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• Lazy load pages in UIScrollView

  - by jean

  I have a UIScrollView that contains large images and am using paging to scroll between images. In order to save memory, I am loading only one image before and after the currently visible one and loading/releasing new images after a scroll has completed. The problem occurs when one scrolls quickly and scrollViewDidEndDecelerating is not called. How can I detect continuous scrolling? I could check item location on every scrollViewDidScroll but this seems a bit heavy...

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• echo XML values

  - by danit

  Here is my XML: object(SimpleXMLElement)#1 (2) { ["@attributes"]=> array(1) { ["type"]=> string(5) "array" } ["feed"]=> array(3) { [0]=> object(SimpleXMLElement)#2 (6) { ["title"]=> string(34) "Twitter / Favorites from bob" ["id"]=> string(27) "tag:twitter.com,2007:Status" ["link"]=> array(2) { [0]=> object(SimpleXMLElement)#5 (1) { ["@attributes"]=> array(3) { ["type"]=> string(9) "text/html" ["href"]=> string(38) "http://twitter.com/bob/favorites" ["rel"]=> string(9) "alternate" } } [1]=> object(SimpleXMLElement)#6 (1) { ["@attributes"]=> array(3) { ["type"]=> string(20) "application/atom+xml" ["href"]=> string(40) "http://twitter.com/favorites.atom?page=1" ["rel"]=> string(4) "self" } } } ["updated"]=> string(25) "2010-04-01T10:44:19+00:00" ["subtitle"]=> string(56) "Twitter updates favorited by Dan Humpherson / MoodleDan." ["entry"]=> array(20) { [0]=> object(SimpleXMLElement)#7 (7) { ["title"]=> string(104) "smashingmag: Sikuli: a visual technology to search and automate GUIs using images - http://bit.ly/6ArwzP" ["content"]=> string(104) "smashingmag: Sikuli: a visual technology to search and automate GUIs using images - http://bit.ly/6ArwzP" ["id"]=> string(72) "tag:twitter.com,2007:http://twitter.com/smashingmag/statuses/11389386545" ["published"]=> string(25) "2010-03-31T22:06:41+00:00" ["updated"]=> string(25) "2010-03-31T22:06:41+00:00" ["link"]=> array(2) { [0]=> object(SimpleXMLElement)#27 (1) { ["@attributes"]=> array(3) { ["type"]=> string(9) "text/html" ["href"]=> string(51) "http://twitter.com/smashingmag/statuses/11389386545" ["rel"]=> string(9) "alternate" } } [1]=> object(SimpleXMLElement)#28 (1) { ["@attributes"]=> array(3) { ["type"]=> string(10) "image/jpeg" ["href"]=> string(64) "http://a3.twimg.com/profile_images/572829723/original_normal.jpg" ["rel"]=> string(5) "image" } } } ["author"]=> object(SimpleXMLElement)#29 (2) { ["name"]=> string(17) "Smashing Magazine" ["uri"]=> string(31) "http://www.smashingmagazine.com" } } For the life of me I cannot get my code to work, all I want to do is echo the entry->content string but no matter what I try I get nothing. Can anyone assist an inept PHP n00b?

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• C# Putting the required DLLs somewhere other than the root of the output

  - by aip.cd.aish

  I am using EmguCV for a project and when our program runs it needs some dlls like "cxcore.dll" etc. (or it throws runtime exceptions). At the moment, I put the files in the root of the output folder (selected "Copy Always" in the file's properties in Visual Studio). However it looks a bit messy, to have about 10 different dlls just there. Is there someway where I can move it to a subfolder in the output folder and it'll still find it.

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• Use of * in Objective C Syntax

  - by user263097

  I'm struggling a bit with some objective c syntax. Can someone please elaborate on the usage of * in the following instance method. - (IBAction)sliderChanged:(id)sender{ UISlider *slider = (UISlider *)sender; } I realize that we are creating a variable typed as UISlider and then setting it to sender once it is cast as a UISlider. However, I don't understand what the * are for and why UISlider slider = (UISlider)sender; won't work.

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• In WPF, What is the best way to create toolbar buttons so that the images are properly scaled?

  - by T.R.

  Specifically, I'm looking to use the 16*16 32-bit png images included with the VS2008ImageLibrary. I've tried manually setting the Height and Width attributes of the image, adjusting margins and padding, adjusting Stretch and RenderOptions. My attempts to create toolbar buttons have all led to either Improper Scaling (blurry icons), the bottom row of pixels on the icon being truncated, or the toolbar button being improperly sized - not to mention the disappearing icons already mentioned Here. Has anyone found the best way to make standard, VisualStudio/WinForms-style toolbar buttons that display properly in WPF?

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• Microsoft Robotics Studio with Wine ? Is it possible ?

  - by Arkapravo

  I am using Ubuntu 9.10 and I am a bit of a robotics enthusiast. I have used KiKS (in MATLAB for simulating Khepera robots), MobotSim (in Windows, simulates a point like robot using a BASIC editor) and Player Stage/Gazebo (with C/C++ on Ubuntu Linux). My question, can MS Robotics Studio be installed in Ubuntu Linux using Wine (I am using 1.1.31) ? Has anyone done it ? Thanks for your reply !

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• Fluent interface and task based applications

  - by Mmarquee

  We have a number of applications that are now looking tired and a bit drab. Looking at the MS style fluent interface looks nice but seems (to me) to be more document based rather than task based. Is there a nice 'modern' ui style that lends itself to task based applications?

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• Return ArrayList from .net web service to android application using kSoap

  - by benjamin schultz

  My web service is returning quite a bit of data, so i'm storing it in an arraylist and returning that to my application. I don't know whether or not this is the preferred method or not. When the arraylist is returned and displayed in my application, it also displays the arraylists "anyType" section. I'm new to this whole process so i'm sure i'm missing something somewhere or going about this incorrectly. Can anyone point me in the right direction please?

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• How to make ARGB transparency using bitwise operators.

  - by Smejda

  I need to make transparency, having 2 pixels: pixel1: {A, R, G, B} - foreground pixel pixel2: {A, R, G, B} - background pixel A,R,G,B are Byte values each color is represented by byte value now I'm calculating transparency as: newR = pixel2_R * alpha / 255 + pixel1_R * (255 - alpha) / 255 newG = pixel2_G * alpha / 255 + pixel1_G * (255 - alpha) / 255 newB = pixel2_B * alpha / 255 + pixel1_B * (255 - alpha) / 255 but it is too slow I need to do it with bitwise operators (AND,OR,XOR, NEGATION, BIT MOVE)

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• Map /dev/bus/usb node to /sys node on Linux

  - by Cody Brocious

  I'm using libusb to find and access a USB device, but once I get the information I need from there, I need to map it to a /sys node. This could be to the actual USB bus it's on, the /sys/bus/usb-serial node (which is where I'm going to get eventually), or effectively anywhere else since I can walk the tree from there. I can get to a /dev/bus/usb node easily enough, but I'm a bit lost from there. What would be the best route to perform this mapping?

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• Handling empty UITableView in UITableViewController

  - by Travis

  I have a UITableViewController that is populated with some data. If the data comes back empty, obviously the table is empty. What is the appropriate method to use to handle this case and put up something like a UILabel with "No Data Available". I have been using - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section but it's proven a bit cumbersome and I'm not longer confident it's the best place to do this.

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• App.Config or XAML

  - by Florian Doyon

  Hi ladies(?) and gents, I am currently evaluating my options for a rewrite of the projects I'm working on and I am a bit miffed by the stringly-typed nature of our app.config files. I'd like to move to a more structured approach, so I have two options: Use custom SectionHandlers in the app.config Scrap app.config and use XAML instead. I'd like to get your opinions and horror stories on this, what are the pros and cons of using XAML for this? Cheers, Florian

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• Executing Custom Actions immediately in WIX

  - by jbloomer

  Is there any way to execute a custom action in WIX as soon as the first dialog (welcome) appears? The requirement is to check prerequisites, and some of those require a custom action. The custom action could be executed as we click to the next dialog, but then the standard WIX prereqs are determined apart from our custom prereq. (The custom action we need is to check that IIS 6 Metabase Compatibility is turned on and a registry search does not work on x64 machines with a 32-bit installer)

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• setTimeout() not executing

  - by Ben Shelock

  I've got this simple function which displays a message to the user. If I add the timeout parameter it will slide back up automatically if not the user has to click it to get rid. But the timeout bit isn't working. function feedback(text, timeout){ $('#feedback').text(text).slideDown('fast'); $('#feedback').click(function(){ $(this).slideUp(); }); if(timeout){ setTimeout(function(){ $('#feedback').slideup(); }, timeout); } }

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• Blogs / books with advise, tips and information from developers

  - by Wizzard

  Good Morning. I've been reading Joel Spolsky's (joelonsoftware) articles and they are full of good information and tips. He's a good writer and well worth reading. I am wondering what other good blogs/articles/books are out there written by similar people - really after leaders/managers/biz owners who are/were developers. Hope that makes a bit of sense ;-)

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• How do you setup the Audio plugin for Flowplayer?

  - by codeninja

  I'm having a bit of trouble getting the Audio player to work. Basically I want to initiate an mp3 player doing something like this <a href="path-to-my-audio.mp3" id="player" ></a> and then use the $f() call to initate the player. I've followed the instructions here (http://flowplayer.org/plugins/streaming/audio.html) This doesnt seem to be work and I'm not sure what's wrong because I'm able to play videos in this way. Thanks for your help!

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• Navbar List Items Not Showing in Internet Explorer 6

  - by Theo

  Hi everyone, I have a bit of a problem with a navbar not displaying correctly in IE6. http://classicpartsltd.com/ - this is the page, and if you hover over a nav item such as 'Goggles' in IE6 you will see that some of the list items are showing up, but that they will in IE7 and IE8... Does anyone know why this would be the case? Many thanks, Theo.

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• What does all these FindBugs prefixes AM, BC, DP, ... mean?

  - by Hans Klock

  http://findbugs.sourceforge.net/bugDescriptions.html contains a long list of error types. They belong to a category like correctness and performance but do start with an prefix too. EQ for equality is obvious, same like SQL or BIT. But some cryptic. Is there a list what all these prefixes mean?

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• Counting nonzero elements in a list with Python list comprehensions

  - by AntiRush

  I have a list of integers and I need to count how many of them are 0. I'm currently doing it with a list comprehension that looks like this: sum([1 for x in frequencies if x > 0]) It seems like a decent comprehension but I don't really like the "1"; it seems like a bit of a magic number. Is there a more Pythonish way to do this?

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• Rotate webpage via code?

  - by Adam Davis

  I'm hoping that there's a relatively simple way to rotate a webpage a little bit, 30 degrees or so, while still leaving it fully functional and usable. I completely control the page, and can modify it to make this easier if needed. I'd rather not re-write the whole thing in SVG, though, but perhaps javascript and canvas will work? Is there a way using CSS, Javascript, or some other cross browser method that would allow me to accomplish this?

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• Xcode - Drawing Pixels

  - by Brett

  Hi guys; I am trying to draw individual pixels in xcode to be outputted to the iphone. I do not know any OpenGL or Quartz coding but I do know a bit about Core Graphics. I was thinking about drawing small rectangles with width and height of one, but do not know how to implement this into code and how to get this to show in the view. Any help is greatly appreciated. Thanks, Brett

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• C# multi CPU for ThreadPool.QueueUserWorkItem

  - by ikurtz

  I have a program that uses: ThreadPool.QueueUserWorkItem(new WaitCallback(FireAttackProc), fireResult); On Windows7 and Vista it works fine. When I try to run it on XP the result is a bit different from the others. I was just wondering in order to execute QueueUserWorkItem properly do I need a dual CPU system? The XP I tried to test on had .Net 3.5 installed. Inputs most welcome.

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• why does vb.net not support multiple inheritance?

  - by isolatedIterator

  I've seen some discussion on why c# does not implement multiple inheritance but very little as to why it isn't supported in vb. I understand that both c# and vb are compiled down to intermediary language and so they both need to share similar restrictions. The lack of multiple inheritance in VB seems to have been given as one reason for the lack of the feature in dot net. Does anyone know why VB doesn't support multiple inheritance? I'm hoping for a bit of history lesson and discussion on why this was never considered for VB.

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• How is parsing phase in a compiler different from a rule engine ?

  - by abhinav

  Hi, I have a rough understanding of how the compilers work (I mean languages, grammars, lexical analysis, parsing etc). The rule engines have various rules and associated action, just like you have rules in the grammars and you can associate actions with them in parser-generator tools like ANTLR. So I am a bit confused on how to differentiate between these two. Could anyone give a clearer, more formal explanation for the differences ? Thanks, Abhinav.

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• openid along with oauth ?

  - by iamgopal

  in my application, user sign in/sing out via openid ( same as stackoverlfow ). i would like to open up my application a bit via oauth to third party applications. how do i create my app which is openid-consumer to make it oauth-provider ? is there some standard,library etc out there ? i am basically working in app engine and python.

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