instantiation

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problem when a Grails domain class extends from a EJB

When I has a grails domain class User that extends from a UserT class that is an EJB, in the User() instantiation throw an error. I understand not the cause of this problem, please h开发者_如何学Pytho[详细]

2023-02-03 14:26 分类：问答
Load all tab bar views when application first runs

I have开发者_开发问答 a tab bar controller with 4 separate views. When I navigate from the first view to the second view, it takes some time to load up the second view.[详细]

2023-02-03 12:12 分类：问答
Instantiating and starting a Scala Actor in a Map

I\'m experimenting with a map of actors, and would like to know how to instantiate them and start them in one fell swoop...[详细]

2023-02-03 06:58 分类：问答
Differences between variable instantiation outside constructor and in

I have to decide whether to put a variable within a constructor or outside, but I keep getting the feeling that I am missing information, I have looked at other posts on stack overflow, but all mentio[详细]

2023-01-31 12:05 分类：问答
Stop C++ Class Instantiation

Is there a way to stop a C++ class if there is an error in the instantiation? Like, return NULL maybe? Basically I have 开发者_Python百科a wrapper class for MySQL, and the constructor does the connect[详细]

2023-01-31 00:03 分类：问答
COM object can't be created when I upgrade client .Net Framework version

I have .net console application and com object I want to instantiate via: var t = Type.GetTypeFromProgID(\"myProgID\");[详细]

2023-01-30 12:22 分类：问答
How do I properly declare an instance of a subclass?

I am currently making a text based adventure in Java for the purposes of using it a test platform, to try out new things I learn from this Java book I\'m reading.[详细]

2023-01-30 04:32 分类：问答
Dynamically instantiating an inner class nested inside an abstract class

I understand that to instantiate an inner class (i.e. non-static), you need an instance of the enclosing class. This makes things a little more complicated if the enclosing class is abstract (don\'t a[详细]

2023-01-30 02:26 分类：问答
C#: How to use a derived class's const variable in base's constructor

Thanks in advance, My situation is that I have an abstract class called Vehicle that holds: private List<Tire> m_Tires;[详细]

2023-01-29 21:41 分类：问答
why i cant instantiate objects inside a switch-case block

my code has 3 classes n_hexa,n_octa,n_bin. The code is here switch(choice) { case 1: cin>>n; n_hexa nx(n);[详细]

2023-01-29 09:10 分类：问答