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  • Another answer to the CAPTCHA problem?

    - by Xeoncross
    Most sites at least employ server access log checking and banning along with some kind of bot prevention measure like a CAPTCHA (those messed-up text images). The problem with CAPTCHAs is that they poss a threat to the user experience. Luckily they now come with user friendly features like refresh and audio versions. Anyway, like linux vs windows, it isn't worth the time of a spammer to customize and/or build a script to handle a custom CAPTCHA example that only pertains to one site. Therefore, I was wondering if there might be better ways to handle the whole CAPTCHA thing. In A Better CAPTCHA Peter Bromberg mentions that one way would be to convert the image to HTML and display it embedded in the page. On http://shiflett.org/ Chris simply asks users to type his name into an input. Examples like this are ways to simplifying the CAPTCHA experience while decreasing the value for spammers. Does anyone know of more good examples I could use or see any problem with the embedded image idea?

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  • How to use jquery ajax to set the content of a div, then call JS from that div

    - by devzero
    I'm using JQuery to load the content of an mvc usercontroll: function menuShowModal(a) { $.ajax( { url: a.href, success: function (result) { $('#modalDialog').dialog('close'); var $dialog = $('<div id=\'modalDialog\'></div>') .html(result) .dialog({ autoOpen: true, title: 'Basic Dialog', modal: true }); }, cache: false, type: 'get' }); return false; } The returned HTML looks like this: <input type="text" id="navnet" value="test" /> <script type="text/javascript"> $(document).ready( function () { alert($("#navnet").val()); } ) </script> The problem is that the alert returns "undefined" and not "test" as it should, in other words the JS is executed before the html is inserted, how do I work around this?

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  • jQuery live change problem

    - by Milos
    When I click an element from list, jQuery get class from clicked element and write it in input field. Then value from input need to be written in div#content without any action. HTML: <ul> <li class="NewYork">New York</li> <li class="Paris">Paris</li> <li class="Moscow">Moscow</li> </ul> <input type="text" id="city" value="" /> <div id="content"></div> jQuery: $(document).ready(function() { $('ul li').live('click', function() { var select_value = $(this).attr('class'); $('input#city').val(select_value); return false; }); $('input#city').live('change', function() { var content = $(this).val(); $('#content').text(content+' is beautiful city'); }); });

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  • Select a certain amount of checkbox arrays on the page

    - by Joris Tobebech
    Hi guys, so i wrote a function to select a certain amount of checkboxes on the page, the number retrieves fine when i message box it but no checkboxes are checked. here is my function function checkAmount(number) { alert(number); var boxes = document.getElementsByTagName("input"); for (var i = 0; i < number; i++) { if (boxes[i].name == "vote[]") { boxes[i].checked = true; } } } and here is my execution code OnClick="checkAmount(document.getElementById(\'ammount\').value)"

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  • Interpolating 1D Gaussian into 2D Gaussian

    - by Drazick
    Let's say I have a 1D Gaussian function. Its length is 600 for that matter. I want to Interpolate it into 2D Gaussian of the size 600 X 600. This is the code I wrote (OTFx is the Gaussian Function, OTF - 2d Interpolated Function): [x, y] = meshgrid([-300:299], [-300:299]); r = sqrt((x .^ 2) + (y .^ 2)); OTF = interp1([-300:299], OTFx, r(:), 'spline'); OTF = reshape(OTF, [600, 600]); The problem is I get Overshoot at the end: How can I prevent it? Is there better Interpolating algorithm for Monotonic Descending Functions?

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  • In Javascript, is there a technique where I can execute code after a return?

    - by Christopher Altman
    Is there a technique where I can execute code after a return? I want to return a value then reset the value without introducing a temporary variable. My current code is: function(a){ var b; if(b){ var temp = b; //I want to avoid this step b = false; return temp; }else{ b = a; return false; }; }; I want to avoid the temp var. Is that possible? var b holds a value between function calls because it is a memoization styled function.

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  • Designing a database file format

    - by RoliSoft
    I would like to design my own database engine for educational purposes, for the time being. Designing a binary file format is not hard nor the question, I've done it in the past, but while designing a database file format, I have come across a very important question: How to handle the deletion of an item? So far, I've thought of the following two options: Each item will have a "deleted" bit which is set to 1 upon deletion. Pro: relatively fast. Con: potentially sensitive data will remain in the file. 0x00 out the whole item upon deletion. Pro: potentially sensitive data will be removed from the file. Con: relatively slow. Recreating the whole database. Pro: no empty blocks which makes the follow-up question void. Con: it's a really good idea to overwrite the whole 4 GB database file because a user corrected a typo. I will sell this method to Twitter ASAP! Now let's say you already have a few empty blocks in your database (deleted items). The follow-up question is how to handle the insertion of a new item? Append the item to the end of the file. Pro: fastest possible. Con: file will get huge because of all the empty blocks that remain because deleted items aren't actually deleted. Search for an empty block exactly the size of the one you're inserting. Pro: may get rid of some blocks. Con: you may end up scanning the whole file at each insert only to find out it's very unlikely to come across a perfectly fitting empty block. Find the first empty block which is equal or larger than the item you're inserting. Pro: you probably won't end up scanning the whole file, as you will find an empty block somewhere mid-way; this will keep the file size relatively low. Con: there will still be lots of leftover 0x00 bytes at the end of items which were inserted into bigger empty blocks than they are. Rigth now, I think the first deletion method and the last insertion method are probably the "best" mix, but they would still have their own small issues. Alternatively, the first insertion method and scheduled full database recreation. (Probably not a good idea when working with really large databases. Also, each small update in that method will clone the whole item to the end of the file, thus accelerating file growth at a potentially insane rate.) Unless there is a way of deleting/inserting blocks from/to the middle of the file in a file-system approved way, what's the best way to do this? More importantly, how do databases currently used in production usually handle this?

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  • iPhone: UIImageView not showing images

    - by George
    Hello, I've got UIImageView drawn in my nib-file and it's connected to a imageView iboutlet. I can load single pictures which will show up very nicely, but when it comes to drawing many images separately as like an animation, images won't show. I've got drawImage() function which takes NSData-objects(image data) and draws it to a screen(imageView). Main function has got for loop which loops 300 times as quickly as it can and each time it calls that drawImage function and passes different image data to it. Sometimes when I execute this code, last picture from that "animation" shows up, sometimes not at all. Maybe I need to schedule enough time for imageView so that the image can be shown? Hope someone has some clues. Thanks in advance!

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  • extjs4 display tooltip on button click instead of mouse hover

    - by user856753
    I am trying to add a on click listener to the below tooltip. I do not want the tooltip to display on mouse hover. Instead it need it show on button click. Do I have to add a handler function inside a listener? { xtype: 'button', cls:'my-btn', iconCls:'question', src:'../www/css/slate/btn/question.png', padding: '5 0 0 0', listeners: { render: function(cmp) { Ext.create('Ext.tip.ToolTip', { closable:true, hideDelay : 3000, padding: '0 0 0 0', maxWidth:400, width:800, target: cmp.el, html: "<b>read-only</b>:Users will have read only access to all pages", getTargetXY: function() { return [810, 340]; } }); } } },

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  • Why does an onclick property set with setAttribute fail to work in IE?

    - by Aeon
    Ran into this problem today, posting in case someone else has the same issue. var execBtn = document.createElement('input'); execBtn.setAttribute("type", "button"); execBtn.setAttribute("id", "execBtn"); execBtn.setAttribute("value", "Execute"); execBtn.setAttribute("onclick", "runCommand();"); Turns out to get IE to run an onclick on a dynamically generated element, we can't use setAttribute. Instead, we need to set the onclick property on the object with an anonymous function wrapping the code we want to run. execBtn.onclick = function() { runCommand() }; BAD IDEAS: You can do execBtn.setAttribute("onclick", function() { runCommand() }); but it will break in IE in non-standards mode according to @scunliffe. You can't do this at all execBtn.setAttribute("onclick", runCommand() ); because it executes immediately, and sets the result of runCommand() to be the onClick attribute value, nor can you do execBtn.setAttribute("onclick", runCommand);

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  • JQuery Scrollable List Dissapears if scrolled IE7

    - by namtax
    Hi there I have created a time picker using jquery, using the following code // Display Time Picker $('.time').click(function(){ $('.timePicker').remove(); var thisTime = $(this); var timePicker = '<ul class="timePicker">' timePicker += '<li>09:00</li>' timePicker += '<li>09:15</li>' timePicker += '</ul>' thisTime.after(timePicker); $('.timePicker').fadeIn() $('.timePicker li').click(function(){ term = $(this).html(); $(thisTime).val(term); $('.timePicker').remove(); }); }).blur(function(){ $('.timePicker').fadeOut(); }); This adds a dropdown scrollable list of times to any input field with the class "time". This functions as expected in all browsers apart from IE7, where if I scroll the list to choose a time lower down in the list, the list dissapears.. Hope that makes sense, any help would be much appreciated Many thanks

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  • Web App fails when moved to production environment. Which server permissions do I need?

    - by Ashley Ward
    I have developed a small web app. This app allows users to upload images. It also produces text files with the names of those images (the names are stored and retrieved to/from an MySQL Database.) I have developed this app using MAMP. To create the uploaded image files I use the PHP function imagejpeg('my/path/name.jpg') and to delete the files I use the PHP function unlink('folder1/folder2/name.jpg') to write to the text document I am using the function fopen('folder1/folder2/name.txt', 'w') all three of these functions produce errors related to permissions - now the site has been moved to a live hosting environment. Why is this? and what permissions do I need to set the folder's folder1 and folder2 to? I know that permission 777 is generally bad because it opens up your server to the public. However what I have found is that the functions fail to work unless I use 777 on the folders. Can anyone shed any light on my dilemma?

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  • Explain ML type inference to a C++ programmer

    - by Tsubasa Gomamoto
    How does ML perform the type inference in the following function definition: let add a b = a + b Is it like C++ templates where no type-checking is performed until the point of template instantiation after which if the type supports the necessary operations, the function works or else a compilation error is thrown ? i.e. for example, the following function template template <typename NumType> NumType add(NumType a, NumType b) { return a + b; } will work for add<int>(23, 11); but won't work for add<ostream>(cout, fout); Is what I am guessing is correct or ML type inference works differently? PS: Sorry for my poor English; it's not my native language.

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  • Unable to unload content in XML gallery - AS3

    - by Dimitree
    I have an XML gallery and I want in the next button function to "unload" all content and load new XML file. So far I use this code: function navigateToRight(evt:MouseEvent):void{ if (thumbsHolder.numChildren > 0){ while (thumbsHolder.numChildren) { thumbsHolder.removeChildAt(0); } removeloaded();} loadXml("2.xml"); } Where removeloaded function is loader.unload(); Unfortunately when i press next button I can see the new xml file is loaded but the items are from the previous xml file.

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  • Is it possible to use the Spring MVC on JBoss App server?

    - by ikky
    Hi. Is it possible to use Spring MVC on JBoss App server? If so, how? Used the Spring MVC with Tomcat Apache server, but now i have to move my project to a JBoss app server. But i'm getting an error, and i'm not sure why. It seems like i can't use my classes. 125 ERROR [Engine] StandardWrapperValve[project]: Servlet.service() for servlet project threw exception java.lang.NullPointerException at java.util.Hashtable.containsKey(Hashtable.java:307) at com.scap.handle.ControlStatusContainer.deleteUser(ControlStatusContainer.java:70) at web.shnController.handleRequest(shnController.java:121) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:875) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:807) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:571) at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:501) Anyone got a suggestion? Thanks in advance.

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  • acts_as_solr returns all rows in the database when using the model as search query

    - by chris Chan
    In our application we're using acts_as_solr for search. Everything seems to be running smoothly except for the fact that using the model name as the search query returns every single row in the table. For example, let's say we have a users table. We specify acts_as_solr in our model to search the fields first name, last name and handle acts_as_solr :fields = [:handle, :lname, :fname]. When you use "user" as the search term it returns every single user in the system, or every row in the database as a result. Has anyone else run into this?

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  • jquery, moving the current item to the top

    - by azz0r
    Hello, The problem I'm having is that if the fourth item has a long description, it cuts off as it goes below #features. What I was hoping is someone would have a suggestion on how to make the current item selected to move to the top? Code below: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <script type="text/javascript" src="/library/jquery/1.4.js"></script> <script> Model.FeatureBar = { current:0, items:{}, init: function init(options){ var me = this; me.triggers = [] me.slides = [] this.container = jQuery('#features'); jQuery('.feature').each(function(i){ me.triggers[i] = {url: jQuery(this).children('.feature-title a').href, title: jQuery(this).children('.feature-title'),description:jQuery(this).children('.feature-description')} me.slides[i] = {image: jQuery(this).children('.feature-image')} }); for(var i in this.slides){ this.slides[i].image.hide(); this.triggers[i].description.hide(); } Model.FeatureBar.goToItem(0); setInterval(function(){Model.FeatureBar.next()},5000); }, next: function next(){ var i = (this.current+1 < this.triggers.length) ? this.current+1 : 0; this.goToItem(i); }, previous: function previous(){ var i = (this.current-1 > 1) ? this.current-1 : this.triggers.length; this.goToItem(i); }, goToItem: function goToItem(i) { if (!this.slides[i]) { throw 'Slide out of range'; } this.triggers[this.current].description.slideUp(); this.triggers[i].description.slideDown(); this.slides[this.current].image.hide(); this.slides[i].image.show(); this.current = i; }, } </script> </head> <body> <div id="features"> <div class="feature current"> <div style="display: none;" class="feature-image"> <a href="google.com"><img src="/design/images/four-oh-four.png"></a> </div> <h2 class="feature-title"><a href="google.com">Item 3</a></h2> <p style="display: none;" class="feature-description"><a href="google.com">Item 3 description</a></p> </div> <div class="feature"> <div class="movie-cover"> <a href="/movie/movie"><img src="/image1" alt="" title=""></a> </div> <div style="display: block;" class="feature-image"> <a href="/rudeboiz-14-arse-splitters/movie"><img src="/images/Featured/rude.png"></a> </div> <h2 class="feature-title"><a href="/rude/movie">Item 2</a></h2> <p style="display: block;" class="feature-description"><a href="/rude/movie">Item 2 description</a></p> </div> <div class="feature"> <div style="display: none;" class="feature-image"> <a href="/pissed-up-brits/movie"><img src="/design/images/four-oh-four.png"></a> </div> <h2 class="feature-title"><a href="/pis/movie">Item 1</a></h2> <p style="display: none;" class="feature-description"><a href="/pis/movie">Item one description</a></p> </div> <div class="feature"> <div style="display: none;" class="feature-image"> <a href="what.com"><img src="/images/Featured/indie.png"></a> </div> <h2 class="feature-title"><a href="what.com">Item 4</a></h2> <p style="display: none;" class="feature-description"><a href="what.com">Item 4 description</a></p> </div> </div> </body> </html>

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  • Simple XML parsing with Google Picasa API and JQuery

    - by zeedog
    I'm starting to look into Google's Picasa API for photo data, which provides you with a big XML file with info about albums and photos. I'm doing some quick and dirty tests to parse the XML file (which is saved locally to my hard drive for now) with JQuery and pull out the album id's, which are stored as "gphoto:id" tags, and display them in a div: $(document).ready(function() { $.get( 'albums.xml', function(data) { $(data).find('entry').each(function() { var albumId = $(this).children('gphoto:id').text(); $('#photos').append(albumId + '<br />'); }) }) }) I'm getting the following error in the console: jquery.js:3321 - Uncaught Syntax error, unrecognized expression: Syntax error, unrecognized expression: id This will work with other tags in the XML file (such as title, author, updated, etc.), but I'm trying to understand what's going on here. Does it have to do with the colon in "gphoto:id", somehow?

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  • python multiprocess update dictionary synchronously

    - by user1050325
    I am trying to update one common dictionary through multiple processes. Could you please help me find out what is the problem with this code? I get the following output: inside function {1: 1, 2: -1} comes here inside function {1: 0, 2: 2} comes here {1: 0, 2: -1} Thanks. from multiprocessing import Lock, Process, Manager l= Lock() def computeCopyNum(test,val): l.acquire() test[val]=val print "inside function" print test l.release() return a=dict({1: 0, 2: -1}) procs=list() for i in range(1,3): p = Process(target=computeCopyNum, args=(a,i)) procs.append(p) p.start() for p in procs: p.join() print "comes here" print a

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  • My PowerShell functions do not appear to be registered

    - by Frank
    Hi there, I have a script saved in a ps1 file in which I define 2 functions as such: function Invoke-Sql([string]$query) { Invoke-Sqlcmd -ServerInstance $Server -Database $DB -User $User -Password $Password -Query $query } function Get-Queued { Invoke-Sql "Select * From Comment where AwaitsModeration = 1" } In the PowerShell console I then call the ps1 file by typing it in (it's in a folder in the path, and autocompletion works) However, I cannot start using the functions. I am confused, because when I copy / paste the functions into the console, all is fine and they work. I also have a function defined in my profile, and it works. Where am I thinking wrong, why doesn't it work what I'm trying to do?

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  • How to replace strings with javascript?

    - by Damiano
    Hello everybody, I have this function: function emoticons(text){ var url = "http://www.domain.it/images/smilies/"; var emt = { ":D" : 'icon_e_biggrin.gif', ":-D" : 'icon_e_biggrin.gif', ":)" : 'icon_e_smile.gif', ":-)" : 'icon_e_smile.gif', ";)" : 'icon_e_wink.gif', "';-)" : 'icon_e_wink.gif', ":(" : 'icon_e_sad.gif', ":-(" : 'icon_e_sad.gif', ":o" : 'icon_e_surprised.gif', ":?" : 'icon_e_confused.gif', "8-)" : 'icon_cool.gif', ":x" : 'icon_mad.gif', ":P" : 'icon_razz.gif' }; for (smile in emt){ text = text.replace(smile, '<img src="' + url + emt[smile] + '" class="emoticons" />'); } return (text); } As you know .replace() convert the first occurence, how to replace more then one emoticon inside the text? How to change this function? Thank you very much!

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  • How do I separate functionality with Javascript code to set Timeout?

    - by GIVE-ME-CHICKEN
    I have the following code: var comparePanel = $(__this.NOTICE_BODY); clearTimeout(__this._timeout); comparePanel.addClass(__this.VISIBLE); __this._timeout = setTimeout(function () { comparePanel.removeClass(__this.CL_VISIBLE); }, 3000); } }) The following has been repeated a few times: __this._timeout = setTimeout(function () { comparePanel.removeClass(__this.CL_VISIBLE); }, 3000); I want to be able to do something like this: __this._timeout = setTimeout(comparePanel, 3000); How do I define and call that function? PS. I am very very new to JavaScript so any explanation of what is going on is greatly appreciated.

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  • SecurityException when trying to export a java resource

    - by thecoop
    I'm trying to get the source of a java resource stored in an oracle database using this code (connecting as SYSTEM for testing): DECLARE javalob CLOB; BEGIN DBMS_LOB.CREATETEMPORARY(javalob, false); DBMS_JAVA.EXPORT_RESOURCE('RESOURCENAME', 'SCHEMA', javalob); DBMS_OUTPUT.PUT_LINE(javalob); END; But when I try to run it I get this: Java call terminated by uncaught Java exception: java.lang.SecurityException: cannot read <Resource Handle: RESOURCENAME|SCHEMA|301> because SYSTEM does not have execute privilege on it This thing is, I'm not sure how to grant permissions on <Resource Handle: RESOURCENAME|SCHEMA|301>, as this isn't a SQL or PL/SQL object. And why doesn't SYSTEM have access to it anyway?

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  • Prototype mouseleave for two connected elements

    - by TenJack
    I have created a small navigation element that is positioned right on top of another element. It is only shown when a user mousenters/mouseovers the main element. I am having some trouble with the prototype. I would like this small nav element to be hidden when a user mouses out of the main box, but I would also like the small nav element to remain visible if a user mouses out of the main box but mouses into the small nav at the same time. This is my attempt so far with some pseudo-code to hopefully explain: $('main_box').observe('mouseenter', function(){ $('small_div').show() }) $('main_box').observe('mouseleave', function(){ if this element is $('small_div') then Event.stop() $('small_div').observe('mouseleave', function(){ if this element is $('main_box') Event.stop observe $('main_box') mouseleave else $('small_div').hide(); }) else $('small_div').hide(); }) The main thing I'm having trouble with is figuring out what element the mouse is over at a given point in time. Is there a way to do something like: on mouseleave do blah unless the mouse is over a specific element then do not do blah?

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  • Handling Incoming Data from Multiple Sockets in Python

    - by user859434
    Background: I have a current implementation that receives data from about 120 different socket connections in python. In my current implementation, I handle each of these separate socket connections with a dedicated thread for each. Each of these threads parse the data and eventually store it within a shared locked dictionary. These sockets DO NOT have uniform data rates, some sockets get more data than others. Question: Is this the best way to handle incoming data in python, or does python have a better way on handling multiple sockets per thread?

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