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• How expensive is synchronization?

  - by someguy

  I am writing a networking application using the java.nio api. My plan is to perform I/O on one thread, and handle events on another. To do this though, I need to synchronize reading/writing so that a race condition is never met. Bearing in mind that I need to handle thousands of connections concurrently, is synchronization worth it, or should I use a single thread for I/O and event handling?

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• Generating XMI or graphic UML diagrams (not code documentation) in C#.NET

  - by kozziou

  Is there any solution available for generating UML diagrams (or at least XMI files) in C#.NET? Bear in mind that I don't want to reverse engineer my code but automate UML diagrams generation (different kind of them, mostly component diagrams).

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• is there a way to condense a vector (C++)?

  - by zebraman

  I have a sparsely populated vector that I populated via hashing, so elements are scattered randomly in the vector. Now what I want to do is iterate over every element in that vector. What I had in mind was essentially condensing the vector to fit the number of elements present, removing any empty spaces. Is there a way I can do this?

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• How to open exernal link in new window through PHP ?

  - by metal-gear-solid

  I want to open All external link into new window/tab through php without touching every external link code. and i don't want to this without target="blank". I can do this through javascript but i want to know if there is a PHP solution.

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• Rails forms: render different actions based on validation

  - by Martin Petrov

  Is it possible to render different actions based on what fails at validation? For example - I have one field in the form - email addres. It is validated like this: validates :email, :presence => true, :uniqueness => { :case_sensitive => false } In the controller: def create @user = User.new(params[:user]) if @user.save redirect_to somewhere else # render :new if email is blank # redirect_to somwhere if email is taken end end

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• C# How can i remove newline characters from binary?

  - by Tom

  Basically i have binary data, i dont mind if it's unreadable but im writing it to a file which is parsed and so it's importance newline characters are taken out. I thought i had done the right thing when i converted to string.... byte[] b = (byte[])SubKey.GetValue(v[i]); s = System.Text.ASCIIEncoding.ASCII.GetString(b); and then removed the newlines String t = s.replace("\n","") but its not working ?

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• How can I introduce a small number with a lot of significant figures into a C program?

  - by Lana

  I'm not particularly knowledgable about programming and I'm trying to figure out how to get a precise value calculated in a C program. I need a constant to the power of negative 7, with 5 significant figures. Any suggestions (keeping in mind I know very little, have never programmed in anything but c and only during required courses that I took years ago at school)? Thanks!

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• Issue in event.PreventDefault()

  - by Prathiba

  I'm using twitter bootstrap in my application. i gave e.preventDefault for link button in $(document).reday(), but it is not working. Here is my code: Master page: <a id="lnkLogout" href="javascript:void(0);" onclick="PageLogout();"><i class="icon-off"> </i>Logout</a> <script type="text/javascript" language="javascript"> $(document).ready(function () { $('#lnkLogout').click(function (e) { e.preventDefault(); }); }); function PageLogout() { //Code for logout from the application.... } </script> SampleDefaultPage.aspx : <div class="row-fluid"> <div class="form-horizontal"> <h4 class="header blue bolder smaller"> Contact</h4> <div class="control-group"> <label for="form-field-email" class="control-label"> Email</label> <div class="controls"> <input type="text" style="width:200px;" data-val="true" data-val-required="Mobile Number is required." id="txtEmail"> <div class="space-3"> </div> <span data-valmsg-replace="true" data-valmsg-for="txtEmail" class="field-validation-valid text-warning red"></span> </div> </div> <div class="control-group"> <label for="form-field-website" class="control-label"> Phone Number</label> <div class="controls"> <input type="text" style="width:200px;" id="txtPhno"> </div> </div> </div> I have given txtEmail as mandatory field. if i left that field blank and click on Logout button in Master page, it says txtEmail is required. i dint do any validation in Logout onclick event. I have given preventDefault for Logout link. But still facing an issue. I should be able to logout even though txtEmail is left blank. Thank you all in advance for your response.

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• which delimeter to use while spliting String

  - by London

  I need to split this line string in each line, I need to get the third word(film name) but as you see the delimeter is one big blank character in some cases its small like before the numbers at the end or its big as in front of numbers at front. I tried using string split with(" ") regex, and also \t but get the out of the bounds error. 400115305 Lionel_Atwill The_Song_of_Songs_(1933_film) 7587 400115309 Brian_Aherne A_Night_to_Remember_(1943_film) 7952 Did anyone have the same problem?

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• Show default value for editing on Python input possible?

  - by kircheis

  Is it possible for python to accept input like this: Folder name: Download But instead of the user typing Download it is already there as a initial value. If the user wants to edit it as Downloads all he has to do is add a 's' and press enter. Using normal input command: folder=input('Folder name: ') all I can get is a blank prompt: Folder name: Is there a simple way to do this that I'm missing?

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• Pattern match and replace in Javascript

  - by T_t

  There is something in my mind: In a web page,there are lots of things we can see from our browser.One of them is text. Now i have some patterns,"abc","hello",or some other strings.In the text, i want to find all the patterns and change the color or background-color of them. Like this: text: what a wonderful day! pattern: "a","day" resulet: what a wonderful day! How can solve this whit Javascript?

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• Is flash's geturl(...) spiderable by google?

  - by tom

  If I made a homepage with an embedded .swf which had buttons that linked to other html pages on my website using the getUrl() function, would those links be spiderable by google? Or should I also put in text links outside of the .swf (which would ruin the design a bit)? I know a lot of people will argue I shouldn't have flash as the main content on the homepage (and their comments are appreciated), but bear in mind, that's not my question.

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• How to differ between Windows Mobile 6.5.3 and previous versions during runtime?

  - by Johann Gerell

  Is there an established or unofficial way of finding out if my application is running on a Windows Mobile 6.5.3 device or if it's a previous version? Managed or native doesn't matter and I don't mind interop-ing.

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• how to run a query from the VBA Editor window in ACCESS?

  - by every_answer_gets_a_point

  i would like to do something like this: DoCmd.OpenQuery "select * from some_table;" how would i do this? please keep in mind i don't want create a new query, save it, and run it, i just want to type the select statement in the vba code and run it.

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• error in writing data into file in python .

  - by mekasperasky

  a='aa' >>> f=open("key.txt","w") >>> s=str(a) >>> f.write(s) and still the key.txt file remains blank .. why?

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• Would Python make a good substitute for the Windows command-line/batch scripts?

  - by Lawrence Johnston

  I've got some experience with Bash, which I don't mind, but now that I'm doing a lot of Windows development I'm needing to do basic stuff/write basic scripts using the Windows command-line language. For some reason said language really irritates me, so I was considering learning Python and using that instead. Is Python suitable for such things? Moving files around, creating scripts to do things like unzipping a backup and restoring a SQL database, etc.

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• Dynamically Populate Listbox - Exclude Empty cells

  - by Daniel

  I am creating a form in excel (not a userform) and I am populating the listbox using cells. However, these cells are sometimes A1:10 and sometimes they are A1:A4. Is there a way to dynamically change what is shown in the listbox? Right now, when I use A1:10 and there are only 4 cells populated, I get the list of 4 populated cells followed by 6 blank entries. I'd like to get rid of the 6 blanks when there are only 4.

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• PHP: header("Location ... suddenly stopped to work.

  - by Patrick

  hi, I modified a very simple php page on my server: <?php header("Location:http://www.google.com"); ?> and it stopped to work. I get as result a blank page (Without source in it). I modified back to the previous url.. and it still doesn't work. What's going on ? Thanks

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• change all the label icon in a panel

  - by Josh

  I have a panel with several JLabel, I would like to change all their Icon, String path = System.getProperty("user.dir"); for (int x=0;x< 21;x++) { javax.swing.JLabel lab = boardPanel.getComponent(x).; lab.setIcon(new ImageIcon(path + "\\image\\blank.jpg")); } it gives me an error of incompatible type, all inside the boardPanel are JLabel, im using netbeans 6.8.

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• How can I style normal html tables (or ASP tables) like the rest of the RadGrid in my website?

  - by Marcel

  I'd like to have a normal table to look like RadGrids, is there an easy way I can use the RadGrid styles (keeping theming in mind)?

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• Creating Java Dialogs

  - by mike_hornbeck

  What would be the easiest way for creating a dialog: - in one window I'm giving data for envelope addressing, also set font type from list of sizes - when clicked OK, in the same window or in next window I get preview of how the envelope would look like with the given names, and used selected font size It should look similarly to this : Should I use Jdialog ? Or will JOptionPane will be enough ? The next step will be to choose color of font and background so I must keep that in mind.

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• Feature panel hover changer effect

  - by user1519157

  Haven't seen this before so hopefully someone has a easy solve, I have a 3 feature panel divs side by side, what I want happen is the 1st panel has a "hover" class added so I can change the background etc and then on a timed interval the hover class jumps to the next panel then the next panel then back to the start on a loop. Also on a side note can you keep the code in mind to be able to add more then 3 feature divs so you could have for example 6 or more or less etc.

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• Creating app data on first use

  - by rity

  I once read somewhere that apps should not copy data while doing an installation but rather all data creation must be done the first time the app is used. Q1: Does this apply to Windows Mobile apps also? Q2: Is it not okay then to copy a blank database to the \appdata\product\ folder and populate it when the user uses the app or must I wait for the user to se the app to even create the database. Win Mobile C# .NET

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• Difference between string comparrison in java

  - by Gandalf StormCrow

  Is there a difference between these ? if(myString.equals("")){ } if(myString.equals(null)){ } if(myString == ""){ } I have a string, I don't know is it empty or has some emtpy spaces I just wan't to stop it to be written in database if it is invalid(if empty or with some blank spaces).

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• Removing &NBSP; in Rails

  - by Trip

  I am trying to remove all &nbsp;'s in my model with the following method : def about_us_sans_spaces self.about_us = replace(self.about_us, "&nbsp;", " ") end Except! it turns out 'replace' isn't a method in rails. How would you remove the  s? Mind you, I have already tried sanitized, simple_format. My view looks like this right now: = truncate(sanitize(simple_format(organization.about_us_sans_spaces), :tags => ''), 125).titleize

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