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  • Construct a variadic template of unsigned int recursively

    - by Vincent
    I need a tricky thing in a C++ 2011 code. Currently, I have a metafunction of this kind : template<unsigned int N, unsigned int M> static constexpr unsigned int myFunction() This function can generate number based on N and M. I would like to write a metafunction with input N and M, and that will recursively construct a variadic template by decrementing M. For example, by calling this function with M = 3, It will construct a variadic template called List equal to : List... = myFunction<N, 3>, myFunction<N, 2>, myFunction<N, 1>, myFunction<N, 0> How to do that (if it is possible of course) ?

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  • What is fastest way to convert bool to byte?

    - by Amir Rezaei
    What is fastest way to convert bool to byte? I want this mapping: False=0, True=1 Note: I don't want to use any if statement. Update: I don't want to use conditional statement. I don't want the CPU to halt or guess next statement. I want to optimize this code: private static string ByteArrayToHex(byte[] barray) { char[] c = new char[barray.Length * 2]; byte k; for (int i = 0; i < barray.Length; ++i) { k = ((byte)(barray[i] >> 4)); c[i * 2] = (char)(k > 9 ? k + 0x37 : k + 0x30); k = ((byte)(barray[i] & 0xF)); c[i * 2 + 1] = (char)(k > 9 ? k + 0x37 : k + 0x30); } return new string(c); } Update: The length of the array is very large, it's in terabyte order! Therefore I need to do optimization if possible. I shouldn't need to explain my self. The question is still valid. Update: I'm working on a project and looking at others code. That's why I didn't provide with the function at first place. I didn't want to spend time on explaining for people when they have opinion about the code. I shouldn’y need to provide in my question the background of my work, and a function that is not written by me. I have started to optimize it part by part. If I needed help with the whole function I would asked that in another question. That is why I asked this very simple at the beginning. Unfortunately people couldn’t keep themselves to the question. So please if you want to help answer the question. Update: For dose who want to see the point of this question. This example shows how two if statement are reduced from the code. byte A = k > 9 ; //If it was possible (k>9) == 0 || 1 c[i * 2] = A * (k + 0x30) - (A - 1) * (k + 0x30);

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  • Zend Framework modular app, can't load models for each module, autoloading models?

    - by EricP
    Is there a way to have models for each module? I have 3 modules, one is a "contacts" module. I created a model for it in modules/contacts/models/Codes.php Codes Controller class Contacts_CodesController extends Zend_Controller_Action { public function init() { /* Initialize action controller here */ $this->view->messages = $this->_helper->flashMessenger->getMessages(); } public function indexAction() { $codesTable = new Contacts_Model_Codes(); } Codes Model: class Contacts_Model_Codes extends Zend_Db_Table { protected $_name = 'codes'; } The error I get: Fatal error: Class 'Contacts_Model_Codes' not found in /Applications/MAMP/htdocs/zf_site/application/modules/contacts/controllers/CodesController.php on line 26 thanks

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  • Unix: millionth number in the serie 2 3 4 6 9 13 19 28 42 63 ... ?

    - by HH
    It takes about minute to achieve 3000 in my comp but I need to know the millionth number in the serie. The definition is recursive so I cannot see any shortcuts except to calculate everything before the millionth number. How can you fast calculate millionth number in the serie? Serie Def n_{i+1} = \floor{ 3/2 * n_{i} } and n_{0}=2. Interestingly, only one site list the serie according to Goolge: this one. Too slow Bash code #!/bin/bash function serie { n=$( echo "3/2*$n" | bc -l | tr '\n' ' ' | sed -e 's@\\@@g' -e 's@ @@g' ); # bc gives \ at very large numbers, sed-tr for it n=$( echo $n/1 | bc ) #DUMMY FLOOR func } n=2 nth=1 while [ true ]; #$nth -lt 500 ]; do serie $n # n gets new value in the function throught global value echo $nth $n nth=$( echo $nth + 1 | bc ) #n++ done

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  • Problem re-factoring multiple timer countdown

    - by Joko Wandiro
    I create my multiple timer countdown from easy or simple script. entire code The problem's happen when i want to add timer countdown again i have to declare variable current_total_second CODE: elapsed_seconds= tampilkan("#time1"); and variable timer who set with setInterval.. timer= setInterval(function() { if (elapsed_seconds != 0){ elapsed_seconds = elapsed_seconds - 1; $('#time1').text(get_elapsed_time_string(elapsed_seconds)) }else{ $('#time1').parent().slideUp('slow', function(){ $(this).find('.post').text("Post has been deleted"); }) $('#time1').parent().slideDown('slow'); clearInterval(timer); } }, 1000); i've already know about re-factoring and try different way but i'm stack to re-factoring this code i want implement flexibelity to it.. when i add more of timer countdown.. script do it automatically or dynamically without i have to add a bunch of code.. and the code become clear and more efficient. Thanks in Advance

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  • array won't work actionscript 3

    - by steve
    I've tried everything. Arrays are quite simple so I don't know why this doesn't function: var menuList:Array = [menu_bag_mc,menu_chips_mc,menu_coke_mc,menu_cup_mc,menu_deodorant_mc,menu_fork_mc,menu_knife_mc,menu_lighter_mc,menu_milk_mc,menu_pill_mc,menu_rings_mc,menu_shampoo_mc,menu_spoon_mc,menu_straw_mc,menu_toothbrush_mc,menu_trashbag_mc,menu_water_mc]; function captureAllClicks(event:MouseEvent):void { trace(menuList.indexOf(event.target)); } stage.addEventListener(MouseEvent.CLICK, captureAllClicks); Every time I click on any of the items on the stage (which are all given the instance names listed above. each is a tweening movieclip containing a button) I get a trace of -1. WHY?!

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  • How do I use compiler intrinsic __fmul_?

    - by Eric Thoma
    I am writing a massively parallel GPU application. I have been optimizing it by hand. I received a 20% performance increase with _fdividef(x, y), and according to The Cuda C Programming Guide (section C.2.1), using similar functions for multiplication and adding is also beneficial. The function is stated as this: "_fmulrn,rz,ru,rd". __fdividef(x,y) was not stated with the arguments in brackets. I was wondering, what are those brackets? If I run the simple code: int t = __fmul_(5,4); I a compiler error about how _fmul is undefined. I have the CUDA runtime included, so I don't think it is a setup thing; rather it is something to do with those square brackets. How do I correctly use this function? Thank you.

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  • Refreshing metadata on user functions t-SQL

    - by luckyluke
    I am doing some T-SQL programming and I have some Views defines on my database. The data model is still changing these days and I have some table functions defined. Sometimes i deliberately use select * from MYVIEW in such a table function to return all columns. If the view changes (or table) the function crashes and I need to recompile it. I know it is in general good thing so that it prevents from hell lotta errors but still... Is there a way to write such functions so the dont' blow up in my face everytime I change something on the underlying table? Or maybe I am doing something completely wrong... Thanks for help

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  • PHP combobox can't save the selected value on Edit Page

    - by bEtTy Barnes
    hello I've got problem with my combobox. It's not saving the selected value in Edit page. Here what I'm working with: private function inputCAR(){ $html = ""; $selectedId = $this->CAR; //$html .= '<option value="Roadmap Accelerator - Core">Roadmap Accelerator - Core</option>'; //$html .= '<option value="Roadmap Accelerator - Optional Core">Roadmap Accelerator - Optional Core</option>'; //$html .= '<option value="Regulatory">Regulatory</option>'; //$html .= '<option value="Mission Critical">Mission Critical</option>'; //$html .= '<option value="Various CARs/Types">Various CARs/types</option>'; $selection = array( "Roadmap Accelerator - Core", "Roadmap Accelerator - Optional Core", "Regulatory", "Mission Critical", "Various CARs/types" ); $html .= '<label for="car">CAR Type</label>'; $html .= HTML::selectStart("car"); foreach($selection as $value){ $text = $value; $html .= HTML::option($value, $text, $selectedId == $value ? true : false); } $html .= HTML::selectEnd(); return $html; } My option function: public static function option($value, $text, $isSelected=false) { $html = '<option value="' . $value . '"'; if($isSelected) { $html .= ' selected="selected"'; } $html .= '>'; $html .= $text; $html .= '</option>'; return $html; } When I first created a record. The selected value from my combobox got saved into the DB then the page refreshed to display. When I went to edit page, to select another value, and clicked save button. On the display page, it's not saving. For example. on Create page I selected Regulatory. then I changed my mind and changed it to Mission Critical on Edit page. On display page it is not changed. I don't know what's wrong or what I'm missing here. Any help is welcome and truly appreciated. Thanks.

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  • Inline assembler get address of pointer Visual Studio

    - by Joe
    I have a function in VS where I pass a pointer to the function. I then want to store the pointer in a register to further manipulate. How do you do that? I have tried void f(*p) { __asm mov eax, p // try one FAIL __asm mov eax, [p] // try two FAIL __asm mov eax, &p // try three FAIL } Both 1 and 2 are converted to the same code and load the value pointed to. I just want the address. Oddly, option 1 works just fine with integers. void f() { int i = 5; __asm mov eax, i // SUCCESS? }

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  • c++ warning: address of local variable

    - by chnet
    int * ref () { int tmp = 100; return &tmp; } int main () { int * a = ref(); cout << *a << endl; } I know the function ref () is allocated stack space. It will get destroyed as soon as the function exits. So the complier will give warning information. But my question is why the returning result is still correct.

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  • please help me to find out where i am doing mistake in this code? i wnat retieve the value that i am

    - by user309381
    function reload(form) { var val = $('seltab').getValue(); new Ajax.Request('Website.php?cat=' +escape(val), { method:'get', onSuccess: function(transport){ var response = transport.responseText ; $("MyDivDB").innerHTML = transport.responseText ; alert("Success! \n\n" + response); }, onFailure: function(){ alert('Something went wrong...') } }); } </script> </head> title author pages $con = mysql_connect($dbhostname,$dbuserid,$dbpassword); if(!$con) { die ("connection failed".mysql_error()); } $db = mysql_select_db($dbname,$con); if(!$db) { die("Database is not selected".mysql_error()); } $query ="SELECT * FROM books NATURAL JOIN authors" ; $result = mysql_query($query); if(!$query) { die("Database is not query".mysql_error()); } while($row = mysql_fetch_array($result,MYSQL_ASSOC)) { $title = $row["title"]; $author = $row["author"]; $page = $row["pages"]; echo "<tr>"; echo "<td>$title</td>"; echo "<td>$author</td>"; echo "<td>$page</td>"; echo "</tr>"; } print "</table>"; echo "<select id = seltab onchange = 'reload(this.form)'>"; $querysel = "SELECT title_id,author FROM authors NATURAL JOIN books"; $result1 = mysql_query($querysel) ; while($rowID = mysql_fetch_assoc($result1)) { $TitleID = $rowID['title_id']; $author = $rowID['author']; print "<option value = $author>$author\n"; print "</option>"; } print "</select>"; ? Wbsite.php

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  • Firefox, prevent rendering between javascript statements.

    - by Erik
    I'm trying to create some kind of zoom around the mouse cursor feature on my website which ultimately runs these two lines (+ the same for height/scrollTop). canvas.style.width = someValue; canvas.parentNode.scrollLeft = someOtherValue; The problem is that in firefox(3.6) the page is re-rendered directly after the first row has been executed and since the view is depending on both values this means that every time i recalculate the view firefox will will render an invalid view before the correct one, in other words creating flicker. I've tried swapping the two rows but get the same problem. In chrome, opera and IE this doesn't happen. Both lines are executed before any rendering is done. Is there any way to lock the rendering manually, maybe something like this? document.disableRendering(); //fantasy function canvas.style.width = someValue; canvas.parentNode.scrollLeft = someOtherValue; document.enableRendering(); //fantasy function

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  • Get jQuery Error if PHP Breaks

    - by Norbert
    I have a PHP script that breaks if a variable is not populated and it isn't added to the database, but jQuery handles this as a success and I get this error: TypeError: Result of expression 'data' [null] is not an object. Here's the jQuery script: $.ajax({ type: "POST", url: "/clase/do-add", data: $("#adauga").serialize(), dataType: "json", error: function (xhr, textStatus, errorThrown) { alert('Try again.'); }, success: function(data) { var dlHTML = '<dl id="' + data.id + '"> [too long] </dl>'; $('form#adauga').after(dlHTML); $('#main dl:first').hide().fadeIn(); adaugaClasaSubmit.removeAttr('disabled'); adaugaClasa.removeAttr('readonly'); adaugaClasa.val("").focus(); } });

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  • Slider with keypress control bugs when keys pressed to quickly.

    - by Jaybuz
    Hello, I've made a slider that uses the left and right arrow keys to move the slide but when pressed to quickly it will bug a little and I was wondering if it's possible to limit the amount of presses in say a second. You can see it here: {link} $('#slider-nav div').click(function() { $('#slider-nav div').removeClass('selected').addClass(''); $('#slider-nav div:eq('+($.jcarousel.intval($(this).text())-1)+')').addClass('selected'); }) // Allow left and right keys to control slider $(document.documentElement).keypress(function(e) { var code = (e.keyCode ? e.keyCode : e.which); var direction = null; // handle cursor keys if (code == 37) { // left key direction = 'prev'; } else if (code == 39) { // right key direction = 'next'; } if (direction != null) { $('#slider-nav div.selected')[direction]().click(); } });

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  • what is the return value of BeautifulSoup.find ?

    - by prosseek
    I run to get some value as score. score = soup.find('div', attrs={'class' : 'summarycount'}) I run 'print score' to get as follows. <div class=\"summarycount\">524</div> I need to extract the number part. I used re module but failed. m = re.search("[^\d]+(\d+)", score) TypeError: expected string or buffer function search in re.py at line 142 return _compile(pattern, flags).search(string) What's the return type of the find function? How to get the number from the score variable? Is there any easy way to let BeautifulSoup to return the value(in this case 524) itself?

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  • XQuery fn:replace not behaving as expected

    - by CoolGravatar
    I have an Excel worksheet in XML format which contains <Cell ss:StyleID="s127"><Data ss:Type="String">A01-Replace</Data></Cell> I want to replace @A01-Replace with a different string. I'm using the XQuery's replace function like so: let $excel := doc("excel.xml") let $test := "another string" return replace($excel, "(A[0-9]+-Replace)", $test) Before calling replace, the variable $excel is valid XML upon output. However, when I output $excel after I call the replace function, all of the XML tags have been stripped, and $excel is a string with the content of the cells as its values. I would like to keep the XML tags there. Any ideas?

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  • Global javascript variable inside ready

    - by w0rldart
    Which is the right way of declaring a global javascript variable? The way I'm trying it, doesn't work $(document).ready(function() { var intro; if ($('.intro_check').is(':checked')) { intro = true; $('.intro').wrap('<div class="disabled"></div>'); }; $('.intro_check').change(function(){ if(this.checked) { intro = false; $('.enabled').removeClass('enabled').addClass('disabled'); } else { intro = true; if($('.intro').exists()) { $('.disabled').removeClass('disabled').addClass('enabled'); } else { $('.intro').wrap('<div class="disabled"></div>'); } } }); }); console.log(intro);

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  • flash cs4 file reference. Event.COMPLETE not called on a MAC,

    - by jobbie jones
    Hi, I am working with a fileReference, however I'm having issues running on Safari on a MAC... EDIT The below example also doesnt work on Safari on a MAC... http://www.permadi.com/blog/2010/06/flash-as3-using-filereference-to-load-files-example-for-flash-cs4-and-above/ # The workflow on a PC runs as such: 1) Create file reference 2) attach addEventListener's for Event.SELECT and Event.COMPLETE 3) call the browse() method On a PC, Event.SELECT is fired when a file has been selected. Event.COMPLETE is fired when the file data is available to flash. If I select an 500meg file, it takes a few seconds before Event.COMPLETE is fired. If I attempt to access the file data properties (such as reading the data stream) before Event.COMPLETE is fired, I receive null reference errors... So far so good. However, on a MAC (speficially Safari, not tested other browsers), the Event.COMPLETE is not fired. I have checked the Adobe docs, which say Event.COMPLETE is fired when the upload is completed. So why does it get fired on windows when the fileReference has parsed the file, but the upload method has not yet been called... Can anyone help? Here's snippets of the code I am working on: public function browseFile(target:Object):void { var imagesFilter:FileFilter = new FileFilter("Allowed files", "*.jpg;*.bmp;*.flv;"); fileReference.browse([imagesFilter]); fileReference.addEventListener(Event.SELECT, fileSelect); fileReference.addEventListener(Event.COMPLETE, fileSelectComplete); } private function fileSelect(event:Event):void { // update label - IMPORTANT for large files as there's a delay while flash parses file, before control is handed back to this script... setStatusLabel("...loading file"); var fileReference:FileReference = event.target as FileReference; fileReference.addEventListener(Event.COMPLETE, fileSelectComplete); // load the file into the fileReference object fileReference.load(); } // Called when upload file has been processed by flash (a few secs for large files, or fileRef.data is null...) private function fileSelectComplete(event:Event):void { var fileReference:FileReference=event.target as FileReference; trace("ready to do things - but not fired on Safari on a MAC "); }

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  • WordPress + Facebook comments addition (php knowledge needed)

    - by user1356223
    I succeded to fetch Facebok comments number via this function: <?php function fb_comment_count() { global $post; $url = get_permalink($post->ID); $filecontent = file_get_contents('https://graph.facebook.com/?ids=' . $url); $json = json_decode($filecontent); $count = $json->$url->comments; if ($count == 0 || !isset($count)) { $count = 0; } echo $count; } ;?> And I call it with: <?php fb_comment_count();?> Now how do I add it to this code: <?php comments_number(__('No Comments'), __('1 Comment'), __('% Comments'), '', __('Comments Closed') ); ?> so that WordPress shows number of WP and FB comments together in one number. Thank you very much to everyone!

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  • Anything wrong with this code?

    - by Scott B
    Do I actually have to return $postID in each case, in the code below? This is code required for capturing the values of custom fields I've added to the WP post and page editor. Got the idea from here: http://apartmentonesix.com/2009/03/creating-user-friendly-custom-fields-by-modifying-the-post-page/ add_action('save_post', 'custom_add_save'); function custom_add_save($postID){ if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) { return $postID; } else { // called after a post or page is saved if($parent_id = wp_is_post_revision($postID)) { $postID = $parent_id; } if ($_POST['my_customHeader']) { update_custom_meta($postID, $_POST['my_customHeader'], 'my_customHeader'); } else { update_custom_meta($postID, '', 'my_customHeader'); } if ($_POST['my_customTitle']) { update_custom_meta($postID, $_POST['my_customTitle'], 'my_customTitle'); } else { update_custom_meta($postID, '', 'my_customTitle'); } } return $postID; //IS THIS EVEN NECESSARY? } function update_custom_meta($postID, $newvalue, $field_name) { // To create new meta if(!get_post_meta($postID, $field_name)){ add_post_meta($postID, $field_name, $newvalue); }else{ // or to update existing meta update_post_meta($postID, $field_name, $newvalue); } }

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  • newbie problems with codeigniter

    - by Patrick
    hi, i'm trying to learn codeigniter (following a book) but don't understand why the web page comes out empty. my controller is class Welcome extends Controller { function Welcome() { parent::Controller(); } function index() { $data['title'] = "Welcome to Claudia's Kids"; $data['navlist'] = $this->MCats->getCategoriesNav(); $data['mainf'] = $this->MProducts->getMainFeature(); $skip = $data['mainf']['id']; $data['sidef'] = $this->MProducts->getRandomProducts(3, $skip); $data['main'] = "home"; $this->load->vars($data); $this->load->view('template'); } the view is: <--doctype declaration etc etc.. --> </head> <body> <div id="wrapper"> <div id="header"> <?php $this->load->view('header');?> </div> <div id='nav'> <?php $this->load->view('navigation');?> </div> <div id="main"> <?php $this->load->view($main);?> </div> <div id="footer"> <?php $this->load->view('footer');?> </div> </div> </body> </html> Now I know the model is passing back the right variables, but the page appears completely blank. I would expect at least to see an error, or the basic html structure, but the page is just empty. Moreover, the controller doesn't work even if I modify it as follows: function index() { echo "hello."; } What am I doing wrong? Everything was working until I made some changes to the model - but even if I delete all those new changes, the page is still blank.. i'm really confused! thanks, P.

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  • Catch and Show an error from a WCF service call in javascript.

    - by cw
    Hello, I'm calling a WCF service through javascript and right now it's not showing any errors that might occur on the service side to the user. I have the code below and am looking for a better way to inform the user an error has occured, including the call stack and error message if possible. The service itself throws a FaultException if an error has occured. However, I want to catch that error in the javascript call and show it to the user. Here is the js code to call the service function Save() { var saveInfo = $("._saveInfo").val() app.namspace.interfacetoservice.Save( saveInfo, function(results) { if (results == true) { window.close(); } else { alert("error saving"); } } ); } Thanks for the help!

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  • Does the <script> tag position in HTML affects performance of the webpage?

    - by Rahul Joshi
    If the script tag is above or below the body in a HTML page, does it matter for the performance of a website? And what if used in between like this: <body> ..blah..blah.. <script language="JavaScript" src="JS_File_100_KiloBytes"> function f1() { .. some logic reqd. for manipulating contents in a webpage } </script> ... some text here too ... </body> Or is this better?: <script language="JavaScript" src="JS_File_100_KiloBytes"> function f1() { .. some logic reqd. for manipulating contents in a webpage } </script> <body> ..blah..blah.. ..call above functions on some events like onclick,onfocus,etc.. </body> Or this one?: <body> ..blah..blah.. ..call above functions on some events like onclick,onfocus,etc.. <script language="JavaScript" src="JS_File_100_KiloBytes"> function f1() { .. some logic reqd. for manipulating contents in a webpage } </script> </body> Need not tell everything is again in the <html> tag!! How does it affect performance of webpage while loading? Does it really? Which one is the best, either out of these 3 or some other which you know? And one more thing, I googled a bit on this, from which I went here: Best Practices for Speeding Up Your Web Site and it suggests put scripts at the bottom, but traditionally many people put it in <head> tag which is above the <body> tag. I know it's NOT a rule but many prefer it that way. If you don't believe it, just view source of this page! And tell me what's the better style for best performance.

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