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• Should I worry about running out of HierarchyIDs?

  - by Bruno Martinez

  When you ask for a new HierarchyID between two others, the result gets progressively longer. For example, between 2/5.6 and 2/5.7 there's only 2/5.6.1 and other 4 component paths. The HierarchyID data type is limited to 800 some bytes, so you can't repeat this forever. Then again, integer types are also limited, but it isn't a problem in practice. Should I periodically defragment my table so that height doesn't grow unbounded?

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• copy unsigned array from managed to unmanaged

  - by gil

  Marshal.copy allows for signed data types only, but I have a giant array of uint16 to pass to IPP code. Any ideas ? unsafe for looping on it seems wrong ...

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• c++ std::ostringstream vs std::string::append

  - by NickSoft

  In all examples that use some kind of buffering I see they use stream instead of string. How is std::ostringstream and << operator different than using string.append. Which one is faster and which one uses less resourses (memory). One difference I know is that you can output different types into output stream (like integer) rather than the limited types that string::append accepts. Here is an example: std::ostringstream os; os << "Content-Type: " << contentType << ";charset=" << charset << "\r\n"; std::string header = os.str(); vs std::string header("Content-Type: "); header.append(contentType); header.append(";charset="); header.append(charset); header.append("\r\n"); Obviously using stream is shorter, but I think append returns reference to the string so it can be written like this: std::string header("Content-Type: "); header.append(contentType) .append(";charset=") .append(charset) .append("\r\n"); And with output stream you can do: std::string content; ... os << "Content-Length: " << content.length() << "\r\n"; But what about memory usage and speed? Especially when used in a big loop. Update: To be more clear the question is: Which one should I use and why? Is there situations when one is preferred or the other? For performance and memory ... well I think benchmark is the only way since every implementation could be different. Update 2: Well I don't get clear idea what should I use from the answers which means that any of them will do the job, plus vector. Cubbi did nice benchmark with the addition of Dietmar Kühl that the biggest difference is construction of those objects. If you are looking for an answer you should check that too. I'll wait a bit more for other answers (look previous update) and if I don't get one I think I'll accept Tolga's answer because his suggestion to use vector is already done before which means vector should be less resource hungry.

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• Cast IEnumerable<Inherited> To IEnumerable<Base>

  - by david2342

  I'm trying to cast an IEnumerable of an inherited type to IEnumerable of base class. Have tried following: var test = resultFromDb.Cast<BookedResource>(); return test.ToList(); But getting error: You cannot convert these types. Linq to Entities only supports conversion primitive EDM-types. The classes involved look like this: public partial class HistoryBookedResource : BookedResource { } public partial class HistoryBookedResource { public int ResourceId { get; set; } public string DateFrom { get; set; } public string TimeFrom { get; set; } public string TimeTo { get; set; } } public partial class BookedResource { public int ResourceId { get; set; } public string DateFrom { get; set; } public string TimeFrom { get; set; } public string TimeTo { get; set; } } [MetadataType(typeof(BookedResourceMetaData))] public partial class BookedResource { } public class BookedResourceMetaData { [Required(ErrorMessage = "Resource id is Required")] [Range(0, int.MaxValue, ErrorMessage = "Resource id is must be an number")] public object ResourceId { get; set; } [Required(ErrorMessage = "Date is Required")] public object DateFrom { get; set; } [Required(ErrorMessage = "Time From is Required")] public object TimeFrom { get; set; } [Required(ErrorMessage = "Time to is Required")] public object TimeTo { get; set; } } The problem I'm trying to solve is to get records from table HistoryBookedResource and have the result in an IEnumerable<BookedResource> using Entity Framework and LINQ. UPDATE: When using the following the cast seams to work but when trying to loop with a foreach the data is lost. resultFromDb.ToList() as IEnumerable<BookedResource>; UPDATE 2: Im using entity frameworks generated model, model (edmx) is created from database, edmx include classes that reprecent the database tables. In database i have a history table for old BookedResource and it can happen that the user want to look at these and to get the old data from the database entity framework uses classes with the same name as the tables to receive data from db. So i receive the data from table HistoryBookedResource in HistoryBookedResource class. Because entity framework generate the partial classes with the properties i dont know if i can make them virtual and override. Any suggestions will be greatly appreciated.

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• Routing to a different URLs based on post type

  - by DanCake

  What would be the best way to set up my routes so different types of posts have different URLs? For example, regular posts are /posts/slug while featured posts are /featured/slug Both link to the same controller and action /posts/view/slug. I experimented with different ways of doing this but with little success. Currently my link params look something like the following: array('controller' => 'posts', 'action' => 'view', 'featured' ,$post['Post']['slug'])

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• QuickGraph - How can I associate an Edge with a Class? (i.e. like you can with a Vertex)

  - by Greg

  Hi, Q1 - How can I associate an Edge with a Class? (i.e. like you can with a Vertex) In my case there are various types of edges I want to be able to model. So my real question I guess is how can I associate some level of data with Edges (e.g. edge type). The graph I was looking at using was: http://quickgraph.codeplex.com/wikipage?title=BidirectionalGraph&referringTitle=Documentation thanks

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• How is animation accomplished in these apps?

  - by android noob

  Most of the Android users use the GO SMS app, and the iPhone users use their normal messaging app (Android rocks). Now, whenever a user types a message and presses the send button, the message's edit text field sets a glossy green background, also the green colored background comes floating at the back of the edit text field. How do they do it? (I have been searching this for a while, but was unable to find an answer.)

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• Andorid Images for various devices

  - by Rajeev

  I have question regarding Android Layouts.I have read the documentation of Layouts .My question is that while developing lets say if the images are placed in the folders named drawable-hdpi drawable-ldpi drawable-mdpi drawable-xhdpi Does drawable-ldpi refers to the phones with smaller screen ,drawable-xhdpi for tabs and drawable-mdpi medium sized screen phones. If not i have a image i need to be able to put into all types of devices namingly phone,tab How can i do it.

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• get dictionary key by value

  - by loviji

  how to get a Dictionary key by value in C#? Dictionary<string, string> types = new Dictionary<string, string>() { {"1", "one"}, {"2", "two"}, {"3", "three"} }; I want simething like this: getByValueKey(string value); getByValueKey("one") must be return "1". What is the best way do this? may be HashTable, SortedLists?

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• Can i use a generic implicit or explicit operator? C#

  - by acidzombie24

  How do i change the following statement so it accepts any type instead of long? Now here is the catch, if there is no constructor i dont want it compiling. So if theres a constructor for string, long and double but no bool how do i have this one line work for all of these support types? ATM i just copied pasted it but i wouldnt like doing that if i had 20types (as trivial as the task may be) public static explicit operator MyClass(long v) { return new MyClass(v); }

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• Determining the best audio quality.

  - by The Rook

  How can you determine the best audio quality in a list of audio files, with out looking at the audio file's header. What if all of the files came from differnt encoding types and they where all transcoded to the same format and bit rate.

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• how to find if groovy args contains a particular string

  - by groovynoob

  println args println args.size() println args.each{arg-> println arg} println args.class if (args.contains("Hello")) println "Found Hello" when ran give following error: [hello, somethingelse] 2 hello somethingelse [hello, somethingelse] class [Ljava.lang.String; Caught: groovy.lang.MissingMethodException: No signature of method: [Ljava.lang. String;.contains() is applicable for argument types: (java.lang.String) values: [Hello] why can I not do contains?

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• Get metadata out of a webHttpBinding endpoint

  - by decyclone

  Hi, With a reference to my previous question, I would like to know how would I extract information of a WCF service from a client application to know what methods/types are exposed if the service exposes only one endpoint that uses webHttpBinding? Just to summarize, in my previous question, I came to know that an endpoint using webHttpBinding does not get exposed in the generated WSDL because it would be a JSON endpoint and is just not compatible.

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• Ask Field formatting

  - by developer

  I am using ASK fields in a word document, wherein the user are prompted with questions and the document is then built with the answers that the user type in. My question is that word does not allow more that 200 characters in the prompt box wherein the user types in the questions. Is there a way I can increase its maxlength. Also I want to change the font color of the question asked in the prompt box. Is it possible?

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• Proper exceptions to use for nulls

  - by user200295

  In the following example we have two different exceptions we want to communicate. //constructor public Main(string arg){ if(arg==null) throw new ArgumentNullException("arg"); Thing foo=GetFoo(arg); if(foo==null) throw new NullReferenceException("foo is null"); } Is this the proper approach for both exception types?

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• How do I edit .htaccess to allow both rails and wordpress requests?

  - by jakefuentes

  I want to run an instance of wordpress within my rails app. I currently have wordpress files housed in public/wordpress, but I need to configure my .htaccess file to allow both types of requests. How do I do that? currently, .htaccess is: General Apache options AddHandler fcgid-script .fcgi RewriteEngine On RewriteRule ^$ index.html [QSA] RewriteRule ^([^.]+)/!$ $1.html [QSA] RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ dispatch.fcgi [QSA,L] ErrorDocument 500 "Application error Application failed to start properly"

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• patter matching for custom read function

  - by altair211

  Hi, I am writing a custom read function for one of the data types in my module. For eg, when I do read "(1 + 1)" :: Data, I want it to return Plus 1 1. My data declaration is data Data = Plus Int Int. Thanks

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• understanding a Build c++

  - by numerical25

  I think I know what a build is. But I am not sure. My definition of a build is another word for saying compiled application. Can someone please tell me what exactly a build is. And why do people ask for 2 types of builds. Such as Debug Build, Profile Build and a Release Build. What are the differences.

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• Interpreter typing in C

  - by typus

  I'm developing an interpreter and I have some questions to it. I recently saw a small C interpreter that used a very simple struct like the below for all its objects/values in the language: struct Object { ubyte type; ubyte value; }; This struct can hold strings, integers, bools and lists (I think) used in the language the interpreter is working with. How can you get this Object struct to hold all these types?

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• Another void C# question

  - by Jim Jones

  Have a type in the header files I'm working with called VTVOID it is the type of a struct element and a number of parameters. In the header file defining types is the line #define VTVOID void I read in another discussion the void maps to System.Void however when I plug that into the C# code I get the error "System.Void cannot be used in C# -- use typeof(void) to get the void object." So what type do I plug in? Jim

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• Problem migrating membershipProvider functionality from mvc1 to mvc2

  - by Jericho

  I am migrating a web app in mvc1 to mvc2. When it came down to migrating my MembershipProvider authentication I keep getting errors that MembershipProvider and MembershipCreateStatus type cannot be found. I do have the reference to System.Web which to my understanding includes the Security reference, but when I examine the the object, those types do not appear. I am just getting familiar with mvc2, if anyone has any input on this it would be extremely appreciated.

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• What's the solution for this gtk warning?

  - by Runner

  GtkWidget *textview; ... textview = gtk_text_view_new (); ... buffer = gtk_text_view_get_buffer (textview); At the last line I pasted I got this warning: warning C4133: 'function' : incompatible types - from 'GtkWidget *' to 'GtkTextView *' How can I fix that?

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• In django, how can I include some default records in my models.py?

  - by kdt

  If I have a models.py like class WidgetType(models.Model): name = models.CharField(max_length=200) class Widget(models.Model): typeid = models.ForeignKey(WidgetType) data = models.CharField(max_length=200) How can I build in a set of built in constant values for WidgetType when I know I'm only going to have a certain few types of widget? Clearly I could fire up my admin interface and add them by hand, but I'd like to simplify configuration by having it built into the python.

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• search a jquery autocomplete plugin

  - by user285336

  User enters tag in the textbox. The textbox is a live search as the user types it brings up suggester results based on the tags already in the system, simiral to stackoverflow tag input :) Tags are separated by commas, so when a user selects a result from the livwe search, it automatically populates the text and a trailing comma does anybody know such plugin?

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• Calendar using Javascript/ PHP/ mySQL

  - by Gushiken

  for a current webapp i need a "outlook-like" calendar... Here are some requirements for the calendar: week-view for the appointments different appointment types direct display of the length and time of the date (like in googleCalendar) multiple appointments for the same time only using javascript, php and any DB We need the calendar for the Zend Framework, so if the Calendar doesn't already support the ZF, the source needs to be editable! do you know any calendar which fits my needs? or do you have any tipps for developing one by myself?

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