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• Numeric GUI bottleneck

  - by Physic

  Hi all, I've made a GUI to set up and start a numerical integrator using PyQT4, Wing, QT, and Python 2.6.6, on my Mac. The thing is, when I run the integrator form the GUI, it takes very many times longer than when I crudely run the integrator from the command line. As an example, a 1000 year integration took 98 seconds on the command line and ~570 seconds from the GUI. In the GUI, the integration runs from a thread and then returns. It uses a a queue to communicate back to the GUI. Does anyone have any ideas as to where the bottleneck is? I suspect that others may be experiencing something like this just on a smaller scale. t = threading.Thread( target=self.threadsafe_start_thread, args=( self.queue, self.selected ) ) t.start() Thanks!

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• Mercurial - How do you export your repo's source to a production site?

  - by orokusaki

  I've tried using archive in Tortoise HG by opening my repo change log. This doesn't seem to be anything like SVN's export command, where I can simply export a remote repository to the current directory. I use this to get a clean copy of my source for production (without notes and repository data). How can I do something like this in HG? Or, should I just use clone and deal with the repo related data manually? BTW, I need to do this all via command line since I'm not going to be using Tortoise HG on my Linux server. Any help is much appreciated.

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• bash copy with variable

  - by zaf

  I'm trying to copy files to the current directory using a bash script. In order to handle paths that need escaping a variable is used that is escaped and then supplied to the cp command. The cp command is complaining with: usage: cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file target_file cp [-R [-H | -L | -P]] [-fi | -n] [-apvX] source_file ... target_directory I know what that means but I cannot understand why that happens. Here is the code: z="/a/b/c d e f.txt" y=`printf %q "$z"` cp $y x.txt # not working as expected echo cp $y x.txt # output is "cp /a/b/c\ d\ e\ f.txt x.txt"

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• Why are some programs writing on stderr instead of stdout their output?

  - by Zagorax

  I've recently added to my .bashrc file an ssh-add command. I found that ssh-add $HOME/.ssh/id_rsa_github > /dev/null results on a message "identity added and something else" every time I open a shell. While ssh-add $HOME/.ssh/id_rsa_github > /dev/null 2>&1 did the trick and my shell is now 'clean'. Reading on internet, I found that other command do it, (for example time). Could you please explain why it's done?

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• How to automate rsync without asking for password prompt

  - by Rijosh K

  i would like to automate the rsync task as a cron job.. since it needs the passphrase i am not able to do the cronjob. i need to specify the passphrase along with the rsync command or i will store the passphrase in a file and i will read from it. my command will look like this.. rsync -aPe "ssh -i ' . $server-{'ssh_key'} . '" ' . $server_lock_dir; so where do i put the password .. pls help

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• Detecting when a process has finished (but not exited)

  - by Egwor

  I have a program that's run in unix (that I have no control over) that when finished prints 'Completed successfully' but does not exit. I want to automatically detect when the process finishes (by checking the output of the command), so that I can kill the process and so that I can proceed do other activities. The complexity comes because I want to be able to run multiples of these scripts concurrently. (One activity I need to do requires the script to be called with various inputs, but each time the script runs it takes a while to return, and so I want to do them in parallel) Has anyone done something similar to this? I could redirect the stderr and stdout output of the command to a temporary file which has a random file name, then tail the file and pipe to grep for the end conditions (I.e. the certain log lines). The problem is, surely tail -f would keep running, and so it would never exit. Should I poll? If so, what's the best approach?

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• Generating UML diagrams from textual representation

  - by satofish

  How can I generate a UML sequence diagram from a file containing a textual representation of my process, with command-line tools in Linux?

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• How to access Oracle system tables from inside of a PL/SQL function or procedure?

  - by mjumbewu

  I am trying to access information from an Oracle meta-data table from within a function. For example (purposefully simplified): CREATE OR REPLACE PROCEDURE MyProcedure IS users_datafile_path VARCHAR2(100); BEGIN SELECT file_name INTO users_datafile_path FROM dba_data_files WHERE tablespace_name='USERS' AND rownum=1; END MyProcedure; / When I try to execute this command in an sqlplus process, I get the following errors: LINE/COL ERROR -------- ----------------------------------------------------------------- 5/5 PL/SQL: SQL Statement ignored 6/12 PL/SQL: ORA-00942: table or view does not exist I know the user has access to the table, because when I execute the following command from the same sqlplus process, it displays the expected information: SELECT file_name FROM dba_data_files WHERE tablespace_name='USERS' AND rownum=1; Which results in: FILE_NAME -------------------------------------------------------------------------------- /usr/lib/oracle/xe/oradata/XE/users.dbf Is there something I need to do differently?

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• Python change the working directory for an exe opened with startfile

  - by Saulpila

  In python i'm using the os.startfile command to start a windows executable that does especific stuff in its own folder, the python code is running from another folder, so when I start the file, it starts in the python script's working directory, but it has to start in its own directory. I've tried to use os.chdir(path) to change the working directory, but it fails, the file still not runs in it's own folder. I thought maybe there is a command like shortcut's "Start in" line. I've searched everywere, but not success. The only solution comes to my mind is to create a shortcut and add the "start in" line, then launch the shortcut, but that is very impractical.

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• How to read and loop through each rows in an Excel using C#

  - by Ullan

  I need to read an excel file and loop through the rows. I used the below code to read the excel file. But I am not getting the entire row, inseatd of getting the column values. try { OleDbConnection objConnection = new OleDbConnection(strConnectionString); string queryString = string.Format("Select * from [{0}$]", strSheetName, objConnection); OleDbCommand command = new OleDbCommand(queryString, objConnection); objConnection.Open(); OleDbDataReader reader = command.ExecuteReader(); while (reader.Read()) { var val1 = reader[0].ToString(); //Here I want to get each row } reader.Close(); } catch (Exception ex) { Console.WriteLine(ex.Message); } I need to check if the row is empty or not, if not empty, I need to serach for some values in a particular column. Thanks for your help

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• MySQL, PHP, and Apache errors while connecting to DB

  - by cypherdelton

  I'm having two errors when I test the "mysql_connect()" function in php. I just installed PHP and MySQL from scratch. These errors may be related, so I will post them both here: Warning: mysql_connect() [function.mysql-connect]: Headers and client library minor version mismatch. Headers:50158 Library:50518 in /usr/local/apache2/htdocs/index.php on line 6 Warning: mysql_connect() [function.mysql-connect]: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) in /usr/local/apache2/htdocs/index.php on line 6 Many websites say to start the mysql server if you are getting error #2. Whenever I execute the command mysqld start --user=mysql I get the error "mysqld: Too many arguments (first extra is 'start'); Adding the "&" to the end of the command makes no difference (I don't know if it is supposed to). Thanks, Cypher Delton

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• Merge arrow in clear case

  - by cheiav

  Hi, I have to merge all objects from a sub branch to main branch recursively. I would like to merge manually by check in the code from sub branch to main branch instead of using merge command in clear case. So after the check in into the main branch I would like to draw arrow recursively to all my objects. ic from sub branch to main branch I have used this command cleartool mkhlink -unidir Merge <sub branch path>>@@/main/<<sub branch>> <<main brach path>>@@/main/LATEST But when I dit it, it is drawing the arrow for the directory only not for all contains of the directory. Please suggest how to draw the arrow recursively from sub branch to main branch objects. Thanks in advance

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• Continue Drupal processing after page send.

  - by David

  I need to do some additional processing after a Drupal page has been sent. I know I could fire a background shell command, but I need the current Drupal execution context to be maintained. I've spent a lot of time looking, but I can't find any documentation in this regard. This is surprising because it must surely be a common requirement. The only real idea I have is to fire up Drupal (again) via a shell command (exec, etc) and supply it with a pseudo path which would invoke the continued processing. But this seems unnecessarily complex/wasteful. Any pointers greatly appreciated, tks.

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• freeing malloc and checkin it is empty or not

  - by gcc

  char *p; p="kjkjk"; . .//there are codes which are checking another command . if(.....)//i used pointer p in only that area free(p); . . //there are codes which are checking another command . if(p==NULL) //i check whether is empty .... if(p==-1) //can we use "EOF==p " in if statement ... //are there any usage like that EOF==p else .... I think there is big error , but where?

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• Can I find out what WCF methods are supported on the endpoint before calling it?

  - by alord1689

  I have a versioning issue with a WCF service contract in which one of the many endpoints which are called for the operation is missing one method from the contract. My question is, how can I make sure the command is available on the client before attempting to call it? I tried: foreach (var od in proxy.Endpoint.Contract.Operations) { if (od.Name == "MyMethodName") { hasMethod = true; break; } } Unfortunately, this is using the contract from the calling app and does not actually describe the implementations on the endpoint itself. As a result, it returns true even though the endpoint has failed to implement the command.

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• joomla's hwdvideoshare module help

  - by Sam

  hi! i using hwdvideoshare module in joomla and i can't use the Method 1 for Direct Video Conversions. it requires the following things to be done: * The exec() function need to be enabled in PHP. * safe_mode must be set to Off. You can check that at Joomla Help -> System Info -> PHP Information) * php-cli (Command Line Interface to PHP) must be installed in the server and its path set in Server Settings * safe_mode must be set to Off for php-cli. You can check that executing php -i | grep safe_mode from the command line i've checked the first two settings. i don't know whether php-cli is enabled or not..i'm using php5..how do i enable it, without messing with other php packages?

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• How to generate R.java by a manual on Linux platform

  - by user305787

  I have a question. I am developing android applcation on Linux platform because i have to make a system.img with a application. When adding a drawable resource and building the project with mm command, i met a below error. "cannot find symbol R.drawable.icon_send_type" At above error, the icon_send_type is the added resource. This error occurred because the mm command did not generate R.java. So, i want to know how to generate R.java by a manual on Linux platform. Please help me.

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• R: Change the fields' (slots') values of the class assigning a value to some other field

  - by Max Li

  Assgning a value to one field, how can I make the other fields changing. Consider the following R5 class C<-setRefClass("C", fields=list(a="numeric",b="numeric") , methods=list( seta = function(x){ a<<-x b<<-x+10 cat("The change took place!") } ) # end of the methods list ) # end of the class Now create the instance of the class c<-C$new() This command c$seta(10) will result in that c$a is 10 and c$b is 20. So it actually works, however, I want to achieve this result by the command c$a<-10 (i.e. after that I want c$b to be equal to 20 as defined in the class in the logic of seta() function) How can I do it?

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• Why Timer does not work if we do not generate a window?

  - by Roman

  Here is the code: import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.Timer; public class TimerSample { public static void main(String args[]) { new JFrame().setVisible(true); ActionListener actionListener = new ActionListener() { public void actionPerformed(ActionEvent actionEvent) { System.out.println("Hello World Timer"); } }; Timer timer = new Timer(500, actionListener); timer.start(); } } It generates a window and then periodically prints "Hello World Timer" in the terminal (Command Prompt). If I comment this line new JFrame().setVisible(true); the application do not print anything to the command line. Why?

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• Bash redirection: save stderr/stdout to different files and still print them out on a console

  - by Alby

  Here is a simple program. class Redirection { public static void main (String args[]){ System.out.println("Hello World_Stdout"); System.err.println("Hello World_Stderr"); } } I want to see the all the outputs on a console, but at the same time I want to store stdout and stderr in different files. I tried the following command, to no avail. $java Redirection 3>&1 2>stderr 1>stdout 1>&3 2>&3 stderr& stdout files have the file size of 0. So basically I want to do what "tee" command does but I also want to capture stderr as well.

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• Preserving NULL values in a Double Variable

  - by Sam

  Hi, I'm working on a vb.net application which imports from an Excel spreadsheet. If rdr.HasRows Then Do While rdr.Read() If rdr.GetValue(0).Equals(System.DBNull.Value) Then Return Nothing Else Return rdr.GetValue(0) End If Loop Else I was using string value to store the double values and when preparing the database statement I'd use this code: If (LastDayAverage = Nothing) Then command.Parameters.AddWithValue("@WF_LAST_DAY_TAG", System.DBNull.Value) Else command.Parameters.AddWithValue("@WF_LAST_DAY_TAG", Convert.ToDecimal(LastDayAverage)) End If I now have some data with quite a few decimal places and the data was put into the string variable in scientific notation, so this seems to be the wrong approach. It didn't seem right using the string variable to begin with. If I use a double or decimal type variable, the blank excel values come across as 0.0. How can I preserve the blank values? Thanks

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• Capture subprocess output

  - by schneck

  Hi there, I learned that when executing commands in Python, I should use subprocess. What I'm trying to achieve is to encode a file via ffmpeg and observe the program output until the file is done. Ffmpeg logs the progress to stderr. If I try something like this: child = subprocess.Popen(command, shell=True, stderr=subprocess.PIPE) complete = False while not complete: stderr = child.communicate() # Get progress print "Progress here later" if child.poll() is not None: complete = True time.sleep(2) the programm does not continue after calling child.communicate() and waits for the command to complete. Is there any other way to follow the output?

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• D_WIN32_WINNT compiler warning with Boost

  - by bobber205

  Not sure what to make of this error. Added -D_WIN32_WINNT=0x0501 to Visual Studio's "Command Line" options under Project Properties but it says it doesn't recognize it and the warning still appears. I am also not sure how to add the Preprocessor Definition. :) Thanks for any help! 1Please define _WIN32_WINNT or _WIN32_WINDOWS appropriately. For example: 1- add -D_WIN32_WINNT=0x0501 to the compiler command line; or 1- add _WIN32_WINNT=0x0501 to your project's Preprocessor Definitions.

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• Is git revert broken?

  - by sabgenton

  The following pastebin is a repo with one file with one, two, three, four, five typed on each line. Each line was commited separately into git: http://pastebin.ca/raw/2136179 I then tried to delete the line two with the command git revert <commmit which creates two> And get: error: could not revert b4e0a66... second hint: after resolving the conflicts, mark the corrected paths hint: with 'git add <paths>' or 'git rm <paths>' hint: and commit the result with 'git commit' There should be no conflict for something this simple? Or am I doing it wrong/got the wrong command? The merge details don't seem to make sense either: one <<<<<<< HEAD two three four five ======= >>>>>>> parent of b4e0a66... second Isn't that saying delete everything but one? I was expecting only two to be affected... git 1.7.10

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• OnTextChanged not executed when !Page.IsPostBack

  - by senzacionale

  is it possible that OnTextChanged="" event is not executed when!Page.IsPostBack command is executed?

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