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• What kind of math should I be expecting in advanced programming?

  - by I_Question_Things_Deeply

  And I don't mean just space shooters and such, because in non-3D environments it's obvious that not much beyond elementary math is needed to implement. Most of the programming in 2D games is mostly going to involve basic arithmetic, algorithms for enemy AI and dimensional worlds, rotation, and maybe some Algebra as well depending on how you want to design. But I ask because I'm not really gifted with math at all. I get frustrated and worn out just by doing Pre-Algebra, so Algebra 2 and Calculus would likely be futile for me. I guess I'm not so "right-brained" when it comes down to pure numbers and math formulas, but the bad part is that I'm no art-expert either. What do you people here suppose I should do? Go along avoiding as much of the extremely difficult maths I can't fathom, or try to ease into more complex math as I excel at programming?

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• Detect touch Cocos2d-x

  - by James Dunay

  I'm using Cocos2d-x and trying to detect touches in my HelloWorld project. Though I'm having no luck. .h class HelloWorld : public CCLayer{ private: CCSpriteBatchNode * _batchNode; CCSprite *_turkey; virtual void ccTouchesBegan(cocos2d::CCSet* touches, cocos2d::CCEvent* event); .ccp void HelloWorld::ccTouchesBegan(cocos2d::CCSet* touches, cocos2d::CCEvent* event){ CCLog("this"); } but the thing is that when I click the screen 'this' never shows up in the log. What am i missing here? thanks!

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• Software Center crashes and terminal errors

  - by user97521

  *note*I'm a new user to Ask Ubuntu and I've only recently switched to Ubuntu 12.04. When I try to open the software center (Ubuntu 12.04 32-bit) it will flash open, load for maybe 1-2 seconds, and then close. When i try using: sudo apt-get purge software center sudo apt-get install sudo apt-get update sudo apt-get upgrade I get this within the terminal: Reading package lists... Error! E: Problem parsing dependency Depends E: Error occurred while processing printer-driver-hpcups (NewVersion2) E: Problem with MergeList /var/lib/dpkg/status E: The package lists or status file could not be parsed or opened. *The problem fixed itself after I shut down my laptop for the night and turned it back on to check my e-mail this afternoon. If anyone could tell me how to fix this problem in the future please do, I would like to learn about these kind of things because i don't plan on putting windows on my laptop again :P *

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• jQuery Week Calendar overlapping problem

  - by araid

  Hi, I'm developing an application with uses this calendar for resource reservation, but I have a problem when creating a new event. I don't want events to overlap, so I set allow allowCalEventOverlap to false. However, it still overlaps in a transparent way. But the biggest problem is that I can't drag an event if there's another on the same day, even if their start and end dates don't overlap. You can try this strange behavior in the 2nd demo: http://robmonie.github.com/jquery-week-calendar/weekcalendar_demo_2.html Any help on how to fix or understand it will be very appreciated. Regards,

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• What job is most similar to being a DBA?

  - by fatherjack

  As long as I have worked with computers, and that's a length of time that may be easier on the eye when converted to dog-years, computers have been compared with cars. I guess the car was the most complicated thing in our lives until the PC arrived. We had plenty of time to get used to the car and how it worked, or not, and how it gradually became more complex. We can compare backups to spare tyres, CPU cores to pistons ("the more you blow, the faster you go"), and so on. I am not aware...(read more)

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• Field contains foreign IDs for different tables

  - by Rich

  I am developing a php/mysql driven facebook game. I am stuck on an element the table design. When a user completes a task I want to trigger any number of events. I was thinking of something like so: tbl_events *event_id - serogate primary ID *task_id - foreign ID of the task just completed *event_type - what type of event e.g is it a facebook stream publish or a message to the user or does it unlock a new element of the game? *event_param - this is where it gets tricky... the event parameter is a problem for two reasons, 1) it will contain different foreign ids... dependent on the event_type and thus it will not be possible to join to x table. Meaning I would have to call two queries. 2) Most events require a single id or text, however some events require multiple parameters - like the facebook stream publish.

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• how to pass a parameter to method with php's is_callable

  - by fayer

  i have to create a variable that is callable with php's is_callable i have done this: $callable = array(new MyClass, 'methodName'); but i want to pass a parameter to the method. how can i do that? cause using symfony's event dispatcher component will be like: $sfEventDispatcher->connect('log.write', array(new IC_Log('logfile.txt'), 'write')); the first parameter is just a event name, the second is the callable variable. but i can only call the write method, i want to pass a parameter to it. could someone help me out. thanks

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• Jquery Scrolling

  - by Rich - Pixel Vector

  I have implemented the following code from this page: http://tympanus.net/codrops/2010/06/02/smooth-vertical-or-horizontal-page-scrolling-with-jquery/ $(document).ready(function() { $('ul.navone li a, ul.navtwo li a,a.toplink, a.bodylink').bind('click',function(event){ var $anchor = $(this); $('html, body, header').stop().animate({ scrollTop: $($anchor.attr('href')).offset().top }, 1500,'easeInOutExpo'); event.preventDefault(); }); }); This all works correctly. However, in my layout I have a fixed header div (i.e. it stays in place when the user scrolls). Therefore I need to set an offset for the scrolling script of 117 pixels. How do I do this please?

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• customizing item renderer

  - by BretzelPretzel

  i would like the label and message to be on the left of the icon....i would also like the icon to be right-aligned what is the best way to do this? I'm confused by some of the tutorials i'm seeing for custom item renderers since they never explain how to format the renderer mxml, so i haven't figured that out yet although i suspect that's what i need to be doing <?xml version="1.0" encoding="utf-8"?> <s:View xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:components="components.*" creationComplete="imagelistings.send()" title="{data.title}"> <fx:Script> <![CDATA[ import mx.collections.ArrayCollection; import mx.events.FlexEvent; import mx.rpc.events.FaultEvent; import mx.rpc.events.ResultEvent; import spark.events.IndexChangeEvent; import valueObjects.imagelistingclass; [Bindable] private var listings:ArrayCollection = new ArrayCollection(); protected function toursService_resultHandler(event:ResultEvent):void { var listingarray:ArrayCollection=event.result.Chapter1.entry; var entry:imagelistingclass; for each(var plate:Object in listingarray) { entry=new imagelistingclass(); entry.image=plate.image; entry.location=plate.location; entry.html=plate.html; listings.addItem(entry); } } ]]> </fx:Script> <fx:Declarations> <s:HTTPService id="imagelistings" result="toursService_resultHandler(event)" url="assets/chapter1info.xml"/> </fx:Declarations> <s:List id="theList" left="0" right="0" top="0" bottom="0" alternatingItemColors="#000000" contentBackgroundColor="#404040" dataProvider="{listings}" horizontalScrollPolicy="off" > <s:itemRenderer> <fx:Component> <s:IconItemRenderer color="#FFFFFF" fontSize="30" iconField="location" labelField="" iconFillMode="scale" iconScaleMode="letterbox" iconHeight="125" messageField="image"> </s:IconItemRenderer> </fx:Component> </s:itemRenderer> </s:List>

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• MS Access raise form events programmatically

  - by Eric G

  Is it possible to raise built-in MS Access form events programmatically? I have a feeling it isn't but thought I would check. (I am using Access 2003). For instance, I want to do something like this within a private sub on the form: RaiseEvent Delete(Cancel) and have it trigger the Access.Form delete event -- i.e. without actually deleting a bound record. Note my delete event is not handled by the form itself but by an external class, so I can't simply call Form_Delete(Cancel).

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• Using DispatcherUnhandledExceptionFilterEventArgs

  - by user341689

  I tried setting DispatcherUnhandledExceptionFilterEventArgs.RequestCatch to false in order to not call the UnhandledException event handler...but this doesnt work...could someone post an example of how to do this

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• Objective-C property getter

  - by Daniel

  What is technically wrong with the following: @property(nonatomic, assign) NSUInteger timestamp; @property(nonatomic, readonly, getter = timestamp) NSUInteger startTime; @property(nonatomic, assign) NSUInteger endTime; I am sure I can find a better way to organise this, but this is what I ended up with at one point in my project and I noticed that accessing the startTime property always returned 0, even when the timestamp property was set to a correct timestamp. It seems having set the getter of startTime to an existing property (timestamp), it is not forwarding the value of timestamp when I do: event.startTime => 0 event.timestamp => 1340920893 All these are timestamps by the way. Just a reminder, I know the above should have happened in my project but I don't understand why accessing startTime doesn't forward onto timestamp property. UPDATE In my implementation I am synthesising all of these properties: @synthesize timestamp, endTime, startTime; Please check an example object to use that demonstrates this at my gist on GitHub: https://gist.github.com/3013951

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• execute php via mysql ?

  - by Abhishek Nair

  Is it possible to execute a php file using mysql stored procedure or event scheduler?

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• Email is not working in Salesforce REST API for Events

  - by Hitesh

  We are using Salesforce REST OAuth API for creating events. Here is the sample - $content =json_encode(array("ActivityDateTime"=>$start,"WhoId"=>$userid,"Subject"=>$name,"StartDateTime"=>$start,"DurationInMinutes"=>30)); $obj=new sfdc_API($access_token,$instance_url); $action="sobjects/Event/"; $contactURL=$obj->apiURL($action); $obj->httpPost($contactURL,$content); // PHP Curl Post Request This code is creating an Event on Salesforce for the Contact ( Mentioned in WhoId) but its not sending the email. We want to send an email as well by Salesforce only. Thanks in advance.

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• Behaviour of System.Timer when Interval property changed

  - by lowlyintern

  I have a System.Timer setup to trigger an event every day at 2AM. If the process the timer starts fails then I want the timer to be reset to run every 15 minutes until the process completes succesfully. // this is how the timer is set up. // this is working correctly. double startTime = milliseconds_of_hour_to_start. Timer = new System.Timers.Timer( startTime); Here is the code to reset the timer on success or failure of the event handler. NOTE the timer is not being stopped, just the Interval property is being reset. if (ProcessSuccess) { Timer.Interval = TimeSpan.FromHours(24).TotalMilliseconds; } else { Timer.Interval = TimeSpan.FromMinutes(15).TotalMilliseconds; } My question is this, if the process fails say 4 times, then succeeds will the Timer now be running at around 3AM? i.e. after failing will the original start time of 2AM be advanced by 15 minutes?

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• jQuery child of clicked element

  - by Tom

  Hi, I've got a list of links which have a click event attached to them, I need to get the ID from the child A link. So in the example below if I clicked the first list element I'd need google retuned. I've tried '$this a' but can't quite work out the syntax. jQuery: $("ul li").click(function(event){ $("input").val($(this).html()); } ); html: <ul> <li><a href="http://www.google.com" id="google">Google</a> </ul>

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• Vermont IT Jobs: .NET Developer in Downtown Burlington

  Applications Engineer Aurora North Software, Inc. Burlington-based software development & consulting company offers an opportunity to rapidly advance your skillset using the latest MS technologies to develop and implement core systems at some of the countrys most prestigious law firms.  Projects include product integration, workflow processing, business intelligence, and SharePoint development. Requires a minimum 2-5 years experience with full development life cycle, .NET development experience,...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How to create a manager class without global variables nor singletons?

  - by Omega

  I would like to implement some kind of manager class in my application. It will be in charge of loading textures, processing them, distributing them etc... At first, I wanted to make a global variable that simply contains an instance of my manager class. I found this question: http://stackoverflow.com/questions/4646577/global-variables-in-java. However, the users there seem to recommend to never use global variables. Fine then, I once heard about Singletons, so I though I could use that instead. I mean, creating just one instance of my manager class sounds good. However, I found this other question: When is Singleton appropriate?, which basically tells me that Singletons are, in most scenarios, some kind of anti-pattern. Now I am a bit lost - what other approach can I take to create my manager class, whose only requirement is to be accessible from anywhere?

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• Attach an HREF and a class to an img link generated by the PhotoSlider script?

  - by Frank Bailey

  Hi folks, I'm using the very nice PhotoSlider script from http://opiefoto.com/articles/photoslider to create a slide show of images for one of my clients. This script replaces a previous hand-coded Javascript solution that allowed for the large image to be clicked resulting in a lightbox modal popup showing the full-size version of the clicked picture. Of course the client insists that this functionality remain intact, but the HTML code for the large image is generated on-the-fly by the PhotoSlider script itself. This means I'll need to modify the script slightly to attach a class ("lightbox") and an href (or just a click event, whichever makes more sense), but I'm not quite sure how best to accomplish this. I figure the event and class will have to be attached each time a thumbnail is clicked, but if this isn't the best way to do it any advice will be appreciated. The script is implemented into my page as can be seen here, without the click or class. I'd really appreciate any assistance stackoverflowites can offer. Thanks in advance!

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• Attach to Property's setter

  - by StupidDeveloper

  I haven't found similiar post so I'm asking this. Let's say I defined somewhere an application wide available static Property (I mean it's not local) and in one class I would like to know when this property is being changed. Apart from aop (transparentproxy etc.) which I think doesn't suit me well here (and I can't add that to project anyway), what are the options here? One solution I can think of, which is probably a very nasty one, is to use some event that would be executed in the setter and just attach it in the class(es) which needs that. Something like: public static event EventHandler CurrentNumberChanged= delegate {}; public static int CurrentNumber { get { return currentNumber; } set { currentNumber = value; CurrentNumberChanged(null, EventArgs.Empty); } } I know it's really unsafe to use such events ( read here ). And since I would use it in asp.net makes it even more ugly. Do you have any advices ?

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• Possible to implement an IsViewPortVisible dependencyproperty for an item in an ItemsControl?

  - by Matt H.

  I need to enable/disable spell checking in a richtextbox in an ItemsControl, based on whether the RichTextBox is visible in the ItemsControl's Scrollviewer. I think the route is to implement an IsViewPortVisible dependency property and wire an event handler for a changed event... I found this article that describes the lengthy process for determining if an item is in the viewport: http://social.msdn.microsoft.com/Forums/en/wpf/thread/e6ccfec3-3dc0-4702-9d0d-1cfa55ecfc90 Any ideas on where to start? I'm familiar with implementing my own dependency property for the sake of simple bindings (integers, strings, etc...). I have no idea how to undergo something like this though) This is the end result I'm hoping for: <DataTemplate> <Grid> ...Stuff in the Grid <local:CustomRichTextBox SpellCheck.IsEnabled={Binding RelativeSource={RelativeSource Self}, Path=IsViewPortVisible}/> </Grid> </DataTemplate> Help will be EXTREMELY appreciated... you'll be saving me about 500MB in memory consumption while the program is running!!!! :)

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• What makes Java so suitable for writing NoSQL Databases

  - by good_computer

  Looking at this page that aggregates the current NoSQL landscape, one can see that the majority of these projects are written in Java. Databases are complex systems software dealing with the file system, and so C/C++ would be a better choice than Java for this. (that's my thinking which might be flawed) Secondly, databases deal with transferring large amounts of data from disk to RAM -- which they call a working set. The JVM takes non-trivial amount of RAM for it's own purpose -- so it would be more efficient to use a platform that leaves lots of memory for data instead of hogging it for its own operations. The major relational databases are ALL written in C/C++ MySQL C, C++ Oracle Assembler, C, C++ SQL Server C++ PostgreSQL C SQLite C So what makes Java so popular in NoSQL world.

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• Controling images of nodes in a TreeView (C#)

  - by ET

  Hi, I am pretty new with GUI, and I guess that is a silly question, but I am stuck... I am trying to make a folder explorer using TreeView control. now, I added an ImageList with two images - one for a folder and the other for selected folder. I used the 'BeforeExpand' event to change the icon of the current node (folder). The problem is that I dont know how to change it back when the user selects other folder... what event can I use? Maybe I dont use it right... ? Thanks guys :)

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• Can it be a good idea to create a new table for each client of a webapp?

  - by Will

  This is semi-hypothetical, and as I've no experience in dealing with massive database tables, I have no idea if this is horrible for some reason. On to the situation: Imagine a web based application - lets say accounting software - which has 20,000 clients and each client has 1000+ entries in a table. That's 20 million rows which I know can certainly slow down complex queries. In a case like this, does it make more sense to create a new table in the database for each client? How do databases react to having 20k (or more!) tables?

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• can not find out if the div element is already set in body in chrome extension

  - by alpham8

  in my chrome extension I got an div, which I will add to the body of the current tab. I am listening to chrome.tabs.onUpdated. If this event is called, I execute a script inside content_scripts. In this function there I´ll wait till the document is ready with jQuery $(document).ready(...). I try to access $("#div").length and sometimes it returns 1 and sometimes 0. It should added to the body, if it´s not already there. For some strange reasons, the onUpdated event is called twice on each page reload. Actually I found no way to check safely if the div was already added.

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