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  • Change WPF Datagrid Row Color

    - by juergen d
    I have a WPF datagrid that is filled with an ObserverableCollection. Now I want to color the rows depending on the row content at the program start and if something changes during runtime. System.Windows.Controls.DataGrid areaDataGrid = ...; ObservableCollection<Area> areas; //adding items to areas collection areaDataGrid.ItemsSource = areas; areaDataGrid.Rows <-- Property not available. how to access rows here? CollectionView myCollectionView = (CollectionView)CollectionViewSource.GetDefaultView(areaDataGrid.Items); ((INotifyCollectionChanged)myCollectionView).CollectionChanged += new NotifyCollectionChangedEventHandler(areaDataGrid_Changed); ... void areaDataGrid_Changed(object sender, NotifyCollectionChangedEventArgs e) { //how to access changed row here? } How can I access the rows at start and runtime?

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  • Java iText Image position

    - by skowron-line
    I have: Image i = Image.getInstance("tabelka.png"); i.scalePercent(25, 25); for(int i=0; i<= 5; i++) { doc.add(i); content.moveTo(50, ??);////// <-------------- HOW TO CHECK THE Y POSITION content.showText("skowron-line"); } I want to set text on upper right corner of image. How do I do that? EIDT: After hours of thinkin i found dirty solution: Image img = Image.getInstance("tabelka.png"); img.scalePercent(25, 25); float start = x; for(int i =1; i<= 5; i++) { start = (x - (img.getHeight() * 0.25f) * i); } If U know better solution let me know.

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  • Getting caught in loops - R

    - by user334898
    I am looking at whether or not certain 'systems' for betting really do work as claimed, namely, that they have a positive expectation. One such system is based on the rebate on loss. You basically have a large master pot, say $1 million. Your bankroll for each game is $50k. The way it works, is as follows: 1) Start with $50k, always bet on banker 2) If you win, add the money to the master pot. Then play again with $50k. 3) If you lose(now you're at $30k) play till you either: (a) hit 0, you get a rebate of 10%. Begin playing again with $50k+5k=$55k. (b) If you win more than the initial bankroll, add the money to the master pot. Then play again with $50k. 4) Continue until you double the master pot. I just cant find an easy way of programming out the possible cases in R, since you can eventually go down an improbable path. For example, you start at 50k, lose 20, win 19, now you're at 49, now you lose 20, lose 20, now youre at 9, you either lose 9 and get back 5k or you win and this cycle continues until you either end up with more than 50k or hit 0 and get the rebate on the 50k and start again with $50k +5k. Here's some code i started, but i havent figured out a good way of handling the cases where you get stuck and keeping track of the number of games played. Thanks again for your help. Obviously, I understand you may be busy and not have time. p.loss <- .4462466 p.win <- .4585974 p.tie <- 1 - (p.win+p.loss) prob <- c(p.win,p.tie,p.loss) bet<-20 x <- c(19,0,-20) r <- 10 # rebate = 20% br.i <- 50 br<-200 #for(i in 1:100){ # cbr.i<-0 y <- sample(x,1,replace=T,prob) cbr.i<-y+br.i if(cbr.i > br.i){ br<-br+(cbr.i-br.i); cbr.i<-br.i; }else{ y <- sample(x,2,replace=T,prob); if( sum(y)< cbr.i ){ cbr.i<-br.i+(1/r)*br.i; br<-br-br.i} cbr.i<-y+ }else{ cbr.i<- sum(y) + cbr.i; }if(cbr.i <= bet){ y <- sample(x,1,replace=T,prob) if(abs(y)>cbr.i){ cbr.i<-br.i+(1/r)*br.i } }

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  • save state of external running program

    - by SuitUp
    Hi, my goal is to save state of running process and later start from this point. This is not necessary need to be state from this exact moment, let's say save after 5 seconds is good too. Problem is, i can't alter in code of this external program, i am even don't aware of it's architecture. I have resources to save whole program to disk from memory, but i need some tips, where to start. I can't use any VM like Virtual Box to save state of whole operating system, and program can be written in c++ or c or c#...

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  • Mirroring a portion of the screen to an external display (in OSX)

    - by Adam
    I would like to write a program that can mirror a portion of the main display into a new window. Ideally this new window could then be displayed on an external monitor. I have seen this uiltity for a flightsim that does this on a pc (a multifunction display extractor). MFDex http://trac2.assembla.com/lightnings..._x86_Setup.msi I have looked at screen magnifiers or vnc clients for ideas but I think I need to write something from scratch. I have tried to do some reading on osx programing but where do I start in terms of gaining access to the display? I somehow need to extract the graphics from a particular program. Is it best to go near the final output stage (the individual pixels sent to the display) or somewhere nearer the window management stage. Any ideas or pointers would be much appreciated. I just need somewhere to start from. Regards,

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  • Swing: How do I run a job from AWT thread, but after a window was layed out?

    - by java.is.for.desktop
    My complete GUI runs inside the AWT thread, because I start the main window using SwingUtilities.invokeAndWait(...). Now I have a JDialog which has just to display a JLabel, which indicates that a certain job is in progress, and close that dialog after the job was finished. The problem is: the label is not displayed. That job seems to be started before JDialog was fully layed-out. When I just let the dialog open without waiting for a job and closing, the label is displayed. The last thing the dialog does in its ctor is setVisible(true). Things such as revalidate(), repaint(), ... don't help either. Even when I start a thread for the monitored job, and wait for it using someThread.join() it doesn't help, because the current thread (which is the AWT thread) is blocked by join, I guess. Replacing JDialog with JFrame doesn't help either. So, is the concept wrong in general? Or can I manage it to do certain job after it is ensured that a JDialog (or JFrame) is fully layed-out? Simplified algorithm of what I'm trying to achieve: Create a subclass of JDialog Ensure that it and its contents are fully layed-out Start a process and wait for it to finish (threaded or not, doesn't matter) Close the dialog I managed to write a reproducible test case: EDIT Problem from an answer is now addressed: This use case does display the label, but it fails to close after the "simulated process", because of dialog's modality. import java.awt.*; import javax.swing.*; public class _DialogTest2 { public static void main(String[] args) throws Exception { SwingUtilities.invokeAndWait(new Runnable() { final JLabel jLabel = new JLabel("Please wait..."); @Override public void run() { JFrame myFrame = new JFrame("Main frame"); myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); myFrame.setSize(750, 500); myFrame.setLocationRelativeTo(null); myFrame.setVisible(true); JDialog d = new JDialog(myFrame, "I'm waiting"); d.setModalityType(Dialog.ModalityType.APPLICATION_MODAL); d.add(jLabel); d.setSize(300, 200); d.setLocationRelativeTo(null); d.setVisible(true); SwingUtilities.invokeLater(new Runnable() { @Override public void run() { try { Thread.sleep(3000); // simulate process jLabel.setText("Done"); } catch (InterruptedException ex) { } } }); d.setVisible(false); d.dispose(); myFrame.setVisible(false); myFrame.dispose(); } }); } }

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  • How to delete a row from a typed dataset and save it to a database?

    - by Zingam
    I am doing this as a small project to learn about disconnected and connected models in .NET 4.0 and SQL Server 2008 R2. I have three tables: Companies (PK CompanyID) Addresses (PK AddressID, FK CompanyID) ContactPersons (PK ContactPersonID, FK CompanyID) CompanyID is assigned manually by the users. The other IDs are auto-generated. Companies has a one-to-many relationship with ContactPerson. I have set any changes to cascade. I display all records in Companies in a DataGridView and when a row is clicked, the corresponding records in ContactPersons are displayed in a second DataGridView. I have successfully implemented updating and inserting new records but I completely fail in my attempts to delete rows and save the changes to the database. I us a typed dataset. If I use this: DataRow[] contactPersonRows = m_SoldaCompaniesFileDataSet.ContactPersons.Select("ContactPersonID = " + this.m_CurrentContactPerson.ContactPersonID); m_SoldaCompaniesFileDataSet.ContactPersons.Rows.Remove(contactPersonRows[0]); The records are displayed properly in the DataGridView but are not saved in the database later. If I use this: DataRow row = m_SoldaCompaniesFileDataSet.ContactPersons.Rows.Find(this.m_CurrentContactPerson.ContactPersonID); row.Delete(); The records are set but I get an exeception: DeletedRowInaccessibleException, when I try to refresh the DataGridView. The exception pop-s up in the auto-generated dataset.design file. I am pretty much stuck at this point since yesterday. I cannot find anything anywhere that remotely resembles my problem. And I cannot understand actually what is going on.

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  • UpdateModelFromDatabaseException when trying to add a table to Entity Framework model

    - by Agent_9191
    I'm running into a weird issue with Entity Framework in .NET 3.5 SP1 within Visual Studio 2008. I created a database with a few tables in SQL Server and then created the associated .edmx Entity Framework model and had no issues. I then created a new table in the database that has a foreign key to an existing table and needed to be added to the .edmx. So I opened the .edmx in Visual Studio and in the models right-clicked and chose "Update Model From Database...". I saw the new table in the "add" tab, so I checked it and clicked finish. However I get an error message with the following text: --------------------------- Microsoft Visual Studio --------------------------- An exception of type 'Microsoft.Data.Entity.Design.Model.Commands.UpdateModelFromDatabaseException' occurred while attempting to update from the database. The exception message is: 'Cannot update from the database. Cannot resolve the Name Target for ScalarProperty 'ID <==> CustomerID'.'. --------------------------- OK --------------------------- For reference, here's the tables seem to be the most pertinent to the error. CustomerPreferences already exists in the .edmx. Diets is the table that was added afterwards and trying to add to the .edmx. CREATE TABLE [dbo].[CustomerPreferences]( [ID] [uniqueidentifier] NOT NULL, [LastUpdatedTime] [datetime] NOT NULL, [LastUpdatedBy] [uniqueidentifier] NOT NULL, PRIMARY KEY CLUSTERED ( [ID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] CREATE TABLE [dbo].[Diets]( [ID] [uniqueidentifier] NOT NULL, [CustomerID] [uniqueidentifier] NOT NULL, [Description] [nvarchar](50) NOT NULL, [LastUpdatedTime] [datetime] NOT NULL, [LastUpdatedBy] [uniqueidentifier] NOT NULL, PRIMARY KEY CLUSTERED ( [ID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO ALTER TABLE [dbo].[Diets] WITH CHECK ADD CONSTRAINT [FK_Diets_CustomerPreferences] FOREIGN KEY([CustomerID]) REFERENCES [dbo].[CustomerPreferences] ([ID]) GO ALTER TABLE [dbo].[Diets] CHECK CONSTRAINT [FK_Diets_CustomerPreferences] GO This seems like a fairly common use case, so I'm not sure where I'm going wrong.

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  • Long task in Javascript

    - by Misha Moroshko
    Why in the following code I see the whole page at once ? Thanks ! HTML: <div></div> CSS: div { width: 100px; height: 300px; border: 1px solid black; text-align: center; } Javascript: $(function() { for (var i=0; i<15; i++) { sleep(100); $("div").append("<span>--- " + i + " ---<br /></span>"); } function sleep(milliseconds) { var start = new Date().getTime(); for (var i = 0; i < 1e7; i++) { if ((new Date().getTime() - start) > milliseconds){ break; } } } });

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  • Avoid Circular Reference in Swing GUI

    - by drhorrible
    Maybe it's not worth worrying about in this scenario, but lets say you have two classes, a JFrame with all its components, and a server-like class that handles requests from remote clients. The user is able to start and stop server objects through the GUI, and is shown various events that happen to each server object. Whether or not I use an explicit pattern (like MVC), it seems like the JFrame needs a reference to the server class (to call start and stop) and the server needs a reference to the JFrame (to notify of it of certain events). Is this a problem, or am I looking at this situation in the wrong way?

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  • Visual Studio 2008 error while debugging an app with "uiAccess=true" in the manifest

    - by Jon Tackabury
    I have a C# WinForms application that has "uiAccess" set to "True" in it's manifest file. When I try to start/debug it in Visual Studio 2008 SP1 under Windows 7 x64 (RTM) I get this error: Running an Accessibility application requires following the steps described in Help. The help button is a broken link, and clicking ok just closes the application. It is digitally signed, and I can start it just fine in Windows Explorer. Here is the same bug in MS Connect, but unfortunately it's closed: https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=384183 Question: Can anyone else using Vista/Win7 x64 (with UAC enabled) confirm that they experience the same problem? Has anyone seen this problem before and have any idea how to work around it?

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  • changing the last commit message without committing newest changes

    - by Oleg2718281828
    My ideal workflow would consist of the following steps edit the code compile git commit -a -m "commit message" start running the new binaries, tests, etc. (may take 10+ minutes) start new changes, while the binaries are still running when step # 4 is finished, edit the commit message from step # 3, without committing the changes introduced in step # 5, by adding, say, "test FOO failed" I cannot use git commit -a --amend -m "new commit message", because this commits the new changes as well. I'm not sure that I want to bother with staging or branching. I wish I could just edit the commit message without committing any new changes. Is it possible?

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  • Error in connecting Eclipse to SQL Server

    - by user3721900
    This is the syntax error Jun 10, 2014 5:15:51 PM org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files (x86)\Java\jre7\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files (x86)/Java/jre7/bin/client;C:/Program Files (x86)/Java/jre7/bin;C:/Program Files (x86)/Java/jre7/lib/i386;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\Program Files (x86)\AMD APP\bin\x86_64;C:\Program Files (x86)\AMD APP\bin\x86;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Windows Live\Shared;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Microsoft\Web Platform Installer\;C:\Program Files (x86)\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\;C:\Program Files (x86)\Windows Kits\8.0\Windows Performance Toolkit\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;C:\Program Files (x86)\Microchip\MPLAB C32 Suite\bin;C:\Program Files\Java\jdk1.7.0_25\bin;C:\Program Files (x86)\Java\jdk1.7.0_03\bin;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL Server\100\Tools\Binn\;c:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn\;c:\Program Files\Microsoft SQL Server\100\DTS\Binn\;C:\Program Files (x86)\Google\google_appengine\;C:\Users\Patrick\Desktop\2013-2014 2nd Sem Files\Eclipsee\eclipse;;. Jun 10, 2014 5:15:51 PM org.apache.tomcat.util.digester.SetPropertiesRule begin WARNING: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:B2B' did not find a matching property. Jun 10, 2014 5:15:51 PM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["http-bio-8080"] Jun 10, 2014 5:15:51 PM org.apache.coyote.AbstractProtocol init INFO: Initializing ProtocolHandler ["ajp-bio-8009"] Jun 10, 2014 5:15:51 PM org.apache.catalina.startup.Catalina load INFO: Initialization processed in 544 ms Jun 10, 2014 5:15:51 PM org.apache.catalina.core.StandardService startInternal INFO: Starting service Catalina Jun 10, 2014 5:15:51 PM org.apache.catalina.core.StandardEngine startInternal INFO: Starting Servlet Engine: Apache Tomcat/7.0.42 Jun 10, 2014 5:15:52 PM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["http-bio-8080"] Jun 10, 2014 5:15:52 PM org.apache.coyote.AbstractProtocol start INFO: Starting ProtocolHandler ["ajp-bio-8009"] Jun 10, 2014 5:15:52 PM org.apache.catalina.startup.Catalina start INFO: Server startup in 374 ms com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near '`'. This is my code package b2b.fishermall; public class ConnectionString extends SqlStringCommands { public String getDriver(){ return "com.microsoft.sqlserver.jdbc.SQLServerDriver"; } public String getURL() { return "jdbc:sqlserver://localhost:1433;databaseName=B2B;integratedSecurity=true;"; } public String getUsername() { return ""; } public String getDbPassword() { return ""; } }

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  • Checking Android version

    - by John Smith
    I need if the phone running the app api level is 14 which is android 4.0 or more ( example api levcel 15 ) then startActivity ... else if the api level is lower than 14 ( example 13 ), then startActivity ... String AndroidVersion = android.os.Build.VERSION.RELEASE; if ( AndroidVersion == 4.0 ) { Intent start = new Intent(S.this, Menu.class); startActivity(start); } else { Intent startt = new Intent(S.this, Menu2.class); startActivity(startt); } whats the wrong ?

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  • Is my way of doing threads in Android correct?

    - by Charlie
    Hi, I'm writing a live wallpaper, and I'm forking off two separate threads in my main wallpaper service. One updates, and the other draws. I was under the impression that once you call thread.start(), it took care of everything for you, but after some trial and error, it seems that if I want my update and draw threads to keep running, I have to manually keep calling their run() methods? In other words, instead of calling start() on both threads and forgetting, I have to manually set up a delayed handler event that calls thread.run() on both the update and draw threads every 16 milliseconds. Is this the correct way of having a long running thread? Also, to kill threads, I'm just setting them to be daemons, then nulling them out. Is this method ok? Most examples I see use some sort of join() / interrupt() in a while loop...I don't understand that one...

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  • [jQuery UI - Accordion] Styling active header?

    - by RC
    Hi, Simple issue: I am using Accordion without any UI themes (just barebones, using my own CSS). So far, so good, except that I cannot figure out how to set an "active" style for the currently selected header. The jQuery code: $("#menu").accordion({ event:"mouseover",header:"a.top" }); The HTML code: <a href="#" class="top">XXX1</a> <div class="sub"> <a href="#">Subheading 1</a> <a href="#">Subheading 2</a> <a href="#">Subheading 3</a> </div> <a href="#" class="top">XXX2</a> <div class="sub"> <a href="#">Subheading 1</a> <a href="#">Subheading 2</a> <a href="#">Subheading 3</a> </div> This works great, except that I cannot find a way to define the styles for the active header without using ThemeRoller. Manually setting the following styles in my CSS has no effect: .ui-state-active .ui-widget-content .ui-state-active .ui-state-active a .ui-state-active a:link .ui-state-active a:visited Assistance, please?

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  • Change UIView alpha value

    - by Ask
    I'm trying to create an UIView and change its alpha property to simulate backlight change. Here is my code if (TransparentView == nil) { TransparentView = [[UIView alloc] initWithFrame:self.view.bounds]; TransparentView.backgroundColor = [UIColor whiteColor]; self.view = TransparentView; } start=start+appDelegate.OnOffTime; TransparentView.alpha = 0.2; float step = 1.0 / ( appDelegate.OnOffTime * 100); for (float f = 0; f < 1; f=f+step) { TransparentView.alpha = (CGFloat)(1 - f); [NSThread sleepForTimeInterval:0.01]; } Both TransparentView.alpha = 0.2 and TransparentView.alpha = (CGFloat)(1 - f) do change TransparentView.alpha, but only TransparentView.alpha = 0.2 changes real device "brightness'. What am I doing wrong?

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  • How to force VS to react on a changing of an attached property in design time?

    - by sedovav
    Imagine, we have a wpf class library with a window1.xaml and a resource dictionary res.xaml defined in it. I know how to use styles that defined in the res.xaml for the controls that defined into the window: <Window x:Class="...Window1"> <Window.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="res.xaml"/> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> <\Window.Resources> </Window> So we can use the dictionary's styles for all elements into the window (except the window element... I don't know how to set the style from the res.xaml for the window :( ). I saw the article where describes how to create and use attached property to add resource dictionaries to a FrameworkElement.Resources.MergedDictionaries list. It's good! We can do the same as we done in the example above but we can use the window style now. It looks like this: <Window x:Class="...Window1" xmlns: resources="..." resources:SharedResources.MergedDictionaries="res.xaml"> </Window> That's good but VS2008 cannot recognize resources from res.xaml in design time. So we have a sad situation: all styles from res.xaml are available in run-time but in the design-time VS cannot display the window (it can't find the mentioned styles). Does anybody know how to fix this situation?

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  • dialog.show() crashes my application, why?

    - by user1739462
    I'm new in adroid. I like to do things when the color reach a value. I like (for example) show the alert if r is bigger than 30, but the application go in crash. Thank for very simple answares. public class MainActivity extends Activity { private AlertDialog dialog; private AlertDialog.Builder builder; private BackgroundColors view; public class BackgroundColors extends SurfaceView implements Runnable { public int grand=0; public int step=0; private boolean flip=true; private Thread thread; private boolean running; private SurfaceHolder holder; public BackgroundColors(Context context) { super(context); } Inside this loop while running is true. is impossible to show dialogs ?? public void run() { int r = 0; while (running){ if (holder.getSurface().isValid()){ Canvas canvas = holder.lockCanvas(); if (r > 250) r = 0; r += 10; if (r>30 && flip){ flip=false; // ********************************* dialog.show(); // ********************************* // CRASH !! } try { Thread.sleep(300); } catch(InterruptedException e) { e.printStackTrace(); } canvas.drawARGB(255, r, 255, 255); holder.unlockCanvasAndPost(canvas); } } } public void start() { running = true; thread = new Thread(this); holder = this.getHolder(); thread.start(); } public void stop() { running = false; boolean retry = true; while (retry){ try { thread.join(); retry = false; } catch(InterruptedException e) { retry = true; } } } public boolean onTouchEvent(MotionEvent e){ dialog.show(); return false; } protected void onSizeChanged(int xNew, int yNew, int xOld, int yOld){ super.onSizeChanged(xNew, yNew, xOld, yOld); grand = xNew; step =grand/15; } } public void onCreate(Bundle b) { super.onCreate(b); view = new BackgroundColors(this); this.setContentView(view); builder = new AlertDialog.Builder(this); builder.setMessage("ciao"); builder.setPositiveButton("OK", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int which) { Log.d("Basic", "It worked"); } }); dialog = builder.create(); } public void onPause(){ super.onPause(); view.stop(); } public void onResume(){ super.onResume(); view.start(); } }

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  • JavaScript pack("d") - binary strings

    - by Tim Whitlock
    I'm trying to replicate the Perl and PHP style pack and unpack functions in JavaScript. Unsigned integers were easy enough, so my pack('n') and pack('N') are ok. But my lack of a computer science background is a hurdle now and I don't know where to start with pack('d') for packing JavaScript's standard floating point. Is there a JavaScript library for this out there? If not, is there a good resource where I can learn how to do this? I am fine with bitwise and binary level operations in JS, I just don't know where to start with the logic. Thanks.

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  • Finding open contiguous blocks of time for every day of a month, fast

    - by Chris
    I am working on a booking availability system for a group of several venues, and am having a hard time generating the availability of time blocks for days in a given month. This is happening server-side in PHP, but the concept itself is language agnostic -- I could be doing this in JS or anything else. Given a venue_id, month, and year (6/2012 for example), I have a list of all events occurring in that range at that venue, represented as unix timestamps start and end. This data comes from the database. I need to establish what, if any, contiguous block of time of a minimum length (different per venue) exist on each day. For example, on 6/1 I have an event between 2:00pm and 7:00pm. The minimum time is 5 hours, so there's a block open there from 9am - 2pm and another between 7pm and 12pm. This would continue for the 2nd, 3rd, etc... every day of June. Some (most) of the days have nothing happening at all, some have 1 - 3 events. The solution I came up with works, but it also takes waaaay too long to generate the data. Basically, I loop every day of the month and create an array of timestamps for each 15 minutes of that day. Then, I loop the time spans of events from that day by 15 minutes, marking any "taken" timeslot as false. Remaining, I have an array that contains timestamp of free time vs. taken time: //one day's array after processing through loops (not real timestamps) array( 12345678=>12345678, // <--- avail 12345878=>12345878, 12346078=>12346078, 12346278=>false, // <--- not avail 12346478=>false, 12346678=>false, 12346878=>false, 12347078=>12347078, // <--- avail 12347278=>12347278 ) Now I would need to loop THIS array to find continuous time blocks, then check to see if they are long enough (each venue has a minimum), and if so then establish the descriptive text for their start and end (i.e. 9am - 2pm). WHEW! By the time all this looping is done, the user has grown bored and wandered off to Youtube to watch videos of puppies; it takes ages to so examine 30 or so days. Is there a faster way to solve this issue? To summarize the problem, given time ranges t1 and t2 on day d, how can I determine the remaining time left in d that is longer than the minimum time block m. This data is assembled on demand via AJAX as the user moves between calendar months. Results are cached per-page-load, so if the user goes to July a second time, the data that was generated the first time would be reused. Any other details that would help, let me know. Edit Per request, the database structure (or the part that is relevant here) *events* id (bigint) title (varchar) *event_times* id (bigint) event_id (bigint) venue_id (bigint) start (bigint) end (bigint) *venues* id (bigint) name (varchar) min_block (int) min_start (varchar) max_start (varchar)

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  • How to show a page after a specific time period?

    - by Mahfuz
    I want to build an online quiz test site. Suppose, exam will start at 10:00 am and a student login to give exam at 9:45 am. Whenever the student clicks 'Take Exam' button, he/she cannot not get access to the question paper because the exam time is 10:00 am and there are still 15 minutes before the exam start. Now I want to put some Javascript or PHP code that will prohibit the students to give exam earlier and if a students come early, it will show a stopwatch which display the remaining time before exam time and when the current time is equal to exam time then he/she will be directly redirected to the question paper page.

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  • Use applescript to write iCal data to file

    - by Guy
    I am trying to get applescript to read todays ical events and write them to a file. The code is as follows: set out to "" tell application "iCal" set todaysDate to current date set time of todaysDate to 0 set tomorrowsDate to todaysDate + (1 * days) repeat with c in (every calendar) set theEvents to (every event of c whose start date = todaysDate and start date < tomorrowsDate) repeat with current_event in theEvents set out to out & summary of current_event & " " end repeat end repeat end tell set the_file to (((path to documents folder) as string) & "DesktopImage:ical.txt") try open for access the_file with write permission set eof of the_file to 0 write out to the_file close access the_file on error try close access the_file end try end try return out The ical items are getting returned correctly and the file ical.txt is created correctly in the folder Documents/DesktopImage, but the file is blank. Even if I substitute write out to the_file with write "Test string" to the_file it still comes up blank any ideas? Ty

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  • How to get a 3D picture in an iphone app?

    - by wolverine
    In an application, i saw that they used to display pictures of vehicles. But what was amazing was when we touch and swipe in that picture, it rotates in 3d way left and right. And from the front view we can rotate and get to see its back view also. It is a very good feature and i was trying to replicate it. But couldnt get an idea of how and where to start. My doubts are Whats the actual format of the thing, it surely isn't a picture. How do they get to rotate it? Could someone give me an idea where i should start or where I should look upon?

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