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Search found 4493 results on 180 pages for 'operator keyword'.

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• list of pointers in c++

  - by pavlos

  What i want to do is for (list<cPacket *>::iterator i = cache.begin(); i != cache.end(); i++){ if( strcmp(i->getName(),id) == 0 ){ return true; } } where getName is function of the class cPacket, But it does not work, i tries also i.operator->()->getName(), and again nothing. Can anybody help me?

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• adding a css class with Html.TextBox

  - by Blankman

  Trying to add a 'class' html attribute, but I think the keyword 'class' is causing issues. <%: Html.TextBox("name", "value", new {class: " required "})%> Is there a workaround?

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• Why do I need an intermediate conversion to go from struct to decimal, but not struct to int?

  - by Jesse McGrew

  I have a struct like this, with an explicit conversion to float: struct TwFix32 { public static explicit operator float(TwFix32 x) { ... } } I can convert a TwFix32 to int with a single explicit cast: (int)fix32 But to convert it to decimal, I have to use two casts: (decimal)(float)fix32 There is no implicit conversion from float to either int or decimal. Why does the compiler let me omit the intermediate cast to float when I'm going to int, but not when I'm going to decimal?

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• In C#, how do I check if a type is a subtype OR the type of an object?

  - by Daniel T.

  To check if a type is a subclass of another type in C#, it's easy: typeof (SubClass).IsSubclassOf(BaseClass); // returns true However, this will fail: typeof (BaseClass).IsSubclassOf(BaseClass); // returns false Is there any way to check whether a type is either a subclass OR of the base class itself, without using an OR operator or using an extension method?

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• What does =*> mean with regards to context free grammars?

  - by incrediman

  I've been reading a couple books/online references about compiler theory, and keep seeing that particular operator coming up every once in a while (as seen here), specifically when the current topic is context free grammars. What does it mean? As well, how does it differ from =>? Explanations with examples distinguishing => from =*> would be most helpful.

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• How to Solve this Error "Cannot convert lambda expression to type 'string' because it is not a deleg

  - by peace

  . I get this error: "Cannot convert lambda expression to type 'string' because it is not a delegate type" - keyword select become underlined in blue Can you please advice. Employee emp = new Employee(); comHandledBySQt.DataSource = from x in emp.GetDataFromTable("1") select new { x.Id, Name = x.FirstName + " " + x.LastName }; comHandledBySQt.DisplayMember = "Name"; comHandledBySQt.ValueMember = "Id"; Above code should displays drop list of employees first name and last name in a combo box

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• Force VS to use System.[Type] in Code Completion

  - by James

  Is it possible to have Visual Studio code completion use the System.[Type] instead of the keyword. Example: Autocomplete of List<String> myList = completes as: List<String> myList = new List<string>(); whereas, I want: List<String> myList = new List<String>(): This isn't the only example, but hopefully shows what I'm looking for.

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• C# any way of accessing the class name of a static class via code?

  - by Nick Allen - Tungle139

  Within a static class you cannot use the keyword "this" so I can't call this.GetType().GetFullName if I have public static class My.Library.Class { public static string GetName() { } } Is there anything I can call from within GetName that will return My.Library.Class

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• Can I use "map" as a substitute for "for each"/"for in"?

  - by John Mee

  For a little while now javascript has the "map" function to loop over arrays. It appears possible to use it as a 'foreach' operator for example: var arr = ['a','b','c'] var doubles = arr.map(function(val){ return val + val }) Is this better or worse than saying for(var i in arr){ ... 50/50: saves having to use the index but adds a callback; it doesn't seem very common so I hesitate to use it but still want to.

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• Why am I unable to create a trigger using my SqlCommand?

  - by acidzombie24

  The line cmd.ExecuteNonQuery(); cmd.CommandText CREATE TRIGGER subscription_trig_0 ON subscription AFTER INSERT AS UPDATE user_data SET msg_count=msg_count+1 FROM user_data JOIN INSERTED ON user_data.id = INSERTED.recipient; The exception: Incorrect syntax near the keyword 'TRIGGER'. Then using VS 2010, connected to the very same file (a mdf file) I run the query above and I get a success message. WTF!

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• C++: ptr->hello(); /* VERSUS */ (*ptr).hello();

  - by Joey

  i was learning about c++ pointers... so the "-" operator seemed strange to me... instead of ptr-hello(); one could write (*ptr).hello(); because it also seems to work, so i thought the former is just a more convenient way is that the case or is there any difference?

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• [UNIX] Is it safe to pipe the output of several parallel processes to one file using >> ?

  - by conradlee

  I'm scraping data from the web, and I have several processes of my scraper running in parallel. I want the output of each of these processes to end up in the same file. As long as lines of text remain intact, I the order of the lines does not matter. In UNIX, can I just pipe the output of each process to the same file using the operator?

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• C++ language some live examples for mutable...

  - by user292926

  Respected sir , i need some help for Mutable keyword it is used in a const. funcation and pls any body explain for the live example about the mutable and constant function and also diff. for the volatile member and function pls help me in Advance Thank you,

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• c#: adding two strings

  - by every_answer_gets_a_point

  i am doing: html = new WebClient().DownloadString("http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=" + biocompany); and i am getting the error: Error 1 Operator '&' cannot be applied to operands of type 'string' and 'string' but i am not even using the & ! please help!

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• Is it safe to synchronize java.awt.Container.paint(Graphics g)?

  - by Alison G

  I'm using some 3rd party AWT components in a desktop application. The component's layout is changed within the paint() method, and this causes some very strange behaviour. This appears to be fixed by adding the synchronized keyword to the paint() method, but is this a safe thing to do?

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• Error Message 'class::function' : illegal call of non-static member function

  - by shak

  i was trying to call a static function of class using scope resolution operator, the way to access static function but still generating error. what are the possibilities.

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• Php string handling tricks

  - by Dam

  Hi my question Need to get the 10 word before and 10 words after for the given text . i mean need to start the 10 words before the keyword and end with 10 word after the key word. Given text : "Twenty-three" The main trick : content having some html tags etc .. tags need to keep that tag with this content only . need to display the words from 10before - 10after content is bellow : removed Thank you

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• C++ pointer to objects

  - by Tony

  In C++ do you always have initialize a pointer to an object with the new keyword? Or can you just have this too: MyClass *myclass; myclass->DoSomething(); I thought this was a pointer allocated on the stack instead of the heap, but since objects are normally heap allocated, I think my theory is probably faulty?? Please advice.

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• Cannot save property group to product in django-lfs

  - by vernomcrp

  I already create properties and add them to property group.Then I assign to my new product.But django show me TypeError at /manage/update-product-properties/1 save() got an unexpected keyword argument 'using'

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• c#: xdocument and reading xsi:nil="true" gives "String was not recognized as a valid DateTime"

  - by DingoCC

  Happily reading xml with var q2 = from c in xmlDoc.Descendants("Ticket") select new { Responded_Date = (DateTime)c.Element("Responded_Date") } However when the tag is <Responded_Date xsi:nil="true" /> I get "String was not recognized as a valid DateTime". I don't wish to use the null coalescing operator but simply to take the null and insert into datatable

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• What is the best way to move site to new domain without loosing google page rank

  - by T1000

  Hello I just bought new domain for my web page. Is it good to use php redirection to the new domain and what are the exact headers that I must send to google bot to just renew the address and keep the page rank without loosing position in search results for the specific keyword ? Regards

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• Can I have a CASE statement within a WHILE loop?

  - by John

  This is what I'm doing: while (@counter < 3 and @newBalance >0) begin CASE when @counter = 1 then ( @monFee1 = @monthlyFee, @newBalance = @newBalance-@fee) when @counter = 2 then ( @monFee2 = @monthlyFee, @newBalance = @newBalance-@fee) END @counter = @counter +1 end I get this error: Incorrect syntax near the keyword 'CASE'. No idea why. Please help!

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• How can an object not be compared to null?

  - by ProfK

  I have an 'optional' parameter on a method that is a KeyValuePair. I wanted an overload that passes null to the core method for this parameter, but in the core method, when I want to check if the KeyValuePair is null, I get the following error: Operator '!=' cannot be applied to operands of type System.Collections.Generic.KeyValuePair<string,object>' and '<null>. How can I not be allowed to check if an object is null?

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• Generics : List<? extends Animal> is same as List<Animal>?

  - by peakit

  Hi, I am just trying to understand the extends keyword in Java Generics. List<? extends Animal> means we can stuff any object in the List which IS A Animal then won't the following also mean the same thing: List<Animal> Can someone help me know the difference between the above two? To me extends just sound redundant here. Thanks!

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• How is it possible to legally write ::: in C++ and ??? in C#?

  - by daveny

  These questions are a kind of game, and I did not find the solution for them. It is possible to write ::: in C++ without using quotes or anything like this and the compiler will accept it (macros are prohibited too). And the same is true for C# too, but in C#, you have to write ???. I think C++ will use the :: scope operator and C# will use ? : , but I do not know the answers to them. Any idea?

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