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  • Efficiency of purely functional programming

    - by Sid
    Does anyone know what is the worst possible asymptotic slowdown that can happen when programming purely functionally as opposed to imperatively (i.e. allowing side-effects)? Clarification from comment by itowlson: is there any problem for which the best known non-destructive algorithm is asymptotically worse than the best known destructive algorithm, and if so by how much?

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  • Path to WordPress Template Directory inside jQuery?

    - by Norbert
    My header is calling a javascript file which sends out an email: <script type="text/javascript" src="<?php bloginfo('template_directory') ?>/css/effects.js"></script> But inside this file, I have a jQuery code that calls a .php file that does the actual sending of the email: $.ajax({ type: "POST", url: "css/sendmail.php", data: dataString` But the script doesn't work, unless the url is: <?php bloginfo('template_directory') ?>/css/sendmail.php and not just: css/sendmail.php Is there any way to include a path to the wordpress template directory inside js?

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  • Flatten XML using XSLT but based on nesting level

    - by user2532750
    I'm new to XSLT and I'm trying to write some XSLT that will flatten any given XML such that a new line occurs whenever the nesting level changes. My input can be any XML document, with any number of nested levels so the structure isn't known to the XSLT. Due to the tools available to me, my solution has to use XSLT version 1.0. For example. <?xml version="1.0"?> <ROWSET> <ROW> <CUSTOMER_ID>0</CUSTOMER_ID> <NAME>Default Company</NAME> <BONUSES> <BONUSES_ROW> <BONUS_ID>21</BONUS_ID> <DESCRIPTION>Performance Bonus</DESCRIPTION> </BONUSES_ROW> <BONUSES_ROW> <BONUS_ID>26</BONUS_ID> <DESCRIPTION>Special Bonus</DESCRIPTION> </BONUSES_ROW> </BONUSES> </ROW> <ROW> <CUSTOMER_ID>1</CUSTOMER_ID> <NAME>Dealer 1</NAME> <BONUSES> <BONUSES_ROW> <BONUS_ID>27</BONUS_ID> <DESCRIPTION>June Bonus</DESCRIPTION> <BONUS_VALUES> <BONUS_VALUES_ROW> <VALUE>10</VALUE> <PERCENT>N</PERCENT> </BONUS_VALUES_ROW> <BONUS_VALUES_ROW> <VALUE>11</VALUE> <PERCENT>Y</PERCENT> </BONUS_VALUES_ROW> </BONUS_VALUES> </BONUSES_ROW> </BONUSES> </ROW> <ROWSET> needs to becomes.... 0, Default Company 21, Performance Bonus 26, Special Bonus 1, Dealer 1 27, June Bonus 10, N 11, Y The XSLT I've written so far is... <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="text" encoding="iso-8859-1"/> <xsl:strip-space elements="*" /> <xsl:template match="/*/child::*"> <xsl:apply-templates select="*"/> </xsl:template> <xsl:template match="*"> <xsl:value-of select="text()" /> <xsl:if test="position()!= last()"><xsl:text>,</xsl:text></xsl:if> <xsl:if test="position()= last()"><xsl:text>&#xD;</xsl:text></xsl:if> <xsl:apply-templates select="./child::*"/> </xsl:template> </xsl:stylesheet> but my output just isn't correct, with gaps and unnecessary data. 0,Default Company, ,21,Performance Bonus 26,Special Bonus 1,Dealer 1, 27,June Bonus, ,10,N 11,Y It seems there needs to be a check as whether or not a node can contain text, but I'm stuck and could do with an XSLT expert's help.

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  • Playing Multiple Sounds at Once in Qt

    - by Ben
    I'm trying to play background music along with sound effects using Qt. However, I can't get more than one sound to play at once. For example: QSound::play("Music.wav"); QSound::play("Effect.wav"); When this code is run (on Windows), you can hear Music.wav just start to play, but then it stops and Effect.wav plays. Is there any way to get the two sounds to play at once?

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  • Any tricks to stop flickering in between page transitions?

    - by SLC
    Specifically, I am using a .hta to display pages. As the content is local, pages load instantly, but there is flicker as they redraw. Are there any tricks you can use to stop it flickering or reduce the effect? I heard somewhere that page transition effects can help, but does anyone have any ideas? Keep in mind that as its a .hta file, I have more flexibility, and can run vbscript etc. and do fancy things.

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  • GTK:Button onHover effect different on Linux and Windows

    - by nubela
    Hi, I have a GTK button on my GUI app, however, the hover effects are different for both Linux and Windows: Heres Linux: (http://imgur.com/DKAy6)[http://imgur.com/DKAy6] Heres Windows: (http://imgur.com/v0FFU)[http://imgur.com/v0FFU] I did not do anything fancy to the animations, in fact, the animation is default, how can I make it uniform? Thank you.

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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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  • recognizing text effect on an image for photoshop

    - by Shishant
    Hello, I had my site designed through an designer, I have this image from it, I want to use same kind of image for other navigation menus which I want to add now, my designer is not supplying me with psd`s of it. How can I know what text effects and fonts I should use in photoshop to achieve the same kind of result? Thank You.

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  • Flash like animation editing and container format for OpenGL environment?

    - by tbarbe
    Are there ANY tools that lets an animator / designer create scripted animations that can export to an OpenGL compatible format -- that are similar to the timeline editing in Flash or After Effects? Does OpenGL ES have some kind of animation playback or container format? ( is there something similar to .swf for OpenGL? ) Im looking for something that lets a designer / animator do his work with a timeline and in a traditional animation environment... meanwhile still having integration with OpenGL.

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  • Make a compiled binary run at native speed flawlessly without recompiling from source on a another system?

    - by unknownthreat
    I know that many people, at a first glance of the question, may immediately yell out "Java", but no, I know Java's qualities. Allow me to elaborate my question first. Normally, when we want our program to run at a native speed on a system, whether it be Windows, Mac OS X, or Linux, we need to compile from source codes. If you want to run a program of another system in your system, you need to use a virtual machine or an emulator. While these tools allow you to use the program you need on the non-native OS, they sometimes have problems of performance and glitches. We also have a newer compiler called "JIT Compiler", where the compiler will parse the bytecode program to native machine language before execution. The performance may increase to a very good extent with JIT Compiler, but the performance is still not the same as running it on a native system. Another program on Linux, WINE, is also a good tool for running Windows program on Linux system. I have tried running Team Fortress 2 on it, and tried experiment with some settings. I got ~40 fps on Windows at its mid-high setting on 1280 x 1024. On Linux, I need to turn everything low at 1280 x 1024 to get ~40 fps. There are 2 notable things though: Polygon model settings do not seem to affect framerate whether I set it low or high. When there are post-processing effects or some special effects that require manipulation of drawn pixels of the current frame, the framerate will drop to 10-20 fps. From this point, I can see that normal polygon rendering is just fine, but when it comes to newer rendering methods that requires graphic card to the job, it slows down to a crawl. Anyway, this question is rather theoretical. Is there anything we can do at all? I see that WINE can run STEAM and Team Fortress 2. Although there are flaws, they can run at lower setting. Or perhaps, I should also ask, "is it possible to translate one whole program on a system to another system without recompiling from source and get native speed?" I see that we also have AOT Compiler, is it possible to use it for something like this? Or there are so many constraints (such as DirectX call or differences in software architecture) that make it impossible to have a flawless and not native to the system program that runs at native speed?

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  • Enabling and Disabling DCA

    - by Rayne
    Hi all, I'm using Linux Kernel version 2.6.33 on a server with Intel Xeon X5570. I assume that Intel's DCA is already enabled on my system, because I see # dmesg | grep dca dca service started, version 1.12.1 Am I right? I would like to test the effects of with and without DCA. How can I disable DCA? Thank you. Regards, Rayne

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  • finding "distance" between two pixel's colors.

    - by igor
    Once more something relatively simple, but confused as to what they want. the method to find distance on cartesian coordinate system is distance=sqrt[(x2-x1)^2 + (y2-y1)^2] but how do i apply it here? //Requires: testColor to be a valid Color //Effects: returns the "distance" between the current Pixel's color and // the passed color // uses the standard method to calculate "distance" // uses the same formula as finding distance on a // Cartesian coordinate system double colorDistance(Color testColor) const;

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  • Image library for mobile application

    - by Suriyan Suresh
    I need a C/C++ image library for mobile image application, The library should have Brightness/contrast Levels Effects - Grayscale, Sepia and so on I particularly want to use it on Samsung BADA Platform. I want the the one event hough if it is not optimized for BADA, i will do the rest.

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  • mixing OpenGL and Interface Builder/ UI Controls - bad idea? Why? (iPhone)

    - by Adam
    I've heard that OpenGL ES and standard iPhone UI controls don't play well together, but I'm wondering if anyone knows why, and what the effects are? I'm writing an OpenGL based game, and the view is loaded from a nib file with ui controls, and it seems to work ok, but the game is really simple at this point... does using ui controls cause some kind of performance hit?

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  • Marquee horizontal text scroll with a fading effect?

    - by Peter
    I am looking for a solution for a single line Marquee horizontal text scroll with a fading effect using javascript (jquery if possible). Like a carousel text scroll. All the google searches gave me scrolling effects but with no fading effect. I know that this can be done in flash but im avoiding it if there are other solutions. Any help would be greatly appreciated.

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  • jquery return false in form

    - by pradeep
    [CODE] function confirmSubmit() { jConfirm('Is the Appointment Confirmed?', 'Confirmation Dialog', function(r) { if(r){return true;} else {return false;} }); } [/CODE] whjen i submit the foem i call this function and use jConfirm from jquery. i print r .its printing properly like true and false.but return false or return true has no effects.it just shows ths pop up and submits the form,does not wait for confirmation. how to solve this?

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  • Focus on textbox based on URL.

    - by Cameron
    I have two forms on one page and want to have the input boxes focused based on the URL. So for example: domain.com/Default.aspx#login and domain.com/Default.aspx#register and the javascript I have this: window.document.getElementById('<%=txtUserName.ClientID %>').focus(); window.document.getElementById('<%=txtEmail.ClientID %>').focus(); it might be better if the urls are Default.aspx?action=login actually (not sure if this effects the way in which it would work)

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  • Google image Swirl - interactive information visualization

    - by skyde
    I have seen this image swirl effect on a visual thesaurus. Is there any open source code for this? Or research paper explaining how they made it. I don't care about the algorithm to match similar objects. I only am wondering about the effects. From what i understand they are called recursive orbital diagram. Screenshot: google Wonder Wheel google image swirl

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  • CSS3 new features...whats the point?

    - by benhowdle89
    I've been reading a lot of ways recently of how to avoid having to use Photoshop for things like gradients and shadows on buttons, when you can use CSS3 Box Shadow for such features. Now this is great, but obviously legacy browsers and most IE browsers don't yet implement CSS3 features, so my question is, why save yourself extra work in Photoshop when you can use CSS3 but then HAVE to use Photoshop for other browsers to see the desired effects? Isn't that just extra work?

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  • Is it possible to use Boehm garbage collector only for the part of the program?

    - by bialix
    I've read article in LinuxJournal about Boehm-Demers-Weiser garbage collector library. I'm interesting to use it in my library instead of my own reference counting implementation. I have only one question: is it possible to use gc only for my shared library and still use malloc/free in the main application? I'm not quite understand how gc checks the heap so I'm worrying about performance of gc in that case and possible side effects.

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