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• Working with images in Scala

  - by dbyrne

  I am generating large PNG files from a Scala program. Currently, I am doing it the same way I would do it in java. I am creating a new BufferedImage and setting each pixel to the correct color. This works fine, but I am wondering if there are any good libraries for working with images in Scala? I am looking for something like Ruby's RMagick library.

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• Checking OpenGL resource leaks

  - by kamziro

  So I have a rather large openGL program going, and checking for normal memory leaks (those by new and delete) is rather trivial -- just run it on valgrind. But what is the best way to check for potential opengl leaks? Is there an opengl utility that'll tell you how many resources (e.g framebuffers) are being used at the time, or such? Or is the only way to attach a counter to every glGenBlah and glDeleteBlah pairs?

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• Streaming a POI workbook to the servlet output stream.

  - by The Machine

  I build a very large POI workbook, on my web server. Holding the entire memory in workbook , will not scale for multiple concurrent requests. Is there a way i can progressively write the workbook to the servlet output stream. That should reduce the response time , as well as make the process memory efficient.

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• logging in continouous loop

  - by Mikkel Jans

  What would be a good way to create logs (with python logging module) inside a constant running loop, without producing a large amount of useless log-files? An example would be a loop that constant list a folder, and does some action when it sees a file of a specific type. I want to log that no files were found, or files were found but of a wrong type, without logging that same line constantly for each folder check, as it might run many times a second.

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• file output in python giving me garbage

  - by Richard

  When I write the following code I get garbage for an output. It is just a simple program to find prime numbers. It works when the first for loops range only goes up to 1000 but once the range becomes large the program fail's to output meaningful data output = open("output.dat", 'w') for i in range(2, 10000): prime = 1 for j in range(2, i-1): if i%j == 0: prime = 0 j = i-1 if prime == 1: output.write(str(i) + " " ) output.close() print "writing finished"

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• Sparse linear program solver

  - by Jacob

  This great SO answer points to a good sparse solver, but I've got constraints on x (for Ax = b) such that each element in x is >=0 an <=N. The first thing which comes to mind is an LP solver for large sparse matrices. Any ideas/recommendations?

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• Is it possible to have too many functions in a PHP application?

  - by orbit82

  Can a PHP application have too many functions? Does the execution of a large number of PHP functions hog memory and resources? My WordPress theme in-development has a lot of functions (probably more than 100 by the time I'm done) and I'm concerned that I might have too many.

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• QTextEdit content into QDomDocument

  - by kaycee

  hi, i'm having QTextEdit widget with large content in it (content is XML). i want to take the content and set it into a QDomDocument, so i take the content using document = textEdit->document(); but i dont know how to take it from here into a QDomDocument... what's the best way to do it ?

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• java tracing spaghetti code

  - by Amarsh

  Folks, I have just joined this company which has a huge source tree based upon JSP/Servlet and EJB 1.2. No documentation exists. The code has been written over seven years, with a large number of undocumented changes. Are there any tool tah can assist me in tracing the execution? Putting a breakpoint is not helping me much.

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• Why are joins bad when considering scalability?

  - by acidzombie24

  Why are joins bad or 'slow'. I know i heard this more then once. I found this quote The problem is joins are relatively slow, especially over very large data sets, and if they are slow your website is slow. It takes a long time to get all those separate bits of information off disk and put them all together again. source I always thought they were fast especially when looking up a PK. Why are they 'slow'?

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• VS/C#: Can I be notified of every event that gets handled while debugging?

  - by Daniel I-S

  I am currently troubleshooting a large and unwieldy GUI-based tool in Visual Studio, and was wondering whether there is any way to get some kind of notification (either by writing to the console or through a third-party tool) whenever any handled event occurs. This would make it a lot easier to track down what precisely is going on while I am interacting with this beast. Is there an 'on any event being handled' event I can handle, or some kind of add-in for VS which would make this possible?

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• Determine precision and scale of particular number in Python

  - by jrdioko

  I have a variable in Python containing a floating point number (e.g. num = 24654.123), and I'd like to determine the number's precision and scale values (in the Oracle sense), so 123.45678 should give me (8,5), 12.76 should give me (4,2), etc. I was first thinking about using the string representation (via str or repr), but those fail for large numbers: >>> num = 1234567890.0987654321 >>> str(num) = 1234567890.1 >>> repr(num) = 1234567890.0987654

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• How popular is Groovy/Grails in the corporate world?

  - by Patrick O Connell

  Are there any figures for its adoption in corporate environments? Does anyone know of large corporations that have adopted it for projects?

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• Efficiently selecting a set of random elements from a linked list

  - by Matt Sheppard

  Say I have a linked list of numbers of length N. N is very large and I don’t know in advance the exact value of N. How can I most efficiently write a function that will return k completely random numbers from the list?

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• Is there a way to combine IN and LIKE in MySQL?

  - by abeger

  I'm currently running a query like this: SELECT * FROM email WHERE email_address LIKE 'ajones@%' OR email_address LIKE 'bsmith@%' OR email_address LIKE 'cjohnson@%' The large number of OR's bothers me. Is there a way to condense this up with something akin to an IN operator, e.g.: SELECT * FROM email WHERE email_address LIKE ('ajones@%', 'bsmith@%', 'cjohnson@%') Or is this just wishful thinking?

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• Determining linkage dependencies in Flex applications

  - by Kai

  I have a large Flex project with two Applications in it. A lot of code is shared between these Applications. However, the smaller of the Applications does not require much of the code that the larger one does. I'm trying to ensure that code that isn't required by the smaller application isn't getting compiled into it. Is there an easy way for me to determine which files within my project are being compiled into a particular Application?

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• Is there an easy way to turn an ObjectContext into a DataRow?

  - by esac

  I am using AOD.Net Entity Model, and am doing a large amount of inserts. I am using SqlBulkCopy to transfer the data. I could create a DataRow, copy the known rows across, but I was wondering if there was an easier/more generic way to do this?

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• Image upload storage strategies

  - by MatW

  When a user uploads an image to my site, the image goes through this process; user uploads pic store pic metadata in db, giving the image a unique id async image processing (thumbnail creation, cropping, etc) all images are stored in the same uploads folder So far the site is pretty small, and there are only ~200,000 images in the uploads directory. I realise I'm nowhere near the physical limit of files within a directory, but this approach clearly won't scale, so I was wondering if anyone had any advice on upload / storage strategies for handling large volumes of image uploads.

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• Copying 6000 tables and data from sqlserver to oracle ==> fastest method?

  - by nazer555

  i need to copy the tables and data (about 5 yrs data, 6200 tables) stored in sqlserver, i am using datastage and odbc connection to connect and datstage automatically creates the table with data, but its taking 2-3 hours per table as tables are very large(0.5 gig, 300+columns and about 400k rows). How can i achieve this the fastes as at this rate i am able to only copy 5 tables per day but within 30 days i need move over these 6000 tables.

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• How to change the outlining hover color in VS 2010?

  - by RCIX

  If i hover over the thin vertical bar on the left, it highlights the entire scope of the block that's to the right. When this scope is large, my entire screen flashes white (a consequence of my custom color scheme). Is there a way to change that color? i don't recall there being one when i made the theme.

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• How to store a scaleable sized extensible event log?

  - by firoso

  Hello everyone! I've been contemplating writing a simple "event log" that takes a paramater list and stores event messages in a log file, trouble is, I forsee this file growing to be rather large (assume 1M entries or more) the question is, how can I implement this system without pulling teeth, I know that SQL would be a possible way to go. XML would be ideal but not really practical for scaleability if i'm not going nuts. Example Log Entry -----Time Date-------- ---------Sender----------------------- ---------Tags---------- --Message---------- 12/24/2008 24:00:00 $DOMAIN\SYSTEM\Application$ :Trivial: :Notification: It's Christmas in 1s

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• Is it possible to simulate TMenuBreak functionality with Dev Express TdxBarSubItems?

  - by mcmar

  In my application I'm dynamically adding new TdxBarSubItems based off of a SQL query. In some cases the result set is rather large so the menu fills the entire screen and sometimes has a down arrow to scroll the list. In a previous version of the code before switching to Dev Express, I was able to add TMenuBreak objects to make the list divide into columns. Is there a way to do this with Dev Express components?

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• Flex application scalability and compatability

  - by user327246

  How good is a Flex app in handling large amount of data (say, for a reporting kind of application) Are there any memory management issues that need to be kept in mind while developing for such an app Are there any issues in running a Flex app on a Mac?

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• Abort call to unmanaged DLL

  - by phq

  I have an unmanaged DLL with a function that can run for a long time if the input parameter is a large value, sometimes that is desirable but not always. How can I in c# call this function so that I can abort it when needed? So far I have tried to put the call in a separate thread, but neither interrupt nor abort seem to stop the process, which runs at 100% CPU until the dll is done. Is it possible to terminate the running dll code?

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• convert following string into array using explode()

  - by Deepali

  HI, I have a string: NEW ALPINESTAR?S SMX PLUS WHITE MOTORCYCLE BOOTS! 44/9.5$349.95 Time Left 1h 2m NEW AGV BLADE FLAT MATTE WHITE LARGE/LG HELMET$75.53Time Left 1h 2m I want result in array like this: Productname Price time NEW ALPINESTAR?S SMX PLUS WHITE MOTORCYCLE BOOTS! 44/9.5 $349.95 Time Left 1h 2m

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