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• What is Control's DesignMode property and how to use it?

  - by sanjuro

  Hi, what is DesignMode property? When it is useful? I don't understand it from msdn definition http://msdn.microsoft.com/en-us/library/system.web.ui.control.designmode.aspx Some example? Thanks for answer.

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• What does "performant" software actually mean?

  - by Roddy

  I see it used a lot, but haven't seen a definition that makes complete sense. Wiktionary says "characterized by an adequate or excellent level of performance or efficiency", which isn't much help. Initially I though performant just meant "fast", but others seem to think it's also about stability, code quality, memory use/footprint, or some combination of all those. I think this is a "real" question - but if enough people reckon this is a subjective question, that's an answer in itself.

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• Routing optional parameters with dashes in MVC

  - by Géza

  I've made an routing definition like this: routes.MapRoute("ProductSearch", "Search-{MainGroup}-{SubGroup}-{ItemType}", new { controller = "Product", action = "Search", MainGroup = "", SubGroup = "", ItemWebType = ""}); It is not working if the parameters are empty. Actually it resolves the url, so Url.Action method resolves the path "Search-12--" but the link is not working, so the GET of the page is not working With slashes it is working the Url.Action method makes "Search/12" "Search/{MainGroup}/{SubGroup}/{ItemType}" is it somehow possible to correct it?

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• MSVC++ enum underlying type

  - by bobobobo

  MSDN has enum [tag] [: type] {enum-list} [declarator]; // for definition of enumerated type SO it looks like you can specify the type of an enum in MSVC++, but it doesn't seem to work for me: // want "underlying type" of this enum to be char. enum MyCharEnum : char { Val1 ='A', Val2 ='B', Val9 ='X' } ;

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• c++, when do you need/have to pass data as (*&)

  - by ra170

  I came across people passing data objects as: declaration: DataObject * data = 0; calling it as: SomeMethod( data ); definition of Somethod: void SomeMethod(SomeObject * & object) My obvious question is, when and why do you have to do this (& *)? Is it passing the pointer as reference?

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• Difference between macros and functions in C in relation to instruction memory and speed

  - by DAHANS

  To my understanding the difference between a macro and a function is, that a macro-call will be replaced by the instruction in the definition, and a function does the whole push, branch and pop -thing. Is this right, or have I understand something wrong? Additionally, if this is right, it would mean, that macros would take more space, but would be faster (because of the lack of the push,branch and pop instructions.), wouldn't it?

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• Closure vs Anonymous function (difference?)

  - by Maxim Gershkovich

  Hi, I have been unable to find a definition that clearly explains the differences between a closure and an anonymous function. Most references I have seen clearly specify that they are distinct "things" yet I can't seem to get my head around why. Could someone please simplify it for me? What are the specific differences between these two language features? Which one is more appropriate in what scenarios?

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• Pie chart of *nix shell use [closed]

  - by hayk.mart

  I've encountered a situation where it would be very helpful to know the breakdown of shell use by percentage. For example, I'm looking for something like bash: X%, sh: Y%, csh, tcsh, zsh, ksh, dash, etc.. Obviously, I know there are several complications - multiple shells, the definition of "use", uncertainty and so forth, but I would like to see an informed answer derived from actual data and based on some stated metric, even if the result could be horribly wrong. Bonus if there is historical data demonstrating a shift in preferences.

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• When is better to use a parser such as ANTLR vs. writing your own parsing code?

  - by ViralShah

  I need to parse a simple DSL which looks like this: funcA Type1 a (funcB Type1 b) ReturnType c As I have no experience with grammer parsing tools, I thought it would be quicker to write a basic parser myself (in Java). Would it be better, even for a simple DSL, for me to use something like ANTLR and construct a proper grammer definition?

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• Multiple declarations and definations

  - by Yogesh

  X.c >> ------------------------- int i; main () { fun (); } ------------------------- Y.c >> int i; fun () { } why does these two files compile with no error ? (using GCC) but if i use int i = 10; throws multiple definition error

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• Which Cassandra API provides the highest level of abstraction?

  - by knorv

  There are a lot of Cassandra API:s available and usually the programming language preference determines the choice of API. However, if we take the programming language component out of the equation, what Cassandra API provides the highest level of abstraction? Definition of "level of abstraction" in this context: An API providing a lot of extra goodies such as index handling, etc would be considered being at a higher abstraction layer than a bare bones "close to Thrift" API.

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• Spring singleton lifecycle

  - by EugeneP

  Reading this When a bean is a singleton, only one shared instance of the bean will be managed and all requests for beans with an id or ids matching that bean definition will result in that one specific bean instance being returned. Will be managed... What does that mean? If there's only one object, than any modification to this object will result in that every another attempt to get this bean will return a modified instance??

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• Struct inside a class

  - by Balakrishnan

  I have a class definition of the form class X { public: //class functions private: A_type *A; //other class variables }; and struct A_type is defined as struct A_type { string s1,s2,s3; }; Inside the constructor, I allocate appropriate memory for A and try A[0].s1="somestring"; It shows segmentation fault. Is this kind of declaration invalid, or am I missing something

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• Regarding address operator C/C++

  - by iSight

  Hi, What does address operator mean. say in the method below. what should be passed in the method as parameter value of integer or the address of an integer variable. void func1(int&)// method declaration void func1(int& inNumber)//method definition { //some code }

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• Model def in View State

  - by tinzawtun

  In my ruby on rails project in model, I have some of definition. class PlaySport < ActiveRecord::Base belongs_to :user belongs_to :sport def self.getLevel end def self.check_play_sport(cuser_id,sport_id) end def current_playing_sport end def all_played_sports end end I catch for this relation like this current_user.play_sports.current_playing_sport But I get the undefined method error "current_playing_sports" What is wrong

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• Does Visual Studio 2010 have tooling support for IronRuby?

  - by Alex

  I am interested in the following features: Code highlighting, Intellisense, Refactorings, Code navigation (Go to Definition etc.). If this functionality is missing from Visual Studio 2010 maybe Microsoft is planning to add these features in the future or there are community project to develop IronRuby tooling add-in?

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• Creating multiple objects of a view defined in the xml

  - by user362953

  I have to dynamically add a list of views (the views use RelativeLayout). Can I do this by specifying the view definition in xml and instantiate multiple objects off it? This gives the usual benefits of separating the view part from the code (for e.g., making it easy for the UI guys to alter things) or Is going the ArrayAdapter the suggested/only route?

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• How To Read C# Code From Java Background

  - by ChloeRadshaw

  I come from a Java background and have been using C# for the last year - So far the API docs I use are at MSDN (http://msdn.microsoft.com/en-us/library/ms132397.aspx). I tend to use the lightweight C# docs. What annoys me about that is that I don't see one page with details of the class, a list of members, a list of methods and properties like I would with a Java API definition. Is this possible?

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• What is the difference between (+) and (-) operator in obj c function

  - by niceramar

  Hi i am new to iphone and starts to learning Obj c. i have notice the function definition, for some function we are using (-) and for some function we are using (+) Example: + (id)requestWithURL:(NSURL *)theURL – initWithURL: what the difference between those two operator / symbol's usage? thanks!

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• Matching Strings: a biological perspective

  - by sun

  Write a function, called constrainedMatchPair which takes three arguments: a tuple representing starting points for the first substring, a tuple representing starting points for the second substring, and the length of the first substring. The function should return a tuple of all members (call it n) of the first tuple for which there is an element in the second tuple (call it k) such that n+m+1 = k, where m is the length of the first substring. Complete the definition def constrainedMatchPair(firstMatch,secondMatch,length):

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• Multiple declarations and definitions

  - by Yogesh

  Content of X.c: int i; main () { fun (); } Content of Y.c: int i; fun () { } Why does these two files compile with no error ? (using GCC) But if i use int i = 10; it prints a multiple definition error.

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• Need of serialization in Java

  - by JavaUser

  Hi , Can anyone tell me what is the need of Serialization in Java and an example scenario to explain the need . I dont need the definition .

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• regular expression - function body extracting

  - by Altariste

  Hi, In Python script,for every method definition in some C++ code of the form: return_value ClassName::MethodName(args) {MehodBody} ,I need to extract three parts: the class name, the method name and the method body for further processing. Finding and extracting the ClassName and MethodName is easy, but is there any simple way to extract the body of the method? With all possible '{' and '}' inside it? Or are regexes unsuitable for such task?

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• Problem in LINQ query formation

  - by Newbie

  I have written List<int> Uids = new List<int>(); Uids = (from returnResultSet in ds.ToList() from portfolioReturn in returnResultSet.Portfolios from baseRecord in portfolioReturn.ChildData select new int { id = baseRecord.Id }).ToList<int>(); Getting error: 'int' does not contain a definition for 'id' what is the problem that i created? Thanks

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• Events Internals: In .net how are Events represented internally?

  - by JeeZ

  Hi All, I have a basic doubt. Internally how are events represented as methods or as (fields)objects. If event is a field then how one can still contain events in the interface definition. Thanks JeeZ

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