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  • NSTimer Reset Not Working

    - by user355900
    hi, i have a nstimer and it works perfectly counting down from 2:00 but when i hit the reset button it does not work it just stops the timer and when i press start again it will carry on with the timer as if it had never been stopped. Here is my code `@implementation TimerAppDelegate @synthesize window; (void)applicationDidFinishLaunching:(UIApplication *)application { timerLabel.text = @"2:00"; seconds = 120; // Override point for customization after application launch [window makeKeyAndVisible]; } (void)viewDidLoad { [timer invalidate]; } (void)countDownOneSecond { seconds--; int currentTime = [timerLabel.text intValue]; int newTime = currentTime - 1; int displaySeconds = !(seconds % 60) ? 0 : seconds < 60 ? seconds : seconds - 60; int displayMinutes = floor(seconds / 60); NSString *time = [NSString stringWithFormat:@"%d:%@%d", displayMinutes, [[NSString stringWithFormat:@"%d", displaySeconds] length] == 1 ? @"0" : @"", displaySeconds ]; timerLabel.text = time; if(seconds == 0) { [timer invalidate]; } } (void)startOrStopTimer { if(timerIsRunning){ [timer invalidate]; [startOrStopButton setTitle:@"Start" forState:UIControlStateNormal]; } else { timer = [[NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(countDownOneSecond) userInfo:nil repeats:YES] retain]; [startOrStopButton setTitle:@"Stop" forState:UIControlStateNormal]; } timerIsRunning = !timerIsRunning; } (void)resetTimer { [timer invalidate]; [startOrStopButton setTitle:@"Start" forState:UIControlStateNormal]; [timer invalidate]; timerLabel.text = @"2:00"; } (void)dealloc { [window release]; [super dealloc]; } @end` thanks

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  • jquery plugin caroufredsel hide next/prev buttons until mouseover carousel

    - by John Magnolia
    I am trying to make the buttons hide by default and they only become visible when the mouse is over. Although I am having problems where the carousel core code seems to be adding display block even if I set display none in the CSS. var $slides = $("#slides"); $slides.find('ul.banners').eq(0).carouFredSel({ height: 360, items: { visible: 1 }, scroll: { easing: "easeInOutSine", duration: 1200 }, auto: { delay: 1000 }, prev: { button: $slides.find('.prev'), items: 1 }, next:{ button: $slides.find('.next'), items: 1 }, pagination: { container: $slides.find(".pagination"), keys: true, anchorBuilder: function(nr) { return '<li><a href="#"><span>'+nr+'</span></a></li>'; } } }); $slideButtons = $slides.find(".next,.prev"); $slides.find('ul.banners').hover(function(){ $slideButtons.fadeIn(); },function(){ $slideButtons.fadeOut(); }); HTML <div id="slides"> <ul class="banners"> <li><img /></li> <li><img /></li> </ul> <ul class="pagination"></ul> <div class="next">Next</div> <div class="prev">Previous</div> </div>

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  • css caption issue

    - by Moode Osman
    i have problem with caption to make caption appear under each photo when hover over it but thr problem here they appear all on one side one place the left bottom side here the code for HTML <div id="content2"> <ul style="width: 5020px; height: 600px;"> <li class="image" style="width: 392px;"><img src="images/pr1x.jpg" ><p class="caption">1st caption</p></li> <li class="image" style="width: 392px;"><img src="images/pr2x.jpg" ><p class="caption">2st caption</p></li> </ul></div> here the code for CSS li.image p.caption { position:absolute; display: none; font-size: 28px; color: red; } li.image:hover p.caption { display: list-item; }? #content2{ width: 150%; height: 600px; float:left; overflow:hidden; } #content2 p{ width: 150%; } .scrollbar-hor{ background-color: #e5e2de; height: 24px; width: 150%; float:left; } .handle-hor{ height: 25px; width: 400px; background: url(http://brafitting.info/images/bar.jpg) no-repeat; } plz help ty

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  • c# syntax and Linq, IQueryable

    - by hdiver
    Hello. This is a question about the SYNTAX of c# and NOT about how we call/use IQueryable Can someone please explain to me: We have this declaration (System.Linq): public static double Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, int>> selector) and to call the Average double average = fruits.AsQueryable().Average(s => s.Length); I understand how to call the Average and all the similar static method of IQueryable but I don’t understand the syntax of the declaration. public static double Average<TSource>(this IQueryable<TSource> source, Expression<Func<TSource, int>> selector) What does the <TSource> mean in Average<TSource>( and also the this IQueryable<TSource> source. since only one parameter passes when we call it and the actual lamda expression (s => s.Length); Thanks in advance.

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  • Are Tuples a poor design decision in C#?

    - by Jason Webb
    With the addition of the Tuple class in .net 4, I have been trying to decide if using them in my design is a bad choice or not. The way I see it, a Tuple is a shortcut to writing a result class (I am sure there are other uses too). So this: public class ResultType { public string StringValue { get; set; } public int IntValue { get; set; } } public ResultType GetAClassedValue() { //..Do Some Stuff ResultType result = new ResultType { StringValue = "A String", IntValue = 2 }; return result; } Is equivalent to this: public Tuple<string, int> GetATupledValue() { //...Do Some stuff Tuple<string, int> result = new Tuple<string, int>("A String", 2); return result; } So setting aside the possibility that I am missing the point of Tuples, is the example with a Tuple a bad design choice? To me it seems like less clutter, but not as self documenting and clean. Meaning that with the type ResultType, it is very clear later on what each part of the class means but you have extra code to maintain. With the Tuple<string, int> you will need to look up and figure out what each Item represents, but you write and maintain less code. Any experience you have had with this choice would be greatly appreciated.

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  • Ajax: Add new <div> from JSON with jQuery

    - by Francesc
    Hi, In a page I have this HTML code: <div id="content"> <div class="container"> <div id="author">@Francesc</div> <div id="message"Hey World!</div <div id="time"13/06/2010 11:53 GMT</div </div> <div class="container"> <div id="author">@SomeOtherUser</div> <div id="message"Bye World!</div <div id="time"13/06/2010 14:53 GMT</div </div> <div class="container"> <div id="author">@Me</div> <div id="message"Hey World!</div <div id="time"13/06/2010 18:53 GMT</div </div> </div> I want to ask, how to get a JSON file, from the server that has more recent messages and put them to the top, I mean above the first <div class="container">. Another question, it's possible to pass with GET when submiting the request to the server, the time of last update? How can I do it? Thanks.

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  • Weird output of Throwable getMessage()

    - by Ravi Gupta
    Hi I have below pseudo code with throws an exception like this throw new MyException("Bad thing happened","com.stuff.errorCode"); where MyException extends Exception class. So the problem is when I try to get the message from MyException class by calling myEx.getMessage() it returns ???en_US.Bad thing happened??? instead of my original message i.e. Bad thing happened I have checked that MyException class doesn't overrides Throwable class's getMessage() behavior. Below is the how the call passes from MyException.getMessage() to Throwable.getMessage() public MyException(String msg, String sErrorCode){ super(msg); this.sErrorCode = sErrorCode; this.iSeverity = 0; } which then calls public Exception(String message) { super(message); } and finally public Throwable(String message) { fillInStackTrace(); detailMessage = message; } when I do a getMessage on myexception it calls Throwable's getMessage as below public String getMessage() { return detailMessage; } So ideally it should return the original message as I set when throwing the exception. What's the ???en_US thing ?

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  • Creating a Pop animation similar to the presentation of UIAlertView

    - by JK
    I would like to present a view in the same manner as that of UIAlertView - a pop/spring. Unfortunately subclassing UIAlertView is not an option for the view I need to present. I have written some code, but I can't seem to get it as realistic as I would like. I would appreciate any suggestions for greater realism or a link if anything similar has been done (I could not find anything on Google). Thank you. - (id)initWithFrame:(CGRect)frame { if ((self = [super initWithFrame:frame])) { self.backgroundColor = [UIColor whiteColor]; v = [[UIView alloc] initWithFrame:CGRectMake(140, 140, 60, 60)]; v.backgroundColor = [UIColor blueColor]; [self addSubview:v]; [self animate]; } return self; } - (void)animate { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [UIView setAnimationDuration:0.2]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(popStep1Complete)]; v.frame = CGRectMake(90, 90, 140, 140); [UIView commitAnimations]; } - (void)popStep1Complete { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [UIView setAnimationDuration:0.15]; [UIView setAnimationDelegate:self]; [UIView setAnimationDidStopSelector:@selector(popStep2Complete)]; v.frame = CGRectMake(110, 110, 100, 100); [UIView commitAnimations]; } - (void)popStep2Complete { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationCurve:UIViewAnimationCurveLinear]; [UIView setAnimationDuration:0.15]; v.frame = CGRectMake(100, 100, 120, 120); [UIView commitAnimations]; }

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  • Java Compiler Creation Help..Please

    - by Brian
    I need some help with my code here...What we are trying to do is make a compiler that will read a file containing Machine Code and converting it to 100 lines of 4 bits example: this code is the machine code being converting to opcode and operands. I need some help please.. thanks 799 798 198 499 1008 1108 899 909 898 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Everything compiles but when I go and run my Test.java I get the following OutPut: Exception in thread "main" java.util.NoSuchElementException: No line found at java.util.Scanner.nextLine(Scanner.java:1516) at Compiler.FirstPass(Compiler.java:22) at Compiler.compile(Compiler.java:11) at Test.main(Test.java:5) Here is my class Compiler: import java.io.*; import java.io.DataOutputStream; import java.util.NoSuchElementException; import java.util.Scanner; class Compiler{ private int lc = 0; private int dc = 99; public void compile(String filename) { SymbolList symbolTable = FirstPass(filename); SecondPass(symbolTable, filename); } public SymbolList FirstPass(String filename) { File file = new File(filename); SymbolList temp = new SymbolList(); int dc = 99; int lc = 0; try{ Scanner scan = new Scanner(file); String line = scan.nextLine(); String[] linearray = line.split(" "); while(line!=null){ if(!linearray[0].equals("REM")){ if(!this.isInstruction(linearray[0])){ linearray[0]=removeColon(linearray[0]); if(this.isInstruction(linearray[1])){ temp.add(new Symbol(linearray[0], lc, null)); lc++; } else { temp.add(new Symbol(linearray[0], dc, Integer.valueOf((linearr\ ay[2])))); dc--; } } else { if(!linearray[0].equals("REM")) lc++; } } try{ line = scan.nextLine(); } catch(NoSuchElementException e){ line=null; break; } linearray = line.split(" "); } } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } return temp; } public String makeFilename(String filename) { return filename + ".ex"; } public String removeColon(String str) { if(str.charAt(str.length()-1) == ':'){ return str.substring(0, str.length()-1); } else { return str; } } public void SecondPass(SymbolList symbolTable, String filename){ try { int dc = 99; //Open file for reading File file = new File(filename); Scanner scan = new Scanner(file); //Make filename of new executable file String newfile = makeFilename(filename); //Open Output Stream for writing new file. FileOutputStream os = new FileOutputStream(filename); DataOutputStream dos = new DataOutputStream(os); //Read First line. Split line by Spaces into linearray. String line = scan.nextLine(); String[] linearray = line.split(" "); while(scan.hasNextLine()){ if(!linearray[0].equals("REM")){ int inst=0, opcode, loc; if(isInstruction(linearray[0])){ opcode = getOpcode(linearray[0]); loc = symbolTable.searchName(linearray[1]).getMemloc(); inst = (opcode*100)+loc; } else if(!isInstruction(linearray[0])){ if(isInstruction(linearray[1])){ opcode = getOpcode(linearray[1]); if(linearray[1].equals("STOP")) inst=0000; else { loc = symbolTable.searchName(linearray[2]).getMemloc(); inst = (opcode*100)+loc; } } if(linearray[1].equals("DC")) dc--; } System.out.println(inst); dos.writeInt(inst); linearray = line.split(" "); } if(scan.hasNextLine()) { line = scan.nextLine(); } } scan.close(); for(int i = lc; i <= dc; i++) { dos.writeInt(0); } for(int i = dc+1; i<100; i++){ dos.writeInt(symbolTable.searchLocation(i).getValue()); if(i!=99) dos.writeInt(0); } dos.close(); os.close(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } public int getOpcode(String inst){ int toreturn = -1; if(isInstruction(inst)){ if(inst.equals("STOP")) toreturn=0; if(inst.equals("LD")) toreturn=1; if(inst.equals("STO")) toreturn=2; if(inst.equals("ADD")) toreturn=3; if(inst.equals("SUB")) toreturn=4; if(inst.equals("MPY")) toreturn=5; if(inst.equals("DIV")) toreturn=6; if(inst.equals("IN")) toreturn=7; if(inst.equals("OUT")) toreturn=8; if(inst.equals("B")) toreturn=9; if(inst.equals("BGTR")) toreturn=10; if(inst.equals("BZ")) toreturn=11; return toreturn; } else { return -1; } } public boolean isInstruction(String totest){ boolean toreturn = false; String[] labels = {"IN", "LD", "SUB", "BGTR", "BZ", "OUT", "B", "STO", "STOP", "AD\ D", "MTY", "DIV"}; for(int i = 0; i < 12; i++){ if(totest.equals(labels[i])) toreturn = true; } return toreturn; } } And here is my class Computer: import java.io.*; import java.util.NoSuchElementException; import java.util.Scanner; class Computer{ private Cpu cpu; private Input in; private OutPut out; private Memory mem; public Computer() throws IOException { Memory mem = new Memory(100); Input in = new Input(); OutPut out = new OutPut(); Cpu cpu = new Cpu(); System.out.println(in.getInt()); } public void run() throws IOException { cpu.reset(); cpu.setMDR(mem.read(cpu.getMAR())); cpu.fetch2(); while (!cpu.stop()) { cpu.decode(); if (cpu.OutFlag()) OutPut.display(mem.read(cpu.getMAR())); if (cpu.InFlag()) mem.write(cpu.getMDR(),in.getInt()); if (cpu.StoreFlag()) { mem.write(cpu.getMAR(),in.getInt()); cpu.getMDR(); } else { cpu.setMDR(mem.read(cpu.getMAR())); cpu.execute(); cpu.fetch(); cpu.setMDR(mem.read(cpu.getMAR())); cpu.fetch2(); } } } public void load() { mem.loadMemory(); } } Here is my Memory class: import java.io.*; import java.util.NoSuchElementException; import java.util.Scanner; class Memory{ private MemEl[] memArray; private int size; private int[] mem; public Memory(int s) {size = s; memArray = new MemEl[s]; for(int i = 0; i < s; i++) memArray[i] = new MemEl(); } public void write (int loc,int val) {if (loc >=0 && loc < size) memArray[loc].write(val); else System.out.println("Index Not in Domain"); } public int read (int loc) {return memArray[loc].read(); } public void dump() { for(int i = 0; i < size; i++) if(i%1 == 0) System.out.println(memArray[i].read()); else System.out.print(memArray[i].read()); } public void writeTo(int location, int value) { mem[location] = value; } public int readFrom(int location) { return mem[location]; } public int size() { return mem.length; } public void loadMemory() { this.write(0, 799); this.write(1, 798); this.write(2, 198); this.write(3, 499); this.write(4, 1008); this.write(5, 1108); this.write(6, 899); this.write(7, 909); this.write(8, 898); this.write(9, 0000); } public void loadFromFile(String filename){ try { FileReader fr = new FileReader(filename); BufferedReader br = new BufferedReader(fr); String read=null; int towrite=0; int l=0; do{ try{ read=br.readLine(); towrite = Integer.parseInt(read); }catch(Exception e){ } this.write(l, towrite); l++; }while(l<100); }catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } Here is my Test class: public class Test{ public static void main(String[] args) throws java.io.IOException { Compiler compiler = new Compiler(); compiler.compile("program.txt"); } }

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  • Should I use IDisposable for purely managed resources?

    - by John Gietzen
    Here is the scenario: I have an object called a Transaction that needs to make sure that only one entity has permission to edit it at any given time. In order to facilitate a long-lived lock, I have the class generating a token object that can be used to make the edits. You would use it like this: var transaction = new Transaction(); using (var tlock = transaction.Lock()) { transaction.Update(data, tlock); } Now, I want the TransactionLock class to implement IDisposable so that its usage can be clear. But, I don't have any unmanaged resources to dispose. however, the TransctionLock object itself is a sort of "unmanaged resource" in the sense that the CLR doesn't know how to properly finalize it. All of this would be fine and dandy, I would just use IDisposable and be done with it. However, my issue comes when I try to do this in the finalizer: ~TransactionLock() { this.Dispose(false); } I want the finalizer to release the transaction from the lock, if possible. How, in the finalizer, do I detect if the parent transaction (this.transaction) has already been finalized? Is there a better pattern I should be using? The Transaction class looks something like this: public sealed class Transaction { private readonly object lockMutex = new object(); private TransactionLock currentLock; public TransactionLock Lock() { lock (this.lockMutex) { if (this.currentLock != null) throw new InvalidOperationException(/* ... */); this.currentLock = new TransactionLock(this); return this.currentLock; } } public void Update(object data, TransactionLock tlock) { lock (this.lockMutex) { this.ValidateLock(tlock); // ... } } internal void ValidateLock(TransactionLock tlock) { if (this.currentLock == null) throw new InvalidOperationException(/* ... */); if (this.currentLock != tlock) throw new InvalidOperationException(/* ... */); } internal void Unlock(TransactionLock tlock) { lock (this.lockMutex) { this.ValidateLock(tlock); this.currentLock = null; } } }

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  • jQuery when div is clicked update input field issue

    - by stogdilla
    Hello, I'm rather new to jquery so this may be the issue. I have a script that outputs several divs all with different text data in them. I would like it when I click one of them that an input field's value is updated to that text currently I have: <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js"></script> <script type="text/javascript"> $(document).ready(function() { $("a.results]").click(function() { data= this.text(); $("#updateme").val(data); }); }); </script> <p> <label>Field <input type="text" name="updateme" id="updateme"> </label> </p> <a href="#" class="results">Florida</a> <a href="#" class="results">Florida 2</a> <a href="#" class="results">Florida 3</a> How can I make it so that whatever link is clicked that is the data that gets updated into the input's value? I can get it to take one or I can script out different cases of each changing the class name but I think there has to be a way where it references whatever link is being clicked instead of what it's currently doing. Thanks in advance!

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  • Deal with undefined values in code or in the template?

    - by David
    I'm writing a web application (in Python, not that it matters). One of the features is that people can leave comments on things. I have a class for comments, basically like so: class Comment: user = ... # other stuff where user is an instance of another class, class User: name = ... # other stuff And of course in my template, I have <div>${comment.user.name}</div> Problem: Let's say I allow people to post comments anonymously. In that case comment.user is None (undefined), and of course accessing comment.user.name is going to raise an error. What's the best way to deal with that? I see three possibilities: Use a conditional in the template to test for that case and display something different. This is the most versatile solution, since I can change the way anonymous comments are displayed to, say, "Posted anonymously" (instead of "Posted by ..."), but I've often been told that templates should be mindless display machines and not include logic like that. Also, other people might wind up writing alternate templates for the same application, and I feel like I should be making things as easy as possible for the template writer. Implement an accessor method for the user property of a Comment that returns a dummy user object when the real user is undefined. This dummy object would have user.name = 'Anonymous' or something like that and so the template could access it and print its name with no error. Put an actual record in my database corresponding to a user with user.name = Anonymous (or something like that), and just assign that user to any comment posted when nobody's logged in. I know I've seen some real-world systems that operate this way. (phpBB?) Is there a prevailing wisdom among people who write these sorts of systems about which of these (or some other solution) is the best? Any pitfalls I should watch out for if I go one way vs. another? Whoever gives the best explanation gets the checkmark.

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  • Multiple use of a form before it is submitted

    - by OregonTrail
    I'm new to JavaScript, and trying to figure out the canonical way to do the following. I have a form with some checkboxes and a selector. Let's say the checkboxes are styles of music and the selector is for people's names. I'd like the user to be able to select the styles of music for each of the people's names and then submit the form with all of the data. For example, the user might first check off Classical, Jazz, Rock, and Pop and choose "Joe", then select Jazz, Pop, Country, and Electronica and choose "Jane". So there would have to be two different buttons for "submit person" and "submit form". I would like to: Have a list of the names and their chosen styles populate below the form, for feedback Allow the user to use the form as much as they want, and then submit all the data at the end I get the feeling that using jquery and JSON is perfect for this, but I'm not sure what search terminology to use to figure out how to do this. If it matters, the form will be processed by a Django view in Python.

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  • NHibernate unintential lazy property loading

    - by chiccodoro
    I introduced a mapping for a business object which has (among others) a property called "Name": public class Foo : BusinessObjectBase { ... public virtual string Name { get; set; } } For some reason, when I fetch "Foo" objects, NHibernate seems to apply lazy property loading (for simple properties, not associations): The following code piece generates n+1 SQL statements, whereof the first only fetches the ids, and the remaining n fetch the Name for each record: ISession session = ...IQuery query = session.CreateQuery(queryString); ITransaction tx = session.BeginTransaction(); List<Foo> result = new List<Foo>(); foreach (Foo foo in query.Enumerable()) { result.Add(foo); } tx.Commit(); session.Close(); produces: NHibernate: select foo0_.FOO_ID as col_0_0_ from V1_FOO foo0_ NHibernate: SELECT foo0_.FOO_ID as FOO1_2_0_, foo0_.NAME as NAME2_0_ FROM V1_FOO foo0_ WHERE foo0_.FOO_ID=:p0;:p0 = 81 NHibernate: SELECT foo0_.FOO_ID as FOO1_2_0_, foo0_.NAME as NAME2_0_ FROM V1_FOO foo0_ WHERE foo0_.FOO_ID=:p0;:p0 = 36470 NHibernate: SELECT foo0_.FOO_ID as FOO1_2_0_, foo0_.NAME as NAME2_0_ FROM V1_FOO foo0_ WHERE foo0_.FOO_ID=:p0;:p0 = 36473 Similarly, the following code leads to a LazyLoadingException after session is closed: ISession session = ... ITransaction tx = session.BeginTransaction(); Foo result = session.Load<Foo>(id); tx.Commit(); session.Close(); Console.WriteLine(result.Name); Following this post, "lazy properties ... is rarely an important feature to enable ... (and) in Hibernate 3, is disabled by default." So what am I doing wrong? I managed to work around the LazyLoadingException by doing a NHibernateUtil.Initialize(foo) but the even worse part are the n+1 sql statements which bring my application to its knees. This is how the mapping looks like: <class name="Foo" table="V1_FOO"> ... <property name="Name" column="NAME"/> </class> BTW: The abstract "BusinessObjectBase" base class encapsulates the ID property which serves as the internal identifier.

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  • In this example, would Customer or AccountInfo properly be the entity group parent?

    - by Badhu Seral
    In this example, the Google App Engine documentation makes the Customer the entity group parent of the AccountInfo entity. Wouldn't AccountInfo encapsulate Customer rather than the other way around? Normally I would think of an AccountInfo class as including all of the information about the Customer. import javax.jdo.annotations.IdGeneratorStrategy; import javax.jdo.annotations.PersistenceCapable; import javax.jdo.annotations.Persistent; import javax.jdo.annotations.PrimaryKey; import com.google.appengine.api.datastore.Key; import com.google.appengine.api.datastore.KeyFactory; @PersistenceCapable public class AccountInfo { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Key key; public void setKey(Key key) { this.key = key; } } // ... KeyFactory.Builder keyBuilder = new KeyFactory.Builder(Customer.class.getSimpleName(), "custid985135"); keyBuilder.addChild(AccountInfo.class.getSimpleName(), "acctidX142516"); Key key = keyBuilder.getKey(); AccountInfo acct = new AccountInfo(); acct.setKey(key); pm.makePersistent(acct);

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  • need help with Java solution /newbie

    - by Racket
    Hi, I'm new to programming in general so i'm trying to be as specific as possible in this question. There's this book that i'm doing some exercises on. I managed to do more than half of what they say, but it's just one input that I have been struggling to find out. I'll write the question and thereafter my code, "Write an application that creates and prints a random phone number of the form XXX-XXX-XXXX. Include the dashes in the output. Do not let the first three digits contain an 8 or 9 (but don't be more restrictive than that), and make sure that the second set of three digits is not greater than 742. Hint: Think through the easiest way to construct the phone number. Each diigit does not have to be determined separately." OK, the highlighted sentence is what i'm looking at. Here's my code: import java.util.Random; public class PP33 { public static void main (String[] args) { Random rand = new Random(); int num1, num2, num3; num1 = rand.nextInt(900) + 100; num2 = rand.nextInt(643) + 100; num3 = rand.nextInt(9000) + 1000; System.out.println(num1+"-"+num2+"-"+num3); } } How am I suppose to do this? I'm on chapter 3 so we have not yet discussed if statements etcetera, but Aliases, String class, Packages, Import declaration, Random Class, Math Class, Formatting output (decimal- & numberFormat), Printf, Enumeration & Wrapper classes + autoboxing. So consider answer the question based only on these assumptions, please. The code doesn't have any errors. Thank you!

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  • using STI and ActiveRecordBase<> with full FindAll

    - by oillio
    Is it possible to use generic support with single table inheritance, and still be able to FindAll of the base class? As a bonus question, will I be able to use ActiveRecordLinqBase< as well? I do love those queries. More detail: Say I have the following classes defined: public interface ICompany { int ID { get; set; } string Name { get; set; } } [ActiveRecord("companies", DiscriminatorColumn="type", DiscriminatorType="String", DiscriminatorValue="NA")] public abstract class Company<T> : ActiveRecordBase<T>, ICompany { [PrimaryKey] private int Id { get; set; } [Property] public String Name { get; set; } } [ActiveRecord(DiscriminatorValue="firm")] public class Firm : Company<Firm> { [Property] public string Description { get; set; } } [ActiveRecord(DiscriminatorValue="client")] public class Client : Company<Client> { [Property] public int ChargeRate { get; set; } } This works fine for most cases. I can do things like: var x = Client.FindAll(); But sometimes I want all of the companies. If I was not using generics I could do: var x = (Company[]) FindAll(Company); Client a = (Client)x[0]; Firm b = (Firm)x[1]; Is there a way to write a FindAll that returns an array of ICompany's that can then be typecast into their respective types? Something like: var x = (ICompany[]) FindAll(Company<ICompany>); Client a = (Client)x[0]; Or maybe I am going about implementing the generic support all wrong?

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  • Why does GetWindowThreadProcessId return 0 when called from a service

    - by Marve
    When using the following class in a console application, and having at least one instance of Notepad running, GetWindowThreadProcessId correctly returns a non-zero thread id. However, if the same code is included in a Windows Service, GetWindowThreadProcessId always returns 0 and no exceptions are thrown. Changing the user the service launches under to be the same as the one running the console application didn't alter the result. What causes GetWindowThreadProcessId to return 0 even if it is provided with a valid hwnd? And why does it function differently in the console application and the service? Note: I am running Windows 7 32-bit and targeting .NET 3.5. public class TestClass { [DllImport("user32.dll")] static extern uint GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId); public void AttachToNotepad() { var processesToAttachTo = Process.GetProcessesByName("Notepad") foreach (var process in processesToAttachTo) { var threadID = GetWindowThreadProcessId(process.MainWindowHandle, IntPtr.Zero); .... } } } Console Code: class Program { static void Main(string[] args) { var testClass = new TestClass(); testClass.AttachToNotepad(); } } Service Code: public class TestService : ServiceBase { private TestClass testClass = new TestClass(); static void Main() { ServiceBase.Run(new TestService()); } protected override void OnStart(string[] args) { testClass.AttachToNotepad(); base.OnStart(args); } protected override void OnStop() { ... } }

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  • event.stopPropagation(); doesn't behave as expected

    - by Ciprian Amaritei
    I read couple articles related to event.stopPropagation(); but none of the solutions provided works for me. Basically what I have is an accordion widget with all the elements collapsed by default. On each element header (dt tag) there is also a checkbox. Clicking the checkbox shouldn't trigger the accordion to make its elements expand. <dt data-toggle="collapse"> <span class="subscribe-checkbox"><button type="button" class="btn toggle-btn" data-toggle="button"></button></span> </dt> <dd> <p>Accordion content...</p> </dd> Clicking the span (which should act as a checkbox ) should add class "checked" to it. However it also expands the accordion element (dd tag). What I'm doing in jQuery is: $('.accordion-group .btn.toggle-btn').click(function (event) { event.stopPropagation(); }); While the accordion content isn't shown ( which is good) the element doesn't change class either, so it doesn't become 'checked'. I tried with .live() too and didn't work either. Thanks in advance, Ciprian.

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  • Intro Bar like stack overflow

    - by Dasa
    I have a simple top bar using jquery like the one on stackoverflow, but i want it to only appear on the first time a person visits the website. below is the HTML followed by the "bxSlider.js" file <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script> <script type="text/javascript" src="bxSlider.js"></script> <title>topbar</title> <style type="text/css" media="screen"> #message { font-family:Arial,Helvetica,sans-serif; position:fixed; top:0px; left:0px; width:100%; z-index:105; text-align:center; color:white; padding:2px 0px 2px 0px; background-color:#8E1609; } #example1 { text-align: center; width: 80%; } .close-notify { white-space: nowrap; float:right; margin-right:10px; color:#fff; text-decoration:none; padding-left:3px; padding-right:3px } .close-notify a { color: #fff; } h4, p { margin:0px; padding:0px; } </style> </head> <body> <DIV ID='message' style="display: none;"> <DIV ID="example1"> <DIV CLASS="item"> <h4>Head 1</h4> <p>Text 1</p> </div><!-- end item --> <DIV CLASS="item"> <h4>Head 2</h4> <p>Text 2</p> </div><!-- end item --> </div><!-- end example1 --> <a href="#" CLASS="close-notify" onclick="closeNotice()">X</a> </div> <script type="text/javascript"> $(document).ready(function() { $("#message").fadeIn("slow"); $('#example1').bxSlider({ mode: 'slide', speed: 250, wrapper_CLASS: 'example1_container' }); }); function closeNotice() { $("#message").fadeOut("slow"); } </script> </body> </html> /** * * * bxSlider: Content slider / fade / ticker using the jQuery javascript library. * * Author: Steven Wanderski * Email: [email protected] * URL: http://bxslider.com * * **/ jQuery.fn.bxSlider = function(options){ ///////////////////////////////////////////////////////////////////////////////////////////////////////////// // Declare variables and functions ///////////////////////////////////////////////////////////////////////////////////////////////////////////// var defaults = { mode: 'slide', speed: 500, auto: false, auto_direction: 'left', pause: 2500, controls: true, prev_text: 'prev', next_text: 'next', width: $(this).children().width(), prev_img: '', next_img: '', ticker_direction: 'left', wrapper_class: 'container' }; options = $.extend(defaults, options); if(options.mode == 'ticker'){ options.auto = true; } var $this = $(this); var $parent_width = options.width; var current = 0; var is_working = false; var child_count = $this.children().size(); var i = 0; var j = 0; var k = 0; function animate_next(){ is_working = true; $this.animate({'left':'-' + $parent_width * 2 + 'px'}, options.speed, function(){ $this.css({'left':'-' + $parent_width + 'px'}).children(':first').appendTo($this); is_working = false; }); } function animate_prev(){ is_working = true; $this.animate({'left': 0}, options.speed, function(){ $this.css({'left':'-' + $parent_width + 'px'}).children(':last').insertBefore($this.children(':first')); is_working = false; }); } function fade(direction){ if(direction == 'next'){ var last_before_switch = child_count - 1; var start_over = 0; var incr = k + 1; }else if(direction == 'prev'){ var last_before_switch = 0; var start_over = child_count -1; var incr = k - 1; } is_working = true; if(k == last_before_switch){ $this.children().eq(k).fadeTo(options.speed, 0); $this.children().eq(start_over).fadeTo(options.speed, 1, function(){ is_working = false; k = start_over; }); }else{ $this.children().eq(k).fadeTo(options.speed, 0); $this.children().eq(incr).fadeTo(options.speed, 1, function(){ is_working = false; k = incr; }); } } function add_controls(){ ///////////////////////////////////////////////////////////////////////////////////////////////////////////// // Check if user selected images to use for next / prev ///////////////////////////////////////////////////////////////////////////////////////////////////////////// if(options.prev_img != '' || options.next_img != ''){ $this.parent().append('<a class="slider_prev" href=""><img src="' + options.prev_img + '" alt=""/></a><a class="slider_next" href=""><img src="' + options.next_img + '" alt="" /></a>'); }else{ $this.parent().append('<a class="slider_prev" href="">' + options.prev_text + '</a><a class="slider_next" href="">' + options.next_text + '</a>'); } $this.parent().find('.slider_prev').css({'float':'left', 'outline':'0', 'color':'yellow'}); $this.parent().find('.slider_next').css({'float':'right', 'outline':'0', 'color':'yellow'}); ///////////////////////////////////////////////////////////////////////////////////////////////////////////// // Accomodate padding-top for controls when elements are absolutely positioned (only in fade mode) ///////////////////////////////////////////////////////////////////////////////////////////////////////////// if(options.mode == 'fade'){ $this.parent().find('.slider_prev').css({'paddingTop' : $this.children().height()}) $this.parent().find('.slider_next').css({'paddingTop' : $this.children().height()}) } ///////////////////////////////////////////////////////////////////////////////////////////////////////////// // Actions when user clicks next / prev buttons ///////////////////////////////////////////////////////////////////////////////////////////////////////////// $this.parent().find('.slider_next').click(function(){ if(!is_working){ if(options.mode == 'slide'){ animate_next(); if(options.auto){ clearInterval($.t); $.t = setInterval(function(){animate_next();}, options.pause); } }else if(options.mode == 'fade'){ fade('next'); if(options.auto){ clearInterval($.t); $.t = setInterval(function(){fade('next');}, options.pause); } } } return false; }); $this.parent().find('.slider_prev').click(function(){ if(!is_working){ if(options.mode == 'slide'){ animate_prev(); if(options.auto){ clearInterval($.t); $.t = setInterval(function(){animate_prev();}, options.pause); } }else if(options.mode == 'fade'){ fade('prev'); if(options.auto){ clearInterval($.t); $.t = setInterval(function(){fade('prev');}, options.pause); } } } return false; }); } function ticker() { if(options.ticker_direction == 'left'){ $this.animate({'left':'-' + $parent_width * 2 + 'px'}, options.speed, 'linear', function(){ $this.css({'left':'-' + $parent_width + 'px'}).children(':first').appendTo($this); ticker(); }); }else if(options.ticker_direction == 'right'){ $this.animate({'left': 0}, options.speed, 'linear', function(){ $this.css({'left':'-' + $parent_width + 'px'}).children(':last').insertBefore($this.children(':first')); ticker(); }); } } ///////////////////////////////////////////////////////////////////////////////////////////////////////////// // Create content wrapper and set CSS ///////////////////////////////////////////////////////////////////////////////////////////////////////////// $this.wrap('<div class="' + options.wrapper_class + '"></div>'); //console.log($this.parent().css('paddingTop')); if(options.mode == 'slide' || options.mode == 'ticker'){ $this.parent().css({ 'overflow' : 'hidden', 'position' : 'relative', 'margin' : '0 auto', 'width' : options.width + 'px' }); $this.css({ 'width' : '999999px', 'position' : 'relative', 'left' : '-' + $parent_width + 'px' }); $this.children().css({ 'float' : 'left', 'width' : $parent_width }); $this.children(':last').insertBefore($this.children(':first')); }else if(options.mode == 'fade'){ $this.parent().css({ 'overflow' : 'hidden', 'position' : 'relative', 'width' : options.width + 'px' //'height' : $this.children().height() }); if(!options.controls){ $this.parent().css({'height' : $this.children().height()}); } $this.children().css({ 'position' : 'absolute', 'width' : $parent_width, 'listStyle' : 'none', 'opacity' : 0 }); $this.children(':first').css({ 'opacity' : 1 }); } ///////////////////////////////////////////////////////////////////////////////////////////////////////////// // Check if user selected "auto" ///////////////////////////////////////////////////////////////////////////////////////////////////////////// if(!options.auto){ add_controls(); }else{ if(options.mode == 'ticker'){ ticker(); }else{ ///////////////////////////////////////////////////////////////////////////////////////////////////////////// // Set a timed interval ///////////////////////////////////////////////////////////////////////////////////////////////////////////// if(options.mode == 'slide'){ if(options.auto_direction == 'left'){ $.t = setInterval(function(){animate_next();}, options.pause); }else if(options.auto_direction == 'right'){ $.t = setInterval(function(){animate_prev();}, options.pause); } }else if(options.mode == 'fade'){ if(options.auto_direction == 'left'){ $.t = setInterval(function(){fade('next');}, options.pause); }else if(options.auto_direction == 'right'){ $.t = setInterval(function(){fade('prev');}, options.pause); } } if(options.controls){ add_controls(); } } } }

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  • How do I interact with a Perl object that has a hash attribute?

    - by brydgesk
    I have a class with several variables, one of which is a hash (_runs): sub new { my ($class, $name) = @_; my $self = { _name => $name, ... _runs => (), _times => [], ... }; bless ($self, $class); return $self; } Now, all I'm trying to do is create an accessor/mutator, as well as another subroutine that pushes new data into the hash. But I'm having a hell of a time getting all the referencing/dereferencing/$self calls working together. I've about burned my eyes out with "Can't use string ("blah") as a HASH ref etc etc" errors. For the accessor, what is 'best practice' for returning hashes? Which one of these options should I be using (if any)?: return $self->{_runs}; return %{ $self->{_runs} }; return \$self->{_runs}; Further, when I'm using the hash within other subroutines in the class, what syntax do I use to copy it? my @runs = $self->{_runs}; my @runs = %{ $self->{_runs} }; my @runs = $%{ $self->{_runs} }; my @runs = $$self->{_runs}; Same goes for iterating over the keys: foreach my $dt (keys $self->{_runs}) foreach my $dt (keys %{ $self->{_runs} }) And how about actually adding the data? $self->{_runs}{$dt} = $duration; %{ $self->{_runs} }{$dt} = $duration; $$self->{_runs}{$dt} = $duration; You get the point. I've been reading articles about using classes, and articles about referencing and dereferencing, but I can't seem to get my brain to combine the knowledge and use both at the same time. I got my _times array working finally, but mimicking my array syntax over to hashes didn't work.

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  • Does C# allow method overloading, PHP style (__call)?

    - by mr.b
    In PHP, there is a special method named __call($calledMethodName, $arguments), which allows class to catch calls to non-existing methods, and do something about it. Since most of classic languages are strongly typed, compiler won't allow calling a method that does not exist, I'm clear with that part. What I want to accomplish (and I figured this is how I would do it in PHP, but C# is something else) is to proxy calls to a class methods and log each of these calls. Right now, I have code similar to this: class ProxyClass { static logger; public AnotherClass inner { get; private set; } public ProxyClass() { inner = new AnotherClass(); } } class AnotherClass { public void A() {} public void B() {} public void C() {} // ... } // meanwhile, in happyCodeLandia... ProxyClass pc = new ProxyClass(); pc.inner.A(); pc.inner.B(); // ... So, how can I proxy calls to an object instance in extensible way? Extensible, meaning that I don't have to modify ProxyClass whenever AnotherClass changes. In my case, AnotherClass can have any number of methods, so it wouldn't be appropriate to overload or wrap all methods to add logging. I am aware that this might not be the best approach for this kind of problem, so if anyone has idea what approach to use, shoot. Thanks!

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  • Creating a three level ASP.NET menu with SiteMap, how do i do it?

    - by user270399
    I want to create a three level menu, I have got a recursive function today that works with three levels. But the thing is how do i output the third lever? Using two repeaters i have managed to get a hold of the first two levels through the ChildNodes property. But that only gives me the second level. What if a want the third level? Example code below. How do i get the third level? :) <asp:Repeater ID="FirstLevel" DataSourceID="SiteMapDataSource" runat="server" EnableViewState="false"> <ItemTemplate> <li class="top"> <a href='/About/<%#Eval("Title")%>.aspx' class="top_link"><span class="down"><%#Eval("Title")%></span><!--[if gte IE 7]><!--></a><!--<![endif]--> <asp:Repeater runat="server" ID="SecondLevel" DataSource='<%#((SiteMapNode)Container.DataItem).ChildNodes%>'> <HeaderTemplate><!--[if lte IE 6]><table><tr><td><![endif]--><ul class="sub"></HeaderTemplate> <ItemTemplate> <li> <a href='<%#((string)Eval("Url")).Replace("~", "")%>' style="text-align: left;"><%#Eval("Title")%></a> Third repeater here? </li> </ItemTemplate> <FooterTemplate></ul><!--[if lte IE 6]></td></tr></table></a><![endif]--></FooterTemplate> </asp:Repeater> </li> </ItemTemplate> </asp:Repeater>

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  • What is the difference between Unidirectional and Bidirectional associations?

    - by hguser
    Hi: What is the difference between Unidirectional and Bidirectional associations? Since the table generated in the db are all the same,so the only difference I found is that each side of the bidiretional assocations will have a refer to the other,and the unidirectional not. /////////// This is a Unidirectional association public class User { private int id; private String name; @ManyToOne @JoinColumn( name = "groupId") private Group group; } public class Group { private int id; private String name; } ////////////// The Bidirectional association public class User { private int id; private String name; @ManyToOne @JoinColumn( name = "groupId") private Group group; } public class Group { private int id; private String name; @OneToMany(mappedBy="group") private List<User> users; } The difference is wheather the group hold a refer of the user. So I wonder if this is the only difference? which is recommended?

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  • Jquery Returning values to original

    - by Cam
    So my script works perfectly, but here is the issue, I have buttons (Sprite action here) that are 40px height, but the top 20 only shows perfectly. When you click the button ie img the bottom 20px show perfecto! but... Issue, i included in my script a way to return all others to there default (only one should be selected) now, how can I fix this issue that I seem unable to correct as I can select multiple of them ** USERS can switch ** The last part of the script that is the issue. Thanks $(document).ready(function() { $('.form_sub').hide(); $('.theader').addClass('active'); $('.theader_t').click(function() { $('.form_header').show(); $('.form_sub').hide(); $('.theader').addClass('active'); $('.sub_theader').removeClass('active'); }); $('.sub_theader_t').click(function() { $('.form_header').hide(); $('.form_sub').show(); $('.theader').removeClass('active'); $('.sub_theader').addClass('active'); }); $('.top_head_img').click(function() { $(this).css({ position: 'relative', bottom: '20px' }).siblings().css( 'bottom', '0' ); }); }); <ul class="top_head"> <li> <a href="javascript:void(0)" onClick="selectPic5('top');"><img src="custom/images/top2.jpg" alt="Left" border="0" class="top_head_img"/></a> </li> <li> <a href="javascript:void(0)" onClick="selectPic5('center');"><img src="custom/images/mid2.jpg" alt="Center" border="0" class="top_head_img"/></a> </li> <li> <a href="javascript:void(0)" onClick="selectPic5('bottom');"><img src="custom/images/bot2.jpg" alt="Right" border="0" class="top_head_img"/></a> </li> </ul>

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