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• iPhone Objective-C/Plain C Memory Management

  - by toc777

  Hi everyone, I understand Objective-C memory management but I'm using Core Graphics functionality such as CGRect, CGPoint, CGImageRef etc.. which is written in plain C. My question is how do i manage this memory or is it already handled for me? According to the Apple documentation if an Apple Objective-C function doesn't have copy, new or create in it the returned object is managed for you using autorealease. Is this true for the Core Graphics stuff also? (Well i guess it wont be using autorealease but maybe something similar?) Thanks for taking the time to read this.

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• Rails transaction: save data in multiple models.

  - by smotchkkiss

  my models class Auction belongs_to :item belongs_to :user, :foreign_key => :current_winner_id has_many :auction_bids end class User has_many :auction_bids end class AuctionBid belongs_to :user end current usage An item is displayed on the page, the user enters an amount and clicks bid. Controller code might look something like this: class MyController def bid @ab = AuctionBid.new(params[:auction_bid]) @ab.user = current_user if @ab.save render :json => {:response => 'YAY!'} else render :json => {:response => 'FAIL!'} end end end desired functionality This works great so far! However, I need to ensure a couple other things happen. @ab.auction.bid_count needs to be incremented by one. @ab.user.bid_count needs to be incremented by one @ab.auction.current_winner_id needs to be set to @ab.user_id That is, the User and the Auction associated with the AuctionBid need values updated as well in order for the AuctionBid#save to return true.

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• Mysql results sorted by list which is unique for each user

  - by ADAM

  Ive got a table of thousands of products and 50 or so authenticated users. These users all show the products on their own web sites and they all require the ability to have them ordered differently. Im guesing i need some kind of seperate table for the orders which contains the product_id, user_id and order column? How do i do this the most efficiently in mysql so as to be very fast, and not slow down if i get millions of products in the database. Is it even wise to do it in mysql or should i be using some kind of other index like solr/lucene? My Product table is called "products" My User table is called "users" A good example of the functionality i need is google search where you can order/supress the results if you are logged in. edit: the product results will be paginated and the users have the authority to edit the products, so its not just ready only

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• How to log python exception ?

  - by Maxim Veksler

  Hi, Coming from java, being familiar with logback I used to do try { ... catch (Exception e) { log("Error at X", e); } I would like the same functionality of being able to log the exception and the stacktrace into a file. How would you recommend me implementing this? Currently using boto logging infrastructre, boto.log.info(...) I've looked at some options and found out I can access the actual exception details using this code: import sys try: 1/0 except: exc_type, exc_value, exc_traceback = sys.exc_info() traceback.print_exception(exc_type, exc_value, exc_traceback) I would like to somehow get the string print_exception() throws to stdout so that I can log it. Thank you, Maxim.

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• Background search for changes in TFS source control

  - by qntmfred

  SourceGear Vault's client app has the ability to background search for changes. This is very useful because at any time I can take a quick peek and see what changes my team members have checked in and that I need to get latest on. This is also helpful for previewing any merges that might be necessary. And on a day to day basis, it helps me get a sense of what parts of the codebase are seeing the most churn. Is there a way to get this same functionality with Team Foundation Server, either with native features or a plugin? I know there is a Compare feature, but it takes way too long to be useful. Unless it could periodically refresh itself like Vault does, but I haven't found a way to do that. Anything new with Visual Studio 2010?

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• How to set up 3rd party developer portal

  - by Michael

  I am developing a web service and depend on 3rd party developers to write client applications for it. I need to set a developer portal, a web site where existing and potential developers would find documentation html pages doc files for download libraries downloads wiki forums support ticketing system. There should be a public part and a part protected by login. I want only logged in users to submit tickets, for example. I don't want to host it. I would prefer a generic design based on a sensible template, where I can add minimal customization, such as logo. I don't want to add code to get any of the above functionality. I will do all that if necessary, but I'd hope there would be an online service to do thing like that. What services would you guys recommend?

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• How can i get Simple Plain Text from WMD Editor?

  - by stackuser1

  I'm able to get Markdown and html formated text from WMD editor. In my requirement i also need to get plain text from WMD Editor. I would like to explain a simple example. In StackOverflow we will see markdown text while typing description in wmd editor, in preview we are able to see the formated text. In Question Page, with out this markdown and formated text we are able to see the question description in two lines. I need to achieve same kind of functionality. Please suggest me what i need to do.

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• How to get IzPack tocheck for an existing version of the software?

  - by bguiz

  Hi, I have an application for which we use IzPack to create the installer. The installer is working fine in its current state, however, I need to add functionality that enables it to check whether an existing version of the software has been installed. I understand IzPack supports this out of the box using its CheckedHelloPanel, unfortunately that only works for Windows, as it appears to depend on the windows registry. Is there a way to configure IzPack such that it is able to detect existing installations? I need to be able to detect whether there is one and merely display a message notifying the user... Bonus points for how to give the user the option to trigger the uninstaller of the existing installation. Assume that the software will only be installed using the new installer IzPack only: please do not suggest alternatives, as we cannot change that now If you suggest using <validator>, please include a code sample of the validator class, because I have considered this, but don't know where to start

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• null object reference in ScrollPane/endDrag() when scrollDrag=true

  - by SP

  Hello there. In my flash application, I've got multiple windows which use Scrollpanes. The scrollDrag property is set to true on these because I want that functionality. If I close (within my application) one of these 'windows' and open another, I seem to get a whole lot of this error showing up in my logs: TypeError: Error #1009: Cannot access a property or method of a null object reference. at fl.containers::ScrollPane/endDrag() Sometimes I get thousands of these, which I'm guessing is probably slowing my app down a bit, but otherwise is not causing a problem. Looking through the adobe code for scrollpane, endDrag is really simple: protected function endDrag(event:MouseEvent):void { stage.removeEventListener(MouseEvent.MOUSE_MOVE, doDrag); } The stage var is the only thing that could be null here. The only thing I can think to do is set scrollDrag=false before the window in my application closes so that nothing is listening for the event. Any other suggestions?

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• Easiest way to create twitter-like status update widget

  - by culov

  I want a widget that allows users to add a request if that request hasnt already been added, or vote for a request if it has already been added. when a user adds a request, i want it to immediately appear as the first element of the list, like what would happen to your timeline if you made new tweet. ive tried to look for a jquery plugin that offers this functionality, but i was unsuccessful (maybe i couldnt think of the right terms to search for??). i dont have enough faith in my js skills to write this from scratch, so id rather find a template to start with. Thanks.

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• Which is the best alternative for Java Serialization?

  - by Alotor

  I'm currently working on a project which needs to persist any kind of objects (of which implementation we don't have any control) so these objects could be recovered afterwards. We can't implement a ORM because we can't restrict the users of our library at development time. Our first alternative was to serialize it with the Java default serialization but we had a lot of trouble recovering the objects when the users started to pass different versions of the same object (attributes changed types, names, ...). We have tried with the XMLEncoder class (transforms an object into a XML), but we have found that there is a lack of functionality (doesn't support Enums for example). Finally, we also tried JAXB but this impose our users to annotate their classes. Any good alternative?

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• How reusable should ViewModel classes be?

  - by stiank81

  I'm working on a WPF application, and I'm structuring it using the MVVM pattern. Initially I had an idea that the ViewModels should be reusable, but now I'm not too sure anymore. Should I be able to reuse my ViewModels if I need similar functionality for a WinForms application? Silverlight doesn't support all things WPF does - should I be able to reuse for Silverlight applications? What if I want to make a Linux GUI for my application. Then I need the ViewModel to build in Mono - is this something I should strive for? And so on.. So; should one write ViewModel classes with one specific View in mind, or think of reusability?

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• Adding scrollbars to UserControl

  - by Bevin

  I am trying to add vertical and horizontal scrollbars to my UserControl with the HorizontalScroll and VerticalScroll properties, but I am having extreme issues. My problem arises when I drag or manipulate the scroll box on the bar. When I let it go, it simply jumps back to the start position! I know of the AutoScroll property, but I do not want to use it since I want to be able to control every aspect of my scrollbars, and I don't want it to be done automatically. Also, according to the documentation, AutoScroll is for "[enabling] the user to scroll to any controls placed outside of its visible boundaries" which isn't what I want. I just want scrollbars. ...aaand I suppose I could add VScrollBar and HScrollBar to the control, but why should I do this when the scroll functionality already exists? Seems like a waste to me.

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• Cloning objects in C#

  - by Alison

  I want to do something like... myObject myObj = GetmyObj()//create and fill a new object myObject newObj = myObj.Clone(); ...and then make changes to the new object that are not reflected in the original object. I don't often need this functionality so when it's been necessary I've resorted to creating a new object and then copying each property individually but it always leaves me with the feeling that there is a better/more elegant way of handling the situation. How can I clone/deep copy an object so that the cloned object can be modified without any changes being reflected in the original object?

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• LINQ to Objects .Distinct() not pulling distinct objects

  - by Anthony Potts

  I have two ways that I am doing a fuzzy search for a customer. One is by an abbreviated name and the other is by the customers full name. When I take these two and then union them together (which I have read several places should remove distinct values) I get duplicates. Thinking that all I need to do is then call the .Distinct() method on this I also still get Duplicates. Do I need to implement some compare functionality in my customer object? My code: Dim shortNameMatch As List(Of ICustomer) = CustomerLibrary.GetCustomersByShortName(term) Dim custNameMatch As List(Of ICustomer) = CustomerLibrary.GetCustomersByCustName(term) Dim allMatch = (From a In (From s In shortNameMatch Select s).Union(From c In custNameMatch Select c) Select a).Distinct()

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• Google Charts: Bar chart labels are reversed

  - by True Soft

  I create dinamically a chart for a website. I have a key/value map, I sort the values descending, and then create the url: http://chart.googleapis.com/chart? chs=400x200&cht=bhs&chbh=a&chdlp=l&chg=25,0&chma=0,0,0,5&chtt=Chart+test& chxr=0,0,8,1&chds=0,8&chxt=t,y& chd=t:8,5,3& chxl=1:|Label_8|Label_5|Label_3 The values are set by chd=t:8,5,3, and the labels are set by chxl=1:|Label_8|Label_5|Label_3. However, in the chart image the labels are reversed. I searched the documentation, but I didn't get why it is like this. Is it because I didn't set a value correctly, or is this the desired functionality? I could reverse the label texts in chxl from code to be displayed how I want. Is this the right way?

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• How much of Grails GORM to test?

  - by Lloyd Meinholz

  Is there a "best practice" or defacto standard with how much of the GORM functionality one should test in the unit/functional tests? My take is that one should probably do most of the domain testing as functional tests so that you get the full grails environment. But what do you test? Inserts, updates, deletes? Do you test constraints even though they were probably more thoroughly tested by the grails release? Or do you just assume that GORM does what it is supposed to do and move to other parts of the application?

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• How to Detect Right Click on the Taskbar

  - by Zay

  I've got a Windows Forms application in C# that starts off with a loading dialog. As expected, a button for the app shows up in the Windows taskbar. I would like to detect right-clicks that might be done to that button. Ultimately, I hope to disable the right-click or simply have the loading dialog regain focus. I've seen that some people use custom libraries and packages (interop, for example) to achieve some Win32 functionality, but I'd personally like to avoid this. Is it impossible to do without such libraries/packages?

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• Prototype/Scriptaculous Cycle (Slideshow) Plugin

  - by Salman A

  I've got a bunch of websites that use a few Prototype/Scriptaculous plugins such as lightbox and modalbox, hence include references to these two libraries on various pages. I now need to implement a slideshow on every page, and to follow suit, I need a Prototype cycle or slideshow plugin. The requirements are fairly simple: images should fade-in/out every N seconds four controls: prev, pause, play, next i'd prefer to add images to the slideshow via JavaScript; not by adding too many tags Can any one suggest an existing plugin that can be customized easily and is not bloated like most of the other plugins. Here is a jQuery plugin which provides similar functionality: http://malsup.com/jquery/cycle/lite/

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• Suggest product catalog script/framework in PHP which doesn't displays product price

  - by Amit Kumar Jha

  Hey all, I am new to web development and have this project in hand where in I have to build a product catalogue. I don't want any cart functionality or other such features, I just want to display the products,their specifications and images etc. on the website and give my client an admin panel to manage products. Now I looked into various PHP shopping cart scripts but couldn't find a way to remove price info from the display. I am not experienced enough in web development to make a product catalogue from scratch so if you guys could point me out in right direction I would be very grateful. If you could give me link to some shopping cart or cataloguing script or any other way to accomplish the task it would help me out a lot.. Thanks in advance to all those who reply.

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• Javascript - Concatenate Multiple NodeLists Together

  - by Emtucifor

  I was originally asking for an elegant way to simulate the Array.concat() functionality in IE or older browsers, because it seemed that concat was not supported. Only, of course it is and the reason the object didn't support it is because it wasn't an array. Oops! getElementsByTagName returns a NodeList, not an array. The real question, then, is: what's a good way to get a single list of all the form elements in a document (input, select, textarea, button) to loop through them? An array isn't required... a single NodeList would be perfect, too. Note that I'm using IE6 as this is for a corporate intranet (soon IE8 though).

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• Probability distribution for sms answer delays

  - by Thomas Ahle

  I'm writing an app using sms as communication. I have chosen to subscribe to an sms-gateway, which provides me with an API for doing so. The API has functions for sending as well as pulling new messages. It does however not have any kind of push functionality. In order to do my queries most efficient, I'm seeking data on how long time people wait before they answer a text message - as a probability function. Extra info: The application is interactive (as can be), so I suppose the times will be pretty similar to real life human-human communication. I don't believe differences in personal style will play a big impact on the right times and frequencies to query, so average data should be fine.

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• python urllib2 thread safety

  - by jldupont

  Is urllib2 thread safe? I find that using urllib2.urlopen sometimes results in the thread issuing the call to stop functioning. Yes I have used the timeout option to no avail. Is there a thread safe HTTP GET functionality I could use? NOTE: I am not interested in using Twisted to solve this problem. I have used Twisted in the past and I love it but this time I need a simpler solution. NOTE2: I also tried httplib with the same result (blocking).

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• jQuery UI Autocomplete with scrollbar z-index help

  - by rpf3

  I have a textbox that I am attaching jQuery UI's Autocomplete functionality to and I am using CSS to give it a max height via the example here. My problem is that doing this causes the z-index problem that bgiframe solves to come back again, but in a different way. The initial autocomplete menu is above all the controls underneath it, but when I begin to scroll the autocomplete menu falls behind them. Any suggestions? EDIT: This is purely an IE6 bug. As you can see, after scrolling down the autocomplete falls behind the other controls.

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• Open source project home page

  - by Oskar Kjellin

  I've created a software that I want to be able to market. I'd like to be able to post it on forums etc and for that I need a home page. Is there any open source C# project home pages that you can use? The functionality I'm looking for is like adding new versions (perhaps a version control from the software), downloading and user guides. So what I want is pretty basic: I want to be able to upload and let the users download. I've written this on my own as well but I guess that if there are open source projects that have done this they're probably better. This can't be such a rare problem so please lead me to some resources so that I can create my page and publish my software! :)

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