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• Triggering Signal Handler For I/O.

  - by Ohanes Dadian

  Using C on Linux, how would I go about triggering a signal handler every time I write data to a buffer using the write() function. The handler will be reading all data written to the buffer at the time of execution.

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• C program to display a jpeg or bmp or pcx file.

  - by Raj

  What is the code in 'c' to display a picture file like jpeg file or bmp file or pcx file. For example the picture may be available in desktop and the program during execution must be given the path of the file as input and should display the image.(If it is in command line,it'll be excellent). Platform:Windows xp Turbo c compiler(or turboc++)

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• Are Automator variables persistent?

  - by kiamlaluno

  Do Automator variable persist between executions of a workflow? If a variable is set during the execution of a workflow, can I get the last value assigned to a variable, once the workflow is executed again?

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• Why is Perl commonly used as CGI scripts?

  - by Michael Vasquez

  I plan to add a better search feature to my site, so I thought that I would write it in C and use the CGI as a means to access it. But it seems that Perl is the most popular language when it comes to CGI-based stuff. Why is that? Wouldn't it be faster programmed in C or machine code? What advantages, if any, are there to writing it in a scripting language? Thanks.

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• How do I configure SSIS logging to overwrite the log file?

  - by theog

  My SSIS package has logging configured with a SSIS log provider for text files, which works fine, but each time the package is run the log appends to the end of the log file. I want it to truncate the file and only keep the log from the most recent execution of the package, but I don't see an option anywhere to do that. I've tried both file usage types (Existing file and New file) in the File Connection manager with the same results.

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• Writing direct to disk with php

  - by Jurander

  I would like to create an upload script that doesn't fall under the php upload limit. There might be an occasion where I need to upload a 2GB, or larger file and I don't want to have to change the whole server execution to above 32MB. Is there a way to write direct to disk from php? What method might you propose someone would use to accomplish this? I have read around stack overflow but haven't quite found what I am looking to do.

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• Difference between Resume and Goto in error handling block

  - by Rich Oliver

  I understand that in the following example a Resume statement should be used instead of a Goto statement. Sub Method() On Error Goto ErrorHandler ... CleanUp: ... Exit Function ErrorHandler: Log error etc Err.Clear 'Is this line actually necessary?' Resume CleanUp 'SHOULD USE THIS' Goto CleanUp 'SHOULD NOT USE THIS' End Sub My question is what difference is there in the execution of the two?

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• Are there other search options for heroku

  - by Jonathan

  I am about to launch a beta site, and heroku looks like a great option. The only think that is getting me down is that the only search option is $20/mth for the Websolr add-on. I am sure that Websolr is great, but at this very early point in this project, I rather not light up that expense. Are there any free search options to couple with heroku's Blossom (free) plan. I feel like such a cheapskate!

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• Looking for programmer in NYC

  - by Oren

  I have taken the idea of "language maintenance" a niche that no one is paying attention to and created a company focused on live conversation with complimentary tools. Looking to create a web 2.0 style social network with an already clearly defined brand identity, design and plan. Already have assembled a team but am looking for a passionate programmer to take the technical lead and create a functional alpha and beta.

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• Insert data into SQL server with best performance

  - by Incognito

  I have an application which intensively uses DB (SQL Server). As it must have high performance I would like to know the fastest way to insert record into DB.Fastest from the standpoint of execution time. What should I use ? As I know the fastest way is to create stored procedure and to call it from code (ADO.NET). Please let me know is there any better way or may be there are is some other practices to increase performance.

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• Ant hangs randomly with executing

  - by deltamatrix

  Hi, I have noticed in recent times that when invoking my ant scripts to build and unit test my Java app, it randomly hangs at various points in the execution. The ant scripts are been invoked from my local machine on my remote clearcase view. Has anyone else had this problem? Please advise if you can.

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• Credit card validation using web services

  - by Dilse Naaz

  Hi, please help me by giving the information about the execution of credit card validation using web services. Thanks in advance.

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• scp command with alert message

  - by muruga

  I want to get the alert message for every execution of the scp command. If some one access my file using the scp command, that time I have to receive one mail. How can I achieve this. Please help me.

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• Testing in Scrum

  - by alex

  In Scrum it's a good idea to test frequently when iteration is finished at customer. But the question is what kind of test should I use when some of the prototype is done with customer? In my knowledge Acceptance test is ok when all the iteration is done - but not some part of it. Examples for the test plan would be helpful

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• iphone,cocoa, how do you think on KVC and KVO in cocoa ?

  - by Robin

  if your app use this solution , do do you plan port the app to other platform ? for example, iPhone app -- Android or Backberry. I do not want user it , but some code is exist ...

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• Table per Type Inhertiance and Data Genertion Plans

  - by CodeGrue

  I have an Entity Framework model using Table per Type Inheritance, but when I use a VS Data Generation Plan it produces duplicate keys in the child tables, which is a problem for EF. Does anyone know of a way to get this to work, so that the child tables do not have overlapping keys?

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• Adding or Removing HID programatically

  - by Jayesh

  Hello, I intend to remove a HID from my system programatically. The HID is connected via a bluetooth. Can you please help me on this. I plan to use C# but any thing else that is better shall also help. Thanks

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• cflock do not throw timeout for same url called in same browser

  - by Pritesh Patel

  I am trying lock block on page test.cfm and below is code written on page. <cfscript> writeOutput("Before lock at #now()#"); lock name="threadlock" timeout="3" type="exclusive" { writeOutput("<br/>started at #now()#"); thread action="sleep" duration="10000"; writeOutput("<br/>ended at #now()#"); } writeOutput("<br/>After lock at #now()#"); </cfscript> assuming my url for page is http://localhost.local/test.cfm and running it on browser in two different tabs. I was expecting one of the url will throw timeout error after 3 second since another url lock it atleast for 10 seconds due to thread sleep. Surprisingly I do not get any timeout error rather second page call run after 10 seconds as first call finish execution. But I am appending some url parameter (e.g. http://localhost.local/test.cfm?q=1) will throw error. Also I am calling same url in different browser then one of the call will throw timeout issue. Is lock based on session and url? Update Here is output for two different cases: Case 1: TAB1 Url: http://localhost.local/test/test.cfm Before lock at {ts '2013-10-18 09:21:35'} started at {ts '2013-10-18 09:21:35'} ended at {ts '2013-10-18 09:21:45'} After lock at {ts '2013-10-18 09:21:45'} TAB2 Url: http://localhost.local/test/test.cfm Before lock at {ts '2013-10-18 09:21:45'} started at {ts '2013-10-18 09:21:45'} ended at {ts '2013-10-18 09:21:55'} After lock at {ts '2013-10-18 09:21:55'} Case 2: TAB1 Url: http://localhost.local/test/test.cfm Before lock at {ts '2013-10-18 09:27:18'} started at {ts '2013-10-18 09:27:18'} ended at {ts '2013-10-18 09:27:28'} After lock at {ts '2013-10-18 09:27:28'} TAB2 Url: http://localhost.local/test/test.cfm? (Added ? at the end) Before lock at {ts '2013-10-18 09:27:20'} A timeout occurred while attempting to lock threadlock. The error occurred in C:/inetpub/wwwroot/test/test.cfm: line 13 11 : 12 : <cfoutput>Before lock at #now()#</cfoutput> 13 : <cflock name="threadlock" timeout="3" type="exclusive"> 14 : <cfoutput><br/>started at #now()#</cfoutput> 15 : <cfthread action="sleep" duration="10000"/> ... Result for case 2 as expected. For case 1, strange thing I just noticed is tab 2 output "Before lock at {ts '2013-10-18 09:21:45'} indicates that whole request start after 10 seconds (means after the complete execution of first tab) when I have fired it in second URL just after 2 seconds of first tabs.

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• Can I store and call regex in variables for later use?

  - by adbox

  I plan on storing regular expression codes in a database, but not sure how to get them from variable to function. advise? $i = "([wx])([yz])" $j = "[^A-Za-z0-9]" $k= "([A-Z]{3}|[0-9]{4})" //Wold this execute properly, this really is the extend of my question? preg_match($i, $string);

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• How to switch between different applications(mxml file with Application as the root tag) in a big Fl

  - by Yousui

  Hi guys, I'm new to flex. Now I'm writing an flex application. I plan to split my application into some MXML files(Application as the root tag). How can I switch from one mxml to another? BTW, what is the best practice for design large flex application? Just one MXML Application and many MXML component or many MXML Application? Thanks!

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• How to use jaxb_commons plugins from maven

  - by user243155

  I'm trying to use a jaxb plugin to insert a interface into a choice element generating the classes from maven. The problem is that I can't seem to figure out how to do so from maven, the repository isn't clear from the documentation and the only example (bellow) doesn't work, it seems to ignore the plugin (maven reports no error about not finding it) or the plugin doesn't have all the adds-ons currently listed in the project documentation: <plugin> <groupId>org.jvnet.jaxb2.maven2</groupId> <artifactId>maven-jaxb2-plugin</artifactId> <version>0.6.1</version> <executions> <execution> <goals> <goal>generate</goal> </goals> </execution> </executions> <configuration> <generatePackage>br.com.wonder.nfe.xml</generatePackage> <args> <arg>-Xifins</arg> </args> <plugins> <plugin> <groupId>org.jvnet.jaxb2_commons</groupId> <artifactId>basic</artifactId> <version>0.4.1.5</version> </plugin> </plugins> </configuration> </plugin> I have these in the root pom: <pluginRepositories> <pluginRepository> <id>maven2-repository.dev.java.net</id> <url>http://download.java.net/maven/2</url> </pluginRepository> <pluginRepository> <id>maven-repository.dev.java.net</id> <name>Java.net Maven 1 Repository (legacy)</name> <url>http://download.java.net/maven/1</url> <layout>legacy</layout> </pluginRepository> </pluginRepositories> Running that gives: Error while setting CmdLine options '[-Xifins, -episode, /home/administrador/JavaApp/wnfe3/wnfe-ejb/target/generated-sources/xjc/META-INF/sun-jaxb.episode]'! Embedded error: unrecognized parameter -Xifins

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• Find a free X11 display number

  - by James

  I have some unit tests that need an X11 display so I plan to start Xvfb before running them, but to start Xvfb I will need a free display number to connect it to. My best guess is to see what's free in /tmp/.X11-unix but I'm not sure how to handle the race if many tests try to start simultaneously. sshd must do this, does anyone know how?

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• Oracle : Identifying duplicates in a table without index

  - by user288031

  When I try to create a unique index on a large table, I get a unique contraint error. The unique index in this case is a composite key of 4 columns. Is there an efficient way to identify the duplicates other than : select col1, col2, col3, col4, count() from Table1 group by col1, col2, col3, col4 having count() 1 The explain plan above shows full table scan with extremely high cost, and just want to find if there is another way. Thanks !

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• What are the most useful software development metrics?

  - by kchad

  I would like to track metrics that can be used to improve my team’s software development process, improve time estimates, and detect special case variations that need to be addressed during the project execution. Please limit each answer to a single metric, describe how to use it, and vote up the good answers.

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• == Operator and operands

  - by rahul

  I want to check whether a value is equal to 1. Is there any difference in the following lines of code Evaluated value == 1 1 == evaluated value in terms of the compiler execution

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