process to send data then the program will be just sat waiting, which is where the idea of implementing threads on each process occured. I have already implemented a thread on the first process which currently creates the data to send to the second process and makes it available to the second process. The problem i'm having is that I don't exactly have a lot of experience with threads and events so I'm not sure of the best way to actually implement what I want to do. Following is a small snippet of what I have so far in the producer application; Rolling the dice and sending the data: case IDM_FILE_ROLLDICE: { hDiceRoll = CreateThread( NULL, // lpThreadAttributes (default) 0, // dwStackSize (default) ThreadFunc(hMainWindow), // lpStartAddress NULL, // lpParameter 0, // dwCreationFlags &hDiceID // lpThreadId (returned by function) ); } break; The data being sent to the other process: DWORD WINAPI ThreadFunc(LPVOID passedHandle) { HANDLE hMainHandle = *((HANDLE*)passedHandle); WCHAR buffer[256]; LPCTSTR pBuf; LPVOID lpMsgBuf; LPVOID lpDisplayBuf; struct diceData storage; HANDLE hMapFile; DWORD dw; //Roll dice and store results in variable storage = RollDice(); hMapFile = CreateFileMapping( (HANDLE)0xFFFFFFFF, // use paging file NULL, // default security PAGE_READWRITE, // read/write access 0, // maximum object size (high-order DWORD) BUF_SIZE, // maximum object size (low-order DWORD) szName); // name of mapping object if (hMapFile == NULL) { dw = GetLastError(); MessageBox(hMainHandle,L"Could not create file mapping object",L"Error",MB_OK); return 1; } pBuf = (LPTSTR) MapViewOfFile(hMapFile, // handle to map object FILE_MAP_ALL_ACCESS, // read/write permission 0, 0, BUF_SIZE); if (pBuf == NULL) { MessageBox(hMainHandle,L"Could not map view of file",L"Error",MB_OK); CloseHandle(hMapFile); return 1; } CopyMemory((PVOID)pBuf, &storage, (_tcslen(szMsg) * sizeof(TCHAR))); //_getch(); MessageBox(hMainHandle,L"Completed!",L"Success",MB_OK); UnmapViewOfFile(pBuf); return 0; } I'd like to think I am at least on the right lines, although for some reason when the application finishes creating the thread it hits the return DefWindowProc(hMainWindow, message, wParam, lParam); it crashes saying there's no more source code for the current location. I know there are certain ways to implement things but as I've mentioned I'm not sure if i'm doing this the right way, has anybody else tried to do the same thing? Thanks!

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  • Is it safe to spin on a volatile variable in user-mode threads?

    - by yongsun
    I'm not quite sure if it's safe to spin on a volatile variable in user-mode threads, to implement a light-weight spin_lock, I looked at the tbb source code, tbb_machine.h:170, //! Spin WHILE the value of the variable is equal to a given value /** T and U should be comparable types. */ template<typename T, typename U> void spin_wait_while_eq( const volatile T& location, U value ) { atomic_backoff backoff; while( location==value ) backoff.pause(); } And there is no fences in atomic_backoff class as I can see. While from other user-mode spin_lock implementation, most of them use CAS (Compare and Swap).

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  • Java: calculate linenumber from charwise position according to the number of "\n"

    - by HH
    I know charwise positions of matches like 1 3 7 8. I need to know their corresponding line number. Example: file.txt Match: X Mathes: 1 3 7 8. Want: 1 2 4 4 $ cat file.txt X2 X 4 56XX [Added: does not notice many linewise matches, there is probably easier way to do it with stacks] $ java testt 1 2 4 $ cat testt.java import java.io.*; import java.util.*; public class testt { public static String data ="X2\nX\n4\n56XX"; public static String[] ar = data.split("\n"); public static void main(String[] args){ HashSet<Integer> hs = new HashSet<Integer>(); Integer numb = 1; for(String s : ar){ if(s.contains("X")){ hs.add(numb); numb++; }else{ numb++; } } for (Integer i : hs){ System.out.println(i); } } }

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  • Where is app.config go after publishing ?

    - by Shyju
    Where does the app.config go when i publish a website using VS IDE.I Cant see it in my Publish output directory I have the app.config created by VS IDE when i added a web refernce to my class libaray.I want to have a editable app.config so that i dont want to rebuild everytime when i want to switch to another webservice

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  • Using Generics to return a literal string or from Dictionary<string, object>

    - by Mike
    I think I outsmarted myself this time. Feel free to edit the title also I could not think of a good one. I am reading from a file and then in that file will be a string because its like an xml file. But in the file will be a literal value or a "command" to get the value from the workContainer so <Email>[email protected]</Email> or <Email>[? MyEmail ?]</Email> What I wanted to do instead of writing ifs all over the place to put it in a generic function so logic is If Container command grab from container else grab string and convert to desired type Its up to the user to ensure the file is ok and the type is correct so another example is so <Answer>3</Answer> or <Answer>[? NumberOfSales ?]</Answer> This is the procedure I started to work on public class WorkContainer:Dictionary<string, object> { public T GetKeyValue<T>(string Parameter) { if (Parameter.StartsWith("[? ")) { string key = Parameter.Replace("[? ", "").Replace(" ?]", ""); if (this.ContainsKey(key)) { return (T)this[key]; } else { // may throw error for value types return default(T); } } else { // Does not Compile if (typeof(T) is string) { return Parameter } // OR return (T)Parameter } } } The Call would be mail.To = container.GetKeyValue<string>("[email protected]"); or mail.To = container.GetKeyValue<string>("[? MyEmail ?]"); int answer = container.GetKeyValue<int>("3"); or answer = container.GetKeyValue<int>("[? NumberOfSales ?]"); But it does not compile?

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  • Overriding Node Paths

    - by fighella
    Can a PAGE override the priority of a NODE? I want to use the power of "Pages" to override my links from the nodes... For example: A nodes link is /content/202/hello-world I want to use my Panels to use the URL to create a "PAGE"... The panels can use the arguments from the URL to create a pretty cool page around the content of a node... So the PAGE path I've made is /content/%argument1/%title... I need the links created to the node from the node itself to go to this panel page and not to the content created by the node on its own... so i make the path alias do the same as the PAGE settings... /content/nid/title... A hand typed in link to this PAGE works fine when I dont have this as the path alias... It does exactly what I need... but as soon as I make this the Path Alias, it's like it goes to the single NODE before it goes to the PAGE... Anyone have any clues... Is there an order which Drupal looks for the correct URL? Im sure I have done this before. JD

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  • C++/CLI Mixed Mode DLL Creation

    - by Adam Haile
    I've got a native C++ DLL that I would like to have a C++/CLI wrapper layer for. From what I understood, if you simple added a C++/CLI class to the project, VS would compile as mixed mode, but I was apparently wrong as VS doesn't seem to be even touching the managed code. So, given a pre-existing native code-base what exactly, step-by-step, do you need to do to create a mixed mode DLL, so that I can can link into that code from any .NET language? *I need to do this because my native code uses C++ classes that I cannot P/Invoke into.

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  • Geez &ndash; do you even do basic testing?

    - by Shawn Cicoria
    You’d think that a “real” commercial software vendor would at least run a barrage of tests validating updates – ANY updates – before pushing out those updates. Well, McAfee has done it again.  This one, well it just shuts you down…  False positives on a core Windows file. https://kc.mcafee.com/corporate/index?page=content&id=KB68780 http://support.microsoft.com/kb/2025695 Usually, if I get a PC with McAfee offered for “free” usually, I either wipe or uninstall.  That product is the work of the devil.  I can’t understand how these guys are still in business.

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  • how to give read access to logs

    - by skomak
    Hi, How can i give read access to logs for other users? Perhaps the solution is to set group for this files and add some users there. But how to do that for /var/log/maillog? I mean, logrotate will reset perms? If i change group from root to another won't it generate any problems? Actual state: -rw------- 1 root root 337M kwi 22 15:40 maillog

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  • Phone system for 55 size firm

    - by Hemal
    Hello, We are in the process of upgrading our 11 years old PBX system and looking for options like Panasonic, Avaya, Toshiba etc. We welcome any suggestions/features/product models to look for 55+ size firm... Thank you in advance for any replies...

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  • Is an Intranet music streaming server legal?

    - by Jon Smock
    We are a large organization with thousands of users, and we're peaking on our Internet usage. Many of those users are streaming music while they work. We're wondering if providing a music streaming server internally would help on bandwidth. How legal is that? Here are two scenarios: 1) We purchase a body of music legally and stream it internally (I assume this is illegal) 2) We pull music feeds from free, legal, online sources and "rebroadcast" internally (I assume this is legal) We want to save bandwidth and help our users, but we want to do it in an ethical and legal way.

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  • XCOPY /Exclude Directory Syntax

    - by Onion-Knight
    I'm trying to use XCOPY to copy a directory that looks like this: -MainFolder -ManyFoldersIWantToCopy -ManyFoldersIWantToCopy -... -Source Code I want to use the /EXCLUDE option to copy every folder except Source Code. I tried using the following, but I did not have any luck: xcopy "Source" "Destination" /EXCLUDE:"\Source Code\" /E /C /R /I /K /Y The error message I receive says: Can't read file: "\Source Code\". I've tried removing the double-quotes all together, using single-quotes instead, with/without the \'s, but I get the same error message. Any ideas?

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  • Lock web app only work for intranet

    - by justjoe
    some week in the future i will have job to create php web app that will work as billing process. As the client and my team agree upon, the web app will only deploy in their internal server. This need arose some fundamental questions for myself. how do we lock the web app really really will work only in internal server and not in internet as it asked ? cause this need, the cost for the job have been cut into some degree. so it will be best if it only work as client describe it : it will be deploy in intranet an intranet only What is the pro and cons deploy php application only (with all of its apache server )in intranet ? What is the fundamental different between deploying php app in intranet environment and in internet ? is there anything to be consider ? I know we can put windows in to a flash-disk or pen-disk. i there any autorun apache/php server that work in the same fashion ?

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