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• Terminology: opposite of "zero copy"?

  - by Mark Harrison

  We're benchmarking some code that we've converted to use sendfile(), the linux zero-copy system call. What's the term for the traditional read()/write() loop that sendfile() replaces? I.e., in our report I want to say "zerocopy is X millisecs, and ??? is Y millisecs." What word/phrase should I use?

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• SQL 2005 Merge / concatenate multiple rows to one column

  - by Dave

  Hi, We have a bit of a SQL quandry. Say I have a results that look like this... 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | A 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | B 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | C 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | D 7ce953ca-a55b-4c55-a52c-9d6f012ea903 | E 7ce953ca-a55b-4c55-a52c-9d6f012ea903 | F is there a way I can group these results within SQL to return as 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | A B C D 7ce953ca-a55b-4c55-a52c-9d6f012ea903 | E F Any ideas people? Many thanks Dave

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• How can I take a screenshot of website with Perl?

  - by Egor Makarov

  How can I take a screenshot from a site (in batch mode) using Perl? I.e. solution should produce image file (say .png) given an URL. It would be nice, if no X Window system will be required for solution to work.

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• Create draggables by draging mouse

  - by Joe

  Hi: I am new to JQuery library. I am currently trying to create a Draggable by mouse. Say, when I press the mouse it start to draw and then I drag the mouse to change the size and then I release the mouse to finalize the drawing. Is it possible to do this with JQuery? Thank you in advance. Joe

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• Ruby On Rails and UTF-8

  - by Semyon Perepelitsa

  I have an Rails application with SayController, hello action and view template say/hello.html.erb. When I add some cyrillic character like "?", I get an error: ArgumentError in SayController#hello invalid byte sequence in UTF-8 Headers: {"Cache-Control"=>"no-cache", "X-Runtime"=>"11", "Content-Type"=>"text/html; charset=utf-8"} I use Windows 7 x64, Ruby 1.9.1p378, Rails 2.3.5, WEBrick server.

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• Drawing a seat area in wpf.Advice needed

  - by devnet247

  Hi, New to wpf I am after some advice,pointers-articles-codesnippets that can help me to write a usercontrol containing a seating area Lets say a cinema has 200 seats and it a square. I need to be able to draw 200 seats . What is the best way to draw seats?Would you draw 200 rectangles? Any suggestions

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• Fluent NHibernate: Mapping a column with a different name

  - by Fred

  Let's say I have a table: Project Id Title ProjectManagerId ContactId ProjectManagerId and ContactId are both id's from a table named Person: Person PersonId Firstname Lastname How can I map these two columns to create a person object? (either using automapping or fluent's normal mapping). Thanks

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• mv() while reading

  - by K'

  on Linux ext3 filesystem, what happens if mv() is called on the same file (file descriptor) while reading the file? It is actually an exam question and I can only say something like: CPU traps OS for interrupt handling etc, etc. I would appreciate if OS guys out there can help me out, please :D

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• Eclipse plugin for edit XML

  - by jitm

  Hello, Could you please help me and say what kind of free eclipse plugins for editing xml is better? Thanks.

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• Opengl Coordinate System

  - by praveen

  Say I am using an Identity Matrix for my modelViewTransformation Matrix on an Open GL ES2.0 program. The Co-ordinate system in this case is the canonical opengl co-ordinate system which extends from (-1,-1,-1) to (1,,1,1). My question is, is this coordinate system right-handed or left-handed? A broader question: Is there a document with OpenGL which can list all the mathematical conventions followed by the API?

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• Recursively find files/directories within a directory

  - by enchilada

  I want to use enumeratorAtURL:includingPropertiesForKeys:options:errorHandler: to do this, as I'm coding under Snow Leopard. I know how to use this method. However, as for my purposes it's not adequate to load the contents lazily, I have the following question: How can I create an object hierarchy (of, say, the custom FileOrDirectory class with the standard children,count,isLeaf attributes) from the information I load from the enumeratorAtURL: method? I need to load this data beforehand, and show it in an outline view, for my purposes.

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• copying a short int to a char array

  - by cateof

  I have a short integer variable called s_int that holds value = 2 unsighed short s_int = 2; I want to copy this number to a char array to the first and second position of a char array. Let's say we have char buffer[10];. We want the two bytes of s_int to be copied at buffer[0] and buffer[1]. How can I do it?

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• Recovering From An SQL Injection

  - by Bryan

  Let's not go so far as to say that I'm paranoid, but I've been spending hour after hour learning how to prevent SQL injections (and XSS for what it's worth). What I'm wondering is that a SQL injection doesn't seem like it would do permanent harm to my database if I've made daily backups. Doesn't importing yesterday's copy of my tables just restore them and then I can be on my merry way?

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• C# Multi-Comparisons possible?

  - by Iggy Ma

  is it possible in some way to compare multiple variables to one constant in a if statement? It would be very helpful if instead of if ( col.Name != "Organization" && col.Name != "Contacts" && col.Name != "Orders" ) { } I could just say if ( col.Name != "Organization" || "Contacts" || "Orders" ) { } And I know I could use a list but in some instances I dont want to... Thanks!

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• How to execute JUnit and TestNG tests in same project using maven-surefire-plugin ?

  - by Ravi Nikam

  Right now I have both type of tests but when I say "mvn test" it only executes TestNG tests and not Junit. I want to execute both one after another. Any Idea ?

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• Finding a simple object in a low-quality image

  - by Ramon Snir

  Hi, I want to do this thing in C# (or any other .NET language), not sure how: I have an image I captured from webcam and I want to find a specific simple object in it (let's say a red circle with a black square in it). The red circle can be a bit different from time to time (because of shadows) and the square might be also a bit brighter sometimes and even rotated a bit. Please help me!

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• avoiding the tedium of optional parameters

  - by Kyle

  If I have a constructor with say 2 required parameters and 4 optional parameters, how can I avoid writing 16 constructors or even the 10 or so constructors I'd have to write if I used default parameters (which I don't like because it's poor self-documentation)? Are there any idioms or methods using templates I can use to make it less tedious? (And easier to maintain?)

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• How to Get a Specific Column Value from a DataTable?

  - by peace

  I have a datatable. I need to fetch a certain column value based on the user input. For example, lets say the datatable has two columns CountryID and CountryName. I need to find CountryID in the datatable based on the user input country name. I could just open a connection with DB and run the query select countryID from Country where countryName = @userinput. Is there anyway i could do this on the datatable.

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• How can I calculate new time zone in python ?

  - by john terry

  Hello, Lets say I have a time 04:05 and the timezone is -0100 (GMT) I want to calculate the new time which will be 03:05 Is there any function in python to do that calculcation ? Thanks

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• Merging code with dependencies? - Javascript

  - by RadiantHex

  Hi folks, this might be quite simple, but I must say I'm a bit confused on this topic. I'm writing code based on two popular libraries: jQuery underscore.js I am just wondering what would be the best way to isolate the code and prevent conflicts and how to merge it with its dependencies. By merging I mean putting them within the same file. :) I hope I'm not asking something which is too basic. ...and a last thing MERRY CHRISTMAS EVERYONE! =D

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• Determine when application icon is clicked to launch the app in android

  - by frieza

  Is there any way in android to determine when the user clicked the app icon to launch the app ? I mean say a user was using my app. Then he presses the home key as a result of which the app goes to the background. After sometime he clicks the app icon again. My question is do I get a call-back for this ?

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• Using a bitwise AND on more than two bits.

  - by Koning WWWWWWWWWWWWWWWWWWWWWWW

  Hi, I am pretty new to bitwise operators. Let's say I have 3 variables a, b and c, with these values in binary: a = 0001 b = 0011 c = 1011 Now, I want to perform a bitwise AND like this: a AND b AND c -------- d = 0001 d &= a &= b &= c doesn't work (as I expected), but how can I do this? Thanks

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• SQL Server - In clause with a declared variable

  - by Melursus

  Let say I got the following : DECLARE @ExcludedList VARCHAR(MAX) SET @ExcludedList = 3 + ', ' + 4 + ' ,' + '22' SELECT * FROM A WHERE Id NOT IN (@ExcludedList) Error : Conversion failed when converting the varchar value ', ' to data type int. I understand why the error is there but I don't know how to solve it...

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• CSS ul userlist formatting

  - by Titan

  Hi, I am trying to break away from using tables in my formatting, and am trying out using userlist html tags <ul> Say I have a panel with 10 controls, and I want a 3 columns display, therefore 3 controls in each row, and a total of 4 rows for 10 controls. Should I use 4 different <ul> or should I just stack them inside one <ul> Please tell me the advantages and disadvantages Thanks

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• Flex, Popups: rollout event, not always working

  - by Patrick

  hi, I'm using PopupManager to create popups.. I noticed that sometimes the popups are not removed when on mouseOut event, for some reasons. I tried to roll over/out fast but the popups perfectly work. So I'm not able to say why sometimes they remain visible instead of disappear. Thanks

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