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  • what's the C# equivalent of string$ from basic

    - by Preet Sangha
    And is there an elegant linqy way to do it? What I want to do is create string of given length with made of up multiples of another string up to that length So for length - 9 and input string "xxx" I get "xxxxxxxxx" (ie length 9) for a nun integral multiple then I'd like to truncate the line. I can do this using loops and a StringBuilder easily but I'm looking to see if the language can express this idea easily. (FYI I'm making easter maths homework for my son)

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  • Delphi 7: ADO, need basic coding example

    - by mawg
    I am a complete n00b here. Can someone please post some Delphi code to create a database add a simple table close the database then, later open a database read each table read each field of a given table perform a simple search Sorry to be so clueless. I did google, but didn't find a useful tutorial ...

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  • Basic join query understanding

    - by OM The Eternity
    I know this very silly, but can anybody help me in understanding what does this join query is doing in elabortive description? SELECT j1.* FROM jos_audittrail j1 LEFT OUTER JOIN jos_audittrail j2 ON (j1.trackid = j2.trackid AND j1.field = j2.field AND j1.changedone < j2.changedone) WHERE j1.operation = 'UPDATE' AND j1.trackid=$t_ids[$n] AND j2.id IS NULL I know its very silly, but i need to go ahead with my further need... Pls do help me...

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  • Basic CHMOD restriction

    - by Marshall Mathews
    i have an uploads folder on my website. What i want to do is restrict users from accessing like i dont want them to go to www.mysite.com/uploads/ and see the files in there and it should show forbidden, but they should be able to download via my website, for example www.mysite.com/downloads.php?id=1 If thats not possible, how can i atleast not show them the directory index on /uploads How is it that file sharing websites does this? An htaccess with deny from all stops php from accessing the file as well Please tell me a solution if you would know, i googled and asked on irc a few days ago about this issue, its pretty confusing to me.

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  • SIMPLE BASH Programming.

    - by atif089
    I am a newbie to BASH so please dont mind my stupid questions because I am not able to get any good sources to learn that. I want to create a script to display filename and its size. This is what the code is like filename=$1 if [ -f $filename ]; then filesize=`du -b $1` echo "The name of file is $1" echo "Its size is $filesize" else echo "The file specified doesnot exists" fi The output is like this $ ./filesize.sh aa The name of file is aa Its size is 88 aa But in the last line I dont want to show the name of the file. How do I do that ? I want to do the same thing using wc as well.

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  • Basic compile issue with QT4

    - by Cobus Kruger
    I've been trying to get a dead simple listing from a university textbook to compile with the newest QT SDK for Windows I downloaded last night. After struggling through the regular nonsense (no make.bat, need to manually add environment variables and so on) I am finally at the point where I can build. But only one of the two libraries seem to work. The .pro file I use is dead simple: SUBDIRS += utils \ dataobjects TEMPLATE = subdirs In each of these two subfolders I have the source for a library. Running QMAKE generates a makefile and running Make runs through all the preliminaries and then fails on the g++ call: g++ -enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc --out-implib,libdataobjects.a -shared -mthreads -Wl -Wl,--out-implib,c:\Users\Cobus\workspace\lib\libdataobjects.a -o ..\..\lib\dataobjects.dll object_script.dataobjects.Debug -L"c:\Users\Cobus\Portab~1\Qt\2010.02.1\qt\lib" -LC:\Users\Cobus\workspace\lib -lutils -lQtXmld4 -lQtGuid4 -lQtCored4 c:/users/cobus/portab~1/qt/2010.02.1/mingw/bin/../lib/gcc/mingw32/4.4.0/../../../../mingw32/bin/ld.exe: cannot find -lutils The problem seems to be right near the end of the command line, where -lutils is added, indicating that there is a library by the name of utils. While I would have expected to see that, you'll notice the library names after --out include lib in the name, so they become libutils and libdataobjects. I have tried to figure out why this is happening, to no avail. Anyone have an idea what's going on?

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  • Viewing an EXE File

    - by Steve
    I was attempting to install an exe that requires a serial number before the install, which the vendor has not provided to us yet. This got my wheels turning about whether there is any information that can be gained from viewing an exe using a hex editor/VI/etc? Using VI to view an exe, I can see some sections of plain text, but it is difficult to determine what it refers to without any context around it. Is it possible to determine any information by reading an exe? Thanks

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  • Shell script to process files

    - by Harish
    I need to write a Shell Script to process a huge folder of nearly 20 levels.I have to process each and every file and check which files contain lines like select insert update When I mean line it should take the line till I find a semicolon in that file. I should get a result like this C:/test.java select * from dual C:/test.java select * from test C:/test1.java select * from tester C:/test1.java select * from dual and so on.Right now I have a script to read all the files #!bin/ksh FILE=<FILEPATH to be traversed> TEMPFILE=<Location of Temp file> cd $FILE for f in `find . ! -type d`; do cat $FILE/addedText.txt>>$TEMPFILE/newFile.txt cat $f>>$TEMPFILE/newFile.txt rm $f cat $TEMPFILE/newFile.txt>>$f rm $TEMPFILE/newFile.txt done I have very little knowledge of awk and sed to proceed further in reading each file and achieve what I want to.Can anyone help me in this

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  • Custom installation directories

    - by Alex Farber
    Let's say I am writing installation script for the program which contains executable file and shared library. By default, this script places executable to /usr/local/bin, and shared library to /usr/local/lib. In this case my program may be executed by any user by typing its name in the command line. Suppose that user selects custom installation directory, like ~/myprogram/. Is it user's responsibility to ensure that my program may be executed, or my installation script must do this?

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  • Logging from multiple apps/processes to a single log file

    - by Andrew
    Our app servers (weblogic) all use log4j to log to the same file on a network share. On top of this we have all web apps in a managed server logging errors to a common error.log. I can't imagine this is a good idea but wanted to hear from some pros. I know that each web app has its own classloader, so any thread synchronization only occurs within the app. So what happens when multiple processes start converging on a single log file? Can we expect interspersed log statements? Performance problems? What about multiple web apps logging to a common log file? The environment is Solaris.

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  • Can I use POSIX signals in my Perl program to create event-driven programming?

    - by Shiftbit
    Is there any POSIX signals that I could utilize in my Perl program to create event-driven programming? Currently, I have multi-process program that is able to cross communicate but my parent thread is only able to listen to listen at one child at a time. foreach (@proc) { sysread(${$_}{'read'}, my $line, 100); #problem here chomp($line); print "Parent hears: $line\n"; } The problem is that the parent sits in a continual wait state until it receives it a signal from the first child before it can continue on. I am relying on 'pipe' for my intercommunication. My current solution is very similar to: http://stackoverflow.com/questions/2558098/how-can-i-use-pipe-to-facilitate-interprocess-communication-in-perl If possible I would like to rely on a $SIG{...} event or any non-CPAN solution. Update: As Jonathan Leffler mentioned, kill can be used to send a signal: kill USR1 = $$; # send myself a SIGUSR1 My solution will be to send a USR1 signal to my child process. This event tells the parent to listen to the particular child. child: kill USR1 => $parentPID if($customEvent); syswrite($parentPipe, $msg, $buffer); #select $parentPipe; print $parentPipe $msg; parent: $SIG{USR1} = { #get child pid? sysread($array[$pid]{'childPipe'}, $msg, $buffer); }; But how do I get my the source/child pid that signaled the parent? Have the child Identify itself in its message. What happens if two children signal USR1 at the same time?

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  • Cpp some basic problems

    - by DevAno1
    Hello. My task was as follows : Create class Person with char*name and int age. Implement contructor using dynamic allocation of memory for variables, destructor, function init and friend function show. Then transform this class to header and cpp file and implement in other program. Ok so I've almost finished my Person class, but I get error after destructor. First question is how to write this properly ? #include <iostream> using namespace std; class Person { char* name; int age; public: int * take_age(); Person(){ int size=0; cout << "Give length of char*" << endl; cin >> size; name = new char[size]; age = 0; } ~Person(){ cout << "Destroying resources" << endl; delete *[] name; delete * take_age(); } friend void(Person &p); int * Person::take_age(){ return age; } void init(char* n, int a) { name = n; age = a; } void show(Person &p){ cout << "Name: " << p.name << "," << "age: " << p.age << endl; } }; int main(void) { Person *p = new Person; p->init("Mary", 25); p.show(); system("PAUSE"); return 0; } And now with header/implementation part : - do I need to introduce constructor in header/implementation files ? If yes - how? - my show() function is a friendly function. Should I take it into account somehow ? I already failed to return this task on my exam, but still I'd like to know how to implement it.

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  • Some help with basic Sound functions in actionscript 3

    - by danwoods
    Hello all. I'm working on a mp3 player and I'm super new at all things flash so there are lots of questions. Currently I'm getting stuck on the track change. My variable declaration look like this: var index:int = -1; var music:Sound = new Sound(new URLRequest("moe2008-05-24d02t02_vbr.mp3")); var sc:SoundChannel; var isPlaying:Boolean = false; and my change track function looks like this: function changeTrack(newTrack){ sc.stop(); isPlaying = false; music = new Sound(new URLRequest(newTrack)); sc = music.play(); isPlaying = true; index++; } Does anyone see any obvious errors??? Thanks

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  • Very basic question about Hadoop and compressed input files

    - by Luis Sisamon
    I have started to look into Hadoop. If my understanding is right i could process a very big file and it would get split over different nodes, however if the file is compressed then the file could not be split and wold need to be processed by a single node (effectively destroying the advantage of running a mapreduce ver a cluster of parallel machines). My question is, assuming the above is correct, is it possible to split a large file manually in fixed-size chunks, or daily chunks, compress them and then pass a list of compressed input files to perform a mapreduce?

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  • Shell script task status monitoring

    - by Bikram Agarwal
    I'm running an ANT task in background and checking in 60 second intervals whether that task is complete or not. If it is not, every 60 seconds, a message should be displayed on screen - "Deploy process is still running. $slept seconds since deploy started", where $slept is 60, 120, 180 n so on. There's a limit of 1200 seconds, after which the script will show the log via 'ant log' command and ask the user whether to continue. If the user chooses to continue, 300 seconds are added to the time limit and the process repeats. The code that I am using for this task is - ant deploy & limit=1200 deploy_check() { while [ ${slept:-0} -le $limit ]; do sleep 60 && slept=`expr ${slept:-0} + 60` if [ $$ = "`ps -o ppid= -p $!`" ]; then echo "Deploy process is still running. $slept seconds since deploy started." else wait $! && echo "Application ${New_App_Name} deployed successfully" || echo "Deployment of ${New_App_Name} failed" break fi done } deploy_check if [ $$ = "`ps -o ppid= -p $!`" ]; then echo "Deploy process did not finish in $slept seconds. Here's the log." ant log echo "Do you want to kill the process? Press Ctrl+C to kill. Press Enter to continue." read log limit=`expr ${limit} + 300` deploy_check fi Now, the problem is - this code is not working. This looks like a perfectly good code and yet, this is not working. Can anyone point out what is wrong with this code, please.

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  • aumix problem- how can I make the changes permenantly

    - by thillai-selvan
    Hai every one. How can I make the changes in the aumix permanently? I am running the aumix application using the following command thinapplaunch aumix. I am increasing the volume manually. I saved and quit. I am again launching that application using the same command. thinapplaunch aumix Now all the changes I made is still there. All the volumes are full. But when I logged out and login again the changes is not exists. All the volumes are not full. How can I make the changes permanently? Any help much appreciated. Thanks in Advance!!!

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  • Basic Hibernate Caching Question

    - by manyxcxi
    Doe Hibernate use cache (second level or otherwise) if all I am doing is batch inserts? No entities are being requested from the database, and no generators are used. Also, would StatelessSession vs Session change the answer? What if I was using a Session with a JDBC batch size of 50? The cache I will be using is Ehcache

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  • iteratively creating graphs

    - by Andrei
    I have a bunch of files containing x and y coordinates, representing time and value (space-separated, but can be amended) For example: 15:06:59 0.0140 ....... I want to create a word file (or some equivalent) to show all these graphs. Right now I am using Excel. It pretty daunting task, as I ahve to plug paste numbers in two rows for each graph, and I have many of them. Thanks

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  • Why Does Piping Binary Text to the Screen often Horck a Terminal

    - by Alan Storm
    Imaginary Situation: You’ve used mysqldump to create a backup of a mysql database. This database has columns that are blobs. That means your “text” dump files contains both strings and binary data (binary data stored as strings?) If you cat this file to the screen $ cat dump.mysql you’ll often get unexpected results. The terminal will start beeping, and then the output finishes scrolling by you’ll often have garbage chacters entered on your terminal as through you’d typed them, and sometimes your prompts and anything you type will be garbage characters. Why does this happen? Put another way, I think I’m looking for an overview of what’s actually happening when you store binary strings into a file, and when you cat those files, and when the results of the cat are reported to the terminal, and any other steps I’m missing.

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  • Exit SSH from the script

    - by Kimi
    I Want to exit ssh: Does the below line work: ssh -f -T ${USAGE_2_USER}@${USAGE_2_HOST} Or do i need to write it some other way . Please tell should I use exit with ssh an how?

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  • basic c# question

    - by CoffeeCode
    why doesn't the element get swapped public static void SwapArray(ref int[,] arr) { for (int i = 0; i < arr.GetLength(0); i++) { for (int j = 0; j < arr.GetLength(0); j++) { int temp = arr[i, j]; arr[i, j] = arr[j, i]; arr[j, i] = temp; Console.Write(arr[i, j] + " "); } Console.WriteLine(); } } even if the parameter is without a ref modifier the array doesn't change. a copy of the reference is passed as a parameter right?

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