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  • jQuery plugin to style objects

    - by Alex
    Hi. I've been looking at the various JavaScript UI libraries and am wondering if there's one that can add some styling to page elements. I'm currently adding rounded corners, shadows, borders, and gradients via my own CSS + hacks to get it working on IE. I'm using jQuery for a number of tasks and wondered if there's a plugin that can add these design flairs more easily to DIVs. Not that you want to go overboard with this stuff, but when you need to use it, you'd like to depend on cross-browser and tried-and-tested solutions. Thanks.

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  • Mathematica Programming Language&ndash;An Introduction

    - by JoshReuben
    The Mathematica http://www.wolfram.com/mathematica/ programming model consists of a kernel computation engine (or grid of such engines) and a front-end of notebook instances that communicate with the kernel throughout a session. The programming model of Mathematica is incredibly rich & powerful – besides numeric calculations, it supports symbols (eg Pi, I, E) and control flow logic.   obviously I could use this as a simple calculator: 5 * 10 --> 50 but this language is much more than that!   for example, I could use control flow logic & setup a simple infinite loop: x=1; While [x>0, x=x,x+1] Different brackets have different purposes: square brackets for function arguments:  Cos[x] round brackets for grouping: (1+2)*3 curly brackets for lists: {1,2,3,4} The power of Mathematica (as opposed to say Matlab) is that it gives exact symbolic answers instead of a rounded numeric approximation (unless you request it):   Mathematica lets you define scoped variables (symbols): a=1; b=2; c=a+b --> 5 these variables can contain symbolic values – you can think of these as partially computed functions:   use Clear[x] or Remove[x] to zero or dereference a variable.   To compute a numerical approximation to n significant digits (default n=6), use N[x,n] or the //N prefix: Pi //N -->3.14159 N[Pi,50] --> 3.1415926535897932384626433832795028841971693993751 The kernel uses % to reference the lastcalculation result, %% the 2nd last, %%% the 3rd last etc –> clearer statements: eg instead of: Sqrt[Pi+Sqrt[Sqrt[Pi+Sqrt[Pi]]] do: Sqrt[Pi]; Sqrt[Pi+%]; Sqrt[Pi+%] The help system supports wildcards, so I can search for functions like so: ?Inv* Mathematica supports some very powerful programming constructs and a rich function library that allow you to do things that you would have to write allot of code for in a language like C++.   the Factor function – factorization: Factor[x^3 – 6*x^2 +11x – 6] --> (-3+x) (-2+x) (-1+x)   the Solve function – find the roots of an equation: Solve[x^3 – 2x + 1 == 0] -->   the Expand function – express (1+x)^10 in polynomial form: Expand[(1+x)^10] --> 1+10x+45x^2+120x^3+210x^4+252x^5+210x^6+120x^7+45x^8+10x^9+x^10 the Prime function – what is the 1000th prime? Prime[1000] -->7919 Mathematica also has some powerful graphics capabilities:   the Plot function – plot the graph of y=Sin x in a single period: Plot[Sin[x], {x,0,2*Pi}] you can also plot 3D surfaces of functions using Plot3D function

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  • mysql completely removing

    - by Dmitry Teplyakov
    I broke my mysql and now I want to completely reinstall it. I tried: $ sudo apt-get install --reinstall mysql-server $ sudo apt-get remove --purge mysql-client mysql-server But always I see popup with proposal to change root password, I change it and got an error that I can change it.. $ sudo apt-get remove --purge mysql-client mysql-server Reading package lists... Done Building dependency tree Reading state information... Done Package mysql-client is not installed, so not removed Package mysql-server is not installed, so not removed The following packages were automatically installed and are no longer required: libmygpo-qt1 libqtscript4-network libqtscript4-gui libtag-extras1 libqtscript4-sql libqtscript4-xml amarok-utils amarok-common libqtscript4-uitools liblastfm0 libloudmouth1-0 libqtscript4-core Use 'apt-get autoremove' to remove them. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Setting up mysql-server-5.5 (5.5.28-0ubuntu0.12.04.2) ... 121114 19:04:03 [Note] Plugin 'FEDERATED' is disabled. 121114 19:04:03 InnoDB: The InnoDB memory heap is disabled 121114 19:04:03 InnoDB: Mutexes and rw_locks use GCC atomic builtins 121114 19:04:03 InnoDB: Compressed tables use zlib 1.2.3.4 121114 19:04:03 InnoDB: Initializing buffer pool, size = 128.0M 121114 19:04:03 InnoDB: Completed initialization of buffer pool InnoDB: Error: auto-extending data file ./ibdata1 is of a different size InnoDB: 0 pages (rounded down to MB) than specified in the .cnf file: InnoDB: initial 640 pages, max 0 (relevant if non-zero) pages! 121114 19:04:03 InnoDB: Could not open or create data files. 121114 19:04:03 InnoDB: If you tried to add new data files, and it failed here, 121114 19:04:03 InnoDB: you should now edit innodb_data_file_path in my.cnf back 121114 19:04:03 InnoDB: to what it was, and remove the new ibdata files InnoDB created 121114 19:04:03 InnoDB: in this failed attempt. InnoDB only wrote those files full of 121114 19:04:03 InnoDB: zeros, but did not yet use them in any way. But be careful: do not 121114 19:04:03 InnoDB: remove old data files which contain your precious data! 121114 19:04:03 [ERROR] Plugin 'InnoDB' init function returned error. 121114 19:04:03 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed. 121114 19:04:03 [ERROR] Unknown/unsupported storage engine: InnoDB 121114 19:04:03 [ERROR] Aborting 121114 19:04:03 [Note] /usr/sbin/mysqld: Shutdown complete start: Job failed to start invoke-rc.d: initscript mysql, action "start" failed. dpkg: error processing mysql-server-5.5 (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: mysql-server-5.5 E: Sub-process /usr/bin/dpkg returned an error code (1) It is good for me that I have not any important databases, but..

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  • Database Developer - October 2013 issue: Download Database 12c and related products

    - by Javier Puerta
    The October issue of the Database Application Developer  newsletter is now available. The focus of this issue is on downloads of Database 12c and related products. (Full newsletter here) Get Ready to Download, Deploy and Develop for Oracle Database 12c This month we're focused on downloads. We've rounded up the top developer releases (both early adopter and BETA releases) and the articles that will help you do more with Oracle 12c. See the technical content that will help you get started. If you're ready...Away we go! — Laura Ramsey, Database and Developer Community, Oracle Technology Network Team FEATURED DOWNLOADS Download: Oracle Database 12c According Tom Kyte, the Oracle 12c version has some of the biggest enhancements to the core database since version 6 - Check it out for yourself. Download: Oracle SQL Developer 4.0 Early Adopter 2 is Here Oracle SQL Developer is a free IDE that simplifies the development and management of Oracle Database. It is a complete end-to-end development platform for your PL/SQL applications that features a worksheet for running queries and scripts, a DBA console for managing the database, a reports interface, a complete data modeling solution and a migration platform for moving your 3rd party databases to Oracle.  If you are interested in checking out this new early adopter version,Oracle SQL Developer 4.0 EA is the place to go. Download: Oracle 12c Multitenant Self Provisioning Application -BETA- The -BETA- is here. The Multitenant self provisioning Application is an easy and productive way for DBAs and Developers to get familiar with powerful PDB features including create, clone, plug and unplug.   No better time to start playing with PDBs. Oracle 12c Multitenant Self Provisioning Application. Download: New! Updates to Oracle Data Integration Portfolio Oracle GoldenGate 12c and Oracle Data Integrator 12c is now available. From Real-Time data integration, transactional change data capture, data replication, transformations....to hi-volume, high-performance batch loads, event-driven, trickle-feed integration process..its now available. Go here all the details and links to downloads...and Congratulations Data Integration Team!. Download: Oracle VM Templates for Oracle 12c Features Support for Single Instance, Oracle Restart and Oracle RAC Support for all current Oracle Database 11.2 versions as well as Oracle 12c on Oracle Linux 5 Update 9 & Oracle Linux 6 Update 4. The Oracle 12c templates allow end-to-end automation for Flex Cluster, Flex ASM and PDBs. See how the Deploycluster tool was updated to support Single Instance and the new Oracle 12c features. Oracle VM Templates for Oracle Database. Download: Oracle SQL Developer Data Modeler 4.0 EA 3 If you're looking for a datamodeling and database design tool that provides an environment for capturing, modeling, managing and exploiting metadata, it's time to check out Oracle SQL Developer Data Modeler. Oracle SQL Developer Data Modeler 4.0 EA V3 is here.

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  • Database Developer - October 2013 issue: Download Database 12c and related products

    - by Javier Puerta
    The October issue of the Database Application Developer  newsletter is now available. The focus of this issue is on downloads of Database 12c and related products. (Full newsletter here) Get Ready to Download, Deploy and Develop for Oracle Database 12c This month we're focused on downloads. We've rounded up the top developer releases (both early adopter and BETA releases) and the articles that will help you do more with Oracle 12c. See the technical content that will help you get started. If you're ready...Away we go! — Laura Ramsey, Database and Developer Community, Oracle Technology Network Team FEATURED DOWNLOADS Download: Oracle Database 12c According Tom Kyte, the Oracle 12c version has some of the biggest enhancements to the core database since version 6 - Check it out for yourself. Download: Oracle SQL Developer 4.0 Early Adopter 2 is Here Oracle SQL Developer is a free IDE that simplifies the development and management of Oracle Database. It is a complete end-to-end development platform for your PL/SQL applications that features a worksheet for running queries and scripts, a DBA console for managing the database, a reports interface, a complete data modeling solution and a migration platform for moving your 3rd party databases to Oracle.  If you are interested in checking out this new early adopter version,Oracle SQL Developer 4.0 EA is the place to go. Download: Oracle 12c Multitenant Self Provisioning Application -BETA- The -BETA- is here. The Multitenant self provisioning Application is an easy and productive way for DBAs and Developers to get familiar with powerful PDB features including create, clone, plug and unplug.   No better time to start playing with PDBs. Oracle 12c Multitenant Self Provisioning Application. Download: New! Updates to Oracle Data Integration Portfolio Oracle GoldenGate 12c and Oracle Data Integrator 12c is now available. From Real-Time data integration, transactional change data capture, data replication, transformations....to hi-volume, high-performance batch loads, event-driven, trickle-feed integration process..its now available. Go here all the details and links to downloads...and Congratulations Data Integration Team!. Download: Oracle VM Templates for Oracle 12c Features Support for Single Instance, Oracle Restart and Oracle RAC Support for all current Oracle Database 11.2 versions as well as Oracle 12c on Oracle Linux 5 Update 9 & Oracle Linux 6 Update 4. The Oracle 12c templates allow end-to-end automation for Flex Cluster, Flex ASM and PDBs. See how the Deploycluster tool was updated to support Single Instance and the new Oracle 12c features. Oracle VM Templates for Oracle Database. Download: Oracle SQL Developer Data Modeler 4.0 EA 3 If you're looking for a datamodeling and database design tool that provides an environment for capturing, modeling, managing and exploiting metadata, it's time to check out Oracle SQL Developer Data Modeler. Oracle SQL Developer Data Modeler 4.0 EA V3 is here.

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  • SQL Saturday 194 - Exeter

    - by Dave Ballantyne
    Many kudos goes to Jonathan and Annette Allen and the others on the team for confirming SQL Saturday 194 in Exeter on the 8th and 9th of March.  The event home page is here http://www.sqlsaturday.com/194/eventhome.aspx and I delighted that myself and Dave Morrison will be presenting a full day pre-con on the 8th on favourite subjects “TSQL and Internals”. Here is the full abstract : TSQL and internals - When faced with performance issues there are many lines of attack. Tuning the engine itself can get you so far, however for maximum effect you need to understand how the engine and how it translates SQL statements into performable actions. This is not a simple task, it is a massive task to deal with a multi-table join and the number of permutations can be immense. To back up this knowledge, we can create better performing TSQL and understand the impact that is has upon the engine and recognize the pitfalls and gotcha’s that exist in SQLServer. Ultimately, there is no ‘best way’ to perform a single task only many variations of ‘it depends’ , but now we can pick the most appropriate option for the required dataload. Over the years, there have been many myths and misconceptions have grown around the product, some have basis in older versions and some are just wrong. Continuing to build on the knowledge given so far these issue will be explored and broken down and proved or disproved. Finally we will look to the future and explore SQL Server 2012 and the new functionality that that brings and some of the common uses that we will be able to address. After completion of this days pre-con, attendees will have a more complete knowledge of execution plans, and how they relate to the physical and logical actions that SQLServer will be executing on their behalf. The attendees will also have a more rounded and fuller knowledge of TSQL and the implications of incorrectly defining a query. Dave is a fountain of knowledge on execution plans and optimizer internals and ,though i may flatter myself, I’m no shrinking violet when it comes to TSQL and such matters.  I hope that if you cant join us, then there are other pre-cons available from other experts in their fields that may ‘float you boat’ too.  The pre-con page is http://sqlsouthwest.co.uk/SQLSaturday_precon.htm Also, excitingly, this pre-con day is sponsored by Fusion-IO which is a great boon for the day. If you want a more of this then i am offering a 2 day TSQL course starting on the 19th of March. More details on this are available here

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  • Point line collision reaction

    - by user4523
    I am trying to program point line segment collision detection and reaction. I am doing this for fun and to learn. The point moves (it has a velocity, and can be controlled by the user), whilst the lines are strait and stationary. The lines are not axis aligned. Everything is in 2D. It is quite straight forward to work out if a collision has occurred. For each frame, the point moves from A to B. AB is a line, and if it crosses the line segment, a collision has occurred (or will occur) and I am able to work out the point of intersection (poi). The problem I am having is with the reaction. Ideally I would like the point to be prevented from moving across the line. In one frame, I can move the point back to the poi (or only alow it to move as far as the poi), and alter the velocity. The problem I am having with this approach (I think) is that, next frame the user may try to cross the line again. Although the point is on the poi, the point may not be exactly on the line. Since it is not axis aligned, I think there is always some subtle rounding issue (A float representation of a point on a line might be rounded to a point that is slightly on one side or the other). Because of this, next frame the path might not intersect the line (because it can start on the other side and move away from it) and the point is effectively allowed to cross the line. Firstly, does the analysis sound correct? Having accepted (maybe) that I cannot always exactly position the point on the line, I tried to move the point away from the line slightly (either along the normal to the line, or along the path vector). I then get a problem at edges. Attempting to fix one collision by moving the point away from the line (even slightly) can cause it to cross another line (one shape I am dealing with is a star, with sharp corners). This can mean that the solution to one collision inadvertently creates another collision, which is ignored. Again, does this sound correct? Anyway, whatever I try, I am having difficulty with edges, and the point is occasionally able to penetrate the polygons and cross lines, which is undesirable. Whilst I can find a lot of information about collision detection on the web (and on this site) I can find precious little information on collision reaction. Does any one know of any good point line collision reaction tutorials? Or is my approach too flawed/over complicated?

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  • How can I get VirtualBox to run at 1366x768?

    - by Joe White
    I'm trying to run Windows 8 in VirtualBox. My laptop's display is exactly 1366x768. Windows 8 disables some of its features if the resolution is less than 1366x768, so I need to run the guest OS fullscreen. The problem is, VirtualBox refuses to run the guest at 1366x768. When VirtualBox is "fullscreen", the guest is only 1360x768 -- six pixels too narrow. So there's a three-pixel black bar at the left and right sides of the display. This user had the same problem, but the accepted answer is "install the Guest Additions", which I've already done; that got me to 1360, but not to 1366. According to the VirtualBox ticket tracker, there used to be a bug where the guest's screen width would be rounded down to the nearest multiple of 8, but they claim to have fixed the bug in version 3.2.12. I'm using version 4.1.18 and seeing the same problem they claim to have fixed, so either they broke it again, they were wrong about ever having fixed it, or my problem is something else entirely. This answer suggested giving the VM 128MB of video memory, and claimed no problems getting 1366x768 afterward. When I created the VM, its display memory was already defaulted to 128 MB. I tried increasing it to 256MB, but with no effect: the guest is still six pixels too narrow. My host OS is Windows 7 64-bit, and I'm running VirtualBox 4.1.18. How can I get VirtualBox to run my guest OS fullscreen at my display's native resolution of 1366x768?

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  • Discrepancy in file size on disk and ls output

    - by smokinguns
    I have a script that checks for gzipped file sizes greater than 1MB and outputs files along with their sizes as a report. This is the code: myReport=`ls -ltrh "$somePath" | egrep '\.gz$' | awk '{print $9,"=>",$5}'` # Count files that exceed 1MB oversizeFiles=`find "$somePath" -maxdepth 1 -size +1M -iname "*.gz" -print0 | xargs -0 ls -lh | wc -l` if [ $oversizeFiles -eq 0 ];then status="PASS" else status="CHECK FAILED. FOUND FILES GREATER THAN 1MB" fi echo -e $status"\n"$myReport The problem is that ls command outputs the files sizes as 1.0MB in the report but the status is "FAIL" as "$oversizeFiles" variable's value is 2. I checked the file sizes on disk and 2 files are 1.1MB. Why this discrepancy? How should I modify the script so that I can generate an accurate report? BTW, I'm on a Mac. Here is what man page for "find" says on my Mac OSX: -size n[ckMGTP] True if the file's size, rounded up, in 512-byte blocks is n. If n is followed by a c,then the primary is true if the file's size is n bytes (characters). Similarly if n is followed by a scale indicator then the file's size is compared to n scaled as: k kilobytes (1024 bytes) M megabytes (1024 kilobytes) G gigabytes (1024 megabytes) T terabytes (1024 gigabytes) P petabytes (1024 terabytes)

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  • Integrating PayMill: The token filled input field is not created, error "field_invalid_amount"

    - by automatix
    I'm implementing the Credit Card Payment form of PayMill according to the Payment Form docu. So I copied the JS from the Bridge docu page and the form from the Payment Form docu page. But no token is created. When I try to debug the JS and add console.info(error.apierror); into the paymillResponseHandler(...) function, I get the error code: field_invalid_amount. According to the support page There are three possible reasons for this error message: no amount value was provided numbers were rounded wrong delimiter symbol But the amuont is provided and I've already tried different delimiter symbols. What "numbers were rounded" means, is not clear. What can be the problem and how to fix this issue? Code: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta name="generator" content="PSPad editor, www.pspad.com"> <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script> <title> </title> </head> <body> <!-- PayMill HEAD start --> <link rel="stylesheet" href="https://netdna.bootstrapcdn.com/twitter-bootstrap/2.2.1/css/bootstrap.no-responsive.no-icons.min.css" /> <script type="text/javascript"> var PAYMILL_PUBLIC_KEY = '51668632777bf03b57f861c5a7278a38'; </script> <script type="text/javascript" src="https://bridge.paymill.com/"></script> <!-- PayMill HEAD stop --> <!-- PayMill FORM start --> <form id="payment-form" class="span4" action="payment.php" method="POST"> <p class="payment-errors alert-error span3" style="display:none;"> </p> <div id="payment-form-cc"> <div class="controls controls-row"> <div class="span2"> <label class="card-number-label">Kreditkarte </label> <input class="card-number span2" type="text" size="20" value="4111111111111111"/> </div> <div class="span1"> <label class="card-cvc-label">CVC </label> <input class="card-cvc span1" type="text" size="4" value="111"/> </div> </div> <div class="controls controls-row"> <div class="span3 card-icon"> </div> </div> <div class="controls controls-row"> <div class="span3"> <label class="card-holdername-label">Karteninhaber </label> <input class="card-holdername span3" type="text" size="20" value="lala"/> </div> </div> <div class="controls controls-row"> <div class="span3"> <label class="card-expiry-label">Gültigkeitsdatum (MM/YYYY) </label> <input class="card-expiry-month span1" type="text" size="2" value="12"/> <span style="float:left;"> / </span> <input class="card-expiry-year span1" type="text" size="4" value="2015"/> </div> </div> </div> <div class="controls controls-row"> <div class="span2"> <label class="amount-label">Betrag </label> <input class="amount span2" type="text" size="5" value="9,99" name="amount"/> </div> <div class="span1"> <label class="currency-label">Währung </label> <input class="currency span1" type="text" size="3" value="EUR" name="currency"/> </div> </div> <div class="controls controls-row"> <div class="span4"> <button class="submit-button btn btn-primary" type="submit" >Pay!</button> </div> </div> </form> <!-- PayMill FORM stop --> <!-- PayMill FOOT start --> <script type="text/javascript"> function paymillResponseHandler(error, result) { if (error) { console.info(error.apierror); // Displays the error above the form $(".payment-errors").text(error.apierror); } else { console.info('OK'); var form = $("#payment-form"); // Output token var token = result.token; // Insert token into form in order to submit to server form.append( "<input type='hidden' name='paymillToken' value='"+token+"'/>" ); // Submit form form.get(0).submit(); } } </script> <script type="text/javascript"> paymill.createToken({ number: $('.card-number').val(), // required exp_month: $('.card-expiry-month').val(), // required exp_year: $('.card-expiry-year').val(), // required cvc: $('.card-cvc').val(), // required amount_int: $('.card-amount-int').val(), // required, e.g. "4900" for 49.00 EUR currency: $('.currency').val(), // required cardholder: $('.card-holdername').val() // optional }, paymillResponseHandler); </script> <!-- PayMill FOOT stop --> </body> </html>

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  • How * tag can be used in CSS?

    - by php html
    I'm trying to understand how a background image is used in a css button. It seems the image is much larger than the button, still the corners are matched to the button(resulting a rounded corner button). It seems it is related to .btn *. I couldn't find any reference about how * can be used. Can you explain how the image is rendered in the button, using the * tag? I assume * will match any element. However I don't get it how in this case the image is rendered like this. .btn { display: block; position: relative; background: #aaa; padding: 5px; float: left; color: #fff; text-decoration: none; cursor: pointer; } .btn * { font-style: normal; background-image: url(btn2.png); background-repeat: no-repeat; display: block; position: relative; } full example here: http://monc.se/kitchen/59/scalable-css-buttons-using-png-and-background-colors/

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  • How to delete row in TTTableViewController (Three20)

    - by Dmitry
    Hi, The Three20 is great library. It's making the work with tables very easy. But one gap that I noticed - is deletion of rows, with animation. I spent many hours trying to do this, and this is what I'm doing: // get current index patch UITableView* table = [super tableView]; NSIndexPath *indexPath = [table indexPathForSelectedRow]; //delete row in data source TTListDataSource * source = (TTListDataSource *)self.dataSource; [source.items removeObjectAtIndex:indexPath.row]; // delete row from the table, with animation [table deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; After this code runs the error appears: [NSCFArray objectAtIndex:]: index (0) beyond bounds (0) I'm using the class inherited from the TTTableViewController. And I doesn't implement the DataSourceDelegate or TableViewDelegate because I'm using the Three20 as much as possible. So, this is how I create datasource: for(NSDictionary *album in (NSArray *)albums){ TTTableRightImageItem *item = [TTTableRightImageItem itemWithText:@"name" imageURL:@"image url" defaultImage:nil imageStyle:TTSTYLE(rounded) URL:@"url of selector where I actually catch the tap on a row"]; [tableItems addObject:item]; } self.dataSource = [TTListDataSource dataSourceWithItems:tableItems]; I read this article (article) but it doesn't help :( So, I know that this is very simple for gurus from this site. Can you just give me advanced sample of how to do this Thanks

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  • How to change the border color of a Grouped UITableView

    - by ctpenrose
    This concerns iPhoneOS-sdk-3.2 I am having difficulty changing the border color of a grouped UITableView. I can change the cell background color, separator color, text color, quite easily now, and the rounded corners clip correctly, even when highlighted with whatever colors I have chosen. However the surrounding border remains infuriatingly gray despite many different attempts. I have read all of the related posts I can find via Google, let alone stackoverflow. I have tried both a programmatic and xib-based solution and both provide the same results. I will share the programmatic version below: I have a UIViewController subclass rather than a UITableViewController subclass to act as a UITableView delegate -- I chose this route as I am coding on the iPad and UITableViewController reportedly takes over the whole screen. loadView method of my UIViewController subclass: - (void) loadView { self.view = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; [self.view release]; self.view.backgroundColor = [UIColor blackColor]; // add and configure UITableView CGRect tableViewRect = CGRectMake(0., 0., 256., 768.); myTableView = [[UITableView alloc] initWithFrame:tableViewRect style:UITableViewStyleGrouped]; // set the tableview delegate to this object and the datasource to the datasource which has already been set myTableView.delegate = self; myTableView.dataSource = self; myTableView.sectionIndexMinimumDisplayRowCount=1; myTableView.backgroundColor = [UIColor clearColor]; myTableView.separatorColor = [UIColor whiteColor]; myTableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine; myTableView.opaque = NO; // add the table view to our background view [self.view addSubview:myTableView]; [myTableView release]; }

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  • Ruby BigDecimal Round: Is this an error?

    - by peterdp
    While writing a test with a value that gets represented as a BigDecimal, I ran into something weird and decided to dig into it. In brief, '0.00009' when rounded to two decimal places is returned as 0.01 instead of 0.00. Really. Here's my script/console capture: >> bp = BigDecimal('0.09') => #<BigDecimal:210fe08,'0.9E-1',4(8)> >> bp.round(2,BigDecimal::ROUND_HALF_DOWN).to_f => 0.09 >> bp = BigDecimal('0.009') => #<BigDecimal:210bcf4,'0.9E-2',4(8)> >> bp.round(2,BigDecimal::ROUND_HALF_DOWN).to_f => 0.01 >> bp = BigDecimal('0.0009') => #<BigDecimal:2107a8c,'0.9E-3',4(12)> >> bp.round(2,BigDecimal::ROUND_HALF_DOWN).to_f => 0.0 >> bp = BigDecimal('0.00009') => #<BigDecimal:2103428,'0.9E-4',4(12)> >> bp.round(2,BigDecimal::ROUND_HALF_DOWN).to_f => 0.01 >> bp = BigDecimal('0.000009') => #<BigDecimal:20ff0f8,'0.9E-5',4(12)> >> bp.round(2,BigDecimal::ROUND_HALF_DOWN).to_f => 0.0 Oh, and I get the same results if I use the default mode, like so: >> bd = BigDecimal('0.00009') => #<BigDecimal:2152ed8,'0.9E-4',4(12)> >> bd.round(2).to_f => 0.01 Here are my versions: ruby 1.8.6 (2008-03-03 patchlevel 114) [i686-darwin9.2.2] Rails 2.3.4 Has anyone seen anything like this?

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  • iPhone SDK: Rendering a CGLayer into an image object

    - by codemercenary
    Hi all, I am trying to add a curved border around an image downloaded and to be displayed in a UITableViewCell. In the large view (ie one image on the screen) I have the following: productImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:product.image]]; [productImageView setAlpha:0.4]; productImageView.frame = CGRectMake(10.0, 30.0, 128.0, 128.0); CALayer *roundedlayer = [productImageView layer]; [roundedlayer setMasksToBounds:YES]; [roundedlayer setCornerRadius:7.0]; [roundedlayer setBorderWidth:2.0]; [roundedlayer setBorderColor:[[UIColor darkGrayColor] CGColor]]; [self addSubview:productImageView]; In the table view cell, to get it to scroll fast, an image needs to be drawn in the drawRect method of a UIView which is then added to a custom cell. so in drawRect - (void)drawRect:(CGRect)rect { ... point = CGPointMake(boundsX + LEFT_COLUMN_OFFSET, UPPER_ROW_TOP); //CALayer *roundedlayer = [productImageView layer]; //[roundedlayer setMasksToBounds:YES]; //[roundedlayer setCornerRadius:7.0]; //[roundedlayer setBorderWidth:2.0]; //[roundedlayer setBorderColor:[[UIColor darkGrayColor] CGColor]]; //[productImageView drawRect:CGRectMake(boundsX + LEFT_COLUMN_OFFSET, UPPER_ROW_TOP, IMAGE_WIDTH, IMAGE_HEIGHT)]; // [productImageView.image drawInRect:CGRectMake(boundsX + LEFT_COLUMN_OFFSET, UPPER_ROW_TOP, IMAGE_WIDTH, IMAGE_HEIGHT)]; So this works well, but if I remove the comment and try to show the rounded CA layer the scrolling goes really slow. To fix this I suppose I would have to render this image context into a different image object, and store this in an array, then set this image as something like: productImageView.image = (UIImage*)[imageArray objectAtIndex:indexPath.row]; My question is "How do I render this layer into an image?" TIA.

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  • CSS sliding door background image problem.

    - by ethyreal
    I noticed I am not the first to ask about CSS sliding doors. However this seems (at least to me) to be a rather odd problem which I have not seen an answer for. Trying to create a simple rounded corner link button: html: <a href="#" class="link_button"><span>Add A New Somthing</span></a> css: .link_button { background: transparent url('img/backgrounds/bg-buttonRight.png') no-repeat scroll top right; color: #444; display: block; float: left; font: normal 12px arial; height: 41px; margin-right: 6px; padding-right: 14px; text-decoration: none; } .link_button span { background: transparent url('img/backgrounds/bg-buttonLeft.png') no-repeat top left; display: block; line-height: 31px; padding: 5px 0 5px 14px; } .link_button:active { background-position: bottom right; color: #000; outline: none; } .link_button:active span { background-position: bottom left; padding: 6px 0 4px 18px; } results: The two images are overlapping, which is what I want, but why the discoloration? Why would one be darker? I tried using png jpg, gif, with and without transparency. I posted the code here, along with another attempt using only one jpg instead of two, but still the same results. Did I miss something? Thanks in advance.

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  • Milliseconds in DateTime.Now on .NET Compact Framework always zero? [SOLVED]

    - by Marcel
    Hi all, i want to have a time stamp for logs on a Windows Mobile project. The accuracy must be in the range a hundred milliseconds at least. However my call to DateTime.Now returns a DateTime object with the Millisecond property set to zero. Also the Ticks property is rounded accordingly. How to get better time accuracy? Remember, that my code runs on on the Compact Framework, version 3.5. I use a HTC touch Pro 2 device. Based on the answer from MusiGenesis i have created the following class which solved this problem: /// <summary> /// A more precisely implementation of some DateTime properties on mobile devices. /// </summary> /// <devdoc>Tested on a HTC Touch Pro2.</devdoc> public static class DateTimePrecisely { /// <summary> /// Remembers the start time when this model was created. /// </summary> private static DateTime _start = DateTime.Now; /// <summary> /// Remembers the system uptime ticks when this model was created. This /// serves as a more precise time provider as DateTime.Now can do. /// </summary> private static int _startTick = Environment.TickCount; /// <summary> /// Gets a DateTime object that is set exactly to the current date and time on this computer, expressed as the local time. /// </summary> /// <returns></returns> public static DateTime Now { get { return _start.AddMilliseconds(Environment.TickCount - _startTick); } } }

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  • Pixel Perfect Collision Detection in HTML5 Canvas

    - by Armin Ronacher
    Hi, I want to check a collision between two Sprites in HTML5 canvas. So for the sake of the discussion, let's assume that both sprites are IMG objects and a collision means that the alpha channel is not 0. Now both of these sprites can have a rotation around the object's center but no other transformation in case this makes this any easier. Now the obvious solution I came up with would be this: calculate the transformation matrix for both figure out a rough estimation of the area where the code should test (like offset of both + calculated extra space for the rotation) for all the pixels in the intersecting rectangle, transform the coordinate and test the image at the calculated position (rounded to nearest neighbor) for the alpha channel. Then abort on first hit. The problem I see with that is that a) there are no matrix classes in JavaScript which means I have to do that in JavaScript which could be quite slow, I have to test for collisions every frame which makes this pretty expensive. Furthermore I have to replicate something I already have to do on drawing (or what canvas does for me, setting up the matrices). I wonder if I'm missing anything here and if there is an easier solution for collision detection.

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  • Fill 2D area bound by vertices in XNA

    - by oakskc
    I'm learning XNA by doing and, as the title states, I'm trying to see if there's a way to fill a 2D area that is defined by a collection of vertices on a plane. I want to fill with a color, not a file-based texture. For an example, take a rounded rectangle whose vertices are defined by four quarter-circle triangle fans. The vertices are defined by building a collection of triangles, but the triangles may not be adjacent. Additionally, I would like to fill it with more than a single color -- i.e. divide the bound area into four vertical bands and have each a different color. You don't have to provide me the code, pointing me towards resources will help a great deal. I can be handy with Google (which I did try first, but have failed miserably). This is as much an exploration into "what's appropriate for XNA" as it is the implementation of it. Being pretty new to XNA, I'm wanting to also learn what should and shouldn't be done on top of what can and can't be done.

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  • fill combobox value in datagridview based on other combobox in datagridview

    - by Purohit Raghu
    I m creating Web Application..in C# I have One Data grid view In that i Have 2 Combo box i m trying 2 bind second combo box based on first combo-box. in First Combo-box I have value Shirt,T shirt so i want if shirt is selected than second combo-box should have value Slim,Regular..and if T shirt Is selected than second Combo-box should have V neck and rounded color. i have different table for thirst and shirt type... I work fine for first time but when i goes on second row and change the combo box value than it will also change value of second combo box value of previous row as well .. Where i need to change to prevent change in upper row i have following code private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e) { if (dataGridView1.CurrentCell.ColumnIndex == 0) { ComboBox cbx = e.Control as ComboBox; cbx.SelectionChangeCommitted -= new EventHandler(cbx_SelectionChangeCommitted); cbx.SelectionChangeCommitted += new EventHandler(cbx_SelectionChangeCommitted); } } private void cbx_SelectionChangeCommitted(object sender, EventArgs e) { int selectedIndex = ((ComboBox)sender).SelectedIndex; if (selectedIndex == 1) //this condition is true if i have selected shirt from combobox1 { ShirtType(); } if (selectedIndex == 2) { Tshirtype(); } } void ShirtType() { try { string str; str = "select ShirtType_name,ShirtType_Id from ShirtType_master"; ds = new DataSet(); ds = cn.readdata(str); Type.DataSource = ds.Tables[0];//Type is Combobox name of Second Combobox Type.DisplayMember = ds.Tables[0].Columns[0].ToString(); ; Type.ValueMember = ds.Tables[0].Columns[1].ToString(); ; } catch (Exception ee) { } } void Tshirtype() { try { string str; str = "select TShirtType_name,TshirtType_Id from TshirtType_Master"; ds = new DataSet(); ds = cn.readdata(str); Type.DataSource = ds.Tables[0]; Type.DisplayMember = ds.Tables[0].Columns[0].ToString(); ; Type.ValueMember = ds.Tables[0].Columns[1].ToString(); ; }

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  • Scrolling screen upward to expose TextView above keyboard

    - by Matt Winters
    I think I'm missing something obvious and would appreciate an answer. I have a view with a 2-section grouped tableView, each section having one row and a textView, the heights of the rows 335 and 140. This allows for a box with nicely rounded corners to type text into when the keyboard appears (140 height section) and when the keyboard is dismissed, a nice box to read more text (notes); most of the time, use is without the keyboard. I also added a toolbar at the bottom of the screen to scroll up above the keyboard. A button on the toolbar dismisses the keyboard. This last part works fine with the keyboard going up and down using a notification and the following code in a keyboardWillShow method: [UIView beginAnimations:@"showKeyboardAnimation" context:nil]; [UIView setAnimationDuration:0.50]; self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y, self.view.frame.size.width, self.view.frame.size.height - 216); [UIView commitAnimations]; But with the above code, the 2 sections of the tableView remain unscrolled, only the toolbar and the keyboard move. With the following code (found both in previous posts), both the toolbar and the tableView sections move. [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.50]; CGRect rect = self.view.frame; rect.origin.y -= 216; self.view.frame = rect; [UIView commitAnimations]; Now I know that I have to tweak the numbers to get the everything as I want it but my first question is what is substantively different between the 2 sets of code that the sections move in the 2nd but not in the 1st? The toolbar also moves with the 2nd code. The second question is, am I going to be able to scroll the smaller height section from off the screen to above the keyboard while at the same time moving the toolbar up just 216? Thanks

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  • Fastest Method to Learn Web Design for a Developer

    - by hekevintran
    I am a Web developer and in my projects I have noticed that my weakest point is not being good at the front-end design. Relying on other designers can be annoying if they are not able to produce as quickly as I want. My perspective on HTML/CSS is that it is basically a big hack that amazingly works. There are too many CSS and browser specific bugs/quirks to learn and remember them all without spending extreme amounts of time trying to untangle everything. Is there a fast track route to getting CSS into my brain? I have looked at some CSS books, but to me they really read as long lists of how to render things correctly in IE6 and how to make corners rounded. (Seriously why does it require so many tricks to make a sharp corner round? On any platform but the Web this would be called a major oversight.) Does there exist something that does the analogous to CSS that jQuery does for JavaScript? Using jQuery you don't need to know JavaScript well to make things that work. I am not interested in learning why IE6 does things in weird ways because I don't care about supporting it at all. I am more interested in a method of learning how to use CSS to do what I want without spending hours and hours reading obscure blogs.

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  • Floating point precision in Visual C++

    - by Luigi Giaccari
    HI, I am trying to use the robust predicates for computational geometry from Jonathan Richard Shewchuk. I am not a programmer, so I am not even sure of what I am saying, I may be doing some basic mistake. The point is the predicates should allow for precise aritmthetic with adaptive floating point precision. On my computer: Asus pro31/S (Core Due Centrino Processor) they do not work. The problem may stay in the fact the my computer may use some improvements in the floating point precision taht conflicts with the one used by Shewchuk. The author says: /* On some machines, the exact arithmetic routines might be defeated by the / / use of internal extended precision floating-point registers. Sometimes / / this problem can be fixed by defining certain values to be volatile, / / thus forcing them to be stored to memory and rounded off. This isn't / / a great solution, though, as it slows the arithmetic down. */ Now what I would like to know is that there is a way, maybe some compiler option, to turn off the internal extended precision floating-point registers. I really appriaciate your help

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  • What should every developer know about databases?

    - by Aaronaught
    Whether we like it or not, many if not most of us developers either regularly work with databases or may have to work with one someday. And considering the amount of misuse and abuse in the wild, and the volume of database-related questions that come up every day, it's fair to say that there are certain concepts that developers should know - even if they don't design or work with databases today. So: What are the important concepts that developers and other software professionals ought to know about databases? Guidelines for Responses: Keep your list short. One concept per answer is best. Be specific. "Data modelling" may be an important skill, but what does that mean precisely? Explain your rationale. Why is your concept important? Don't just say "use indexes." Don't fall into "best practices." Convince your audience to go learn more. Upvote answers you agree with. Read other people's answers first. One high-ranked answer is a more effective statement than two low-ranked ones. If you have more to add, either add a comment or reference the original. Don't downvote something just because it doesn't apply to you personally. We all work in different domains. The objective here is to provide direction for database novices to gain a well-founded, well-rounded understanding of database design and database-driven development, not to compete for the title of most-important.

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