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  • How can I change the CSS visibility style for elements that are not on the screen?

    - by RenderIn
    I have a lot of data being placed into a <DIV> with the overflow: auto style. Firefox handles this gracefully but IE becomes very sluggish both when scrolling the div and when executing any Javascript on the page. At first I thought IE just couldn't handle that much data in its DOM, but then I did a simple test where I applied the visibility: hidden style to every element past the first 100. They still take up space and cause the scrollbars to appear. IE no longer had a problem with the data when I did this. So, I'd like to have a "smart" div that hides all the nested div elements which are not currently visible on the screen. Is there a simple solution to this or will I need to have an infinite loop which calculates the location of the scrollbar? If not, is there a particular event that I can hook into where I could do this? Is there a jQuery selector or plugin that will allow me to select all elements not currently visible on the screen?

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  • PDF Form Field Manipulation

    - by 108039818756939362532
    I'm making a web interface to autofill pdf forms with user data from a database. The admin needs to be able to upload a pdf (right now targeted at IRS pdf forms) and then associate the fields in the pdf with data fields in the database. I need a way to help the admin associate the field names (stuff like "topmostSubform[0].Page2[0].p2-t66[0]") with the the data fields in the database. I'm looking for a way to modify the PDF programatically to in some way provide this information. Basically I'm open to suggestions on how I might make the field names appear in an obvious manner on a modified version of the original pdf. The closest I've gotten is being able to insert Tooltips into the fields in the pdf by just editting the raw pdf line by line. However when editting the pdf in this manner the field names are gibberish, and so I can't just use them. An optimal solution would be anything that could automatically parse a pdf and set each field's tooltip to be the fields name. Anything that can be run from the command line, or any python tool, or just a basic how to correctly parse a field's name from a raw pdf file would be amazing.

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  • jQuery ajax not preloading images

    - by George Wiscombe
    I have a list of galleries, when you click on the title of a gallery it pulls in the contents (HTML with images). When the content is pulled in it preloads the html but not the images, any ideas? This is the JavaScript i'm using: $('#ajax-load').ajaxStart(function() { $(this).show(); }).ajaxStop(function() { $(this).hide();}); // PORTFOLIO SECTION // Hide project details on load $('.project > .details').hide(); // Slide details up / down on click $('.ajax > .header').click(function () { if ($(this).siblings(".details").is(":hidden")) { var detailUrl = $(this).find("a").attr("href"); var $details = $(this).siblings(".details"); $.ajax({ url: detailUrl, data: "", type: "GET", success: function(data) { $details.empty(); $details.html(data); $details.find("ul.project-nav").tabs($details.find(".pane"), {effect: 'fade'}); $details.slideDown("slow"); }}); } else {$(this).siblings(".details").slideUp();} return false; }); You can see this demonstrated at http://www.georgewiscombe.com Thanks in advance!

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  • What is the right approach to checksumming UDP packets

    - by mr.b
    I'm building UDP server application in C#. I've come across a packet checksum problem. As you probably know, each packet should carry some simple way of telling receiver if packet data is intact. Now, UDP already has 2-byte checksum as part of header, which is optional, at least in IPv4 world. Alternative method is to have custom checksum as part of data section in each packet, and to verify it on receiver. My question boils down to: is it better to rely on (optional) checksum in UDP packet header, or to make a custom checksum implementation as part of packet data section? Perhaps the right answer depends on circumstances (as usual), so one circumstance here is that, even though code is written and developed in .NET on Windows, it might have to run under platform-independent Mono.NET, so eventual solution should be compatible with other platforms. I believe that custom checksum algorithm would be easily portable, but I'm not so sure about the first one. Any thoughts? Also, shouts about packet checksumming in general are welcome.

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  • inverse relation to multiple inheriting classes in django

    - by Ofri Raviv
    Here are my schematic models: class Law(models.Model): ... class Bill(models.Model): ... # data for a proposed law, or change of an existing law class PrivateBill(Bill): ... # data for a Bill that was initiated by a parliament member class GovernmentBill(Bill): ... # data for a Bill that was initiated by the government It is possible and likely that in the future I (or maybe someone else) would want to add more Bill types. Every Bill should point to a Law (indicating what law this bill is going to change) and my question is: What is the best way to implement this? If I add the ForeignKey(Law) to Bill, I'll have a relation from every Bill to Law, but a Law would only have an inverse relation to Bills (bill_set), and not a different inverse relation to each type of bill. Of course I'll be able to filter each type of bill to get only the ones pointing to a specific Law, but this is something I think I'll need to use often, so I think having privatebill_set, governmentbill_set etc would make the code more readable. Another possible solution is to add the foreign key to each of the inheriting classes (this would give me a privatebill_set, governmentbill_set, futurebill_set), but that seems hairy because I would be relying on future programmers to remember to add that relation. How would you solve this?

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  • WPF ListView GridView DisplayMemberBinding Center alignin content

    - by Bigginn
    I'm trying to center align data in a ListView/Gridview where I use DisplayMemberBinding. This is (partially) how my gridview looks: <ListView> <ListView.View> <GridView> <GridView.Columns> <GridViewColumn DisplayMemberBinding="{Binding Path=Timi}" Width="Auto"> <GridViewColumnHeader Content="Tími" Click="GridViewColumnHeader_Click" ></GridViewColumnHeader> </GridViewColumn> </GridView.Columns> </GridView> </ListView.View> </ListView> I tried to use CellTemplate like explained on this page http://msdn.microsoft.com/en-us/library/system.windows.controls.gridviewcolumn.celltemplate.aspx but it didn't work and then later I read somewhere that one should never use cellTemplate and DisplayMemberBinding together. So the question is : How do I center the gridview data when I use DisplayMemberBinding to bind the data to the gridview? Thanks in advance.

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  • Conflict between two Javascripts (MailChimp validation etc. scripts & jQuery hSlides.js)

    - by Brian
    I have two scripts running on the same page, one is the jQuery.hSlides.js script http://www.jesuscarrera.info/demos/hslides/ and the other is a custom script that is used for MailChimp list signup integration. The hSlides panel can be seen in effect here: http://theatricalbellydance.com. I've turned off the MailChimp script because it was conflicting with the hSlides script, causing it not to to fail completely (as seen here http://theatricalbellydance.com/home2/). Can someone tell me what could be done to the hSlides script to stop the conflict with the MailChimp script? The MailChimp Script var fnames = new Array(); var ftypes = new Array(); fnames[0] = 'EMAIL'; ftypes[0] = 'email'; fnames[3] = 'MMERGE3'; ftypes[3] = 'text'; fnames[1] = 'FNAME'; ftypes[1] = 'text'; fnames[2] = 'LNAME'; ftypes[2] = 'text'; fnames[4] = 'MMERGE4'; ftypes[4] = 'address'; fnames[6] = 'MMERGE6'; ftypes[6] = 'number'; fnames[9] = 'MMERGE9'; ftypes[9] = 'text'; fnames[5] = 'MMERGE5'; ftypes[5] = 'text'; fnames[7] = 'MMERGE7'; ftypes[7] = 'text'; fnames[8] = 'MMERGE8'; ftypes[8] = 'text'; fnames[10] = 'MMERGE10'; ftypes[10] = 'text'; fnames[11] = 'MMERGE11'; ftypes[11] = 'text'; fnames[12] = 'MMERGE12'; ftypes[12] = 'text'; var err_style = ''; try { err_style = mc_custom_error_style; } catch (e) { err_style = 'margin: 1em 0 0 0; padding: 1em 0.5em 0.5em 0.5em; background: rgb(255, 238, 238) none repeat scroll 0% 0%; font-weight: bold; float: left; z-index: 1; width: 80%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; color: rgb(255, 0, 0);'; } var mce_jQuery = jQuery.noConflict(); mce_jQuery(document).ready(function ($) { var options = { errorClass: 'mce_inline_error', errorElement: 'div', errorStyle: err_style, onkeyup: function () {}, onfocusout: function () {}, onblur: function () {} }; var mce_validator = mce_jQuery("#mc-embedded-subscribe-form").validate(options); options = { url: 'http://theatricalbellydance.us1.list-manage.com/subscribe/post-json?u=1d127e7630ced825cb1a8b5a9&id=9f12d2a6bb&c=?', type: 'GET', dataType: 'json', contentType: "application/json; charset=utf-8", beforeSubmit: function () { mce_jQuery('#mce_tmp_error_msg').remove(); mce_jQuery('.datefield', '#mc_embed_signup').each(function () { var txt = 'filled'; var fields = new Array(); var i = 0; mce_jQuery(':text', this).each(function () { fields[i] = this; i++; }); mce_jQuery(':hidden', this).each(function () { if (fields[0].value == 'MM' && fields[1].value == 'DD' && fields[2].value == 'YYYY') { this.value = ''; } else if (fields[0].value == '' && fields[1].value == '' && fields[2].value == '') { this.value = ''; } else { this.value = fields[0].value + '/' + fields[1].value + '/' + fields[2].value; } }); }); return mce_validator.form(); }, success: mce_success_cb }; mce_jQuery('#mc-embedded-subscribe-form').ajaxForm(options); }); function mce_success_cb(resp) { mce_jQuery('#mce-success-response').hide(); mce_jQuery('#mce-error-response').hide(); if (resp.result == "success") { mce_jQuery('#mce-' + resp.result + '-response').show(); mce_jQuery('#mce-' + resp.result + '-response').html(resp.msg); mce_jQuery('#mc-embedded-subscribe-form').each(function () { this.reset(); }); } else { var index = -1; var msg; try { var parts = resp.msg.split(' - ', 2); if (parts[1] == undefined) { msg = resp.msg; } else { i = parseInt(parts[0]); if (i.toString() == parts[0]) { index = parts[0]; msg = parts[1]; } else { index = -1; msg = resp.msg; } } } catch (e) { index = -1; msg = resp.msg; } try { if (index == -1) { mce_jQuery('#mce-' + resp.result + '-response').show(); mce_jQuery('#mce-' + resp.result + '-response').html(msg); } else { err_id = 'mce_tmp_error_msg'; html = '<div id="' + err_id + '" style="' + err_style + '"> ' + msg + '</div>'; var input_id = '#mc_embed_signup'; var f = mce_jQuery(input_id); if (ftypes[index] == 'address') { input_id = '#mce-' + fnames[index] + '-addr1'; f = mce_jQuery(input_id).parent().parent().get(0); } else if (ftypes[index] == 'date') { input_id = '#mce-' + fnames[index] + '-month'; f = mce_jQuery(input_id).parent().parent().get(0); } else { input_id = '#mce-' + fnames[index]; f = mce_jQuery().parent(input_id).get(0); } if (f) { mce_jQuery(f).append(html); mce_jQuery(input_id).focus(); } else { mce_jQuery('#mce-' + resp.result + '-response').show(); mce_jQuery('#mce-' + resp.result + '-response').html(msg); } } } catch (e) { mce_jQuery('#mce-' + resp.result + '-response').show(); mce_jQuery('#mce-' + resp.result + '-response').html(msg); } } } The hslides script: /* * hSlides (1.0) // 2008.02.25 // <http://plugins.jquery.com/project/hslides> * * REQUIRES jQuery 1.2.3+ <http://jquery.com/> * * Copyright (c) 2008 TrafficBroker <http://www.trafficbroker.co.uk> * Licensed under GPL and MIT licenses * * hSlides is an horizontal accordion navigation, sliding the panels around to reveal one of interest. * * Sample Configuration: * // this is the minimum configuration needed * $('#accordion').hSlides({ * totalWidth: 730, * totalHeight: 140, * minPanelWidth: 87, * maxPanelWidth: 425 * }); * * Config Options: * // Required configuration * totalWidth: Total width of the accordion // default: 0 * totalHeight: Total height of the accordion // default: 0 * minPanelWidth: Minimum width of the panel (closed) // default: 0 * maxPanelWidth: Maximum width of the panel (opened) // default: 0 * // Optional configuration * midPanelWidth: Middle width of the panel (centered) // default: 0 * speed: Speed for the animation // default: 500 * easing: Easing effect for the animation. Other than 'swing' or 'linear' must be provided by plugin // default: 'swing' * sensitivity: Sensitivity threshold (must be 1 or higher) // default: 3 * interval: Milliseconds for onMouseOver polling interval // default: 100 * timeout: Milliseconds delay before onMouseOut // default: 300 * eventHandler: Event to open panels: click or hover. For the hover option requires hoverIntent plugin <http://cherne.net/brian/resources/jquery.hoverIntent.html> // default: 'click' * panelSelector: HTML element storing the panels // default: 'li' * activeClass: CSS class for the active panel // default: none * panelPositioning: Accordion panelPositioning: top -> first panel on the bottom and next on the top, other value -> first panel on the top and next to the bottom // default: 'top' * // Callback funtctions. Inside them, we can refer the panel with $(this). * onEnter: Funtion raised when the panel is activated. // default: none * onLeave: Funtion raised when the panel is deactivated. // default: none * * We can override the defaults with: * $.fn.hSlides.defaults.easing = 'easeOutCubic'; * * @param settings An object with configuration options * @author Jesus Carrera <[email protected]> */ (function($) { $.fn.hSlides = function(settings) { // override default configuration settings = $.extend({}, $.fn.hSlides.defaults, settings); // for each accordion return this.each(function(){ var wrapper = this; var panelLeft = 0; var panels = $(settings.panelSelector, wrapper); var panelPositioning = 1; if (settings.panelPositioning != 'top'){ panelLeft = ($(settings.panelSelector, wrapper).length - 1) * settings.minPanelWidth; panels = $(settings.panelSelector, wrapper).reverse(); panelPositioning = -1; } // necessary styles for the wrapper $(this).css('position', 'relative').css('overflow', 'hidden').css('width', settings.totalWidth).css('height', settings.totalHeight); // set the initial position of the panels var zIndex = 0; panels.each(function(){ // necessary styles for the panels $(this).css('position', 'absolute').css('left', panelLeft).css('zIndex', zIndex).css('height', settings.totalHeight).css('width', settings.maxPanelWidth); zIndex ++; // if this panel is the activated by default, set it as active and move the next (to show this one) if ($(this).hasClass(settings.activeClass)){ $.data($(this)[0], 'active', true); if (settings.panelPositioning != 'top'){ panelLeft = ($(settings.panelSelector, wrapper).index(this) + 1) * settings.minPanelWidth - settings.maxPanelWidth; }else{ panelLeft = panelLeft + settings.maxPanelWidth; } }else{ // check if we are centering and some panel is active // this is why we can't add/remove the active class in the callbacks: positioning the panels if we have one active if (settings.midPanelWidth && $(settings.panelSelector, wrapper).hasClass(settings.activeClass) == false){ panelLeft = panelLeft + settings.midPanelWidth * panelPositioning; }else{ panelLeft = panelLeft + settings.minPanelWidth * panelPositioning; } } }); // iterates through the panels setting the active and changing the position var movePanels = function(){ // index of the new active panel var activeIndex = $(settings.panelSelector, wrapper).index(this); // iterate all panels panels.each(function(){ // deactivate if is the active if ( $.data($(this)[0], 'active') == true ){ $.data($(this)[0], 'active', false); $(this).removeClass(settings.activeClass).each(settings.onLeave); } // set position of current panel var currentIndex = $(settings.panelSelector, wrapper).index(this); panelLeft = settings.minPanelWidth * currentIndex; // if the panel is next to the active, we need to add the opened width if ( (currentIndex * panelPositioning) > (activeIndex * panelPositioning)){ panelLeft = panelLeft + (settings.maxPanelWidth - settings.minPanelWidth) * panelPositioning; } // animate $(this).animate({left: panelLeft}, settings.speed, settings.easing); }); // activate the new active panel $.data($(this)[0], 'active', true); $(this).addClass(settings.activeClass).each(settings.onEnter); }; // center the panels if configured var centerPanels = function(){ var panelLeft = 0; if (settings.panelPositioning != 'top'){ panelLeft = ($(settings.panelSelector, wrapper).length - 1) * settings.minPanelWidth; } panels.each(function(){ $(this).removeClass(settings.activeClass).animate({left: panelLeft}, settings.speed, settings.easing); if ($.data($(this)[0], 'active') == true){ $.data($(this)[0], 'active', false); $(this).each(settings.onLeave); } panelLeft = panelLeft + settings.midPanelWidth * panelPositioning ; }); }; // event handling if(settings.eventHandler == 'click'){ $(settings.panelSelector, wrapper).click(movePanels); }else{ var configHoverPanel = { sensitivity: settings.sensitivity, interval: settings.interval, over: movePanels, timeout: settings.timeout, out: function() {} } var configHoverWrapper = { sensitivity: settings.sensitivity, interval: settings.interval, over: function() {}, timeout: settings.timeout, out: centerPanels } $(settings.panelSelector, wrapper).hoverIntent(configHoverPanel); if (settings.midPanelWidth != 0){ $(wrapper).hoverIntent(configHoverWrapper); } } }); }; // invert the order of the jQuery elements $.fn.reverse = function(){ return this.pushStack(this.get().reverse(), arguments); }; // default settings $.fn.hSlides.defaults = { totalWidth: 0, totalHeight: 0, minPanelWidth: 0, maxPanelWidth: 0, midPanelWidth: 0, speed: 500, easing: 'swing', sensitivity: 3, interval: 100, timeout: 300, eventHandler: 'click', panelSelector: 'li', activeClass: false, panelPositioning: 'top', onEnter: function() {}, onLeave: function() {} }; })(jQuery);

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  • Iphone: TabView + TableView

    - by OneTrickPonySoft
    I think I'm missing something simple, but I can't figure out exactly what it is. I'm trying to set up an App with a UITabViewController, and one of the Tabs will have a UITableView and UISearchBar (but no Navigation Controller). I set up the UITabViewController with all the tabs in interface builder, and the views are in their own xib files. The xib file for the tab with the UITableView is set up and connected as follows. Stuff in the browser: File's owner (Class is my custom class that is a child of UITableViewController) view - View View (class UIView, reference view - File's owner) contains: UITableView (if i try and set references to the data source / delegate, the app breaks) UISearchBar (unconfigured at the moment) This setup displays all the items and doesn't lock up, but I can't assign a DataSource without it crashing when i try and load the tab with the UITableView. What should I do to get data into this table, either in IB or code? My ideas are as follows: Implement custom UITableView class, hook up to table view in IB or to custom tableviewcontroller in Xcode. Pound head or laptop against the wall until it works. Update: Here's the error the simulator pushes to the console when I connect the Tableview's data source and delegate to File Owner (who's class is my custom tableviewcontroller). 2/14/09 6:59:12 PM TabBarWillbeRight[33172] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[UIViewController tableView:numberOfRowsInSection:]: unrecognized selector sent to instance 0x523760'

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  • Memory Bandwidth Performance for Modern Machines

    - by porgarmingduod
    I'm designing a real-time system that occasionally has to duplicate a large amount of memory. The memory consists of non-tiny regions, so I expect the copying performance will be fairly close to the maximum bandwidth the relevant components (CPU, RAM, MB) can do. This led me to wonder what kind of raw memory bandwidth modern commodity machine can muster? My aging Core2Duo gives me 1.5 GB/s if I use 1 thread to memcpy() (and understandably less if I memcpy() with both cores simultaneously.) While 1.5 GB is a fair amount of data, the real-time application I'm working on will have have something like 1/50th of a second, which means 30 MB. Basically, almost nothing. And perhaps worst of all, as I add multiple cores, I can process a lot more data without any increased performance for the needed duplication step. But a low-end Core2Due isn't exactly hot stuff these days. Are there any sites with information, such as actual benchmarks, on raw memory bandwidth on current and near-future hardware? Furthermore, for duplicating large amounts of data in memory, are there any shortcuts, or is memcpy() as good as it will get? Given a bunch of cores with nothing to do but duplicate as much memory as possible in a short amount of time, what's the best I can do?

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  • Rijndael managed: plaintext length detction

    - by sheepsimulator
    I am spending some time learning how to use the RijndaelManaged library in .NET, and developed the following function to test encrypting text with slight modifications from the MSDN library: Function encryptBytesToBytes_AES(ByVal plainText As Byte(), ByVal Key() As Byte, ByVal IV() As Byte) As Byte() ' Check arguments. If plainText Is Nothing OrElse plainText.Length <= 0 Then Throw New ArgumentNullException("plainText") End If If Key Is Nothing OrElse Key.Length <= 0 Then Throw New ArgumentNullException("Key") End If If IV Is Nothing OrElse IV.Length <= 0 Then Throw New ArgumentNullException("IV") End If ' Declare the RijndaelManaged object ' used to encrypt the data. Dim aesAlg As RijndaelManaged = Nothing ' Declare the stream used to encrypt to an in memory ' array of bytes. Dim msEncrypt As MemoryStream = Nothing Try ' Create a RijndaelManaged object ' with the specified key and IV. aesAlg = New RijndaelManaged() aesAlg.BlockSize = 128 aesAlg.KeySize = 128 aesAlg.Mode = CipherMode.ECB aesAlg.Padding = PaddingMode.None aesAlg.Key = Key aesAlg.IV = IV ' Create a decrytor to perform the stream transform. Dim encryptor As ICryptoTransform = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV) ' Create the streams used for encryption. msEncrypt = New MemoryStream() Using csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write) Using swEncrypt As New StreamWriter(csEncrypt) 'Write all data to the stream. swEncrypt.Write(plainText) End Using End Using Finally ' Clear the RijndaelManaged object. If Not (aesAlg Is Nothing) Then aesAlg.Clear() End If End Try ' Return the encrypted bytes from the memory stream. Return msEncrypt.ToArray() End Function Here's the actual code I am calling encryptBytesToBytes_AES() with: Private Sub btnEncrypt_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEncrypt.Click Dim bZeroKey As Byte() = {&H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0, &H0} PrintBytesToRTF(encryptBytesToBytes_AES(bZeroKey, bZeroKey, bZeroKey)) End Sub However, I get an exception thrown on swEncrypt.Write(plainText) stating that the 'Length of the data to encrypt is invalid.' However, I know that the size of my key, iv, and plaintext are 16 bytes == 128 bits == aesAlg.BlockSize. Why is it throwing this exception? Is it because the StreamWriter is trying to make a String (ostensibly with some encoding) and it doesn't like &H0 as a value?

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  • Serial.begin(speed, config) not compiling for Leonardo Board

    - by forgemo
    I would like to configure my serial communication to have no parity, 1 start- and 2 stop-bits. The documentation for Serial.begin(speed, config) states: (...) An optional second argument configures the data, parity, and stop bits. The default is 8 data bits, no parity, one stop bit. The documentation also lists the possible configuration-values. According to my (limited) understanding, I need SERIAL_7N2 or SERIAL_8N2 to meet my requirements. (I'm not sure how the data-bits relate to the the 1-start-bit that I need.) However, I can't even compile because I have no idea how to supply that config value to the begin method. (I don't have much Arduino/C++ experience) I've tried in my code the following two variants: Serial.begin(9600, SERIAL_8N2); Serial.begin(9600, "SERIAL_8N2"); Am I missing something? Additional Information: Serial.begin(speed, config) has been introduced with the latest Arduino 1.0.2 IDE version. The code defining/implementing the begin methods can be found here. HardwareSerial.h HardwareSerial.cpp Edit: According to the replies from PeterJ and borges, the following variant is correct. Serial.begin(9600, SERIAL_8N2); However, it's still not working. I found that the compile error doesn't occur if I change the configured board from my Arduino Leonardo to Arduino uno. Therefore, it could be a bug occurring only with a subset of boards ... or maybe it's not supported?!

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  • Delphi 6 OleServer.pas Invoke memory leak

    - by Mike Davis
    There's a bug in delphi 6 which you can find some reference online for when you import a tlb the order of the parameters in an event invocation is reversed. It is reversed once in the imported header and once in TServerEventDIspatch.Invoke. you can find more information about it here: http://cc.embarcadero.com/Item/16496 somewhat related to this issue there appears to be a memory leak in TServerEventDispatch.Invoke with a parameter of a Variant of type Var_Array (maybe others, but this is the more obvious one i could see). The invoke code copies the args into a VarArray to be passed to the event handler and then copies the VarArray back to the args after the call, relevant code pasted below: // Set our array to appropriate length SetLength(VarArray, ParamCount); // Copy over data for I := Low(VarArray) to High(VarArray) do VarArray[I] := OleVariant(TDispParams(Params).rgvarg^[I]); // Invoke Server proxy class if FServer <> nil then FServer.InvokeEvent(DispID, VarArray); // Copy data back for I := Low(VarArray) to High(VarArray) do OleVariant(TDispParams(Params).rgvarg^[I]) := VarArray[I]; // Clean array SetLength(VarArray, 0); There are some obvious work-arounds in my case: if i skip the copying back in case of a VarArray parameter it fixes the leak. to not change the functionality i thought i should copy the data in the array instead of the variant back to the params but that can get complicated since it can hold other variants and seems to me that would need to be done recursively. Since a change in OleServer will have a ripple effect i want to make sure my change here is strictly correct. can anyone shed some light on exactly why memory is being leaked here? I can't seem to look up the callstack any lower than TServerEventDIspatch.Invoke (why is that?) I imagine that in the process of copying the Variant holding the VarArray back to the param list it added a reference to the array thus not allowing it to be release as normal but that's just a rough guess and i can't track down the code to back it up. Maybe someone with a better understanding of all this could shed some light?

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  • How can I know when a Button in a Flex DataGrid itemRenderer is clicked?

    - by Eric Belair
    I have a DataGrid component that displays a few columns of data. It has one additional column that displays a Button that allows the user to take an action with regard to the record. <mx:DataGrid dataProvider="{myData}"> <mx:columns> <mx:DataGridColumn dataField="firstName" headerText="First Name" width="75" /> <mx:DataGridColumn dataField="LastName" headerText=" Last Name" width="150" /> <mx:DataGridColumn dataField="phone" headerText="Phone" width="120" /> <mx:DataGridColumn headerText="" width="110"> <mx:itemRenderer> <mx:Component> <mx:Box horizontalAlign="center" width="100%"> <mx:Button label="Take Action" /> </mx:Box> </mx:Component> </mx:itemRenderer> </mx:DataGridColumn> </mx:columns> </mx:DataGrid> I need to perform an action in the parent component, using other data that is available there, but unrelated to the data in the DataGrid. What is the best way to catch the Button click in the parent component, and know what record it corresponds to? Should I use a Custom Event, or an itemEditor, or something else completely?

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  • Troubleshooting FORM POST problems

    - by brettr
    I'm using the following code to submit to a WCF service. I keep getting an error that the key is invalid. I have a webpage on the same server that I submit the same data (but different key) using a FORM POST. It works fine that way. I put the URL below all in a URL (including valid key from server webpage) and get the key is invalid error. I'm thinking the data I'm submitting through the iPhone isn't really going across as a FORM POST but rather as a URL. Is there anything I may be doing wrong in the following code or any other suggestions? NSString *stringForURL = @"https://abc.com/someservice.aspx"; NSURL *URL=[[NSURL alloc] initWithString:stringForURL]; NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL]; NSString *request_body = [NSString stringWithFormat:@"prop1=value1&key=%@", [@"r2xHEuzgDTQEWA5Xe6+k9BSVrgsMX2mWQBW/39nqT4s=" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]; NSData *postData = [request_body dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES]; NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]]; [request setValue:postLength forHTTPHeaderField:@"Content-Length"]; [request setHTTPMethod:@"POST"]; [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"]; [request setHTTPBody:postData]; NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self]; [NSThread sleepForTimeInterval:1]; self.receivedData = [[NSMutableData data] retain];

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  • Perl : package using problem.

    - by pavun_cool
    Hi All.. Normally when I am writing the perl program . I used to include following package . use strict ; use warnings ; use Data::Dumper ; Now , I want like this, I will not include all this package for every program . for that I will have these all package in my own package. like following. my_packages.pm package my_packages ; { use strict ; use warnings ; use Data::Dumper; } 1; So, that if I add my_packages.pm in perl program , it needs have all above packages . Actually I have done this experimentation . But I am not able get this things . which means when I am using my_packages . I am not able get the functionality of "use strict, use warnings , use Data::Dumper ". Someone help me out of this problem.....

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  • Unrecognized function - but why?

    - by fmz
    I have an Ajax contact form that links to a jquery file but for some reason I get the following error in Firebug: $("#contactform").submit is not a function Here is the link to the jquery file: <script type="text/javascript" src="scripts/jquery.jigowatt.js"></script> Here is the jquery code: jQuery(document).ready(function(){ $('#contactform').submit(function(){ var action = $(this).attr('action'); $("#message").slideUp(750,function() { $('#message').hide(); $('#submit') .after('<img src="assets/ajax-loader.gif" class="loader" />') .attr('disabled','disabled'); $.post(action, { name: $('#name').val(), company: $('#company').val(), email: $('#email').val(), phone: $('#phone').val(), subject: $('#purpose').val(), comments: $('#comments').val(), verify: $('#verify').val() }, function(data){ document.getElementById('message').innerHTML = data; $('#message').slideDown('slow'); $('#contactform img.loader').fadeOut('slow',function() {$(this).remove()}); $('#contactform #submit').attr('disabled',''); if(data.match('success') != null) $('#contactform').slideUp('slow'); } ); }); return false; }); }); And last but not least, here is the page where it is all supposed to come together: http://theideapeople.com.previewdns.com/contact_us.html I would appreciate some help getting the function to function properly. Thanks.

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  • Why doesen't it work to write this NSMutableArray to a plist?

    - by Emil
    edited. Hey, I am trying to write an NSMutableArray to a plist. The compiler does not show any errors, but it does not write to the plist anyway. I have tried this on a real device too, not just the Simulator. Basically, what this code does, is that when you click the accessoryView of a UITableViewCell, it gets the indexPath pressed, edits an NSMutableArray and tries to write that NSMutableArray to a plist. It then reloads the arrays mentioned (from multiple plists) and reloads the data in a UITableView from the arrays. Code: NSIndexPath *indexPath = [table indexPathForRowAtPoint:[[[event touchesForView:sender] anyObject] locationInView:table]]; [arrayFav removeObjectAtIndex:[arrayFav indexOfObject:[NSNumber numberWithInt:[[arraySub objectAtIndex:indexPath.row] intValue]]]]; NSString *rootPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0]; NSString *plistPath = [rootPath stringByAppendingPathComponent:@"arrayFav.plist"]; NSLog(@"%@ - %@", rootPath, plistPath); [arrayFav writeToFile:plistPath atomically:YES]; // Reloads data into the arrays [self loadDataFromPlists]; // Reloads data in tableView from arrays [tableFarts reloadData];

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  • How to prevent Hibernate from nullifying relationship column during entity removal

    - by Grzegorz
    I have two entities, A and B. I need to easily retrieve entities A, joined with entities B on the condition of equal values of some column (some column from A equal to some column in B). Those columns are not primary or foreign keys, they contain same business data. I just need to have access from each instance of A to the collection of B's with the same value of this column. So I model it like this: class A { @OneToMany @JoinColumn(name="column_in_B", referencedColumnName="column_in_A") Collection<B> bs; This way, I can run queries like "select A join fetch a.bs b where b...." (Actually, the real relationship here is many-to-many. But when I use @ManyToMany, Hibernate forces me to use join table, which doesnt exist here. So I have to use @OneToMany as workaround). So far so good. The main problem is: whenever I delete an instance of A, hibernate calls "Update B set column_in_B = null", becuase it thinks the column_in_B is foreign key pointing at primary key in A (and because row in A is deleted, it tries to clean the foreign key in B). BUT the column_in_B IS NOT a foreign key, and can't be modified, because it causes data lost (and this column is NOT NULL anyway in my case, causing data integerity exception to be thrown). Plese help me with this. How to model such relationships with Hibernate? (I would call it "virtual relationships", or "secondary relationships" or so: as they are not based on foreign keys, they are just some shortcuts which allows for retrieving related objects and quering for them with HQL)

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  • Convert C# Silverlight App To AZURE CLOUD Platform?!?!

    - by Goober
    The Scenario I've been following Brad Abrams Silverlight tutorial on his blog.... I have tried following Brads "How to deploy your app to the Cloud" tutorial however i'm struggling with it, even though it is in the same context as the first tutorial.... The Question Is the application structure essentially the same as the original "non-cloud based version"!? If not, which parts are different? (I get that there is a Cloud Service project added to the solution) - but what else?! Connection String Issue In my "Non-Cloud based application", I make use of the ADO.Net Entity Framework to communicate with my database. The connection string in my web.config file looks like: <add name="InmZenEntities" connectionString="metadata=res://*/InmZenModel.csdl|res://*/InmZenModel.ssdl|res://*/InmZenModel.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=CHASEDIGITALWS3;Initial Catalog=InmarsatZenith;Integrated Security=True;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" /></connectionStrings> However However the connection string that I get from SQL AZURE looks like: Server=tcp:k12ioy1rsi.ctp.database.windows.net;Database=master;User ID=simongilbert;Password=myPassword;Trusted_Connection=False; So how do I go about merging the two when I move the "non-cloud based application" to THE CLOUD?! Any help regarding converting a silverlight application to a cloud service and deploying it would be greatly appreciated

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  • c# web extracting programming, which libraries, examples samples please

    - by user287745
    I have just started programming and have made a few small applications in C and C#. My understanding is that programming for web and thing related to web is nowadays a very easy task. Please note this is for personnel learning, not for rent a coder or any money making. An application which can run on any Windows platform even Windows 98. The application should start automatically at a scheduled time and do the following. Connect to a site which displays stock prices summary (high low current open). Capture the data (excluding the other things in the site.) And save it to disk (an SQL database) Please note:- Internet connection is assumed to be there always. Do not want to know how to make database schema or database. The stock exchange has no law prohibiting the use of the data provided on its site, but I do not want to mention the name in case I am wrong, but it's for personal private use only. The data of summary of pricing is arranged in a table such that when copied pasted to MS Excel it automatically forms a table. need steps guidance please, examples, lbraries

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  • Access ADP - For/Against?

    - by webworm
    I have been tasked with taking an Access 97 application and moving the back-end data to SQL Server while moving the front end to Access 2003 (using Access Data Projects). In the process of this migration the back-end data structures will be changed significantly to support new functionality. If I had my wish we would not be using Access as the front end. I think our application would be much better served by WinForms, WPF, or a web application. We have the time needed to properly plan a business logic layer and implement an excellent solution but powers above me want to stay with Access because that is what they are familiar with. What I could use help with is pros/cons of continuing down this path of Access development. What are some legitimate arguments for and against using Access 2003? Here is what I have come up with so far. Pro Access: Already own Access 2003 licenses Easy GUI development Reports look nice Against Access Having to use VBA (Visual Basic for Applications) ADO vs DAO. Didn't Microsoft change things from Access 2002 to Access 2003? Not tied to Access runtime Choice in front end (WPF, WinForms, even ASP.NET) Maintainability True separation of logic from UI not possible Does Microsoft still support Access ADP? Perhaps there are other issues I am not aware off both for and against Access for application development. I am trying to keep an open mind while at the same time trying to maintain my sanity. I have been using C# since .NET was released and the thought of going back to VBA for six months makes my head hurt. Especially when I feel I could offer so much more if allowed to develop with modern languages and tools?

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  • Cross-platform and language (de)serialization

    - by fwgx
    I'm looking for a way to serialize a bunch of C++ structs in the most convenient way so that the serialization is portable across C++ and Java (at a minimum) and across 32bit/64bit, big/little endian platforms. The structures to be serialized just contain data, i.e. they're pure data objects with no state or behavior. The idea being that we serialize the structs into an octet blob that we can store in a database "generically" and be read out later on. Thus avoiding changing the database whenever a struct changes and also avoiding assigning each data member to a field - i.e. we only want one table to hold everything "generically" as a binary blob. This should make less work for developers and require less changes when structures change. I've looked at boost.serialize but don't think there's a way to enable compatibility with Java. And likewise for inheriting Serializable in Java. If there is a way to do it by starting with an IDL file that would be best as we already have IDL files that describe the structures. Cheers in advance!

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  • How to make a mapped field inherited from a superclass transient in JPA?

    - by Russ Hayward
    I have a legacy schema that cannot be changed. I am using a base class for the common features and it contains an embedded object. There is a field that is normally mapped in the embedded object that needs to be in the persistence id for only one (of many) subclasses. I have made a new id class that includes it but then I get the error that the field is mapped twice. Here is some example code that is much simplified to maintain the sanity of the reader: @MappedSuperclass class BaseClass { @Embedded private Data data; } @Entity class SubClass extends BaseClass { @EmbeddedId private SubClassId id; } @Embeddable class Data { private int location; private String name; } @Embeddable class SubClassId { private int thingy; private int location; } I have tried @AttributeOverride but I can only get it to rename the field. I have tried to set it to updatable = false, insertable = false but this did not seem to work when used in the @AttributeOverride annotation. See answer below for the solution to this issue. I realise I could change the base class but I really do not want to split up the embedded object to separate the shared field as it would make the surrounding code more complex and require some ugly wrapping code. I could also redesign the whole system for this corner case but I would really rather not. I am using Hibernate as my JPA provider.

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  • Need events to execute on timer events, metronome precision.

    - by user295734
    I setup a timer to call an event in my application. The problme is the event execution is being skewed by other windows operations. Ex. openning and window, loading a webpage. I need the event to excute exactly on time, every time. When i first set up the app, used a sound file, like a metronome to listen to the even firing, in a steady state, its firing right on, but as soon do something in the windows environment, the sound fires slower, then sort of sppeds up a bit to catch up. So i added a logging method to the event to ctahc the timer ticks. From that data, it appears that the timer is not being affected by the windows app, but my application event calls are being affected. I figured this out by checking the datetime.now in the event, and if i set it to 250 milliseconds, which is 4 clicks per second. You get data something like below. (sec):(ms) 1:000 1:250 1:500 1:750 2:000 2:250 2:500 2:750 3:000 3:250 3:500 3:750 (lets say i execute some windows event)(time will skew) 4:122 4:388 4:600 4:876 (stop doing what i was doing in windows) (going to shorten the data for simplicit, my list was 30sec long) 5:124 5:268 5:500 5:750 (you would se the time go back the same milliseconds it was at the begining) 6:000 6:250 6:500 6:750 7:000 7:250 7:500 7:750 So i'm thinking the timer continues to fire on the same millisecond every time, but its the event that is being skewed to fire off time by other windows operations. Its not a huge skew, but for what i need to accomplish, its unacceptable. Is there anyhting i can do in .NET, hoping to use XAML/WPF application, thats will correct the skewing of events? thx.

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  • lightweight webserver to integrate on client end.

    - by Gopal
    Hi ,... I need to create a python module that will be installed on end-user machines. One of the scripts in that module should be able to receive http POSTS (usually with some JSON formatted data in the body) and then pass on that data to an appropriate python script. I can think of two ways to do this: a) Open a listening server socket on port 80, wait for that http request to come in, parse it and then pass that data to another python script depending on the url that arrived. This method will not require the end-user to install a webserver. End user only has to install the python module. b) Have a mini-webserver installed along with the python module. The webserver will do the same job as [a] via CGI without me requiring to write the CGI functionality. But then the user will have to install the web-server (ie., the hassle of yet another install). Would like to avoid that if possible. IF [b] is the easier option, what is the smallest simplest webserver there is (preferably one that can be packaged as part of the python module itself so that it does not have to be separately installed). Must be opensource of course. regards Gopal

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