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• 2D collision detection and stuff with OpenGL

  - by shinjuo

  I am working on a simple 2D openGL project. It contains a main actor you can control with the keyboard arrows. I got that to work okay. What I am wanting is something that can help explain how to make another actor object follow the main actor. Maybe a tutorial on openGL. The three main things I need to learn are the actor following, collision detection, and some kind of way to create gravity. Any good books or tutorials to help get me in the right direction would be great.

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• AppleScript to open URL in Safari crashes for Flash-based websites

  - by Mark

  I'm trying to open a URL in Safari. It works fine for websites without Flash embedded, but crashes Safari for Flash sites. Example (this WORKS): tell application "Safari" to open location "http://google.com" This CRASHES when Safari is not already running: tell application "Safari" to open location "http://grooveshark.com" Two things I noticed: Safari only crashes for websites with embedded Flash The script above only crashes if a new instance of Safari is created (i.e. Safari was not running before) From the second observation I assume that it could be a permission issue of some sort. Maybe the Safari instance launched from the AppleScript has a problem loading plugins?

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• How to rename an alias in PowerShell?

  - by jwfearn

  I want to make my own versions of some of the builtin PowerShell aliases. Rather than completely removing the overridden aliases, I'd like to rename them so I can still use them if I want to. For example, maybe I'll rename set to orig_set and then add my own new definition for set. This is what I've tried so far: PS> alias *set* CommandType Name Definition ----------- ---- ---------- Alias set Set-Variable PS> function Rename-Alias( $s0, $s1 ) { Rename-Item Alias:\$s0 $s1 -Force } PS> Rename-Alias set orig_set PS> alias *set* CommandType Name Definition ----------- ---- ---------- Alias set Set-Variable Any ideas as to why this isn't working?

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• Problem creating site using Microsoft Visual Web Developer Express 2008

  - by Peter

  Hi, this is a very newbie question, sorry! I need to create an aspx website based con C# and am calling some webservices based on some DLL's I already have. Beforem purchasing Visual Studio, I decided to try Microsoft Visual Web Developer Express (is this ok?) creating a Web Application ASP.NET based on Visual C#. I created the form to enter the data which is submitted when clicking the process button. At this point I need to call stuff from the DLL, which I have added in the Solution Explorer via Add Reference, selecting the DLL from the COM list. But whenever I run the project, I always get the error "the type or namespace xxx cannot be found - maybe a using directive or assembler directive is missing" when trying to create the object. What is my stupid mistake? Thanks!

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• science.js’s loess() output is identical to input

  - by user3710111

  Rendered project available here. The line is supposed to be a trend line (as rendered with LOESS), but it merely follows each data point instead. I am no stats wonk, so maybe it makes sense that a LOESS function’s output would match the input as seen in the above example, but it strikes me as being wrong. Here is the relevant bit of code: var loess = science.stats.loess().bandwidth(.2); var xVal = data.map(function(d) { return d.date; }); var yVal = data.map(function(d) { return d.A; }); var loessData = loess([xVal], [yVal])[0]; console.log(yVal); console.log(loessData);

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• How to integrate pep8.py in Eclipse?

  - by DZPM

  A little background: PEP 8 is the Style Guide for Python Code. It contains the conventions all python programmers should follow. pep8.py is a (very useful) script that checks the code formating of a given python script, according to PEP 8. Eclipse is a great IDE. With the Pydev extension, it that can be used to develop Python I run pep8.py manually when I'm scripting, but with bigger projects I prefer to use Eclipse. It would be really useful to integrate pep8.py in Eclipse/Pydev, so it can be run automatically in all the files in the project, and point to the lines containing the warnings. Maybe there is an obvious way to do it, but I haven't found it yet. Question is: How to integrate pep8.py in Eclipse?

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• Large PHP enable web form - around 75 field - how best to send email with all fields?

  - by Derek

  Have created simple Ajax enabled contact forms before that have around 12 fields - worked fine.... Now working on a PHP enabled web page for job applications that has around 100 fields. The ajax technique I was using was to send request via querystrings (&val1=test;&val2=test2 and etc ...) That is not going to scale very well with larger form with 100+ fields. Any suggestions to point me in the right direction would be appreciated. Maybe use jQuery Form plug-in instead? http://jquery.malsup.com/form/#getting-started Derek

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• navigationController -- advertisement -- tableView in iPhone

  - by SeniorLee

  I've already implemented an app that has navigationController at the very top, and it shows tableView at the first, and if it's cell is clicked, another view is pushed into the navigationController. It's just an simple & normal app. But I want to put an ad between the navigationBar and the tableView. I've tried this and that. but it didn't work. Maybe there are several good ways to do it I believe. Hope somebody point me a good tutorial or throw me ideas. thanks.

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• WPF dependency property setter not firing when PropertyChanged is fired, but source value is not cha

  - by Sandor Davidhazi

  I have an int dependency property on my custom Textbox, which holds a backing value. It is bound to an int? property on the DataContext. If I raise the PropertyChanged event in my DataContext, and the source property's value is not changed (stays null), then the dependency property's setter is not fired. This is a problem, because I want to update the custom Textbox (clear the text) on PropertyChanged, even if the source property stays the same. However, I didn't find any binding option that does what I want (there is an UpdateSourceTrigger property, but I want to update the target here, not the source). Maybe there is a better way to inform the Textbox that it needs to clear its text, I'm open to any suggestions.

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• Using Symbol MC70 series scanner with native code

  - by Sandeep

  Is it possible to use Symbol MC70 series scanner with native code? I have a Windows Mobile application written using Lazarus(Object pascal) and I want to use it with Symbol MC70. The sdk that they have are for C, .NET and Java. I had a look at the C sdk and it comes with .LIB files which I cannot use with Object Pascal. I have no clue as to how the scanner is working with .NET stuff, I could not see a WIN32 dll in the files provided, maybe it is in the cab file. Any suggestions as to what I should do to get the scanners to work for me. Sandeep

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• NSOperation and UIKit problem

  - by Infinity

  Hello guys! I am doing my download with an object which was inherited from NSOperation. I have read the documentation and when my operation finished I must call the [self.delegate performSelectorOnMainThread:@selector(operationDidFinish:) withObject:self waitUntilDone:YES]; method. It needs to be called on the main thread, because the UIKit is not thread safe and the documentation says this in these non thread safe frameworks cases. In the delegate method I am drawing a pdf or an image, but because it is drawn on the main thread the User Interface is very laggy until the drawing is finished. Maybe can you suggest me a good way to avoid this problem?

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• Using Kate with Simple Build Tool (SBT)

  - by Stefan

  Hello I am working with the Kate editor based on the lack of other good tools for Scala development, I am also using IntelliJ however it still has some bugs, and are slow enough to make me impatient. I have just startet using both Kate and SBT, and in that regard I have a little challenge I hope there is an answer for out there on "The Internet". I am using the standard "Build plugin" in Kate and has changed the commands from make to sbt. This works fine, and I am also getting a error report when the sbt fails during compile time. However I really wish to know if it is possible to integrate the compile errors into Kate such that it would be shown under "Errors and Warnings" instead of just in the output tab, where I have to do a manual search for the compile errors. Im guessing that it has something to do with the format of the output, if that is the case maybe it is "just" a smaller adjustment I need to make to the parsing language.

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• complex mysql rank !

  - by silversky

  I have a tb with this col: ein, los, id ... I whant to order the table by this index: win / ( win + los ) * 30 + win / SUM(win) * 70 and then to find the rank for two id's. I'm not very good on mysql, so whath I wrote it's totally wrong: $stmt=$con-prepare("SET @rk := 0"); $stmt=$con-prepare("SELECT rank, id FROM ( SELECT @rk := @rk + 1 AS rank, (win/(win+los)*30+win/SUM(win)*70) AS index, win, los, id FROM tb_name ORDER BY index DESC) as result WHERE id=? AND id=?"); $stmt - bind_param ("ii", $id1, $id2); $stmt - execute(); $stmt - bind_result($rk, $idRk); And also this query it supouse to run maybe every 5-10 sec for every user, so I'm trying to find something very, very fast. if it's necesary I could add, change, delete any column, in order to be as faster as posible.

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• What is the easiest way to get an embedded upload progress bar using Ruby/Sinatra/Haml/Passenger/ngi

  - by mmr

  I have a website where people can upload 30+mb of data in a single block, and I want to be able to show them the progress of their upload without causing the web page to become unresponsive, similar to how flash uploads work in gmail. There's this question here, but I don't know if that progress bar is embedded in the page or if it's using the browser's progress bar. I'm also a bit of a web newb, so I'm not sure if it's the 'easiest'. I asked the swfupload guys how to do this here, and the answer I got is 'this tool requires some knowledge to use it' without giving me much help in figuring out where to get started. I also asked this question on ServerFault, and got no response, so maybe that was the wrong place to ask. I'm all for learning new things and so forth, but there are a lot of potential pathways to take here. Where should I start, and what do I need to know to make everything work with sinatra, haml, ruby, passenger, and nginx? Thanks!

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• Quick way to create JSF custom component

  - by michael lucas

  I know of two ways of creating custom JSF components: 1. Native JSF way: creating JSF component class, tag, etc. 2. Facelets way: defining component in a xhtml file and then creating appropriate decrption in facelets taglib. Currently I work on a project in which introducing facelets is unfortunately out of the question. On the other hand, creating custom components the standard JSF way seems like a pain in the ass. Is there maybe a third party library that allows creating custom components in the way similar to facelets but doesn't entail the need of using non-standard renderer?

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• Android Emulator - Cannot get keyboard to display

  - by Ash

  Basically I cannot get the onscreen keyboard to display at all. I've tried every solution I've read to make it appear within my application, and now I've come to the conclusion that it must be the emulator as it isn't appearing when using Messages, writing e-mails etc. I've looked in Language & input within settings and checked Sample Soft Keyboard, rebooted the emulator with no change. Using Android SKD 2.3.3 3.7in WVGA (Nexus One) I'm hoping someone can maybe guess what's going on. Many thanks

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• How can a Delphi TForm / TPersistent object calculate its own deserialization time?

  - by mjustin

  For performance tests I need a way to measure the time needed for a form to load its definition from the DFM. All existing forms inherit a custom form class. To capture the current time, this base class needs overriden methods as "extension points": start of the deserialization process after the deserialization (can be implemented by overriding the Loaded procedure) the moment just before the execution of the OnFormCreate event So the log for TMyForm.Create(nil) could look like: - 00.000 instance created - 00.010 before deserialization - 01.823 after deserialization - 02.340 before OnFormCreate Which TObject (or TComponent) methods are best suited? Maybe there are other extension points in the form creation process, please feel free to make suggestions.

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• How do I edit a "ell in an MFC Listbox?

  - by Pedro

  I have CListBox control that has 2 columns and any number of rows. I want the user to be able to click(or maybe double-click) a "cell" and be able edit the text therein. link text (Can't post images yet, need +10). What I mean is that I want to be able to click and edit any of the places where it says "TEST" by clicking on the text to make it editable. How should I go about this? I suppose I should use a mouse click event but how would I make the cell editable?

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• Is it possible to filter by conditions before paginating?

  - by Brian Roisentul

  I'm using ruby on rails 2.3.8 and will_paginate plugin. I've just noticed that if I write something like this: Announcement.paginate :page => params[:page], :per_page => 10, :conditions => some_condition it will work. But, if I write something like this: announcements = Announcement.all :conditions => some_condition @ann = announcements.paginate :page => params[:page], :per_page => 10 it won't recognize conditions. Maybe you're wondering "why would he want to do that?", well, it's a long story and I really need to first filter the conditions and then paginate the results.

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• Handling hundreds of actions in Struts2

  - by Roberto

  Hi all, I've inherited a struts 1 web application where, in order to reduce the number of Action classes (I guess this is the reason), lots of actions are mapped inside a single Action class, like: public XXXAction() throws Exception{ actions = new Hashtable(); actions.put("/XXX/main/load", new Integer(0)); actions.put("/XXX/main/save", new Integer(1)); ...... } public ActionForward executeAction(ActionMapping mapping, ActionForm form, HttpServletRequest req, HttpServletResponse res) throws IOException, ServletException { try { switch (((Integer) actions.get(action)).intValue()) { case 0: loadXXXMain(); break; case 1: ....... and so on (in some Action classes I have almost one hundred of these small actions). Now I'm looking at migrate to struts2 and I would like to have a cleaner and better solution to handle this, maybe without having a single Action class for each of these small classes. What do you suggest? I don't like this solution, but I don't like having hundreds of Action classes.... Thanks! Roberto

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• Blogger (Python) API: How do I retrieve a post by post ID?

  - by larsks

  Having previously obtained a post ID from a call to gdata.blogger.client.add_post()... post = client.add_post(...) post_id = post.get_post_id() ...how do I use that post id to retrieve the post in the future? I thought maybe gdata.blogger.client.Query would be the way to go, but this doesn't support post id as a query term. The example code distributed with the Python gdata module doesn't have an example of this use case, and after poking around gdata.blogger.client.* for a while I'm not making much progress. I could obviously iterate through all the posts in the blog until find the one with the corresponding id, but that would be a terrible, terrible idea.

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• Save a UIImageView using NSUSerDefaults

  - by Magician Software

  How do you save an Image using NSUSerDefaults The main image is set in IB, the secondary image is set here - (IBAction)changeImage { CATransition *fadeThing = [CATransition animation]; fadeThing.type = kCATransitionFade; fadeThing.subtype = kCATransitionFade; fadeThing.duration = 1; [CATransaction begin]; [background.layer addAnimation:fadeThing forKey:@"superCoolSloMoFadingAnimation"]; [background setImage:[UIImage imageNamed:@"Mainbackground.png"]]; [CATransaction commit]; I will have different actions for different images. Anyway of setting this up so I can use a toggle button maybe and change the image as well as save it Thanks

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• How to simulate a fake MouseOver on a Flash applet in a webpage?

  - by Mason Wheeler

  I listen to internet radio at http://player.play.it/player/player.htm and it works pretty well, except for one minor issue. The Flash applet that runs the radio player has a timer on it, where if you don't move the mouse over the player every once in a while, it decides you're idle and shuts off the stream, even if you're not actually idle, but just working on something else with the radio player running in the background. Is there any way I can send a fake MouseOver message to this applet to keep it from cutting me off in the middle of a song, maybe with a GreaseMonkey script? I'm using Firefox.

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• Counting number of children in hierarchical SQL data

  - by moontear

  Hello, for a simple data structure such as so: ID parentID Text Price 1 Root 2 1 Flowers 3 1 Electro 4 2 Rose 10 5 2 Violet 5 6 4 Red Rose 12 7 3 Television 100 8 3 Radio 70 9 8 Webradio 90 For reference, the hierarchy tree looks like this: ID Text Price 1 Root |2 Flowers |-4 Rose 10 | |-6 Red Rose 12 |-5 Violet 5 |3 Electro |-7 Television 100 |-8 Radio 70 |-9 Webradio 90 I'd like to count the number of children per level. So I would get a new column "NoOfChildren" like so: ID parentID Text Price NoOfChildren 1 Root 8 2 1 Flowers 3 3 1 Electro 3 4 2 Rose 10 1 5 2 Violet 5 0 6 4 Red Rose 12 0 7 3 Television 100 0 8 3 Radio 70 1 9 8 Webradio 90 0 I read a few things about hierarchical data, but I somehow get stuck on the multiple inner joins on the parentIDs. Maybe someone could help me out here. moon

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• Parse values from a text file in C

  - by Mohit Deshpande

  Say I have written to a text file in this format: key1/value1 key2/value2 akey/withavalue anotherkey/withanothervalue I have a linked list like: struct Node { char *key; char *value; struct Node *next; }; to hold the values. How would I read key1 and value1? I was thinking of putting line by line in a buffer and using strtok(buffer, '/'). Would that work? What other ways could work, maybe a bit faster or less prone to error? Please include a code sample if you can!

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