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• Can someone distill into proper English what a delegate is?

  - by Nissan Fan

  Can someone please break down what a delegate is into a simple, short and terse explanation that encompasses both the purpose and general benefits? I've tried to wrap my head around this and it's just not sinking in.

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• ASP.NET declare a CSS stylesheet one time only

  - by Grant

  Hi, if i have a single CSS stylesheet for a website and only want to declare it once, that is, not use the following code on every aspx page.. <link href="stylesheets/general.css" rel="stylesheet" type="text/css" /> Am i forced to use a .master page? or is there another way to do this..

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• Use '=' or LIKE to compare strings in SQL?

  - by furtelwart

  Hi! There's the (almost religious) discussion, if you should use LIKE or '=' to compare strings in SQL statements. Are there reasons to use LIKE? Are there reasons to use '='? Performance? Readability? Thanks in advance!

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• java api design - NULL or Exception

  - by srini.venigalla

  Is it better to return a null value or throw an exception from an API method? Returning a null requires ugly null checks all over, and cause a major quality problem if the return is not checked. Throwing an exception forces the user to code for the faulty condition, but since Java exceptions bubble up and force the caller code to handle them, in general, using custom exceptions may be a bad idea (specifically in java). Any sound and practical advice?

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• What is the best algorithm for an overridden System.Object.GetHashCode?

  - by bitbonk

  In .NET System.Object.GetHashCode method is use in a lot of places throughout the .NET base class libraries. Especially when finding items in a collection fast or to determine equality. Is there a standard algorithm/ best practise on how to implement the GetHashCode override for my custom classes so I don't degrate performance?

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• Do display objects outside of stage bounds still get rendered by Flash?

  - by Pup

  If an object exists outside of Flash's stage boundaries, is on the Display List, and is visible, is it causing a performance hit from Flash rendering it? In other words, does Flash render what isn't seen? This leads me to believe so: http://stackoverflow.com/questions/170203/how-do-you-make-flash-not-render-an-object-on-the-stage

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• Exploding by Array of Delimiters

  - by JoeC

  Is there any way to explode() using an array of delimiters? PHP Manual: array explode ( string $delimiter , string $string [, int $limit ] ) Instead of using string $delimiter is there any way to use array $delimiter without affecting performance too much?

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• Is 'epoll' the essential reason that Tornadoweb(or Nginx) is so fast?

  - by Mickey Shine

  Tornadoweb and Nginx are popular web servers for the moment and many benchmarkings show that they have a better performance than Apache under certain circumstances. So my question is: Is 'epoll' the most essential reason that make them so fast? And what can I learn from that if I want to write a good socket server?

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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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• What NEW features has WCF in .NET Framework 4 vs .NET Framework 3.5?

  - by Ole Jak

  What NEW features has WCF in .NET Framework 4 vs .NET Framework 3.5? What Is new, what was fixed (in general - I do not want to get into bug fixed numbers=)?

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• Reasons for Parallel Extensions working slowly

  - by darja

  I am trying to make my calculating application faster by using Parallel Extensions. I am new in it, so I have just replaced the main foreach loop with Parallel.ForEach. But calculating became more slow. What can be common reasons for decreasing performance of parallel extensions? Thanks

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• JQuery : What is the difference between "var test" and "var $test"

  - by Sayem Ahmed

  what is the difference between these statements? I know that "var $test" declares a jquery variable, but what is the difference of a jquery variable with a general javascript variable ?

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• Exception handling best practices

  - by Costa

  Hi Is there any performance problem or something else about letting the exception to propagate, or it is better to write it like this try { } catch { throw; }

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• springboard takes too much CPU

  - by tbarbe

  Is there a way to increase the application priority for the CPU on iPhone? I notice that SpringBoard takes up too much CPU at times causing some fluctuation in performance on the device.

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• How can I figure out if an ASP.NET application contains 32bit code/component

  - by timeitquery

  We have an ASP.NET 3.5 application which we need to run on 64bit, but when we do the performance is worst than when we enable 32 bit on the App Pool. It seems like there is something we use in the project which requires 32 bit, but we cannot find what.

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• What are the guidelines to follow when designing an application ?

  - by debugger

  Hello All, This is general question. What would one take in considiration when designing a new application? ( Why choose a certain technology , Why independance between functions , Why Modularity ...) Discuss

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• Best approach to write huge xml data to file?

  - by Kayes

  Hi. I'm currently exporting a database table with huge data (100000+ records) into an xml file using XmlTextWriter class and I'm writing directly to a file on the physical drive. _XmlTextWriterObject = new XmlTextWriter(_xmlFilePath, null); While my code runs ok, my question is that is it the best approach? Or should I write the whole xml in memory stream first and then write the xml document in physical file from memory stream? And what are the effects on memory/ performance in both cases?

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• Strange error from mysql storage engine

  - by zerkms

  General error: 1030 Got error -1 from storage engine the used storage engine is innodb the query was runned when i got it today morning was: SELECT feeds.* FROM feeds ORDER BY RAND() LIMIT 1 i know rand() is bad but it's very small table (<500 records) and not loaded project this error i receive approximately once a day. cannot google anything relevant :-(

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• Sum up values in an array list in java

  - by user1449997

  Hello to all tired and frustrated programmers, There is a problem I can't solve: In my array list there are Object arrays with the length of three and always on the last cell of the array there is a double. I need a loop which goes through the array list and sums up all doubles. (I need also some other thing from the arrays so a general idea how to loop through an array list would be perfect :-)) Any ideas? Thanks for your help, Greetings Demian

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• Toast versus Dialog boxes: which to use when?

  - by Samuh

  The answer could be subjective. The answer could be intuition. And I guess the answer could be found from the traditional modal versus non-modal debates. But in general how do you generally decide which one to go for? What are their use cases? Thanks.

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• How do I automate the padding for arbitary images using MATLAB?

  - by user198729

  This is a further question based on this answer: http://stackoverflow.com/questions/2589851/how-can-i-implement-this-visual-effect-in-matlab/2589957#2589957 The general solution should work for all background colors and length/width ratios.

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• Fastest way to read every 30th byte of large binary file?

  - by timmerk

  What is the fastest way to read every 30th byte of a large binary file (2-3 GB)? I've read there are performance problems with fseek because of I/O buffers, but I don't want to read 2-3 GB of data into memory before grabbing every 30th byte either.

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• When and where do you put type annotations in Clojure code?

  - by Michiel Borkent

  When and where do you put type annotations in Clojure code? Obviously when performance counts. But are there rules by which you can live of when (only when doing Java Interop?) and where to add them (function definition arguments)?

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• How can I create a FreeBSD package using EPM that has the ORIGIN @comment?

  - by Chris R

  I'm building packages of our internal software products using EPM, and over time these packages (of which we have a large number) clutter up the output of pkg_delete and pkg_add with the following general kind of messages: err: pkg_add: package MYPACKAGE has no origin recorded I can see from some old FreeBSD lists that the +CONTENTS file in the package must have a line like this: @comment ORIGIN:some_source_path What I don't see is a way to get this line in place using EPM. Can somebody tell me how to do this?

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• iphone device orientation

  - by Chandan Shetty SP

  During inAppPurchase, the storeKit will ask the username and password even though i set... [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationLandscapeRight]; It ask Username and password in Portrait Mode... In general How to solve this kind of issue. Thanks in advance,

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