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• Eclipse error: This project needs to migrate WTP metadata

  - by larf311

  We started a Web Project in Eclipse 3.2 a ways back and we've since upgraded to Eclipse 3.4 but now the Project has the error: "This project needs to migrate WTP metadata" We've tried right-clicking and doing the "quick-fix" which is in fact to Migrate WTP Metadata. Unfortunately nothing happens and the error remains. We can delete that error from the Problems and everything works as it should, however, every time we re-import the project from source control, the error re-appears. Any ideas on how to permanently get rid of this error or how to ACTUALLY migrate WTP metadata? UPDATE: Everyone, please vote on the answer that works for you rather than adding your own answer that references a previous person's answer.

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• Problems persisting Core Data structures on iPhone/iPad

  - by Rivier

  I have an iPhone/iPad app using Core Data to keep my application data. Sometimes, even though I don't get any error messages, the data is not really saved so when the app starts anew, it's all gone. This problem seems to disappear after physically rebooting the device, but otherwise it's pretty random and hard to track. Has anyone seen a similar issue? Also, it seems to happen more often in the iPhone 1st generation, less so in the 3G/3GS, and seldom in the iPad. Very strange...

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• Cuda program results are always zero in HW, correct in EMU??

  - by Orion Nebula

  Hi all! I am having a weird problem .. I have written a CUDA code which executes correctly in emulation and all results show up.. however, when executed on hardware "G210" .. the results in the result memory are always 0 I am passing two vectors to the kernel, one with random variables the other is initialized to zero, the code copies the first vector to shared memory, does some swapping and other operations and then writes back the results on the second vector (the one with the initial 0's) I am using double precision, the -arch sm13 flag is used, all memory allocation also use sizeof(double) .. I have checked if the kernel is invoked, it does .. so no problems here .. the cudaMemCpy has no problems .. what could be the problem .. :( why would it work in emulation but not on HW I am quite confused .. any ideas?

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• C++ struct containing unsigned char and int bug

  - by powerfear

  Ok i have a struct in my C++ program that is like this: struct thestruct { unsigned char var1; unsigned char var2; unsigned char var3[2]; unsigned char var4; unsigned char var5[8]; int var6; unsigned char var7[4]; }; When i use this struct, 3 random bytes get added before the "var6", if i delete "var5" it's still before "var6" so i know it's always before the "var6". But if i remove the "var6" then the 3 extra bytes are gone. If i only use a struct with a int in it, there is no extra bytes. So there seem to be a conflict between the unsigned char and the int, how can i fix that?

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• JQuery animation

  - by Ravindra Soni

  I am using following code for animation using jquery. When I click on a list element, the corresponding div slides down and opacity goes to '1'. When I click other list element, the previous one goes up and fades, and the next one come down. var id_prev; var id_new; $("#tag ul li ").click(function(event){ var i = $(this).index()+1; var id_new="#person"+i; if(id_new != id_prev){ $(id_prev).animate({top:'300px',opacity:'0'},500); $(id_prev).delay(200).css({'z-index':'0'}); $(id_new).delay(200).css({'z-index':'300'}); $(id_new).delay(200).animate({top:'300px',opacity:'0'},500); $(id_new).delay(200).animate({top:'330px',opacity:'1'},500); id_prev = id_new; } });

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• to get columns from Excel files using Apache POI??

  - by posdef

  Hi, In order to do some statistical analysis I need to extract values in a column of an Excel sheet. I have been using the Apache POI package to read from Excel files, and it works fine when one needs to iterate over rows. However I couldn't find anything about getting columns neither in the API (link text) nor through google searching. As I need to get max and min values of different columns and generate random numbers using these values, so without picking up individual columns, the only other option is to iterate over rows and columns to get the values and compare one by one, which doesn't sound all that time-efficient. Any ideas on how to tackle this problem? Thanks,

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• Passing a Structure containing an array of String and an array of Integer into a C++ DLL

  - by DanJunior

  I'm having problems with marshaling in VB.NET to C++, here's the code : In the C++ DLL : struct APP_PARAM { int numData; LPCSTR *text; int *values; }; int App::StartApp(APP_PARAM params) { for (int i = 0; i < numLines; i++) { OutputDebugString(params.text[i]); } } In VB.NET : <StructLayoutAttribute(LayoutKind.Sequential)> _ Public Structure APP_PARAM Public numData As Integer Public text As System.IntPtr Public values As System.IntPtr End Structure Declare Function StartApp Lib "AppSupport.dll" (ByVal params As APP_PARAM) As Integer Sub Main() Dim params As APP_PARAM params.numData = 3 Dim text As String() = {"A", "B", "C"} Dim textHandle As GCHandle = GCHandle.Alloc(text) params.text = GCHandle.ToIntPtr(textHandle) Dim values As Integer() = {10, 20, 30} Dim valuesHandle As GCHandle = GCHandle.Alloc(values) params.values = GCHandle.ToIntPtr(heightHandle) StartApp(params) textHandle.Free() valuesHandle.Free() End Sub I checked the C++ side, the output from the OutputDebugString is garbage, the text array contains random characters. What is the correct way to do this?

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• Mutual Information / Entropy Calculation Help

  - by Fillip

  Hi, Hoping someone can give me some pointers with this entropy problem. Say X is chosen randomly from the uniform integer distribution 0-32 (inclusive). I calculate the entropy, H(X) = 32 bits, as each Xi has equal probability of occurring. Now, say the following pseudocode executes. int r = rand(0,1); // a random integer 0 or 1 r = r * 33 + X; How would I work out the mutual information between the two variables r and X? Mutual Information is defined as I(X; Y) = H(X) - H(X|Y) but I don't really understand how to apply the conditional entropy H(X|Y) to this problem. Thanks

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• Actionscript 3 while loop with indexOf

  - by Hanpan

  Hi, Is there any reason why this loop is getting stuck? I can't quite get my head around it: var i:Number = -1; do { i = Math.round(Math.random() * _totalQuestions); } while(_usedQuestions.indexOf(i)); Where _usedQuestions is an array of numbers. This array starts empty. Thanks! Edit: I want the loop to end if i is NOT found in the array.. this way I know the question I have selected has not previously been asked.

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• ASP.Net delete record audit trigger

  - by Germ

  Suppose you have the following... A ASP.NET web application that calls a stored procedure to delete a record. The table has a trigger on it that will insert an audit entry each time a record is deleted. I want to be able to record in the audit entry the person who deleted the record. What would be the best way to go about achieving this? I know I could remove the trigger and have the delete stored procedure insert the audit entry prior to deleting but are there other recommeded alternative?

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• How to make Mac OS X CrashReporter invoke debugger?

  - by StasM

  I have an appache module on Mac OS X that produces random crashes. I can reproduce these crashes with certain sequence of actions, and these crashes produce Crash Reporter dialog "httpd quit unexpectedly". Is there a way to cause Crash Reporter launch debugger (xcode, gdb, anything) instead of just displaying the backtrace? I've tried running httpd under gdb with httpd -X but the crash doesn't happen then - it happens only if many httpd's are running at once, and I found no way to attach gdb to all of them at once. So I was hoping maybe I can cause CrashReporter to attach the debugger when specific process crashes - is there a way to do it?

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• How do I add multiple joins (Fetches) to a joined table using nhibernate and LINQ ?

  - by ooo

  i have these tables /entities VacationRequestDate table which has a VacationRequestId field that links with VacationRequest table VacationRequest has PersonId and RequestStatusId fields that links with Person and RequestStatus respectively. i have this query so far: IEnumerable<VacationRequestDate> dates = Session.Query<VacationRequestDate>().Fetch(r => r.VacationRequest).ThenFetch(p=>p.RequestStatus).ToList(); this works fine and joins with VacationRequest and then VacationRequest joins with RequestStatus but i can't figure out how to add an additional EAGER join to the VacationRequest table. If i add a Fetch at the end, it refers to the VacationRequestDate table If i add a ThenFetch at the end, it refers to the RequestStatus table I can't find any api that will refer to the VacationRequest table as the reference point. how would you add multiple joins to a joined table using nhibernate LINQ ?

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• A balanced binary search tree which is also a heap

  - by saeedn

  I'm looking for a data structure where each element in it has two keys. With one of them the structure is a BST and looking at the other one, data structure is a heap. With a little search, I found a structure called Treap. It uses the heap property with a random distribution on heap keys to make the BST balanced! What I want is a Balanced BST, which can be also a heap. The BST in Treap could be unbalanced if I insert elements with heap Key in the order of my choice. Is there such a data structure?

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• How much time roughly it takes to learn ASP.net programming

  - by Mirage

  I am a PHP MYSQL person but now i have got webiste to do it ASP.net. I kow nothing about ASP.NET. INitially i was thinking of ASP.NET as a programming language but now i now its not , i really don't know what it is. Someone told me that i have to do c sharp to build the website. I i have to display simple data from database how much different is c sharp from php. Does it has all function like php to echo stuff etc

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• How to generate unique number of 12 digits?

  - by DanSogaard

  I'm working on an app that sends raw data to zebra printer and print out barcodes. And since every item has its own unique barcode, I need to define a variable that automatically generates unique number of 12 digits long. see example: printBar prnt = new printBar("123456789012"); Is there anyway to define a double variable and pass it to a function that return uniqely 12 digits number and pass it over again to the printBar class?. But how to make sure everytime you access it returns a unique value?. I also thought of another way, since am using MS Access db, I can create a column of AutoNumber datatype and assign it to Random, but you don't get the exact 12 digits required, sometimes it generates a value of 10 digits sometimes more or less.

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• In C#, What is <T> After a Method Declaration?

  - by Drew

  I'm a VB.Net guy. (because I have to be, because the person who signs my check says so. :P) I grew up in Java and I don't generally struggle to read or write in C# when I get the chance. I came across some syntax today that I have never seen, and that I can't seem to figure out. In the following method declaration, what does < T represent? static void Foo < T (params T[] x) I have seen used in conjunction with declaring generic collections and things, but I can't for the life of me figure out what it does for this method. In case it matters, I came across it when thinking about some C# brain teasers. The sixth teaser contains the entire code snippet.

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• compute mean in python for a generator

  - by nmaxwell

  Hi, I'm doing some statistics work, I have a (large) collection of random numbers to compute the mean of, I'd like to work with generators, because I just need to compute the mean, so I don't need to store the numbers. The problem is that numpy.mean breaks if you pass it a generator. I can write a simple function to do what I want, but I'm wondering if there's a proper, built-in way to do this? It would be nice if I could say "sum(values)/len(values)", but len doesn't work for genetators, and sum already consumed values. here's an example: import numpy def my_mean(values): n = 0 Sum = 0.0 try: while True: Sum += next(values) n += 1 except StopIteration: pass return float(Sum)/n X = [k for k in range(1,7)] Y = (k for k in range(1,7)) print numpy.mean(X) print my_mean(Y) these both give the same, correct, answer, buy my_mean doesn't work for lists, and numpy.mean doesn't work for generators. I really like the idea of working with generators, but details like this seem to spoil things. thanks for any help -nick

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• Making a Mac double-clickable application in NetBeans

  - by skiaddict1

  I have recently moved to a MacBook Pro, which has meant leaving my beloved JBuilder 2005 behind. Since there is no such thing any more (AFAIK) as a free JBuilder, I'm having to choose a new IDE. I can't live with the code-formatting of Eclipse (yes, I know, it can be customised up the wazoo, but the fact that it will NOT respect my inserted returns means I can't live with it) so I'm seriously considering NetBeans. However, I can't find any way of getting it to build a double-clickable Mac application! (I used to use XCode for this step, but it seems that XCode no longer wants to know about Java...) I cannot be the first person who's wanted to do this...can anyone help me with advice as to how to go about it? Grateful thanks in advance

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• Bash loop command until file contains n duplicate entries (lines)

  - by Andrew

  Hello, I'm writing a script and I need to create a loop that will execute same commands until file does contain a specified number of duplicate entries. For example, with each loop I will echo random string to file results. And I want loop to stop when there are 10 lines of of the same string. I thought of something like while [ `some command here (maybe using uniq)` -lt 10 ] do command1 command2 command3 done Do you have any idea how can this problem be solved? Using grep can't be done since I don't know what string I need to look for. Thank you for your suggestions.

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• Moving and renaming files, keeping extension but include sub directories in batch file

  - by Ser1esII

  Forgive me if this is nor the place to ask these questions, I am new to batch and scripts and a bit new to these kind of posts... I have a folder that will receive files and folders, I want to run a script that looks at the directory and renames all files in each subfolder numerically, and moves them if possible. For example I have something that looks like the following Recieved_File_Folder |_folder1 | |_file1.txt | |_file2.bmp |_folder2 | |_file4.exe | |_file5.bmp |__file9.txt |__file10.jpg I would like to be able to look in every directory and move it to something like this, keeping in mind the names of the files will be random and I want to keep the extension intact also. Renamed_Folder |_folder1 | |_1.txt | |_2.bmp |_folder2 | |_1.exe | |_2.bmp |__1.txt |__2.jpg I have spent alot of time on this and am not doing too well with it, any help would be very greatly appreciated!! Thank you in advance!

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• Rails Named Scope and overlapping conditions

  - by Tumtu

  Hi everyone, have a question about rails SQL generation: class Organization < ActiveRecord::Base has_many :people named_scope :active, :conditions => { :active => 'Yes' } end class Person < ActiveRecord::Base belongs_to :organization end Rails SQL for all active people in the first organiztion Organization.first.people.active.all [4;36;1mOrganization Load (0.0ms)[0m [0;1mSELECT TOP 1 * FROM [organizations] [0m [4;35;1mPerson Load (0.0ms)[0m [0mSELECT * FROM [people] WHERE ((([people].[active] = 'Yes') AND ([people].organization_id = 1)) AND ([people].organization_id = 1)) [0m Why Rails generates "[people].organization_id = 1" condition twice ? Does someone know how to make it DRY ? e.g. SELECT * FROM [people] WHERE (([people].[active] = 'Yes') AND ([people].organization_id = 1))

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• log4net one file per run

  - by Diego Mijelshon

  I need my application to create a log file each time it runs. My preferred format would be App.log.yyyy-MM-dd_HH-mm-ss. If that's not possible, I'd settle for App.log.yyyy-MM-dd.counter This is my current appender configuration: <appender name="File" type="log4net.Appender.RollingFileAppender"> <file value="App.log"/> <rollingStyle value="Date"/> <datePattern value=".yyyy-MM-dd_HH-mm-ss"/> <staticLogFileName value="false"/> <lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> </appender> But it creates a random number of files based on the date and time.

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• How do I add netsh advfirewall context command in Visual Studio 2010 Click Once publishing?

  - by Rivers Edge

  I have a .Net 4.0 Windows application which requires access thru the firewall. I know about the netsh advfirewall firewall command, but I would like very much to have this program allowed at install time (the Click Once deployment). How can I add this command to execute as a post install command, exectuing as Administrator - i.e. The person doing the install does not have to execute the netsh advfirewall command separately or does not have to go to the Firewall and manually add the program in the Allowed list. I cannot find an area in Publish in Visual Studio 2010 to insert a post install command line execution.

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• What's wrong with my logic (Java syntax)

  - by soda

  I'm trying to make a simple program that picks a random number and takes input from the user. The program should tell the user if the guess was hot (-/+ 5 units) or cold, but I never reach the else condition. Here's the section of code: public static void giveHint (int guess) { int min = guess - 5; int max = guess + 5; if ((guess > min) && (guess < max)) { System.out.println("Hot.."); } else { System.out.println("Cold.."); } }

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• Is the a pattern for iterating over lists held by a class (dynamicly typed OO languages)

  - by Roman A. Taycher

  If I have a class that holds one or several lists is it better to allow other classes to fetch those lists(with a getter) or to implement a doXList/eachXList type method for that list that take a function and call that function on each element of the list contained by that object. I wrote a program that did a ton of this and I hated passing around all these lists sometimes with method in class a calling method in class B to return lists contained in class C, B contains a C or multiple C's (note question is about dynamically typed OO languages languages like ruby or smalltalk) ex. (that came up in my program) on a Person class containing scheduling preferences and a scheduler class needing to access them.

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