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• Subtract displaced mask using OpenCV

  - by dario_ramos

  I want to do: masked = image - mask But I want to "displace" mask. That is, move it vertically and horizontally (as long as the intersection between it and image is not empty, this would be valid). I have some hand-coded assembly (which uses MMX instructions) which does this, embedded in a C++ program, but it's unstable when doing vertical displacemente, so I thought of using OpenCV instead. Would it be possible to do this calling only one OpenCV function? Performance is critical; using OpenCV, time should be at least in the same order of magnitude as the assembly code.

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• Execute jQuery code when images have loaded from external resource

  - by Nick Swan

  Hi all, I'm getting users profile pictures from Facebook so their loading time varies quite a lot. When they have loaded I want to resize them. I have the resizing code working OK, but cannot get the actual code to execute reliably at the right time. According to the info I've found this should work: $('.userPic').load(function () { ... code to resize pictures }); But it doesn't seem 100% reliable. Any other hints or tips? Thanks Nick Swan

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• How to bind the arguments in NSString in iphone?

  - by Prash.......

  Hi, i developing an application in which i want to bind my own parameter with an URL for http post request. But i findout the serious problem during the string binding, The code snippet as follows: NSString *mainURL1 = @"http://xxx.xxx.xx.xx/webservice/Service.asmx?op=UserDetailsNew?"; NSString *mainURL2 = [mainURL1 stringByAppendingString:@"MobileNo=%@",txtMobile.text]; NSString *mainURL3 = [mainURL2 stringByAppendingString:@"&Country=%@",txtCountry.text]; NSString *mainURL4 = [mainURL3 stringByAppendingString:@"&UserName=%@",txtName.text]; NSString *mainURL5 = [mainURL4 stringByAppendingString:@"&ScreenName=%@",txtScreenname.text]; NSString *mainURL6 = [mainURL5 stringByAppendingString:@"&EmailId=%@",txtemailid.text]; NSString *mainURL7 = [mainURL6 stringByAppendingString:@"&Password=%@",txtpassword.text]; NSString *mainURL8 = [mainURL7 stringByAppendingString:@"&RetypePassword=%@",txtretypepassword.text]; NSString *mainURL9 = [mainURL8 stringByAppendingString:@"%20HTTP/1.1"]; on binding the runtime arguments it ginev me too many parameter appending in NSString function. how i solve above problem?

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• How to hide nested form from jQuery under IE8

  - by pduel

  An html segment with a div containing a form: <div class="hide"> Form header <form action='' method='post'> .... form content here </form> form footer </div> <script type="text/javascript"><!--// $(document).ready(function() { $('.hide').hide(); } //--></script> The jquery should hide the form, but does not do so under IE8. (version 8.0.60001) The form content gets hidden, as does the content within the class='hide' div but outside the form, but the form border continues to show, and retains its size. Does anybody have a workaround for this? jQuery is version 1.4.2 I tried to create a small problem demo in jsfiddle, but that site was not functional in the IE browser.

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• Inserting HTML5 video using JavaScript for iPad

  - by Vishal

  Hello, I am trying to insert a video into HTML using jQuery for iPad but all I see is a black screen. If I add the video tag directly to the HTML page all seems to work fine. Here is what I have in my JavaScript and I call this using a function for onClick event. var html = ""; html += '<video id="someVideo"'; html += ' width="'+settings.width+'" height="'+settings.height+'"' html += ' controls="controls">'; html += '<source src="'+url+'" type="video/mp4" />'; html += '</video>'; $("#videoDiv").html(html); Any help will be greatly appreciated Thanks

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• Datatables pagination characters "<<" and "<" not displaying correctly in IE and Safari

  - by Jaaromy

  I'm using the DataTables jQuery plugin and am having issues with the First and Previous pagination links displaying correctly in IE and Safari (Firefox and Opera work). "<<" and "<" display as "<" and "". $(document).ready(function () { oTable = $('#fileList').dataTable({ "bJQueryUI": true, "sPaginationType": "full_numbers", "oLanguage": { "sSearch": "Search all columns:", "oPaginate": { "sNext": '>', "sLast": '>>', "sFirst": '<<', "sPrevious": '<' } } }); I have attempted to escape '\<\<' to no avail. Any ideas?

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• JavaScript constructors inside a namespace

  - by Joe

  I have read that creating a namespace for JavaScript projects helps to reduce conflicts with other libraries. I have some code with a lot of different types of objects for which I have defined constructor functions. Is it good practice to put these inside the namespace as well? For example: var shapes = { Rectangle: function(w, h) { this.width = w; this.height = h; } }; which can be called via: var square = new shapes.Rectangle(10,10);

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• Confusion in bind call in socket programming

  - by Tarun

  i was learning socket programming in unix using c/c++. I am confused with one function call bind(params..). Actually it takes the adreess structure "sockaddr_in" and we can create the structure in the following way sockaddr_in.*** = somthing.. sockaddr_in..s_addr htonl(INADDR_ANY) **Passing INADDR_ANY will alow to bind all local addresses** My question is , why do we need to use "INADDR_ANY" ? In my knowledge every machine can has only one unique IP Address. In this way there is only one address associated with the machien. Thye bind call should directly bind the socket to the single available address. Please explain what are the different scenarios and why is it so?

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• Custom ListView Row, can no longer select rows...

  - by LDK

  Here's my ScrollView: middle: SC.ScrollView.design({ layout: { top: 36, bottom: 32, left: 0, right: 0 }, backgroundColor: '#ccc', contentView: SC.ListView.design({ contentBinding: 'Spanish.wordsController.arrangedObjects', selectionBinding: 'Spanish.wordsController.selection', contentValueKey: "word", contentDisplayProperties: 'word english'.w(), selectOnMouseDown: YES, exampleView: Spanish.CustomListItemView }) }) and here is my custom listView row: Spanish.CustomListItemView = SC.View.extend({ render: function(context, firstTime){ var content = this.get('content'); var word = content.get('word'); var english = content.get('english'); context = context.begin().push('&nbsp;%@ (%@)'.fmt(word,english)).end(); return sc_super(); } }); The above works as expected, except that I can no longer select views. When I comment out "exampleView: Spanish.CustomListItemView" I can select rows, but they are no longer formatted properly. Why can I no longer select rows when I use exampleView?

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• Validate a date range within MySQL query

  - by fishcracker

  (This question may seem easy or kind of noobish, by that I pardon my ignorance.) I used PDO query to use SELECT then fetch some values, it comes to a point that I need to fetch only some entries that within its start date and end date. My database +----------+-----------------+----------------------+--------------------+ | id (INT) | title (VARCHAR) | start_date (VARCHAR) | end_date (VARCHAR) | +----------+-----------------+----------------------+--------------------+ | 1 | buddy | 2012-11-26 | 2012-11-30 | | 2 | metro | 2012-12-05 | 2012-12-20 | | 3 | justin | 2012-11-28 | 2012-12-01 | +----------+-----------------+----------------------+--------------------+ My query is as follows: $query = "SELECT title, start_date, end_date FROM debts WHERE start_date >= CURDATE() AND end_date >= CURDATE()"; What I want to achieve is whenever the start_date is today or greater but not exceeding the end_date it will be valid. This will return the row for id 1, however if I change the start_date to 2012-11-25, it will fail due to the first condition on AND. I'm really confuse on this since I am new to this, is there any built-in function to handle this kind of situation?

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• How to put PrintWriter object content in to table cell

  - by user3599482

  I have a small problem about a content returning from servlet to put in table cell. In javascript I am calling servlet method using post, it returns some content and I have to put it in two different <td> cells. here is my code, In javascript, $.post('<%=request.getContextPath()%>/controller/UserLockController',{'userName':userName,'status':status}, function(data) { document.getElementById("status_"+userName).innerHTML=data; document.getElementById("td_"+userName).innerHTML=data; }); in servlet it writes as, out.println("<td id=\"status_"+inputParam+"\">Locked</td>"); out.println("<td id=\"td_"+inputParam+"\"><a href=\"#\" class=\"btn btn-sm btn-primary unlockBtn\" id=\"togBtn_"+inputParam+"\" onClick=\"LockAccount('"+inputParam+"','"+status+"')\">UnLock</td>"); Here content is returning but problem is the both <td> return from servlet will fit in single cell of html table. how to solve this please help me.

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• Drupal limit number of menu items in primary links

  - by ninusik

  Is there a way to set a limit on how many menu items users can add to Primary Links menu? I'm working on a Drupal site and I have a horizontal primary links nav bar. There is only room for no more than 7-8 links in the nav bar. I don't want the future maintainer of the site to add more than 8 items to the menu. Is there a way I can set a limit on that? Some module or override function? Thanks,

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• more efficient way to pickle a string

  - by gatoatigrado

  The pickle module seems to use string escape characters when pickling; this becomes inefficient e.g. on numpy arrays. Consider the following z = numpy.zeros(1000, numpy.uint8) len(z.dumps()) len(cPickle.dumps(z.dumps())) The lengths are 1133 characters and 4249 characters respectively. z.dumps() reveals something like "\x00\x00" (actual zeros in string), but pickle seems to be using the string's repr() function, yielding "'\x00\x00'" (zeros being ascii zeros). i.e. ("0" in z.dumps() == False) and ("0" in cPickle.dumps(z.dumps()) == True)

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• dynamic searchable fields, best practice?

  - by boblu

  I have a Lexicon model, and I want user to be able to create dynamic feature to every lexicon. And I have a complicate search interface that let user search on every single feature (including the dynamic ones) belonged to Lexicon model. I could have used a serialized text field to save all the dynamic information if they are not for searching. In case I want to let user search on all fields, I have created a DynamicField Model to hold all dynamically created features. But imagine I have 1,000,000,000 lexicon, and if one create a dynamic feature for every lexicon, this will result creating 1,000,000,000 rows in DynamicField model. So the sql search function will become quite inefficient while a lot of dynamic features created. Is there a better solution for this situation? Which way should I take? searching for a better db design for dynamic fields try to tuning mysql(add cache fields, add index ...) with current db design

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• How to display conformation text using jquery

  - by kumar

  I have showresponse funtion somehting like this.. function showResponse(responseText, statusText, xhr, $form) { if (responseText[0].substring(0, 16) != "System.Exception") { $('#error-msg-ID').html('<strong>Update successful.</strong>'); } else { $('#error-msg-ID').html('<strong>Update failed.</strong> ' + responseText[0].substring(0, 48)); } $('#error-msg-ID').removeClass('hide'); $('#gui-stat-').html(responseText[1]); } $('#exc-').ajaxForm({ target: '#error-msg-ID', beforeSubmit: validate_excpt, success: showResponse, dataType: 'json' }); Div tag is.. <div id="#error-msg-ID"> </div> After update successfull I am not able to show Updatesuccessful mesage on divtag? do i am missing something?

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• Cannot implicitly convert type 'char*' to 'bool'

  - by neeraj

  i was trying to passing pointer value in the function , i really got stuck here I am a beginner , not getting what value should be put this is programme from the reference of the book "Cracking the coding interview " By Gayle Laakmann McDowell, class Program { unsafe void reverse(char *str) { char* end = str; char tmp; if (str) //Cannot implicitly convert type 'char*' to 'bool' { while(*end) //Cannot implicitly convert type 'char*' to 'bool' { ++end; } --end; while(str<end) { tmp = *str; *str+= *end; *end-= tmp; } } } public static void Main(string[] args) { } }

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• win7 + vc7.1 + mfc = stackoverflow

  - by fogbit

  Hello! I've moved my vc7.1 project from WInXP to Win7. After rebuilding i got stackoverflow error in function _malloc_dbg when i start the program. "Unhandled exception at 0x0051bf0f in XXX.exe: 0xC00000FD: Stack overflow." Call stack: msvcr71d.dll!_malloc_dbg(unsigned int nSize=140, int nBlockUse=2, const char * szFileName=0x10267784, int nLine=163) msvcr71d.dll!_calloc_dbg(unsigned int nNum=1, unsigned int nSize=140, int nBlockUse=2, const char * szFileName=0x10267784, int nLine=163) msvcr71d.dll!_mtinit() msvcr71d.dll!_CRTDLL_INIT(void * hDllHandle=0x10200000, unsigned long dwReason=1, void * lpreserved=0x0018fd24) I tried to set up different stacksizes in project options (from 10 to 100 mbytes), in all cases i got this error. How can i fix this?

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• How to Execute an Oracle SQL Statements with VBScript

  - by Arno Conradie

  I am trying to execute an Oracle SQL statement or Oracle Functions through Microsoft VBScript and the loop throught the result set or display the value returned by the function So far I have managed to connect to Oracle via SQLPlus*, but now I am stuck. Can anybody help? Dim output Dim WshShell, oExec, input set WshShell = CreateObject("WScript.Shell") set oEnv=WshShell.Environment("Process") cmdString = "C:\Oracle\11g\product\11.1.0\ruby\BIN\sqlplus.exe -S stradmin/stradmin@ruby select * from dual" Set oExec = WshShell.Exec(cmdString) WScript.Echo "Status" & oExec.Status Do While oExec.Status = 0 WScript.Sleep 2 Loop input = "" Do While Not oExec.StdOut.AtEndOfStream input = input & oExec.StdOut.Read(1) Loop wscript.echo input

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• jquery adding in select list by textbox

  - by mazhar

  ok what i am trying to do is to add something in the textbox and after pressing the add button it should go into the select list. how would i do that with jquery? I am not really able to make it work by your method .Please help? What i am doing wrong <%= Html.ListBox("FeatureLists", ViewData["FeatureListListBox"] as MultiSelectList)% $("#add").click(function() { var val = $("#txtaddfeature").val(); alert("aaa"); $("", { 'value': val, text: val }).appendTo("#FeatureLists"); //$("#textbox").val(''); here if you want to clear the value for next time });

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• How to skip interstitial in a django view if a user hits the back button?

  - by Jose Boveda

  I have an application with an interstitial page to hold the user while an intensive operation runs in the background (takes anywhere from 30 secs to 1 minute). Once the operation is done, the user is redirected to the results page. Once on the result page, typical user behavior is to hit the 'back' button to perform the operation on a different input set. However, the back button takes them to the interstitial, not the original form. The desired behavior is to go back to the original form, skipping the interstitial entirely. I'd like this to be default behavior if the user goes to the interstitial page from anywhere but the original form. I thought I could create this by using the @never_cache function decorator in my view for the interstitial, and logic based on request.META['HTTP_REFERER'], however the page doesn't respect these. The browser's back button still trumps this behavior. Any ideas on how to solve this issue?

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• WordPress Monthly Archive by Year

  - by PaulDavis

  WordPress extraordinaires, I need your help! I need to be able to list the archives, but in a slightly different way than the WP codex, or an hour of Googling will show me. I need the months of the year, as the generic archive function, but only for one year at a time. So, list all the months in 2007. I'll need to be able to use this multiple times in the same template too, for different years. I've got a feeling query_posts might be the way, but I'm not too sure. Anyone got some ideas?

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• Compute rolling window covariance matrix

  - by user1665355

  I am trying to compute a rolling window (shifting by 1 day) covariance matrix for a number of assets. Say my df looks like this: df <- data.frame(x = 0:4, y = 5:9,z=1:5,u=4:8) How would a possible for loop look like if I want to calculate a covariance matrix on a rolling basis by shifting the rolling window by 1 day? Or should I use some apply family function? What time series class would be preferrable if I want to create a time series object for the loop above? I simply can't get it... Best Regards

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• Prevent click event on the clicked element?

  - by nainy

  I have a click event on the body of my document: $("body").on('click.findElem', function(e) { e.stopPropagation(); e.preventDefault(); self.hinter(e.target); return false; }); It basically catches the clicked target and does something to it. However, there are some targets that already have a click event on them, and they prevent my click from being executed at all. How do I overcome that issue? I tried unbinding it, but the click doesn't even work at all to actually execute the unbinding.

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• how to make condition to update table ?

  - by newBie

  hi..i want to make condition to update my table if there's already same data (in the same column) inserted in the table. im using If String.ReferenceEquals(hotel, hotel) = False Then insertDatabase() Else updateDatabase() End If this is the updateDatabase() code Dim sql2 As String = "update infoHotel set nameHotel = N" & FormatSqlParam(hotel) & _ ", knownAs1 = N" & FormatSqlParam(KnownAs(0)) & _ ", knownAs2 = N" & FormatSqlParam(KnownAs(1)) & _ ", knownAs3 = N" & FormatSqlParam(KnownAs(2)) & _ ", knownAs4 = N" & FormatSqlParam(KnownAs(3)) & _ " where hotel = " & hotel & ")" the function manage to go into updateDatabase() but has some error saying "Incorrect syntax near 'Oriental'." Oriental is the data inserted in the table. is it suitable to use ReferenceEquals? im using vb.net and sql database..tq

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• How to color HTML elements based on parsing a user command string

  - by Anonymous the Great

  I'm working on a little parsing thing to color objects. For an example, you could type red:Hi!: and "Hi!" would be red. This is my not working code: <script type="text/javascript"> function post() { var preview = document.getElementById("preview"); var submit = document.getElementById("post"); var text = submit.value; <?php str_replace("red:*:",'<i class="red">*</i>',text); ?> preview.value = text; } </script>

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