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• NSManagedObjectID into NSData

  - by papr

  I found this wonderful NSManagedObjectID. This would be very good for referencing an Entity/NSManagedObject/NSEntityDescription, right? Let's get an ID from an entity: NSEntityDescription *entity = [self newEntity]; NSManagedObjectID *objID = [entity objectID]; So... any idea how to get this objID into a string? Or better: NSData. Actually something to be able to save it to the NSUserDefaults. ;-) Btw: NSFetchRequest doesn't want to work in my case. I use an modified version of this example: answer of an old question.

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• SQL Server 2005: When clicking "Add" database I keep getting 'verify that the path or file exists'

  - by Code Sherpa

  When I right click on "databases" in Sql Server 2005 Management Studio and then Attach... Add I get the following error: C:\Documents and Settings\Administrator\My Documents\SQL Server Management Studio\ Projects\Path\To\MDF\And\LDF\Files\ cannot access the specified path or file on the server. Verify that you have the necessary security privileges and that the path or file exists. The answer is easy - the MDF and LDF files where removed when Nant (by way of my dev machine) issued a drop command. But, after replacing the MDF and LDF files, I want to reattach the database but the above error keeps coming up when I select "Add". Also, I have already "unattached" the database in question and it no longer appears on the left under "databases". I have tried to replace a copy of the MDF and LDF files in the folder being referenced and that didn't work. Any ideas as to how to gracefully get rid of this error?

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• Save Values AUTOMATICALLY with NSUserDefaults

  - by Edouard Tarter

  I have an app with two UITextFields, where the user enters an integer, and then a method is called with the values the user enters. But when I completely close the app, the values are deleted. I want to change it to save the value the user entered when it closes, and loads it up when the app is re-opened. I tried this with NSUserDefault, and it worked fine (with save and load button), but I want it to make it automatically, without pressing any buttons. I saw some other people do it with the basic methods in the AppDelegate.m, but I don't know anything about that, therefore I didn't understand it at all. I saw MANY tutorials online, but I didn't understand any of them, please help, and give a detailed answer, thanks :)

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• How do you run a .bat file from PHP?

  - by undefined

  Can anyone tell me how to execute a .bat file from a PHP script? I have tried - exec("C:[path to file]"); system("C:[path to file]"); nothing is working. Ive checked the PHP manuals and googled around but cant find a good answer. Anyone know where im going wrong? I'm running windows 2003 server and have successfully manually ran the .bat file and it does what i need it to, I just need to be able to launch it programatically. thanks

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• is it possible to create a multi-project template that references n number of existing projects and

  - by jcollum

  The situation: I need to create about 40+ solutions that all reference 3 projects and have one project that is unique to each one. I'd like to create a multi-project template that does this, but from what I've read it looks like it's very difficult or impossible (related SO question, but doesn't answer). I want my solution to look like this (names changed of course): These three are used by all solutions created under this "family": MyCompany.Extensions MyCompany.MyProject.Tests.Shared MyCompany.MyProject.Scripts This one is the one that makes the solution unique, 123, 124, 125 etc: MyCompany.MyProject.Tests.Unit123 Is it possible to set up a multi-project template that will generate this structure? References: MSDN Create Multi Project Templates

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• Java : Count even values in a Binary Search Tree recursively

  - by user307682

  Hi, I need to find out how many even values are contained in a binary tree. this is my code. private int countEven(BSTNode root){ if ((root == null)|| (root.value%2==1)) return 0; return 1+ countEven(root.left) + countEven(root.right); } this i just coded as i do not have a way to test this out. I'm not able to test it out at the moment but need an answer so badly. any help is deeply appreciated.

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• Java Double Array

  - by user1062058

  I'm having trouble setting up and placing values into an array using a text file containing the floating point numbers 2.1 and 4.3 each number is separated by a space - below is the error I'm getting: Exception in thread "main" java.util.NoSuchElementException import java.util.*; import java.io.*; public class DoubleArray { public static void main(String[] args) throws FileNotFoundException { Scanner in = new Scanner(new FileReader("mytestnumbers.txt")); double [] nums = new double[2]; for (int counter=0; counter < 2; counter++) { int index = 0; index++; nums[index] = in.nextDouble(); } } } Thanks, I'm sure this isn't a hard question to answer... I appreciate your time.

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• Server Side code Pushing Data to client Browser while current thread is busy Comet (programming)

  - by h_power11

  Hello Friends, I am writing one simple web page with bunch of textboxes and a button control. Now when user finished editing the values on this text boxes user has to click the button and this button invoke heavily process intensive algorithm on server side code based on the data received from client (Textboxes) And it could some time takes up to 30 to 45 minutes to complete the whole operation so the current thread is still inside the button click event handler function. That background task only provides one event, and the web page subscribes to it to get some text data after each stage of processing I was wandering if there is any way I can keep user up-to-date with what is the current progress on that background task. I have div element to print the current status information So I am looking for some sort of reverse mechanism then "get" and "post". I have read some articles on the Comet (programming) but I can't find any easy or definitive answer Thanks in advance

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• What is the best instance type to use for hosting a website on ec2?

  - by Josh

  Amazon offers two instance types on EC2: 1) On-Demand and 2) Reserved. After reading the docs on these, I don't really understand the difference from an end-user perspective. More specifically, I'd like to know the answer to this question: is one or the other better for web applications? Based on their names and descriptions, it seems as though on-demand instances may get wiped away from the server altogether if they're not in use which means that they need to be restarted when a request finally does come in. That seems like a pretty bad thing for a website. Am I just misinterpreting the docs? Thanks!

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• MYSQL: COUNT with GROUP BY, LEFT JOIN and WHERE clause doesn't return zero values

  - by Paul Norman

  Hi guys, thanks in advance for any help on this topic! I'm sure this has a very simply answer, but I can't seem to find it (not sure what to search on!). A standard count / group by query may look like this: SELECT COUNT(`t2`.`name`) FROM `table_1` `t1` LEFT JOIN `table_2` `t2` ON `t1`.`key_id` = `t2`.`key_id` GROUP BY `t1`.`any_col` and this works as expected, returning 0 if no rows are found. So does: SELECT COUNT(`t2`.`name`) FROM `table_1` `t1` LEFT JOIN `table_2` `t2` ON `t1`.`key_id` = `t2`.`key_id` WHERE `t1`.`another_column` = 123 However: SELECT COUNT(`t2`.`name`) FROM `table_1` `t1` LEFT JOIN `table_2` `t2` ON `t1`.`key_id` = `t2`.`key_id` WHERE `t1`.`another_column` = 123 GROUP BY `t1`.`any_col` only works if there is at least one row in table_1 and fails miserably returning an empty result set if there are zero rows. I would really like this to return 0! Anyone enlighten me on this? Beer can be provided in exchange if you are in London ;-)

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• javascript code to prevent screensaver from starting

  - by gertjan

  Hi all, I am completely new to javascript programming and I have a question that I didn't manage to find an answer for anywhere. I have recently put together a simple slideshow to view the photos remotely that I host on my home computer. This by itself works fine. The problem I run into is that when I'm viewing photos I don't interact with the hardware, which after some time causes the monitor to switch off. This is particularly annoying when watching photos on my mobile phone. My question is: is there a way to prevent this from happening? I am thinking in the direction of faking a mouse or other event every time I refresh the photo, but I have no clue how to do that and if it is possible. Any help is greatly appreciated!

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• The *right* JSON content type?

  - by Oli

  Right I've been messing around with JSON for some time, just pushing it out as text and it hasn't hurt anybody (I know of), but I'd like to start doing things properly. I have seen so many purported "standards" for the JSON content type: application/json application/x-javascript text/javascript text/x-javascript text/x-json But which is right? Or best? I gather that there are security and browser support issues varying between them... (I know there's a similar question, What MIME type if JSON is being returned by a REST API?, but I'd like a slightly more targeted answer.)

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• Writing loops with i++ or ++i [duplicate]

  - by Nonesuch

  This question already has an answer here: Why use ++i instead of i++ in cases where the value is not used anywhere else in the statement? 6 answers format of for loops 31 answers I have a question about writing loops. I always begin with (int i=0; i<10; i++) But I see many experts begin with (int i=0; i<10; ++i) Is there there any real difference, or they are same? Of course, I know the difference between pre-increment and post-increment. I mean which one I should use when writing the loop? or it depends. Thanks!

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• Why is the destructor of the class called twice ?

  - by dicaprio

  Apologies if the question sounds silly, I was following experts in SO and trying some examples myself, and this is one of them. I did try the search option but didn't find an answer for this kind. class A { public: A(){cout<<"A Contruction"<<endl;} ~A(){cout<<"A destruction"<<endl;} }; int main() { vector<A> t; t.push_back(A()); // After this line, when the scope of the object is lost. } Why is the destructor of the class called twice ?

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• How to remove "index.php?" from HTACCESS [duplicate]

  - by Francis Goris

  This question already has an answer here: Reference: mod_rewrite, URL rewriting and “pretty links” explained 2 answers I have url like this: www.site.com/index.php?/genero/aventura/av/ But I would like this to be my new url: site.com/genero/aventura/av/ I used the following code: <IfModule mod_rewrite.c>RewriteEngine On RewriteCond %{HTTP_HOST} !^www.site.com/$ [NC] RewriteRule ^index.php\?/(.*)$ site.com/$1 [R=301,L] </IfModule> but only returns me: site.com/index.php?/genero/aventura/av/ This is my latest & full version: RewriteEngine on #RewriteCond $1 !^(index\.php|ver_capitulo\.html|google3436eb8eea8b8d6e\.html|BingSiteAuth\.xml |portadas|public|mp3|css|favicon\.ico|js|plantilla|i|swf|plugins|player\.swf|robots\.txt) RewriteCond $1 !^(index\.php|public|css|js|i|feed|portadas|robots\.txt|BingSiteAuth\.xml|plugins|i|mp3|favicon\.ico|pluginslist\.xml|google3436eb8eea8b8d6e\.html) RewriteRule ^(.*)$ /index.php?/$1 [L] #DirectoryIndex index.php #RewriteCond %{THE_REQUEST} http://www.page.com/index\.php [NC] #RewriteRule ^(.*?)index\.php$ http://page.com/$1 [L,R=301,NC,NE] #DirectoryIndex index.php #RewriteEngine On Thanks for reading.

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• How to select first entry of the day grouped by user in SQL

  - by mikepreble

  I've looked around and can't quite grasp the whole answer to this SQL query question needed to extract data from an MS Access 2000 table. Here's an example of what the table [Time Sub] looks like: CLIENT_ID, DATE_ENTERED, CODE, MINUTES 11111, 5/12/2008 3:50:52 PM, M, 38 11111, 5/12/2008 2:55:50 PM, M, 2 11714, 5/13/2008 1:15:32 PM, M, 28 11111, 5/13/2008 6:15:12 PM, W, 11 11112, 5/12/2008 2:50:52 PM, M, 89 11112, 5/12/2008 5:10:52 PM, M, 9 91112, 5/14/2008 1:10:52 PM, L, 96 11112, 5/12/2008 5:11:52 PM, M, 12 I need to select the first entry of each day per client that's NOT code L or W. I know this can be done in a SQL statement, but I just can't figure out how. I can get close, but never come up with the right output. Any help is appreciated. Thanks, Mike

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• Getting a java collection of objects in Alphabetical order

  - by MichaelMcCabe

  I have a question that I dont really know where to start. So I thought i'd ask it here. Basically, I have a drop down with names in it. I want these names to be in alphabetical order. Populating the drop down happens as follows; I query a database and pull down an Id and Name, make a object called "UserList", and set the name and id variables with what I get back. I then add this object to an ArrayList. I do this over and over. I then convert this collection to an array, and pass it to my JSP page using session.setAttribute("userList", UserList); I then populate the drop down as below. <c:forEach items="${usersCompanysList}" var="c" > There probably is a simple answer but how to I sort these names?

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• one-liner if statements...

  - by snickered

  Total noob here so be gentle. I've looked everywhere and can't seem to find the answer to this. How do I condense the following? if (expression) { return true; } else { return false; } I can't get it to work since it's returning something vs. setting something. I've already seen things like this: somevar = (expression) ? value1 : value2; Like I said, please be gentle :)

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• Oracle Hibernate with in Netbean RCP

  - by jurnaltejo

  All, i have a problem with hibernate using netbean platform 6.8, i have been search around internet, but cannot found the suitable answer This is my story. i am using oracle database as data source of my hibernate entity with ojdbc14.jar driver. First i create hibernate entity tobe wrapped latter in a netbeans module, i tested the hibernate connection configuration and everything just works well. i can connect to oracle database successfuly, every hibernate query works well. Then i wrapped that hibernate entity jar as a netbeans module, create another module to warp my ojdbc14.jar then i test it. and, im using hibernate library dependency that available on netbean platform (netbean 6.8), but unfutornatelly i got oracle sql error saying “no suitable driver for [connection url]” when running the project. thats quite weird since it doesn’t happend when I test it before with out netbean platform. i thought that is related to netbeans lazy loading issue, i am not sure,. any idea ? tq for help

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• Disable Adding Item to Collection

  - by Wonko the Sane

  Hi All, I'm sure there's an "easy" answer to this, but for the moment it escapes me. In an MVVM application, I have a property that is a ObservableCollection, used for displaying some set of elements on the view. private readonly ObservableCollection<MyType> mMyCollection = new ObservableCollection<MyType>(); public ObservableCollection<MyType> MyCollection { get { return mMyCollection; } } I want to restrict consumers of this collection from simply using the property to add to the collection (i.e. I want to prevent this from the view): viewModel.MyCollection.Add(newThing); // want to prevent this! Instead, I want to force the use of a method to add items, because there may be another thread using that collection, and I don't want to modify the collection while that thread is processing it. public void AddToMyCollection(MyType newItem) { // Do some thread/task stuff here } Thanks, wTs

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• JavaScript to enable "submit" button (doesn't work)

  - by Halst

  I need the button "submit" to be disabled unless JavaScript is on. I tried: 1. <input onLoad="this.disabled=false" id="post-comment" type="submit" value="Post Your Comment" disabled="disabled"/> 2. <input onLoad="this.removeAttribute("disabled");" id="post-comment" type="submit" value="Post Your Comment" disabled="disabled"/> 3. <input onLoad="document.getElementById("post-comment").removeAttribute("disabled");" id="post-comment" type="submit" value="Post Your Comment" disabled="disabled"/> Doesn't work. I'm new to JavaScript, but can't find answer on the net.

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• PHP, better to set the variable before if or use if/else?

  - by DssTrainer

  So a simple one that I just never could find a straight answer on. What is better (performance or otherwise): $var = false; If ($a == $b) { $var = true; } or If ($a == $b) { $var = true; } else { $var = false; } I've heard arguments for both ways. I find the first cleaner to ensure I have it set, and a little less code too. The pro being that you may only need to set it once without conditional. But the con being that if the argument is true, it gets set twice. I am assuming the second way is probably best practice

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• Is void *p = 0L valid?

  - by Artefacto

  In this answer, sassman initializes a pointer with: zend_class_entry* ce = 0L; My question is – is this valid? I would say it isn't, to initialize the variable with a null pointer either an unadorned (and possibly casted to void *) 0 constant, or some macro that evaluates to that such as NULL should be used. However, I can't find definitive language in the standard that supports this interpretation. All it says is: An integer constant expression with the value 0, or such an expression cast to type void *, is called a null pointer constant.

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• ASP.Net Gridview, How to activate Edit Mode based on ID (DataKey)

  - by Jon P

  I have a page, lets call it SourceTypes.aspx, that has a a GridView that is displaying a list of Source Types. Part of the GridView is a DataKey, SourceTypeID. If source TypeID is passed to the page via a query sting, how to I put the Gridview into Edit mode for the appropriate row based on the SourceTypeID? The GridView is bound to a SQlDataSource object. I have a feeling I am going to kick myself when the answer appears!! I have looked at Putting a gridview row in edit mode programmatically but it is some what lacking in specifics

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• "public" or "private" attribute in Python ? What is the best way ?

  - by SeyZ

  Hi ! In Python, I have the following example class : class Foo: self._attr = 0 @property def attr(self): return self._attr @attr.setter def attr(self, value): self._attr = value @attr.deleter def attr(self): del self._attr As you can see, I have a simple "private" attribute "_attr" and a property to access it. There is a lot of codes to declare a simple private attribute and I think that it's not respecting the "KISS" philosophy to declare all attributes like that. So, why not declare all my attributes as public attributes if I don't need a particular getter/setter/deleter ? My answer will be : Because the principle of encapsulation (OOP) says otherwise! What is the best way ? Thanks !

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