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• Multi-property "transactions" in Core Data / NSManagedObject / NSFetchedResultsController?

  - by Martijn Thé

  Hi, Is it possible to set multiple properties of an NSManagedObject and have the NSFetchedResultsController call controllerDidChangeContent: only once? In other words, is it possible to say something like: [managedObject beginChanges]; [managedObject setPropertyA:@"Foo"]; [managedObject setPropertyB:@"Bar"]; [managedObject commitChanges]; and then have the NSFetchedResultsController call controllerDidChangeContent: (and the other methods) only one time? Thanks!

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• How can I list all classes loaded in a specific class loader

  - by Yaneeve

  For debug reasons, and curiosity, I wish to list all classes loaded to a specific class loader. Seeing as most methods of a class loader are protected, what is the best way to accomplish what I want? Thanks!

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• Using a C++ class inside Javascript without an .idl

  - by Fábio

  It is possible to call methods on a class whose interface is not exposed through an .idl file? Im my particular case I'd like to use the @mozilla.org/gfx/fontmetrics;1 class, whose interface nsIFontMetrics doesn't have a correspondent .idl file.

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• How to run a single test method in simpletest unittest class ?

  - by shikhar

  This is my Unit Test class <? require_once '../simpletest/unit_tester.php'; require_once '../simpletest/reporter.php'; class Academic extends UnitTestCase { function setUp() { } function tearDown() { } function testAc1() { } function testAc4() { } function testAc7() { } } $test = new Academic(); $test->run(new HtmlReporter()); ?> When I run this script all methods viz., testAc1, testAc4, testAc7 etc are run. Is there a way to execute just a single method ? Thanks, Shikhar

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• Placeholder for UITextView

  - by Gill Bates

  Anyone ever implements something in UITextView that stopping it from receiving future inputs when the text length is smaller than certain threshold? I plan to implement a textview like we have in the mail composer interface. We have a placeholder "Subject" there, and the cursor starts after. Placeholder in UITextView Inspired from this question, I wonder if there are some methods which could be used to stop changing the text in the UITextView once the cursor is moving back to the placeholder string. Any ideas?

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• Call a block method on an iterator: each.magic.collect { ... }

  - by blinry

  I have a class with a custom each-method: class CurseArray < Array def each_safe each.do |element| unless element =~ "fuck" yield element end end end end And want to call block methods on those "selected" elements. For example: curse_array.each_safe.magic.collect {|element| "#{element} is a nice sentence."} I know there is a way to do this, but I've forgotten. Please help! :-)

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• Accessing a Windows App Object from another Class using C#.NET

  - by mouthpiec

  Hi, I have a simple windows application where I have a window with some buttons and labels together with a couple of other classes. My problem is that I have some methods in the classes in which I would like to update some labels in the main form. How is it possible to access the labels directly from the classes? thanks

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• google maps marker draggable doesn't work

  - by ArmenGrigoryan

  I try all methods but in my google map on the marker doesn't work events, I try enable events and write (clickable: true), but it did not help, in test server working good, but on phpfox marker not clickable, help me please correct it go to it http://iguansystems.com/phpfoxdev/index.php?do=/pages/24/quickstart/step2/ link login - [email protected], and pass- tryuser in center frontend right at "Primary Venue" have "Can't find venue? Add New" click on "Add New" and window with a map open

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• ASP.NET MVC validation in weakly typed views

  - by Eedoh

  Hello. I have a problem validating data on view that is not strongly typed. I'm updating data from 3 different models on that view, and I have validation methods that work on them, but I don't know how to display the validation message. Where should I put validation messages (on strongly typed views I put them in ModelState, I presume that does not make sense in this case), and how should I display them (I doubt that I will be able to use "validationmessagefor", maybe "validationmessage" somehow)?

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• ruby search drop down

  - by cesia

  I have a drop down list of Type in my Products model. I want to be able to search in the Products index.html.erb so a user selects a type from a drop down list, clicks search and all the products matching that type are returned. I can get normal search methods working where the user enters in their search in a text box but I cannot get it working when they just select from a dropdown. Can anyone help?

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• Why are static classes considered “classes” and “reference types”?

  - by Timwi

  I’ve been pondering about the C# and CIL type system today and I’ve started to wonder why static classes are considered classes. There are many ways in which they are not really classes: A “normal” class can contain non-static members, a static class can’t. In this respect, a class is more similar to a struct than it is to a static class, and yet structs have a separate name. You can have a reference to an instance of a “normal” class, but not a static class (despite it being considered a “reference type”). In this respect, a class is more similar to an interface than it is to a static class, and yet interfaces have a separate name. The name of a static class can never be used in any place where a type name would normally fit: you can’t declare a variable of this type, you can’t use it as a base type, and you can’t use it as a generic type parameter. In this respect, static classes are somewhat more like namespaces. A “normal” class can implement interfaces. Once again, that makes classes more similar to structs than to static classes. A “normal” class can inherit from another class. It is also bizarre that static classes are considered to derive from System.Object. Although this allows them to “inherit” the static methods Equals and ReferenceEquals, the purpose of that inheritance is questionable as you would call those methods on object anyway. C# even allows you to specify that useless inheritance explicitly on static classes, but not on interfaces or structs, where the implicit derivation from object and System.ValueType, respectively, actually has a purpose. Regarding the subset-of-features argument: Static classes have a subset of the features of classes, but they also have a subset of the features of structs. All of the things that make a class distinct from the other kinds of type, do not seem to apply to static classes. Regarding the typeof argument: Making a static class into a new and different kind of type does not preclude it from being used in typeof. Given the sheer oddity of static classes, and the scarcity of similarities between them and “normal” classes, shouldn’t they have been made into a separate kind of type instead of a special kind of class?

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• How do I use .htaccess to redirect to a URL containing HTTP_HOST?

  - by Jon Cram

  Problem I need to redirect some short convenience URLs to longer actual URLs. The site in question uses a set of subdomains to identify a set of development or live versions. I would like the URL to which certain requests are redirected to include the HTTP_HOST such that I don't have to create a custom .htaccess file for each host. Host-specific Example (snipped from .htaccess file) Redirect /terms http://support.dev01.example.com/articles/terms/ This example works fine for the development version running at dev01.example.com. If I use the same line in the main .htaccess file for the development version running under dev02.example.com I'd end up being redirected to the wrong place. Ideal rule (not sure of the correct syntax) Redirect /terms http://support.{HTTP_HOST}/articles/terms/ This rule does not work and merely serves as an example of what I'd like to achieve. I could then use the exact same rule under many different hosts and get the correct result. Answers? Can this be done with mod_alias or does it require the more complex mod_rewrite? How can this be achieved using mod_alias or mod_rewrite? I'd prefer a mod_alias solution if possible. Clarifications I'm not staying on the same server. I'd like: http://example.com/terms/ - http://support.example.com/articles/terms/ https://secure.example.com/terms/ - http://support.example.com/articles/terms/ http://dev.example.com/terms/ - http://support.dev.example.com/articles/terms/ https://secure.dev.example.com/terms/ - http://support.dev.example.com/articles/terms/ I'd like to be able to use the same rule in the .htaccess file on both example.com and dev.example.com. In this situation I'd need to be able to refer to the HTTP_HOST as a variable rather than specifying it literally in the URL to which requests are redirected. I'll investigate the HTTP_HOST parameter as suggested but was hoping for a working example.

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• Creating a "permanent" Cocoa object

  - by quixoto

  I have an object factory that hands out instances of certain "constant" objects. I'd like these objects to be protected against bad memory management by clients. This is how I've overridden the class's key methods. Am I missing anything (code or other considerations)? - (id)retain { return self; } - (NSUInteger)retainCount { return UINT_MAX; } - (void)release { // nothing. }

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• How to change the request IP in HttpWebRequest?

  - by holiveira

  I'm developing a website that will connect to a credit card processing gateway webservice. For security purposes this webservice accepts requests only from IP addresses that were previously informed to them. Since I'm developing locally, my IP changes almost every day. Is there a way for me to change the IP address of a HttpWebRequest so that I can test the Webservice calls locally? This webservice is accessed through a https address and the methods must be sent via POST.

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• Array performance question

  - by Konrad

  I am very familiar with STL vector (and other container) performance guarantees, however I can't seem to find anything concrete about plain arrays. Are pointer arithmetic and [] methods constant or linear time?

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• Best way to return result from business layer to presentation layer when using LINQ-to-SQL

  - by samsur

  I have a business layer that has DTOs that are used in the presentation layer. This application uses entity framework. Here is an example of a class called RoleDTO: public class RoleDTO { public Guid RoleId { get; set; } public string RoleName { get; set; } public string RoleDescription { get; set; } public int? OrganizationId { get; set; } } In the BLL I want to have a method that returns a list of DTO. I would like to know which is the better approach: returning IQueryable or list of DTOs. Although I feel that returning IQueryable is not a good idea because the connection needs to be open. Here are the 2 different methods using the different approaches: First approach public class RoleBLL { private servicedeskEntities sde; public RoleBLL() { sde = new servicedeskEntities(); } public IQueryable<RoleDTO> GetAllRoles() { IQueryable<RoleDTO> role = from r in sde.Roles select new RoleDTO() { RoleId = r.RoleID, RoleName = r.RoleName, RoleDescription = r.RoleDescription, OrganizationId = r.OrganizationId }; return role; } Note: in the above method the DataContext is a private attribute and set in the constructor, so that the connection stays opened. Second approach public static List<RoleDTO> GetAllRoles() { List<RoleDTO> roleDTO = new List<RoleDTO>(); using (servicedeskEntities sde = new servicedeskEntities()) { var roles = from pri in sde.Roles select new { pri.RoleID, pri.RoleName, pri.RoleDescription }; //Add the role entites to the DTO list and return. This is necessary as anonymous types can be returned acrosss methods foreach (var item in roles) { RoleDTO roleItem = new RoleDTO(); roleItem.RoleId = item.RoleID; roleItem.RoleDescription = item.RoleDescription; roleItem.RoleName = item.RoleName; roleDTO.Add(roleItem); } return roleDTO; } } Please let me know, if there is a better approach.

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• Choosing a W3C valid DOCTYPE and charset combination?

  - by George Carter

  I have a homepage with the following: <DOCTYPE html> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> My choice of the DOCTYPE "html" is based on a recommendation for html pages using jQuery. My choice of charset=utf=8 is based on a recommendation to make my pages readable on most browsers. But these choices may be wrong. When I run this page thru the W3C HTML validator, I get messages you see below. Any way I can eliminate the 2 errors? ! Using experimental feature: HTML5 Conformance Checker. The validator checked your document with an experimental feature: HTML5 Conformance Checker. This feature has been made available for your convenience, but be aware that it may be unreliable, or not perfectly up to date with the latest development of some cutting-edge technologies. If you find any issue with this feature, please report them. Thank you. Validation Output: 2 Errors 1. Error Line 18, Column 70: Changing character encoding utf-8 and reparsing. …ntent-Type" content="text/html; charset=utf-8"> 2. Error Line 18, Column 70: Changing encoding at this point would need non-streamable behavior. …ntent-Type" content="text/html; charset=utf-8">

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• recursive add binary numbers

  - by davit-datuashvili

  i need following algorithm let say we have 5 //101 and 7 //111 numbers are arbitrary i need to add these numbers using the recursive method and at the same time using bitwise methods such that result should be 101 + 111 110 0 or 12 can anybody help me?

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• Parse string as if it were a querystring in Ruby on Rails

  - by Koning WWWWWWWWWWWWWWWWWWWWWWW

  I have a string like this: "foo=bar&bar=foo&hello=hi" Does Ruby on Rails provide methods to parse this as if it is a querystring, so I get a hash like this: { :foo => "bar", :bar => "foo", :hello => "hi" } Or must I write it myself? EDIT Please note that the string above is not a real querystring from a URL, but rather a string stored in a cookie from Facebook Connect.

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• What are the testing method for a Linux filesystem?

  - by sasayins

  Hi, What are the testing methods for a Linux filesystem? Please provide example scenarios. I am wondering why my other questions were closed. I think it's a valid question.

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• Android: Text primary key with different name

  - by Echilon

  I have an existing Windows app for which I'm writing an Android port. The app uses a unique string as the primary key, but the SQLite methods in Android all seem to work with integers and a column names _id, whereas my ID column isn't called this. Is there a way to let Android know I have a key with a different column name?

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• Alternatives for storing web method postback data (besides Session)

  - by Sir Psycho

  What are the alternatives to storing data in the HttpContext.Current.Session collection are available, in order to keep track of items for ajax postbacks that are executed via web methods/services?

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• SqlBulkCopy with SqlHelper class

  - by Pandiya Chendur

  I've installed DataAccessApplicationBlock.msi and I got the Microsoft.ApplicationBlocks.Data.dll file into my bin folder. I found every other sqlhelper methods except ExecuteBulkCopy. How do I add ExecuteBulkCopy function to the SqlHelper class?

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• Design pattern for adding / removing elements

  - by de3

  Wikipedia's definition for Iterator pattern design: the Iterator pattern is a design pattern in which iterators are used to access the elements of an aggregate object sequentially without exposing its underlying implementation. Iterator interface in java provides the following methods hasNext() next() remove() Is there a pattern design, or a java interface for inserting / deleting elements, and getting length of the aggregate object, in addition to iterating them? I know remove() is an optional method that can be used once per call to next(), but I am implementing a circular FIFO array and need a method delete() independent of iterator's next().

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• Whats the difference in GET and POST encryption?

  - by Dju

  What is the difference when encrypting GET and POST data? Thx for answer Edit: i need to write it more specific. When https-SSL encrypts both of this methods, what is the difference in way browser does this. Which parts are encrypted and which are not? I somewhere read, that the destination url is not encrypted in POST, is that true? If it is true and same in GET, where are all the parameters?

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