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• R: how to construct a mathematical expression from a character object?

  - by Rob Hyndman

  In R, I'm wanting to create a graph with x axis label expression(varname), where varname is a character object. For example: varname <- "beta[1]" hist(rnorm(20),xlab=expression(varname)) But that gives me a graph with xlab="varname" rather than xlab=expression(beta[1]). How to I convince expression() to evaluate the variable?

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• Is there any practical difference between an extension method on <T> or on Object?

  - by Scott Bilas

  Is there any practical difference between these two extension methods? class Extensions { public static void Foo<T>(this T obj) where T : class { ... } public static void Foo(this object obj) { ... } } I was poking around in Extension Overflow and I came across the first form, which I haven't used before. Curious what the difference is.

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• How to add a new method to a php object on the fly?

  - by MadBad

  How do I add a new method to an object "on the fly"? $me= new stdClass; $me->doSomething=function () { echo 'I\'ve done something'; }; $me->doSomething(); //Fatal error: Call to undefined method stdClass::doSomething()

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• How to get the object of UIcomponent used in JSF datatable?

  - by Hari

  In my application I am using a h:dataTable which contains a <h:selectOneMenu> and a <h:inputText>. I am binding the h:dataTable with a bean property. My question is, can we get the object of those components in a particular row with the help of h:dataTable's bound property in managed bean?

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• How do I get the index of the current Object in an NSEnumerator iteration?

  - by RexOnRoids

  Question: How do I get the index of the current Object in an NSEnumerator iteration? (I don't want to keep track of things using an integer counter or use a for loop due to speed reasons. I did it before I just cannot remember how I did it...)

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• Dynamic Object Initialization In JavaScript (just like PHP Reflection allows)?

  - by Gcoop

  Hi All, Using Reflection in PHP I can dynamically create a object like so $target = 'core_domain_Person'; $reflect = new ReflectionClass($target); $obj = $reflect->newInstance(); I would like to replicate this same concept in JavaScript is there a way to do this out of the box? Or is there a way to replicate what Reflection is doing?

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• Import a shared object and call its funtions in C++.

  - by Eduardo

  Is it possible to import a shared object (without linking the program with it) and call any function? Thanks.

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• Drupal: jQuery media module: how can I pass object ID ?

  - by Patrick

  hi, I'm using jQuery-media module to embed my flash player. How can I pass the current id using the FlashVars ? I can only write static string in jquery Media advanced settings, but I would like to pass the object id, maybe some token ? thanks

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• Can we overload the Point object in C# so it supports doubles?

  - by George Tyler

  I am drawing some graphs using the Point object and I want to set it so it supports doubles as its parameters. I am working on Visual C#, WindowsConsoleApplication Thank you.

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• Is it bad practice to not assign a new object to a variable?

  - by Jeff

  Is it bad javascript practice to not assign a newly created object to a variable if you're never going to access it? For example: for(var i=0;i<links.length;i++){ new objectName(links[i]); } And again, I won't be accessing it, so there's no need for a variable to reference it.

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• How do I persist a Java property of type Object using Hibernate?

  - by afielden

  I have a Java class with a property like this private Object myObj; When I try to save the class using Hibernate annotations, I get the rather confusing error message "property mapping has wrong number of columns". What is the correct approach to persisting a class containing a generic property such as this?

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• In a django model custom save() method, how should you identify a new object?

  - by MikeN

  I want to trigger a special action in the save() method of a Django model object when I'm saving a new record (not updating an existing record.) Is the check for (self.id != None) necessary and sufficient to guarantee the self record is new and not being updated? Any special cases this might overlook?

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• what is the basic role of Ienumerable object in .net?

  - by Shailesh Jaiswal

  I dont know anything about Ienumerable object.what is the role of Ienumarble interface in .net ? Please tell me whether it is in built? Is every class in .net automatically implements the Ienumarable interface ? why there is need to implement the ienumerable interface? what are the methods it contains & what roles they plays. Please explain in detail.

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• Accessing weakly typed facebook sdk result object properties in .NET 3.5 using the API?

  - by John K

  Consider the following in .NET 3.5 (using the Bin\Net35\Facebook*.dll assemblies): var app = new FacebookApp(); var result = app.Get("me"); // want to access result properties with no dynamic ... in the absence of the C# 4.0 dynamic keyword this provides only a generic object. How best should I access the properties of this result value? Are there helper or utility methods or stronger types in the facebook C# sdk, or should I use standard .NET reflection techniques?

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• Can anybody tell me exactly what the Object doesn't support this property or method means in IE for

  - by helle

  Hey guys, while surfing through the web and through stackoverflow.com i found many posts in forums, etc. where this message occures in IE but not in the other browsers. the thing is, the resolutions vary widely and it's not clear for me what's the best way to avoid this problem. So my question is, if anybody knows exactly, specificly what this message Object doesn't support this property or method means, causes, says ,... thanks for help. helle

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• How can I check if an object has a specific method?

  - by Ghommey

  I want to use a method of an object. Like $myObject->helloWorld(). However there are a couple of methods so I loop through an array of method names and call the method like this: my $methodName ="helloWorld"; $myObject->$methodNames; This works quite nice but some objects don't have all methods. How can I tell whether $myObject has a method called helloWorld or not?

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• Just seen a factory style object creating in JavaScript (without literals). What else do I need to k

  - by alex

  I have just seen this in code var thisYear = (new Date()).getFullYear(); See it live on JSbin. This is cool, as I've always done something like that in 2 lines, i.e. create the new object instance and assigned it to a variable, then called the method on it. Is this new method fine to use everywhere? Any gotchas?

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• Converting a CGRect of a object in a subview in UITableViewCell in UITable to CGRect with respect to

  - by user362956

  Hey, I want to converte a CGRect "aRect" of a object in a subview in UITableViewCell in UITable to CGRect with respect to self.view. The problem is that aRect is with respect to the subview in the table cell. But i want to make it so that it is with respect to self.view What i tried is this rect = [self.view convertRect:aRect.frame toView:cellView]; but it doesn't work. So how to convert it?

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• What will happen if I forgot to release the object in iPhone App?

  - by Tattat

  Will it auto release when the user quit the application? or it will stay in the machine until reboot? Also, have Apple provides any tools for developer to check whether they release the object or not.

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• Can you get the size of the Flash object in Actionscript?

  - by futuraprime

  I'm working with a Flash movie and I'm trying to get the size of the player itself (i.e. the height and width Flash has to work with from the object/embed tag). As far as I can tell, Flash doesn't make this available to ActionScript. I'm able to use this.root.loaderInfo.width and this.root.loaderInfo.height to get the "intended" size of the flash movie (what's specified on export), but if the dimensions are different on the page, this isn't helpful.

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• I got the address of a large managed object in WinDbg, what next?

  - by Mahen

  I created a high memory utilization dump and using !dumpheap -stat and !dumpheap -mt I got the address of two large string generic list of 30 MB each. I want to know more about these lists. What they contain or which piece of code is using them. Is there a way to find them out? 0:000 !do 2b370038 Name: System.Object[] MethodTable: 71e240bc EEClass: 71c0da54 Size: 33554448(0x2000010) bytes Array: Rank 1, Number of elements 8388608, Type CLASS Element Type: System.Collections.Generic.List`1[[System.String, mscorlib]] Fields: None

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• Is there a way to have SQL server validate object references in Stored Procs?

  - by Scott Weinstein

  The following code executes fine in SQL Server create proc IamBrokenAndDontKnowIt as select * from tablewhichdoesnotexist Of course if I try to run it, it fails with Invalid object name 'tablewhichdoesnotexist'. Is there any way to compile or verify that Stored Proc are valid?

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• How to find the byte offset of an object in C++?

  - by Phenom

  Let's say I create 5 objects. Would the byte offset of the first object be 0? How would I find out the byte offset of the other objects?

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• How to delete an object by using PK in nhibernate?

  - by jgauffin

  How do I delete an object without fetching it from the db first? In another ORM, I can do this: session.Delete<User>(1); // 1 = PK

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• Can we add any type of value in the list object ?

  - by Harikrishna

  Can we add in the list object any type of value ? Like if we List<string> str=new List<string>(); then only string value can be added to list.But I want to add any type of value in the list like string,decimal.

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