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• Real time web services

  - by daliz

  Hi everybody, I have a little (maybe the answer could require a book) question about web services and server side programming. But first, a little preamble. Recently we have seen new kind of applications & games using some kind of real-time interaction with a database, or more generally, with other users. I'm talking about shared drawing canvas, games like this , or simple chats, or the Android app "a World of Photo", where in real time you see who is online, to share your photos, etc. Now my question: Are all these apps based on classic TCP client/server architectures or is there a way to make them in a simpler way, like a web platform like LAMP? What I'm asking, in other words is: Can PHP+MySQL (or JSP, or RoR, or any other server language) provide a way to make online users communicate in real time and share data? Is there a way to do that without the ugly and heavy mechanism of temporary tables? Thank you! I hope I've been clear.

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• Retrieving JSON from a web URL

  - by npeterson

  This may be a terribly uninformed question, brace yourself. A company I'm working with has given an 'API' that I can use to access orders, however, there are only two real commands, getorders and getorderdetails. These commands are put in the format of http://www.server.com/path/to/the/orderapi/getorders/UniqueKey/ If I go to that web address, I'm prompted for a username and password, and once authenticating, get presented with a page of JSON formatted order details, contained in the body of the html page. I would like a service to check this information and create orders in our crm based on it, is there an obvious way to access it without the browser/client interaction?

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• How do I draw a proper parallelogram that can be animated on iPhone?

  - by Robert Kosara

  I'm trying to do something very simple: I need some parallelograms in my program. These are attached to other objects, all of which are UIViews. It's important that I be able to animate these, since the objects they are attached to can also be animated. I've figured out how to use the transform in UIView/CALayer to do this, but the problem is that these sheared UIViews don't look very nice: there is no anti-aliasing of the edges. Is there some other way to do this? I would like to use UIViews, since I also use them for user interaction and animation is so much easier than drawing by hand. I don't want to use OpenGL for this.

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• Is Oracle AQ/Streams of any use in my situation?

  - by RenderIn

  I'm writing a workflow system that is driven entirely at each step by explicit human interaction. That is, a task is assigned to a person, that person selects from a few limited options {approve, reject, forward}, and then it is either sent along to the next person or terminated. Just curious of Oracle Streams/AQ has anything to offer over flat tables managed by regular web application code. The amount of processing after each action is fairly limited and the volume is not terribly high, so there's not really a need to throttle things by throwing them into a queue. What are some of the benefits of introducing a queue structure, or is it overkill for my situation?

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• onclick event from XML Nodes

  - by user256007

  My Documents are a mixture of XML and HTML Tags. where HTML tags are pulled from xhtml namespace and mine are from various namspaces. I wanna take user interaction events from XML Nodes of my Document. I First tried <do:landingTime xhtml:onclick="fnc">20:48:29.45</do:landingTime> with no Luck. But <xhtml:span onclick="fnc"> works. So is there any solution/tricks/hacks/backdoor to take events from my xml Nodes.

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• How does rolling back an application level transaction interact with SqlDataAdapter events in ADO.NE

  - by ilasno

  When utilizing the RowUpdated event in the SqlAdapter class, i'm assuming that it is raised directly following the return of the database interaction that executes the update. If that update is part of an application level transaction (utilizing the SqlTransaction class) which is then rolled back, does this affect or interact at all with the RowUpdated event? Or is the RowUpdated event not raised until after the transaction is committed (this seems unlikely, but i couldn't find documentation)? If RowUpdated has already been raised, and then the transaction is rolled back, any good ideas on how to adjust something that may have been done in RowUpdated that should then, also be rolled back?

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• what great software engineers know or aspiring ones should know?

  - by trojanwarrior3000

  I do not mean any particular language or methodology. But basics( one have abstracted from ones experience and interaction with smarter people in this field) one should have including concepts, practical issues, tips/techniques/tricks one should be aware of.For example the lessons or ideas may relate to programming,testing,design,project schedules, that are really useful in daily life of software engineer/developer etc ? This may be a good question because it looks not to specific, however experience of many is better than reading from books.I find discussions much helpful than books.Hope every one will have some lessons/ideas to contribute.please substantiate with atleast one example.

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• Making vim git aware.

  - by anon

  I use Vim & Git together. I tend to merge/switch Git branches alot. I tend to have lots of vim buffers open. Is there a way to tell vim: when I execute this git command (which switches branches), reload all buffers? Since I have hooks into all my vim-git interaction, letting vim know when to do the reload is not a problem. The question is: how to force vim to reload all buffers?

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• VB.Net: How to fill in a form in a website, then click at a button and download the file using webbr

  - by BasisBit

  I am using a WebBrowser-Control to fill in a webform and then click at a button, this currently results in a standard Download File Dialog (you get these if you download a file using internet explorer), but instead, I have to catch this file and save it automatically with a by me defined name to a specific folder. I am trying to code a little application in vb.net which download the Export-file from my wordpress-blog, and I want to do this completely without user-interaction. Currently everything works, except the downloading of the file. I tried to catch it with the event System.Windows.Controls.WebBrowser.Navigating(ByVal Object, ByVal System.Windows.Navigation.NavigatingCancelEventArgs) but I don't see where to download the file from :( I hope you guys can help me.

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• Is there a way to tell JVM to optimize my code before processing?

  - by Rogach

  I have a method, which takes much time to execute first time. But after several invocations, it takes about 30 times less time. So, to make my application respond to user interaction faster, I "warm-up" this method (5 times) with some sample data on initialization of application. But this increases app start-up time. I read, that JVM's can optimize and compile my java code to native, thus speeding things up. I wanted to know - maybe there is some way to explicitly tell JVM that I want this method to be compiled on startup of application?

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• Custom View - Avoid redrawing when non-interactive

  - by MasterGaurav

  I have a complex custom view - photo collage. What is observed is whenever any UI interaction happens, the view is redrawn. How can I avoid complete redrawing (for example, use a cached UI) of the view specially when I click the "back" button to go back to previous activity because that also causes redrawing of the view. While exploring the API and web, I found a method - getDrawingCache() - but don't know how to use it effectively. How do I use it effectively? I've had other issues with Custom Views that I outline here.

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• Avoiding display of Visual Studio Debugger when starting a new process from within java.exe

  - by Matt Sheppard

  How can I, from within a java program on windows, prevent a debugger window being displayed if a program I invoke crashes, and how can I detect the fact that it has crashed? Background I have a problem with a java application running on Windows which is launching an unreliable third party program by way of ProcessBuilder.start(). Specifically, if the external program crashes, the 'Visual Studio Just-In-time Debugger' window pops up asking if the user wants to debug the program. From the java application side, I'm happy to deal with the fact that under some circumstances, the third party program will crash, but I'd like to be able to detect and silently handle that situation from within the Java code without requiring any user interaction.

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• Proper way to setup a UISegmentedControll on UINavigationController UINavigationBar all inside UITab

  - by Kaspa

  The title pretty much describes it all. The problem being the handling of the UISegmentedControll callbacks (button presses). If the content type of all of the nested views was the same (i.e. some UITableViewControllers) then I could just switch dataSource'es and reload the tables. However this is not the case, I have 3 very different views in there that allow further drilldown / interaction based on the NavigationControllers. So the way I have this set up ATM is that there is a "container" class that I put all of the UINavigationControllers in. They all share the same and one UISegmentedController and I redirect the callbacks to the container view controller. This does not feel too good at all. Additionally there is a problem when the user taps on the tab bar icon, the navigation controller pops to root which is ... the empty container view. Here's a picture of what I want to achieve:

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• What open source database platform is most easily transferred from my personal machine into a window

  - by Tom

  I would like eventual interaction with MS Dynamics SL and/or MindTouch Core (running on WMware) for eventual intranet and/or internet display. I guess I am asking for front and back end recommendations for a database I am constructing, but since this is my first major project I would greatly appreciate any help and advice. I would also love an opportunity to learn a new language so the code base could be in any language. I do have a few more related questions for discussion; What is the viability of using Google hosting to provide the service to the public for free? Should I implement plone or another CMS if I have a large amount of output? Is there a structuring questionnaire or standards publication I could reference? Does UML diagramming provide additional options for portability? Thank you.

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• DragDrop registration did not succeed in Setup Project

  - by rodnower

  Hello, we have some installation project in Visual Studio solution (Other project types - Setup and deployment - Setup project). This project have other library type project with Installation class named InstallationCore like project output. In user action I call to Install and Uninstall functions of installer of InstallationCore. InstallationCore has windows forms for interaction with user. There, in forms, I use Drag and Drop functionality for Drag and Drop text from Tree View to Text Box. But in line: txbUserName.AllowDrop = true; I get error of JIT debugger: Unhandled exception has occured DragDrop registration did not succeed System.InvalidOperationException: DragDrop registration did not succeed And long stack trace after that. Important to say, that when I run Installer function from test project the error did not occur and all work fine. Error occurs only when I run the .msi package. Any suggestions? Thank you for ahead.

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• DWR and Jquery into spring MVC 2.5

  - by Mark Estrada

  Hi, From my shallow reading, Spring MVC does not support jquery directly. It does enable integration with DWR framework. From my understanding of DWR, it is an ajax framework that allows you to call javas methods from javascript. Can I use both in my application? With Jquery handling most of the javascript code and client side interaction and DWR making the ajax calls? I am leaning towards learning jquery but there is no out of the box support for it in spring 2.5.

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• Django, javascript and code reuse problem

  - by dragoon

  Hi, I have some sort of a design problem with my Django AJAX application. I have a template where I initialize js variable from django context variable like so: var test = "{{ test }}"; This variable is than used in a number of js functions that are needed for interface to work properly. So now I'm trying to reuse some content from this page in another page that loads it dynamically on some user interaction using jQuery.load(..), and I don't see any way how I can initialize that variable, so js functions don't work now. Is there any solution for this or may be I'm doing it wrong? Thanks.

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• Change input text to regular text on blur and ability to edit jQuery

  - by eknown

  I'm creating a form where I'm eliminating the use of a save button. The form is made up of input text boxes and textareas. After the user enters data into the input field, I want to trigger an onBlur function and change the input into a span that contains the information that the user entered. I also want to have the ability to edit this information, so if the user clicks on the newly created span with text, it will turn back into the input field with the current information for their editing pleasure. For reference, I'm looking to have a functionality pretty much like on editing a photo title on Flickr. If possible, I'd also like to have the textbox show "saving..." for half a second after the blur to reflect interaction with server.

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• Is there anJoomla extensions that works like Yahoo! Groups??

  - by Dion

  Hello all, Can anybody suggests me any extensions for Joomla that works like Yahoo!Groups?? I needed an extensions that : 1. If i post a new subject, everybody on the subscription list get that new subject/article/post on their e-mail. 2. The subscriber/receiver of that mail, can reply it directly from their e-mail (yahoo, gmail, outlook, etc)...and, their reply shows on the website front end. Basically, like Yahoo! Groups did... I've tried "Acajoom", and "Ultimate Mailing List"....both worked great for creating a newsletter, subscription, and sending mail to all the subscriber. But i cannot reply the e-mail and showed the reply on the website, and the other receiver didn;t receive it too...so there is absolutely no interaction within the mailing list. If anyone can suggest me something, i will be very grateful Thanx!!

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• Drag and Drop to explorer causing invalid FORMATETC (DV_E_FORMATETC) error

  - by JustABill

  I'm trying to use this excellent example to implement dropping virtual files into Windows Explorer. However, I'm stymied by this error. Towards the bottom, inside void System.Runtime.InteropServices.ComTypes.IDataObject.GetData(ref System.Runtime.InteropServices.ComTypes.FORMATETC formatetc, out System.Runtime.InteropServices.ComTypes.STGMEDIUM medium) on the first call to ((System.Runtime.InteropServices.ComTypes.IDataObject)this).GetDataHere(ref formatetc, ref medium); I'm getting back a DV_E_FORMATETC error. As far as I can tell, all the elements of the FORMATETC struct that are being passed in are valid: cfFormat is "Shell IDList Array" (-16141), ptd is 0, dwAspect is DVASPECT_CONTENT, lindex is -1, and tymed is TYMED_HGLOBAL. I'm kind of confused how there'd be a problem anyway, since this was generated by explorer. I know very little about COM interaction, so any help would be greatly appreciated.

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• In-memory Database in Excel

  - by user329174

  Hello, I am looking for a way to import a datatable from Access into an Excel variable and then run queries through this variable to speed up the process. I am trying to migrate from C# .NET where I read a data table from an access database into memory and then used LINQ to query this dataset. It is MUCH faster than how I have it currently coded in VBA where I must make lots of calls to the actual database, which is slow. I have seen the QueryTable mentioned, but it appears that this requires pasting the data into the excel sheet. I would like to keep everything in memory and minimize the interaction between the Excel Sheet and the VBA code as much as possible. I wish we didn't need to use Excel+VBA to do this, but we're kind of stuck with that for now. Thanks for the help!

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• ASP.Net AJAX controls, adding via .ashx page

  - by Matt Dawdy

  Okay, this is a continuation of a previous question of mine, but it is distinct enough to be its own question. Based on user interaction, I'm calling a .ashx handler via a jquery ajax call, and that handler is building some html for me that includes some Telerik controls like a masked textbox (masked for a phone number like "(###) ###-####". I got around all the hurdles of using Render() to get the html output of a server control even when it doesn't have a "Page" object or a ScriptHandler object. However, when I show the control to a user, I see the mask in the text of the textbox, but the mask doesn't "work" in the sense that when a user starts typing, it is as if the mask is really just text. So, my question is, after putting the html code out for a masked textbox, how do I tell whatever javascript is supposed to mask the input to really start masking on that specific control? I really hope this made sense. Please tell me if you need any clarification.

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• How can I get jQuery UI's Draggable and Sortable functions to work on the iPhone?

  - by Damovisa

  I have a page that uses JQuery UI; in particular the Sortable interaction. The page works fine for desktop web browsers with mice, however I can't get the drag-drop functionality to work on Mobile Safari on the iPhone. Any dragging action simply scrolls the page. The functionality on my page is extremely similar to the Sortable Empty-Lists demo on the JQuery UI site. This page also doesn't work on the iPhone. Is there any way to get the drag-drop functions working on the iPhone?

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• Polling versus socket servers for online Flash games

  - by justin

  Hi, I want to make an online flash game, it will have social features but the gameplay will be primarily single-player. For example, no two players will appear on the screen at once, the social interaction will be through asynchronous messages, there won't be real-time chat or anything. Much of the logic would happen in the client, the server would validate the client logic, but it wouldn't need to be totally synchronous, which is why I'm thinking polling might be satisfactory. I have read in many places that socket servers can be more efficient than using polling for online games, but is that mainly a consideration for games that are more multi-player with more mult-player interactions than the game I have descriebed? If many users are playing online at the same time, but each playing a relatively isolated game, and not interacting to in real-time with each players, could polling be okay, or would using sockets be advisable no matter what if you have an online game that you envision many people playing at the same time? Thanks!

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• handle user logoff or machine shutdown requests on WindowsME

  - by skylap

  I have to write a C# application that runs on WindowsME. Yes, I mean that Microsoft operating system that has been forgotten a long long time ago. My program needs no user interaction and as WindowsME doesn't support services, it will be a console application. Furthermore it will be used on more modern operating systems, where the user can choose whether to start it as console application or install it as a windows service. Now suppose the software is running on WinME and the user decides to logoff or shutdown the machine without a prior quit of my software. WinME complains about my program still running and asks if it should kill the process. Apart from the bad user experiance, this means that the application is not shut down properly. So I look for a way to be informed if the user logs off or wants to shutdown the machine to be able to perform a proper shutdown of my software first.

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