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• jQuery draggable + droppable: how to snap dropped element to dropped-on element

  - by 10goto10

  I have my screen divided into two DIVs. In the left DIV I have a few 50x50 pixel DIVs, in the right DIV I have an empty grid made of 80x80 LIs. The DIVs on the left are draggable, and once dropped on a LI, they should snap to center of that LI. Sounds simple, right? I just don't know how to get this done. I tried by manipulating the dropped DIV's top and left CSS properties to match those of the LI they're dropped into, but the left and top properties are relative to the left DIV. How can I best have the dropped element snap to the center of the element it's dropped into? That's gotta be simple, right? Edit: I'm using jQuery UI 1.7.2 with jQuery 1.3.2. Edit 2: For whoever else has this problem, this is how I fixed it: I used Keith's solution of removing the dragged element and placing it inside the dropped-on element in the drop callback of the droppable plugin: function gallerySnap(droppedOn, droppedElement) { $(droppedOn).html('<div class="drop_styles">'+$(droppedElement).html()+'</div>' ); $(droppedElement).remove(); } I don't the dropped element to be draggable again, but if you do, just bind draggable to it again. For me this method also solved the problem I had when positioning the dropped elements (which would be relative to the left DIV) and scrolling inside the second DIV. (Elements would remain fixed on page, now they scroll along). I did play with the snap options to make it look good while dragging, so thanks to karim79 for that suggestion. I probably won't win any Awesome Code prizes with this, so if you see room for improvement, please share!

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• AutoMapper a viable alternative to two way databinding using a FormView?

  - by tbone

  I've started using the FormView control to enable two way databinding in asp.net webforms. I liked that it saved me the trouble of writing loadForm and unloadForm routines on every page. So it seemed to work nicely at the start when I was just using textboxes everywhere....but when it came time to start converting some to DropDownLists, all hell broke lose. For example, see: http://stackoverflow.com/questions/2435185/not-possible-to-load-dropdownlist-on-formview-from-code-behind ....and I had many additional problems after that. So I happened upon an article on AutoMapper, which I know very little about yet, but from the sounds of it, this might be a viable alternative to two-way databinding a form to an domain entity object? From what I understand, AutoMapper basically operates on naming convention, so, it will look for matched names properties(?) on the source and destination objects. So, basically, I have all my domain entities (ie: Person) with properties (FirstName, LastName, Address, etc)....what I would like to be able to do is declare my asp controls with those exact same names, and have automapper do the loading and unloading. One obvious caveat is that AutoMapper would have to know the proper property name for each control type, ie: Person.FirstName -- form.FirstName*.Text* Person.Country -- form.Country.SelectedValue Person.IsVerified -- form.IsVerified.Checked ....so it would have to have the smarts to find the control on the form, determine its type, and then load/unload between the domain object and the webform control into the proper property of the control. So if this worked, a person could just get rid of the cursed FormView control entirely, and it would be just one line of code each for binding and unbinding a webform. Possible?

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• Emacs recursive project search

  - by hekevintran

  I am switching to Emacs from TextMate. One feature of TextMate that I would really like to have in Emacs is the "Find in Project" search box that uses fuzzy matching. Emacs sort of has this with ido, but ido does not search recursively through child directories. It searches only within one directory. Is there a way to give ido a root directory and to search everything under it? Update: The questions below pertain to find-file-in-project.el from Michal Marczyk's answer. If anything in this message sounds obvious it's because I have used Emacs for less than one week. :-) As I understand it, project-local-variables lets me define things in a .emacs-project file that I keep in my project root. How do I point find-file-in-project to my project root? I am not familiar with regex syntax in Emacs Lisp. The default value for ffip-regexp is: ".*\\.\\(rb\\|js\\|css\\|yml\\|yaml\\|rhtml\\|erb\\|html\\|el\\)" I presume that I can just switch the extensions to the ones appropriate for my project. Could you explain the ffip-find-options? From the file: (defvar ffip-find-options "" "Extra options to pass to `find' when using find-file-in-project. Use this to exclude portions of your project: \"-not -regex \\".vendor.\\"\"") What does this mean exactly and how do I use it to exclude files/directories? Could you share an example .emacs-project file?

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• Error with ReportViewer in ASP.NET: "The server is not a compatible version" ?

  - by fritz

  I deployed some SSRS reports created in Visual Studio 2008 to localhost:8080/ReportServer. ( Using VS 2008 .NET , Version 9.0.21022.8, SQL Server 2008 and XP Prof.) Calling them in the Webbrowser works fine, but now I'm trying to use them in an ASP.NET app with ReportViewer in VS 2008 and using local ASP.NET Development Server. Excecuting the following Code: ReportViewer1.ProcessingMode = ProcessingMode.Remote; IReportServerCredentials irsc = new CustomReportCredentials("xxx", "xxx", "xxx"); ReportViewer1.ServerReport.ReportServerCredentials = irsc; ReportViewer1.ServerReport.ReportServerUrl = new Uri("http://localhost:8080/ReportServer/ReportService2005.asmx?wsdl"); ReportViewer1.ServerReport.ReportPath = @"/AdventureWorks Sample Reports/Sales Order Detail"; ReportViewer1.ServerReport.Refresh(); results in the following exception: "# The version of the report server web service definition (WSDL) is either not valid or unrecognized. The server is not a compatible version. * System.Web.Services.Protocols.SoapException: Server did not recognize the value of HTTP Header 'SOAPAction': http://schemas.microsoft.com/sqlserver/2005/06/30/reporting/reportingservices/LoadReport..." The report file .rdl contains the namespace: xmlns="http://schemas.microsoft.com/sqlserver/reporting/2008/01/reportdefinition" and "http://localhost:8080/ReportServer?&rs%3aCommand=ListChildren" in the Webbrowser shows the report directories and "Microsoft SQL Server Reporting Services, Version 10.0.1600.22" The file "ReportService2005.wsdl" contains a lot of "soapAction="http://schemas.microsoft.com/sqlserver/2005/06/30/reporting/reportingservices/..." attributes. So it sounds like a 2005 / 2008 incompability ? (but as mentioned: i'm using only 2008 products) Any ideas ?

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• Wpf Mvvm ComboBox

  - by 2Fast4YouBR

  Hi All, I am new in the Wpf world, so I created a couple of views and all of them have at least one ComboBox, as I am using the MvvM pattern, I get my self re-typing all the time the same line of codes to fill the Combo and to get the SelectedItem (creating properties, privates for fill and other to get). Is there some kind of framework that can improve this part ? or hack/trick ??? as I see too much repetitive code... maybe I am doing something wrong, take a look: XAML: <ComboBox name= "cbDepartments" DisplayMemberPath="DepartmentName" SelectedValuePath ="PrimaryKey" ItemsSource="{Binding Path=Departments}" SelectedItem="{Binding Path=DefaultBranch,Mode=TwoWay}" > ViewModel: private Department defaultBranch; public Department DefaultBranch { get { return this.defaultBranch; } set { if (this.defaultBranch != value) { this.defaultBranch = value; this.OnPropertyChanged("DefaultBranch"); this.saveChangeCommand.RaiseCanExecuteChanged(); this.UserMessage = string.Empty; } } } private ObservableCollection<Department> departments; public ObservableCollection<Department> Departments { get { return this.departments; } set { if (this. departments!= value) { this. departments = value; this.OnPropertyChanged("Departments"); } } }

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• Best way for a remote web app to authenticate users in my current web app?

  - by jklp

  So a bit of background, I'm working on an existing web application which has a set of users, who are able to log in via a traditional login screen with a user name and password, etc. Recently we've managed to score a client (who have their own Intranet site), who are wanting to be able to have their users log into their Intranet site, and then have their users click a link on their Intranet which redirects to our application and logs them into it automatically. I've had two suggestions on how to implement this so far: Create a URL which takes 2 parameters (which are "username" and "password") and have the Intranet site pass those parameters to us (our connection is via TLS so it's all encrypted). This would work fine, but it seems a little "hacky", and also means that the logins and passwords have to be the same on both systems (and having to write some kind of web service which can update the passwords for users - which also seems a bit insecure) Provide a token to the Intranet, so when the client clicks on a link on the Intranet, it sends the token to us, along with the user name (and no password) which means they're authenticated. Again, this sounds a bit hacky as isn't that essentially the same as providing everyone with the same password to log in? So to summarise, I'm after the following things: A way for the users who are already authenticated on the Intranet to log into our system without too much messing around, and without using an external system to authenticate, i.e. LDAP / Kerberos Something which isn't too specific to this client, and can easily be implemented by other Intranets to log in

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• Flex textarea control not updating properly.

  - by ielashi

  I am writing a flex application that involves modifying a textarea very frequently. I have encountered issues with the textarea sometimes not displaying my modifications. The following actionscript code illustrates my problem: <?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" minWidth="955" minHeight="600"> <mx:TextArea x="82" y="36" width="354" height="291" id="textArea" creationComplete="initApp()"/> <mx:Script> <![CDATA[ private var testSentence:String = "The big brown fox jumps over the lazy dog."; private var testCounter:int = 0; private function initApp():void { var timer:Timer = new Timer(10); timer.addEventListener(TimerEvent.TIMER, playSentence); timer.start(); } private function playSentence(event:TimerEvent):void { textArea.editable = false; if (testCounter == testSentence.length) { testCounter = 0; textArea.text += "\n"; } else { textArea.text += testSentence.charAt(testCounter++); } textArea.editable = true; } ]]> </mx:Script> </mx:Application> When you run the above code in a flex project, it should repeatedly print, character by character, the sentence "The big brown fox jumps over the lazy dog.". But, if you are typing into the textarea at the same time, you will notice the text the timer prints is distorted. I am really curious as to why this happens. The single-threaded nature of flex and disabling user input for the textarea when I make modifications should prevent this from happening, but for some reason this doesn't seem to be working. I must note too that, when running the timer at larger intervals (around 100ms) it seems to work perfectly, so I am tempted to think it's some kind of synchronization issue in the internals of the flex framework. Any ideas on what could be causing the problem?

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• linking to boost regex in gcc

  - by rboorgapally

  i am trying to compile my program which uses regex on linux. I built the boost library in the libs/regex/build by typing make -fgcc.mak which created a directory gcc which contains the following four files boost_regex-gcc-1_35 boost_regex-gcc-d-1_35 libboost_regex-gcc-1_35.a libboost_regex-gcc-d-1_35.a Now I want to use regex from my program which is in some arbitrary directory. I #included boost/regex.hpp I got the error which stated that regex.hpp is not found. Then I gave the -I option in the g++ compiler. I didn't get that error. But I get the following error undefined reference to `boost::re_detail::perl_matcher<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<boost::sub_match<__gnu_cxx::__normal_iterator<char const*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > >, boost::regex_traits<char, boost::cpp_regex_traits<char> > >::construct_init(boost::basic_regex<char, boost::regex_traits<char, boost::cpp_regex_traits<char> > > const&, boost::regex_constants::_match_flags)' I googled and found that I need to somehow link one of the above 4 libraries to my program. How can I do it. Which one should I link and why?

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• Cross domains sessions - shared shopping cart cross domains

  - by Jaroslav Moravec

  Hi, we are solving the problem with eshop (php, mysql). The client want to have the same eshop on two domains with shared shopping cart. In the shop customer can do the shopping without users account (can't be logged in). And there is the problem, how to make the shared shopping cart cross domain. The data from cart is stored in sessions, which we stored in database too. But we can't solve the problem in carrying data over domains. Identifying unlogged user is not holeproof (research). The example, how it should work Customer goes to domainOne and add some things to the cart. Than he goes to domainTwo (by link, typing domain address, however) and add some other things to the cart. In the cart he has things from both domains (after refreshing page). Do you have any idea, how to solve this problem? What didn't work: redirecting is not possible due to customer requirments cookies are related to domain set_cookie with the other domain didn't work the simpliest way is to carry over only the sessionid (stored in cookies) but we don't know, how to wholeproof identify unlogged users. is there any other place, where data can be stored on client side except cookies? (probably not) we can't use sending sessionid by params in url (if user click to link to the other domain) or resolving the header referer, bcs we don't know, how user can achieve the other domain. If you can't understand me, take me a question. If you think, that having eshop on two domains with shared (common) cart is bad idea, don't tell me, we know it. Thanks for each answer.

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• Equivalent of typedef in C#

  - by Matthew Scharley

  Is there a typedef equivalent in C#, or someway to get some sort of similar behaviour? I've done some googling, but everywhere I look seems to be negative. Currently I have a situation similar to the following: class GenericClass<T> { public event EventHandler<EventData> MyEvent; public class EventData : EventArgs { /* snip */ } // ... snip } Now, it doesn't take a rocket scientist to figure out that this can very quickly lead to alot of typing (appologies for the horrible pun) when trying to implement a handler for that event. It'd end up being something like this: GenericClass<int> gcInt = new GenericClass<int>; gcInt.MyEvent += new EventHandler<GenericClass<int>.EventData>(gcInt_MyEvent); // ... private void gcInt_MyEvent(object sender, GenericClass<int>.EventData e) { throw new NotImplementedException(); } Except, in my case, I was already using a complex type, not just an int. It'd be nice if it was possible to simplify this a little... Edit: ie. perhaps typedefing the EventHandler instead of needing to redefine it to get similar behaviour.

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• Horizontal menu vertical padding on anchor tag doesn't take affect

  - by Levi

  I am wondering why in the following example the top and bottom padding has no affect on the anchor tag while the left and right does? <ul id="nav"> <li><a href="#">One</a></li> <li><a href="#">Two</a></li> <li><a href="#">Three</a></li> <li><a href="#">Four</a></li> <li><a href="#">Five</a></li> </ul> #nav{ list-style:none; } #nav li{ border:1px solid #666; display:inline; /*If you do it this way you need to set the top and bottom padding to be the same here as under #nav li a padding:8px 0; */ } #nav li a{ padding:8px 16px; } Example: Link So my main question is, why does the top and bottom padding not have an effect on the list items while the left and right do? I did try this out with a float instead of a display:inline on the list item and it worked as I expected it to. So I guess if I had a secondary question it would be what is the difference between a float:left; and a display:inline? I was reading the float spec and it sounds like a float is still a box online inline so somewhat like inline-block? I appreciate any input, this isn't really something I need to know to finish a project or anything, but I would like to know why. Thanks Levi

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• How to publish an ASP.NET MVC website

  - by Luke Puplett

  Hello -- I've a site that I'd like to publish to a co-located live server. I'm finding this simple task quite hard. My problems begin with the Web Deploy tool (1.1) giving me a 401 Unauthorized as the adminstrator because port :8172 comes up in the errors and this port is blocked - but the documentation says "The default ListenURL is http://+:80/MsDeployAgentService"! I'm loathe to open another port and I've little patience these days so I thought bu66er it, I'll create a Web Deploy package and import it into IIS on the server over RDP. I notice first that Visual Studio doesn't use a dialog box to gather settings, or use my Publish profiles but seems to use a tab in the project properties, although I think these are ignored when importing the package anyway? I'm now sitting in the import wizard with Application Path and Connection String. I've cleared the conn string as I think this is for some ASP stuff I don't use but when I enter nothing in the Application Path, the wizard barks at me saying that basically I'm a weirdo because most people publish to folders beneath the root site. Now, I want my site to be site.com/Home/About and not site.com/subfolder/Home/About and I think being an MVC routed site that a subfolder will introduce other headaches. Should I go ahead and use the root? Finally, I also want to publish a web service to www.site.com/services/soap which I think IIS can handle. While typing this question, Amazon have delivered my IIS 7 Resource Kit, and I've been scouring the internet but actually I'm getting more confused. Comment here seems to show consensus opinion that Publish isn't for production sites and that real men roll their own. http://stackoverflow.com/questions/260525/asp-net-website-publish-vs-web-deployment-project ...I guess this was pre- Web Deployment Tool era? I'm going to experiment on a spare box for now but any assistance is welcome. Luke

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• Thread resource sharing

  - by David

  I'm struggling with multi-threaded programming... I have an application that talks to an external device via a CAN to USB module. I've got the application talking on the CAN bus just fine, but there is a requirement for the application to transmit a "heartbeat" message every second. This sounds like a perfect time to use threads, so I created a thread that wakes up every second and sends the heartbeat. The problem I'm having is sharing the CAN bus interface. The heartbeat must only be sent when the bus is idle. How do I share the resource? Here is pseudo code showing what I have so far: TMainThread { Init: CanBusApi =new TCanBusApi; MutexMain =CreateMutex( "CanBusApiMutexName" ); HeartbeatThread =new THeartbeatThread( CanBusApi ); Execution: WaitForSingleObject( MutexMain ); CanBusApi->DoSomething(); ReleaseMutex( MutexMain ); } THeartbeatThread( CanBusApi ) { Init: MutexHeart =CreateMutex( "CanBusApiMutexName" ); Execution: Sleep( 1000 ); WaitForSingleObject( MutexHeart ); CanBusApi->DoHeartBeat(); ReleaseMutex( MutexHeart ); } The problem I'm seeing is that when DoHeartBeat is called, it causes the main thread to block while waiting for MutexMain as expected, but DoHeartBeat also stops. DoHeartBeat doesn't complete until after WaitForSingleObject(MutexMain) times out in failure. Does DoHeartBeat execute in the context of the MainThread or HeartBeatThread? It seems to be executing in MainThread. What am I doing wrong? Is there a better way? Thanks, David

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• TinyMCE is glitchy in IE8

  - by Force Flow

  I'm using the jQuery version of TinyMCE 3.3.9.3 In firefox, it works fine (10 sec video depicting it in use): http://www.youtube.com/watch?v=TrAE0igfT3I In IE8 (in IE8 standards mode), I can't type or click any buttons. However, if I use ctrl+v to paste, then I can start typing, but the buttons still don't work (a 45 sec video depicting it in use): http://www.youtube.com/watch?v=iBSRlE8D8F4 The jQuery TinyMCE demo on TinyMCE's site works for me in IE8. Here's the init code: $().ready(function(){ function tinymce_focus(){ $('.defaultSkin table.mceLayout').css({'border-color' : '#6478D7'}); $('.defaultSkin table.mceLayout tr.mceFirst td').css({'border-top-color' : '#6478D7'}); $('.defaultSkin table.mceLayout tr.mceLast td').css({'border-bottom-color' : '#6478D7'}); } function tinymce_blur(){ $('.defaultSkin table.mceLayout').css({'border-color' : '#93a6e1'}); $('.defaultSkin table.mceLayout tr.mceFirst td').css({'border-top-color' : '#93a6e1'}); $('.defaultSkin table.mceLayout tr.mceLast td').css({'border-bottom-color' : '#93a6e1'}); } $('textarea.tinymce').tinymce({ script_url : 'JS/tinymce/tiny_mce.js', theme : "advanced", mode : "exact", theme : "advanced", invalid_elements : "b,i,iframe,font,input,textarea,select,button,form,fieldset,legend,script,noscript,object,embed,table,img,a,h1,h2,h3,h4,h5,h6", //theme options theme_advanced_buttons1 : "cut,copy,paste,pastetext,pasteword,selectall,|,undo,redo,|,cleanup,removeformat,|", theme_advanced_buttons2 : "bold,italic,underline,|,bullist,numlist,|,forecolor,backcolor,|", theme_advanced_buttons3 : "", theme_advanced_buttons4 : "", theme_advanced_toolbar_location : "top", theme_advanced_toolbar_align : "left", theme_advanced_statusbar_location : "none", theme_advanced_resizing : false, //plugins plugins : "inlinepopups,paste", dialog_type : "modal", paste_auto_cleanup_on_paste : true, setup: function(ed){ ed.onInit.add(function(ed){ //check for addEventListener -- primarily supported by firefox only var edDoc = ed.getDoc(); if ("addEventListener" in edDoc){ edDoc.addEventListener("focus", function(){ tinymce_focus(); }, false); edDoc.addEventListener("blur", function(){ tinymce_blur(); }, false); } }); } }); }); Any ideas as to why it's not working in IE8?

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• Decisions in teaching someone else to program: language selection

  - by Dinah

  My friend would like for me to guide her into learning programming. She's already proven enormous aptitude for thinking like a programmer but is scared of the idea of programming since in her mind it's relegated to some magical realm accessible only to smart people and trained computer scientists (ironically, I am neither but that's beside the point). My main question is the age-old and irritating question: which language should I chose? I've limited it down to these: PHP: dead simple to start with and I remember enough of the language to answer all novice questions. However, I can think of a million reasons why I wouldn't recommend this as a first language. The most diplomatic of which is that there's no desktop app option to which I would feel comfortable subjecting a novice. Python: supposed to be wonderful for beginners and generally everything I've heard about it screams that this is the correct choice. That's the problem: everything I've heard about it. I don't know it yet and have a lot of projects going on right now so I don't feel like learning it yet -- but I'm going to be the tech-support when any little thing goes wrong. I know there are tons of online resources but in the frustration of the moment, it's always going to be just me. C#: this is the language I'm most comfortable with so I know I can be good tech support. I also love this language and its versatility and community. The big drawback here is that I remember when I first learned it after doing mainly PHP, Perl, and JavaScript and I found the experience overwhelming. You are simultaneously learning: programming concepts, C# syntax, strong typing, OOP, and a complex powerful IDE with a bazillion options and buttons all over it.

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• WPF: Animation Only Runs Once

  - by Phil Sandler

  Very basic (I think) animation question. My animation only runs the first time "MyProp" gets set to false. If it gets set a second time, the animation doesn't run. I know my data trigger is getting hit, as the sound DOES play. The effect I want is for the animation to run, then reset the target property back to what it was before the animation occurred (thus the FillBehavior=Stop). Do I need to reset the animation after it plays? <DataTrigger Binding="{Binding MyProp}" Value="False"> <DataTrigger.EnterActions> <SoundPlayerAction Source="/Resources/Sounds/Ding.wav"/> <BeginStoryboard> <Storyboard BeginTime="00:00:00" Duration="0:0:2" Storyboard.TargetProperty="(Background).(SolidColorBrush.Color)"> <ColorAnimation FillBehavior="Stop" From="Black" To="Red" Duration="0:0:0.5" AutoReverse="True"/> </Storyboard> </BeginStoryboard> </DataTrigger.EnterActions> </DataTrigger>

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• Consume webservice from a .NET DLL - app.config problem

  - by Asaf R

  Hi, I'm building a DLL, let's call it mydll.dll, and in it I sometimes need to call methods from webservice, myservice. mydll.dll is built using C# and .NET 3.5. To consume myservice from mydll I've Added A Service in Visual Studio 2008, which is more or less the same as using svcutil.exe. Doing so creates a class I can create, and adds endpoint and bindings configurations to mydll app.config. The problem here is that mydll app.config is never loaded. Instead, what's loaded is the app.config or web.config of the program I use mydll in. I expect mydll to evolve, which is why I've decoupled it's funcionality from the rest of my system to begin with. During that evolution it will likely add more webservice to which it'll call, ruling out manual copy-paste ways to overcome this problem. I've looked at several possible approaches to attacking this issue: Manually copy endpoints and bindings from mydell app.config to target EXE or web .config file. Couples the modules, not flexible Include endpoints and bindings from mydll app.config in target .config, using configSource (see here). Also add coupling between modules Programmatically load mydll app.config, read endpoints and bindings, and instantiate Binding and EndpointAddress. Use a different tool to create local frontend for myservice I'm not sure which way to go. Option 3 sounds promising, but as it turns out it's a lot of work and will probably introduce several bugs, so it doubtfully pays off. I'm also not familiar with any tool other than the canonical svcutil.exe. Please either give pros and cons for the above alternative, provide tips for implementing any of them, or suggest other approaches. Thanks, Asaf

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• how could installations/configurations be easier in linux?

  - by ajsie

  although you can do anything in linux it tends to require a lot of tweaking in config files and reading a lot of manuals/tutorials before you can have it running in your way. i know that it gets a lot easier by time, and the apt-get installations with ubuntu/debian is heading the right way. but how can linux be more userfriendly for us in the future? i thought that if more is automated like an IDE environment, eg. typing svn will give us all the commands and description about each command when you move between commands with your keyboard. that would be great. but that's just one example. another is the navigation in the terminal between folders. now you have to type a lot just to jump from/to different folders. would be great with some more automatization here too. i know that these extra features will slow down the server, but its 2010 now, and these features are not that heavy for the cpu, but makes it more userfriendly and encourage maintainance of a server, not frighten u off. what do you think about this? should/could we have more user friendly linux environment in servers, something that has annoyed you a lot? a lot of things are done in the unix way, but maybe we should reinvent the wheel in some areas, cause apparently, its so...repeatingly today and difficult to do easy tasks. it should be easier i think..

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• Does RabbitMq do round-robin from the exchange to the queues

  - by Lancelot

  Hi, I am currently evaluating message queue systems and RabbitMq seems like a good candidate, so I'm digging a little more into it. To give a little context I'm looking to have something like one exchange load balancing the message publishing to multiple queues. I don't want to replicate the messages, so a fanout exchange is not an option. Also the reason I'm thinking of having multiple queues vs one queue handling the round-robin w/ the consumers, is that I don't want our single point of failure to be at the queue level. Sounds like I could add some logic on the publisher side to simulate that behavior by editing the routing key and having the appropriate bindings in place. But that's kind of a passive approach that wouldn't take the pace of the message consumption on each queue into account, potentially leading to fill up one queue if the consumer applications for that queue are dead. I was looking for a more pro-active way from the exchange entity side, that would decide where to send the next message based on each queue size or something of that nature. I read about Alice and the available RESTful APIs but that seems kind of a heavy duty solution to implement fast routing decisions. Anyone knows if round-robin between the exchange the queues is feasible w/ RabbitMQ then? Thanks.

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• UItextfield text alignment issue in cocos2D iPhone

  - by shreya

  Hi All, Please take a look of the following screen shot. Here is my code, I am using cocos2D CGAffineTransform transform = CGAffineTransformMakeRotation(3.14159/2); _view = [[CCDirector sharedDirector]openGLView]; // Input the user name _nameField = [[UITextField alloc]initWithFrame:CGRectMake(130.0, 270.0, 200.0, 30.0)]; _nameField.transform = transform; _nameField.adjustsFontSizeToFitWidth = YES; _nameField.textColor = [UIColor blackColor]; [_nameField setFont:[UIFont fontWithName:@"Arial" size:14]]; _nameField.placeholder = @"<Enter Your Name>"; _nameField.backgroundColor = [UIColor clearColor]; _nameField.autocorrectionType = UITextAutocorrectionTypeNo; _nameField.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters; _nameField.textAlignment = UITextAlignmentCenter; _nameField.keyboardType = UIKeyboardTypeDefault; _nameField.returnKeyType = UIReturnKeyDone; _nameField.tag = 0; _nameField.delegate = self; _nameField.clearButtonMode = UITextFieldViewModeNever; _nameField.borderStyle = UITextBorderStyleRoundedRect; [_view addSubview:_nameField]; The problem is the text is typing on the top of the text field. I want it to be in the middle not to top.

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• Google Map GEO Results

  - by Lee

  Hey All I'm getting really frustrated with google geo results and hope someone can advise me the best was to go. I have created a AutoSuggest feature where you can start typing the address and google will repspond with suggestions. User then selects and address to move on. But before I want them to continue on the next page I want to validate their selection. I would have thought this will be easy as we are only checking against what google has already given. But when I do my validation lookup it displays no results. Some example code: Lets say I picked from the suggestion this address: Suffield, CT 06078, USA Then on validation I do a second lookup with this address ie. $string = "Suffield, CT 06078, USA"; echo 'http://maps.google.com/maps/geo?output=json&oe=utf8&gl=us&sensor=false&key=[MyKey]&q='.urlencode($string).''; It gives me Error code 602 (G_GEO_UNKNOWN_ADDRESS) How can it not be found when its given me the address ?? Any suggestions how I can get around this. Hope you can !

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• Why is "Fixup" needed for Persistence Ignorant POCO's in EF 4?

  - by Eric J.

  One of the much-anticipated features of Entity Framework 4 is the ability to use POCO (Plain Old CLR Objects) in a Persistence Ignorant manner (i.e. they don't "know" that they are being persisted with Entity Framework vs. some other mechanism). I'm trying to wrap my head around why it's necessary to perform association fixups and use FixupCollection in my "plain" business object. That requirement seems to imply that the business object can't be completely ignorant of the persistence mechanism after all (in fact the word "fixup" sounds like something needs to be fixed/altered to work with the chosen persistence mechanism). Specifically I'm referring to the Association Fixup region that's generated by the ADO.NET POCO Entity Generator, e.g.: #region Association Fixup private void FixupImportFile(ImportFile previousValue) { if (previousValue != null && previousValue.Participants.Contains(this)) { previousValue.Participants.Remove(this); } if (ImportFile != null) { if (!ImportFile.Participants.Contains(this)) { ImportFile.Participants.Add(this); } if (ImportFileId != ImportFile.Id) { ImportFileId = ImportFile.Id; } } } #endregion as well as the use of FixupCollection. Other common persistence-ignorant ORMs don't have similar restrictions. Is this due to fundamental design decisions in EF? Is some level of non-ignorance here to stay even in later versions of EF? Is there a clever way to hide this persistence dependency from the POCO developer? How does this work out in practice, end-to-end? For example, I understand support was only recently added for ObservableCollection (which is needed for Silverlight and WPF). Are there gotchas in other software layers from the design requirements of EF-compatible POCO objects?

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• jquery ui autocomplete problem

  - by Roger

  Hi, i've got a select box containing countries, and when one is selected, i want my autocomplete data for the city field to load via ajax. here's my code: // Sets up the autocompleter depending on the currently // selected country $(document).ready(function() { var cache = getCities(); $('#registration_city_id').autocomplete( { source: cache } ); cache = getCities(); // update the cache array when a different country is selected $("#registration_country_id").change(function() { cache = getCities(); }); }); /** * Gets the cities associated with the currently selected country */ function getCities() { var cityId = $("#registration_country_id :selected").attr('value'); return $.getJSON("/ajax/cities/" + cityId + ".html"); } This returns the following json: ["Aberdare","Aberdeen","Aberystwyth","Abingdon","Accrington","Airdrie","Aldershot","Alfreton","Alloa","Altrincham","Amersham","Andover","Antrim","Arbroath","Ardrossan","Arnold","Ashford","Ashington","Ashton-under-Lyne","Atherton","Aylesbury","Ayr",... ] But, it doesn't work. When i start typing in the city box, the style changes so the autocompleter is doing something, but it won't display this data. If i hard-code the above it works. Can anyone see what's wrong? Thanks

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• AS3 Working With Arbitrarily Large Files

  - by Kekoa

  I am trying to read a very large file in AS3 and am having problems with the runtime just crashing on me. I'm currently using a FileStream to open the file asynchronously. This does not work(crashes without an Exception) for files bigger than about 300MB. _fileStream = new FileStream(); _fileStream.addEventListener(IOErrorEvent.IO_ERROR, loadError); _fileStream.addEventListener(Event.COMPLETE, loadComplete); _fileStream.openAsync(myFile, FileMode.READ); In looking at the documentation, it sounds like the FileStream class still tries to read in the entire file to memory(which is bad for large files). Is there a more suitable class to use for reading large files? I really would like something like a buffered FileStream class that only loads the bytes from the files that are going to be read next. I'm expecting that I may need to write a class that does this for me, but then I would need to read only a piece of a file at a time. I'm assuming that I can do this by setting the position and readAhead properties of the FileStream to read a chunk out of a file at a time. I would love to save some time if there is a class like this that already exists. Is there a good way to process large files in AS3, without loading entire contents into memory?

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• Best cubicle toys for programming

  - by dlamblin

  I need some employee/co-worker Christmas gift ideas. Do you have any good cubicle toys that help you to do any of: think about programming problems solve programming problems by representing common abstractions can be directly programmed can interface with a PC based IDE to be programmed. it may present problems that can be solved, to kick start problem solving. Disallowed items are: reference material in book, pamphlet, poster or cheat-sheet form, even if it has kick ass pop-cultural references. edibles. [discuss separately] things that need their own lab-space and/or extensive tools to be worked with. So yes, Lego Mindstorms come to mind, but they aren't cubicle toys because they cost more than cubicle toys would, and they have too many losable parts. comments on the answers so far: The 20 Questions game sounds quite neat as it could get you thinking; The bean balls could be used as tokens in a problem, so I can see that working. The magnetic toys like ball of whacks or the ball-and-stick ones present hands on fun of a structural nature... now can there be a similar hands on fun toy that aids in representing a solution to a problem? The Gui Mags clearly could, but they're quite utility oriented. The AVR Butterfly is less of a toy but definitely priced attractively, cheaper and more responsive than a basic stamp. I'm not going to pick an answer; there's several great suggestions here. Thank you.

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