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• How to know about results of work with COM component?

  - by chester89

  I suppose this question is more general than working with COM components. I have a .NET client written in C# and COM component written in pure Win32 API. Client side uses this component to perform some actions. How to know on the client that component did its job? I think it may be socket/pipe, with component writing to it about results, and client reading from it displaying progress to the user. What is the best way to do this?

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• Java NIO Servlet to File

  - by Gandalf

  Is there a way (without buffering the whole Inputstream) to take the HttpServletRequest from a Java Servlet and write it out to a file using all NIO? Is it even worth trying? Will it be any faster reading from a normal java.io stream and writing to a java.nio Channel or do they both really need to be pure NIO to see a benefit? Thanks.

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• how to move scroll at the bottom of list Programmatically?

  - by UMMA

  dear friends, i after calling notifydatasetchanged(); i want to move scroll of list to the bottom of list so that user could see last record in the listview.actually i am writing Chat module so for that purpose i need latest record at the bottom of list. can any one guide me how to achieve this? any help would be appriciated.

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• What's the best IDE for DigitalMars D programming?

  - by backslash17

  Digital Mars D seems to be very good programming language in a lot of ways, but my only problem with it is the amount of time wasted writing arguments to the compiler in the command line at the old fashion way. Is there any good IDE for D? Thanks in advance!

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• How do I check if my program has data piped into it.

  - by monkeyking

  Im writing a program that should read input via stdin, so I have the following contruct. FILE *fp=stdin; But this just hangs if the user hasn't piped anything into the program, how can I check if the user is actually piping data into my program like gunzip -c file.gz |./a.out #should work ./a.out #should exit program with nice msg. thanks

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• Several ifstream vs. ifstream + constant seeking

  - by SpyBot

  I'm writing an external merge sort. It works like that: read k chunks from big file, sort them in memory, perform k-way merge, done. So I need to sequentially read from different portions of the file during the k-way merge phase. What's the best way to do that: several ifstreams or one ifstream and seeking? Also, is there a library for easy async IO?

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• iPhone init method return type

  - by William Jockusch

  Suppose we are writing a class (let's call it Class) in an iPhone program. In all the samples out there, the init methods are typically declared like this: -(id) initWithFoo: (Foo *) foo My question is: would it be more logical to do the following? Why or why not? -(Class *) initWithFoo: (Foo *) foo

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• mysql db image convert to file

  - by ntan

  Hi i am writing a converter from Oracle to mysql In Oracle the images are stored in db. I want to read the content of the image and save to file system I suppose that i have to read the blob entry and using php file commands create the file (am i right) What about image type. Should i save as jpg (what if the store image is not jpg) Any suggestion are welcome

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• Using match variable $1 for a substitution in Perl

  - by justintime

  What is the cleanest way of picking up a match variable form a subsitution in Perl I sometimes find myself writing s/(something)// ; my $x = $1 ; then I realise that if the s/ / / fails $1 might be carrying over a value from a previous match. So I try my $x = 'defaultvalue' ; if ( s/(something)// ) { $x = $1 ; } Is this be cleanest way of doing it.

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• How can one extra rdf:about or rdf:ID properties from triples using SPARKQL?

  - by lennyks

  It seemed a trivial matter at the beginning but so far I had not managed to get unique identifier for a given resource using SPARKQL. What I mean is given and then some properties identifiying this resource in perfect world I want to first know how to retrieve an individual triple given some uri. I have tried naive approaches by writing statements in a WHERE clause such as ?x rdf:about ?y and ?x rdfs:about ?y. I hope I am being precise.

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• Linux service and Source for cron job

  - by Sirish Kumar

  Hi, I am new to linux and writing a service in C++ which spawns multiple threads and I am starting the service by calling it from init.d, but how should I send the terminate signal to my application from the script , so that my service terminates all the threads and exits. And also where can I find the source code for any linux services. e.g. /etc.init.d/rc5.d/S14cron . It will be helpful in understanding how to implement a service.

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• JMF. Create new custom streamdatasource

  - by Afro Genius

  Hi there. I am looking to create a means of building a DataSource object (and hence a Processor) that gets data from a stream instead of a file, RTP, and so on. I am writing a module for a much larger application that is meant to transparently transcode audio data. Going through the JMF docs only specify how to create a source from file however I need to be able to create a source from a stream within my application. Any idea where I can start looking?

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• java generated excel sorting color mess.

  - by afzal

  I am using jxl api for generating a excel sheet, in which the alternate rows are highlighted, when I sort the contents of a excel and sort manually, the cell background colors messup, usually this is because I am writing the color cell by cell, is there anyway through which i color the alternate rows of the excel while generating it, in such a way that it doesnt effect the sorting of the contents.

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• Concise way to getattr() and use it if not None in Python

  - by MTsoul

  I am finding myself doing the following a bit too often: attr = getattr(obj, 'attr', None) if attr is not None: attr() # Do something, either attr(), or func(attr), or whatever else: # Do something else Is there a more pythonic way of writing that? Is this better? (At least not in performance, IMO.) try: obj.attr() # or whatever except AttributeError: # Do something else

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• Help with django filters

  - by Cato Johnston

  In a django template, I want to get an value from the first object in a list's field. I have the following code {{ list.object|first.field }} But it results in an error. Is there a way to achieve this without writing a loop or doing it in the view?

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• Intellisense not showing exceptions in vs2008 C#

  - by Hanan

  The intellsiense in my vs 2008 does not show the exceptions that might be drawn when im using a function. writing in C# 3.5.

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• How efficient is PHP's substr?

  - by zildjohn01

  I'm writing a parser in PHP which must be able to handle large in-memory strings, so this is a somewhat important issue. (ie, please don't "premature optimize" flame me, please) How does the substr function work? Does it make a second copy of the string data in memory, or does it reference the original? Should I worry about calling, for example, $str = substr($str, 1); in a loop?

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• how to time out an ant task

  - by Christopher Dancy

  Without writing a custom ant task is there a way to use a timeout on a regular ant target? To give some background info ... we are using the delete task to remove all contents of a given directory. Sometimes this directory is massive with lots of generated folders and files. We wanted to have that task say timeout after 5 minutes. I could not find anything online anywhere ... any ideas?

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• request parameter using jquery/javascript

  - by Bunny Rabbit

  is it possible to stop the submission of a form,after submit button has been clicked and get the action attribute and the request parameters of the submission using javascript(preferably jQuery) ? I want to get the action and the parameter so that the it can be submitted to an alternate location ,what i am tryin to do is try writing a proxy website.

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• jQuery related item table highlighter

  - by Forkrul Assail

  I have a table fill with cell items. If I click on a cell item, that cell item is 'linked' or related to other cell items, which need to be highlighted. If another cell item is clicked, that cell's related cells need to light up. Is there a jQuery plugin to accomplish something like this? Or would I have to look into writing one myself?

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• Determining credit/debit card type

  - by ct2k7

  Hi, I'm writing a POS application for the iPhone/iPod combination, using the same exact hardware used in Apple Stores:: EasyPay. Ok, my hurdle is this: how do I identify which credit card type is being used as text is entered in the uitextfield? I assume I've to use textField:shouldChangeCharactersInRange:replacementString:? However, I've got ideas floating around, but I simple cannot put them together to form code :/ Any help is appreciated! Thanks in advanced :D

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• How to configure log4j with a properties file

  - by Dan

  How do I get log4j to pick up a properties file. I'm writing a Java desktop app which I want to use log4j. In my main method if have this: PropertyConfigurator.configure("log4j.properties"); The log4j.properties file sits in the same directory when I open the Jar. Yet I get this error: log4j:ERROR Could not read configuration file [log4j.properties]. java.io.FileNotFoundException: log4j.properties (The system cannot find the file specified) What am I doing wrong?

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• Mobile web - hidden numerical input

  - by user499846

  Hi I am writing a web app (mainly iphone targeted) where the user has to enter their dob as part of the log in, I need this to be <input type = 'password'however I also want to enable the numeric section of the keyboard. I would usually change the type attr to 'number' however as this needs to be hidden I wondered if there was another way to activate the numeric pad Cheers! (ps I do not want to use any frameworks such as jquery on this)

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• DVD burn IMAPI2 + getting error, multiple of the sector size

  - by sijith

  hi, I am writing a program which burns data to DVD. When i run my program its showing error code 0xC0AA0403(The size of the provided IStream object is invalid. The size must be a multiple of the sector size, 2048.) Please help me on this. How to specify data as multiple of 2048. I am just passing a single DOC file to burn

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• First version of Linux

  - by dole doug

  Hi there I've heard many times that Linus Torvalds is a genius when it comes to writing good code. I also wish to write good code and I'd like to see how the first version of Linux was written. Does anyone know where I can find the first version of Linux? I'm looking for the first version (not 1.0) because I think it will be smaller and easier to understand. Many thanks.

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