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  • [C#] foreach loop corrent index

    - by Eyla
    Is there anyway to know the current run of a foreach without have to: Int32 i; foreach i++; or is that the best option i got?? Also, how can i know the maximum number of items on that loop?? What i am trying to do is update a progressbar during a foreach loop on my form Thanks This is what i got foreach (FileInfo file in DirectoryFiles) { if ((file.Attributes & FileAttributes.Hidden) == FileAttributes.Hidden || (file.Attributes & FileAttributes.System) == FileAttributes.System) continue; backgroundWorkerLoadDir.ReportProgress(i, file.Name); System.Threading.Thread.Sleep(10); }

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  • Invalid argument for foreach()

    - by johnny-kessel
    Error I'm receiving Invalid argument supplied for foreach() The offending portions is this: foreach($subs[$id] as $id2 => $data2) Strange cause I'm using the same construct elsewhere and it works fine.. I'm using it to generate sub-categories and it works but I want to get rid of the error This is more context foreach($parents as $id => $data) { if($x == 0) { $html .= "<tr width='25%' class='row2'>"; } $shtml = ""; $i = 0; ***foreach($subs[$id] as $id2 => $data2)*** { $i++; if($i == 15) { $shtml .= $this->ipsclass->compiled_templates[ 'skin_businesses' ]->portal_categories_sub_row( $id2, $data2['cat_name'], 1 ) . ""; break; } else $shtml .= $this->ipsclass->compiled_templates[ 'skin_businesses' ]->portal_categories_sub_row( $id2, $data2['cat_name'], 0 ) . ""; }

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  • php if clause inside foreach not retrieving data correctly

    - by Mike
    Here's my issue: In my controller, I want to grab user input from a form. I then parse the input, and compare it to database values to ensure I'm grabbing the correct input. I simply want to match the user's answers to the question, grab the user ID, the question ID, and then determine if the answer applies to a multiple choice or checkbox question, or something else. I take those values and insert them into the answer table. Ignore the waiver stuff. I'll test that once I get the answers input correctly. // add answers and waiver consent records try { $answerArray = array(); $waiverArray = array(); // retrieve answers, waiver consents, and the question ID's from form object foreach ($formData as $key => $value) { $parts = explode("_", $key); if ($parts[0] == 'question') { array_push($answerArray, $value); } if ($parts[0] == 'waiverTitle') { array_push($waiverArray, $value); } } $questions = new Model_DbTable_Questions(); $questionResults = $questions->getQuestionResults($session->idEvent); foreach ( $questionResults as $qr ) { if ($qr ['questionType'] == 'multipleChoice' || $qr ['questionType'] == 'checkBox') { foreach ( $answerArray as $aa ) { $answerData = $answers->addAnswer ( $lastUserID, $qr ['idQuestion'], null, $aa ); echo count ( $answerData ) . ', ' . $qr ['questionType'] . ', ' . $aa . '<br />'; } } else { foreach ( $answerArray as $aa ) { $answerData = $answers->addAnswer ( $lastUserID, $qr ['idQuestion'], $aa, null ); echo count ( $answerData ) . ', ' . $qr ['questionType'] . ', ' . $aa . '<br />'; } } } } catch (Zend_Db_Statement_Exception $e) { $e->getMessage(); throw $e; } From my test data, I expect to get 2 records that match the multiple choice and checkbox criteria, and 1 record for text in the ELSE clause like this: 3, checkbox, 1 3, multipleChoice, 1 3, text, question_2 What I get is a 3x3 Cartesian product, 3 question elements each with the 3 possible answers like this output from the echo statements: 4, checkBox, 1 4, checkBox, 1 4, checkBox, question_2 4, multipleChoice, 1 4, multipleChoice, 1 4, multipleChoice, question_2 4, text, 1 4, text, 1 4, text, question_2 I've tried placing the IF clause inside the inner foreach, but I get the same results. I've been staring at this problem for way too long and cannot see what I'm doing wrong. Your kind assistance would be greatly appreciated. Please let me know if my request requires more clarification.

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  • zend_form display group inside foreach

    - by Mike
    I want to create a display group generated from foreach() clause output. I can't seem to get the syntax correct. Here's the business logic: for each category row find the associated fees output the category description as a label and the fees as radio buttons then create a display group with the fees as the group elements and the category description as the legend. I then have a style sheet format the elements on the page. and here's the code: foreach ($categoryData as $categoryRow) { $fees[$i] = new Zend_Form_Element_Radio("fees[$i]"); $fees[$i]->setDescription(strval($categoryRow['description'])); foreach ($feeData as $feeRow) { if ($feeRow['categories_idCategory'] == $categoryRow['idCategory']){ $fees[$i] ->addMultiOption($feeRow['idFees'] . '-' . $feeRow['categories_idCategory'], $feeRow['amount'] . '-' . $feeRow['name']); } } $fees[$i]->setRequired(TRUE); $this->addElements(array($fees[$i])); $this->addDisplayGroup($feeRow['name'], 'feeGroup',array('legend' => strval($feeRow['description']))); $i++; } I tried placing the addDisplayGroup() code within the foreach(), but I get the error: Message: No valid elements specified for display group So, my guess is that I'm making some kind of novice mistake that you experts will spot right away. I appreciate your time and attention to this matter.

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  • Databases supporting parallel processing across multiple servers

    - by David
    I need a database engine that can utilize multiple servers for processing a single SQL query in parallel. So far I know that this is possible with the some engines, though none of them are feasible for me either because of pricing or missing features. The engines currently known to me are: MS SQL (enterprise) DB2 (enterprise) Oracle (enterprise) GridSQL Greenplum

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  • Parallel File Copy

    - by Jon
    I have a list of files I need to copy on a Linux system - each file ranges from 10 to 100GB in size. I only want to copy to the local filesystem. Is there a way to do this in parallel - with multiple processes each responsible for copying a file - in a simple manner? I can easily write a multithreaded program to do this, but I'm interested in finding out if there's a low level Linux method for doing this.

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  • Dns with parallel resolution

    - by viraptor
    I'm looking for a simple caching (can be caching-only) DNS server, which can do parallel resolving on its own. Is there something like that available? Alternatively I know there's the c-ares library, which can do multiple-hosts resolution, but it's not a drop-in replacement for libresolve that I could use in the affected software. Maybe there is some other lib which can fulfill this requirement?

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  • Is there a canonical book on parallel programming with focus on C++ ?

    - by quant_dev
    I am looking for a good book about parallel programming with focus on C++. Something suitable for a person reasonably good in C++ programming, but with no experience in concurrent software development. On the other hand, I'd prefer a practical book, without loads of silly examples about philosophers eating lunch. Is there a book out there that's the de-facto standard for describing best practices, design methodologies, and other helpful information on parallel programming with focus on C++ ? What about that book makes it special?

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  • USB to LPT adapter?

    - by Dave
    I'm bummed out, pretty much all of our computers here lack parallel ports. I have an EETools ChipMax programming tool that has one of the old-school Centronics connectors on the back. I figured that someone must make a USB to LPT adapter. Sure enough, I found one from iogear, the GUC1284B that is a USB to Parallel Printer cable. Note the boldface on the Printer. It must connect to a printer -- it isn't some generic USB to parallel interface, unfortunately. Does anyone here know of an adapter that works for parallel devices that aren't printers? I'd hate to have to buy a USB version of the ChipMax when I don't need to use it very much.

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  • How to iterate over an array of objects without foreach and ArrayAccess

    - by kenny99
    Hi, I'm having to develop a site on PHP 5.1.6 and I've just come across a bug in my site which isn't happening on 5.2+. When using foreach() to iterate over an object, I get the following error: "Fatal error: Objects used as arrays in post/pre increment/decrement must return values by reference..." Does anyone know how to convert the following foreach loop to a construct which will work with 5.1.6? Thanks in advance! foreach ($post['commercial_brands'] as $brand) { $comm_food = new Commercial_food_Model; $comm_food->brand = $brand; $comm_food->feeding_type_id = $f_type->id; $comm_food->save(); }

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  • Passing in a value to a usercontrol through a foreach loop

    - by LooDaFunk
    in my asp.net mark up I have a foreach loop that iterates through a simple list. In this foreach loop I am adding a new user control and attempting to pass in the value from the loop. However, this value just wont budge and get inside that damn control! Anyone have any suggestions? <%foreach (userInfo i in this.items) { %> <uc1:ItemControl ID="ItemControl" runat="server" UserID='<%#Eval("userID") %>'/> <%} %> userID is a public property in the control, when it goes to set, the value is just literally : <%#Eval("userID") %. I've tried #Bind and =Value but nothing seems to work. Any help would be appreciated!

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  • h:graphicimage not working in c:foreach

    - by Muneeswaran Balasubramanian
    I have used c:forEach loop for display the list of images using h:graphicImage. But I can't display the images. I have the h:commandLink also in my page. The image have to be displayed at the time of form inititalization. But its not working. But after click the h:commandlink, the images are displayed properly. Before that it shows the image not found text (alt message). I have used h:graphicImage tag like below <c:forEach items="#{Sample.imageList}" var="images" varstatus="imageStatus"> <h:graphicimage id="image" url="#{images}" alt="Image Not Found"/> </c:forEach> What I do wrong in that and how can I achieve that?

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  • Two foreach loops, ideea for my code please

    - by webmasters
    Please give me an ideea for my code, its a simple links script. TY I need two foreach loops, one which loops my sites and one which loops my anchors. So i'll have <li>link to site1 and anchor to site1</li> <li>link to site2 and anchor to site2</li> <li>link to site3 and anchor to site3</li> $currentsite = ''.bloginfo('wpurl').''; $mysites = array('http://site1.com', 'http://site2.com', 'http://site3.com'); $myanchors = array('anchor1','anchor2','anchor3'); foreach($mysites as $mysite) ****** i need a foreach loop for the anchors array ******* { if ( $mysite !== $currentsite ){echo '<li><a href="'.$mysite.'" title="'.$myanchor.'">'.$myanchor.'</a></li>';} }

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  • Parallel task in C# 4.0

    - by Jalpesh P. Vadgama
    In today’s computing world the world is all about Parallel processing. You have multicore CPU where you have different core doing different work parallel or its doing same task parallel. For example I am having 4-core CPU as follows. So the code that I write should take care of this.C# does provide that kind of facility to write code for multi core CPU with task parallel library. We will explore that in this post. Read More

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  • Parallel processing slower than sequential?

    - by zebediah49
    EDIT: For anyone who stumbles upon this in the future: Imagemagick uses a MP library. It's faster to use available cores if they're around, but if you have parallel jobs, it's unhelpful. Do one of the following: do your jobs serially (with Imagemagick in parallel mode) set MAGICK_THREAD_LIMIT=1 for your invocation of the imagemagick binary in question. By making Imagemagick use only one thread, it slows down by 20-30% in my test cases, but meant I could run one job per core without issues, for a significant net increase in performance. Original question: While converting some images using ImageMagick, I noticed a somewhat strange effect. Using xargs was significantly slower than a standard for loop. Since xargs limited to a single process should act like a for loop, I tested that, and found it to be about the same. Thus, we have this demonstration. Quad core (AMD Athalon X4, 2.6GHz) Working entirely on a tempfs (16g ram total; no swap) No other major loads Results: /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 1 convert -auto-level real 0m3.784s user 0m2.240s sys 0m0.230s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 2 convert -auto-level real 0m9.097s user 0m28.020s sys 0m0.910s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 10 convert -auto-level real 0m9.844s user 0m33.200s sys 0m1.270s Can anyone think of a reason why running two instances of this program takes more than twice as long in real time, and more than ten times as long in processor time to complete the same task? After that initial hit, more processes do not seem to have as significant of an effect. I thought it might have to do with disk seeking, so I did that test entirely in ram. Could it have something to do with how Convert works, and having more than one copy at once means it cannot use processor cache as efficiently or something? EDIT: When done with 1000x 769KB files, performance is as expected. Interesting. /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 1 convert -auto-level real 3m37.679s user 5m6.980s sys 0m6.340s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 1 convert -auto-level real 3m37.152s user 5m6.140s sys 0m6.530s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 2 convert -auto-level real 2m7.578s user 5m35.410s sys 0m6.050s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 4 convert -auto-level real 1m36.959s user 5m48.900s sys 0m6.350s /media/ramdisk/img$ time for f in *.bmp; do echo $f ${f%bmp}png; done | xargs -n 2 -P 10 convert -auto-level real 1m36.392s user 5m54.840s sys 0m5.650s

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  • Parallel port recording to file on Win XP

    - by Nikola Kotur
    Hi there. I need to write a simple program that records all the input from parallel port into a file. Data flows from industrial machine, setup is fairly simple, but I can't find any good open source examples on parallel port reading for Windows. Do you know a software that does this (and lets me learn how to do it myself), or is there any guideline for parallel port programming on XP? Thanks.

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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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  • Parallel software?

    - by mavric
    What is the meaning of "parallel software" and what are the differences between "parallel software" and "regular software"? What are its advantages and disadvantages? Does writing "parallel software" require a specific hardware or programming language ?

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  • Avaliable parallel technologies in .Net

    - by David
    I am new to .Net platform. I did a search and found that there are several ways to do parallel computing in .Net: Parallel task in Task Parallel Library, which is .Net 3.5. PLINQ, .Net 4.0 Asynchounous Programming, .Net 2.0, (async is mainly used to do I/O heavy tasks, F# has a concise syntax supporting this). I list this because in Mono, there seem to be no TPL or PLINQ. Thus if I need to write cross platform parallel programs, I can use async. .Net threads. No version limitation. Could you give some short comments on these or add more methods in this list? Thanks.

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  • php foreach loop help

    - by sico87
    I am working with a PHP foreach loop and I am needing it to out some specific HTML depening on which array value it is spitting out. Everytime that the foreach loop hits a $content['contentTitle'] i need it to insert a new table and then from there carry on essentially what I am what is for the loop to spit out a new table every a new contentTitle is found, but then add the rest of the data in the array as tr and td's

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  • LINQ/C#: Where & Foreach using index in a list/array

    - by Andrew White
    Hi, I have a list/array and need to process certain elements, but also need the index of the element in the processing. Example: List Names = john, mary, john, bob, simon Names.Where(s = s != "mary").Foreach(MyObject.setInfo(s.index, "blah") But cannot use the "index" property with lists, inversely if the names were in an Array I cannot use Foreach... Any suggestions?

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  • PHP foreach loop through multidimensional array

    - by Muiter
    I have an multidimensional array, how can I use it? I want to use each seperate array in an for loop. I have this code <?php foreach ($calculatie_id[$i] as $value) { echo $value; } ? print_r($calculatie_id); gives Array ( [0] = Array ( [0] = 4 [1] = 6 ) [1] = Array ( [0] = 1 [1] = 5 ) [2] = Array ( [0] = 5 [1] = 6 ) [3] = ) But when using the foreach I only get 46

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  • need to store values from foreach loop into array

    - by Brad
    Need to store values from foreach loop into an array, need help doing that. Code below does not work, only stores the last value, tried $items .= ..., but that is not doing the trick either, any help will be appreciated. <?php foreach($group_membership as $i => $username) { $items = array($username); } print_r($items); ?>

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  • c# string.replace in foreach loop

    - by paradox
    Somehow I can't seem to get string replacement within a foreach loop in C# to work. My code is as follows : foreach (string s in names) { s.Replace("pdf", "txt"); } Am still quite new to LINQ so pardon me if this sounds amateurish ;)

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