enums

问题 Hi I'm using Hibernate 3.2 with a 1.6 JDK and Mysql 5.0 I'm trying to use the criteria api to put together a dynamic filter. However when I add a Restriction on a Set of Enums that is a property of my Criteria object I get a org.hibernate.exception.GenericJDBCException. my code is like this: public class FollowUp { ... public Set<AdminCategory> getAdminCategories() {...} public void setAdminCategories(Set<AdminCategory> _arg) { ... } } My hibernate mapping file has a set of Enum values as

问题 I have an enum declared in c#. Having Display Name/ EnumMember value annotation and Student Class. I'm using asp.net core 2.2+ version with Odata. [DataContract] Public Class Library { public int Id {get;set;} [DataMember(Name="Book_Name")] public BookNameEnum BookName {get; set;} } [DataContract] JsonConverter[typeof(StringEnumConverter)] public enum BookNameEnum { [Display(Name ="John Wick"), EnumMember(value="John Wick")] JohnWick = 1, [Display(Name ="John Snow"), EnumMember(value="John

问题 can't wrap my head around this and can't find any answers, hope someone could point me in the right direction. I have multiple enums. Some examples(i have a lot more and also more complex enums): enum Fish: String, CaseIterable, Displayable { case goldfish case blueTang = "blue_tang" case shark } enum Tree: String, CaseIterable, Displayable { case coconut case pine case englishOak = "english_oak" } I want to display those in a list with sections. I'm using swiftUI but that probably doesn't

问题 I'm trying to optimize out some function at compile time by using an enum class as a template parameter. Say for example enum class Color { RED, BLACK }; Now, I would like to define a method void myMethod<Color c> () { if( c == Color::RED ) { ... } if( c == Color::BLACK ) { ... } } And I would like the compiler to make 2 copies of myMethod and eliminate the dead code during the optimisation (it's for CUDA kernels so speed and register usage is important to me) However, seems like when I call

问题 The way structures allocate memory is that :- struct mys { int a , b, c ; }; As we can see in structs, when I declare a struct variable say, struct mys var1 , var1 takes the sum of all the basic datatypes inside it. (12 bytes here assuming the word length is 4 bytes) printf("%d",sizeof(var1)) ; output is 4 . In enum, we have, enum myvar{ id1 , id2 , id3 }; and whenever I declare an enum variable and print its size, it only prints the size of integer(4 bytes). And the id1 ,id2, id3 would get 0

问题 I'd like to make a method that implement valueOf on any Enum class passed in parameter (and also wrap some specialized error/missing-name code). So basically, I have several Enum such as: enum Enum1{ A, B, C } enum Enum2{ D, E, F } And I want a method that wrap around valueOf . I could not find a way to directly pass an Enum class in parameter on which I could call valueOf . Here is what I came up with: private static Enum getEnum(Class<Enum> E, String name){ for(Enum e: E.getEnumConstants())

问题 I have an entity type that contains an enum field. I use a JPA 2.1 AttributeConverter to map enum instances/values to a database column. The Enum values contain additional information I'd like to use in a QueryDSL query as if that information would be stored in the database. Example: A message entity that contains a messageType. The type is a enum value. The enum determines if the message is global or not. In the database, the enum is represented as an int-value. The information if global or

问题 We are interfacing with an externally controlled program with defined headers containing enumerations, and structures. We want to be able to interface with multiple versions of this program with as little duplication of code as possible. Each version has the same general enums and structures, but with slight modifications over time. In the ideal setup we could just conditionally include the different versions of the same header (i.e. if interfacing with version 1 #include "version1\progDefs.h

问题 We are interfacing with an externally controlled program with defined headers containing enumerations, and structures. We want to be able to interface with multiple versions of this program with as little duplication of code as possible. Each version has the same general enums and structures, but with slight modifications over time. In the ideal setup we could just conditionally include the different versions of the same header (i.e. if interfacing with version 1 #include "version1\progDefs.h

问题 We are interfacing with an externally controlled program with defined headers containing enumerations, and structures. We want to be able to interface with multiple versions of this program with as little duplication of code as possible. Each version has the same general enums and structures, but with slight modifications over time. In the ideal setup we could just conditionally include the different versions of the same header (i.e. if interfacing with version 1 #include "version1\progDefs.h