Can enums be extended C#?
Since it’s not a class, it cannot be extended and its defined values are limited to a small set of primitive types ( byte , sbyte , short , ushort , int , uint , long , ulong ). For instance, sometimes it is very convenient to get the list of enum values and display it in a combobox.
Are enums good practice?
All in all, enums are efficient, easy to use, and a great way to make your code simpler to read and maintain. Go get rid of those “magic numbers” and use a little magic called enums instead.
Are enums bad practice?
It provides strong type safety. They have some disadvantages at times, but this is really typically related to situations where every possible option is not known in advance. If you have a fixed set of options, such as your example, then strong typed enums are a good thing, and should not be avoided.
Should you store enums in database?
By keeping the enum in your database, and adding a foreign key on the table that contains an enum value you ensure that no code ever enters incorrect values for that column. This helps your data integrity and is the most obvious reason IMO you should have tables for enums.
Should I use enum or class?
An enum can, just like a class , have attributes and methods. The only difference is that enum constants are public , static and final (unchangeable – cannot be overridden). An enum cannot be used to create objects, and it cannot extend other classes (but it can implement interfaces).
Should enums be static C#?
Enums are types, not variables. Therefore they are ‘static’ per definition, you dont need the keyword.
Can you have a list of enums?
Yes. If you do not care about the order, use EnumSet , an implementation of Set . enum Animal{ DOG , CAT , BIRD , BAT ; } Set flyingAnimals = EnumSet. If you care about order, use a List implementation such as ArrayList .
Should you use enums in Python?
Use it anywhere you have a canonical source of enumerated data in your code where you want explicitly specified to use the canonical name, instead of arbitrary data. For example, if in your code you want users to state that it’s not “Green” , “green” , 2, or “Greene” , but Color. green – use the enum.
Why you should not use enums?
Working with ENUM types CREATE TABLE person( name VARCHAR(255), gender ENUM(‘Male’, ‘Female’) ); CUBRID understands the ENUM type as an ordered set of constants which, in the above example, is a set of {NULL: NULL, 1: ‘Male’, 2: ‘Female”} .
Should I use enums?
Enums are lists of constants. When you need a predefined list of values which do represent some kind of numeric or textual data, you should use an enum. You should always use enums when a variable (especially a method parameter) can only take one out of a small set of possible values.
Should enums be string or int?
2 Answers. The implementation is easy in both cases, and performance differences should be minor. Therefore, go for the meaning : the Strings are more meaningful than numbers, so use the String. +1 I have worked with millions of records.
Which class does all the enums extend?
java.lang.Enum
Explanation: All enums implicitly extend java. lang. Enum. Since Java does not support multiple inheritance, an enum cannot extend anything else.
Is it possible to extend enum in C++?
Actually you can extend enums in a round about way. The C++ standard defines the valid enum values to be all the valid values of the underlying type so the following is valid C++ (11+). Its not Undefined Behaviour, but it is very nasty – you have been warned.
What is flag enum in C++?
Flag enums are designed to support bitwise operations on the enum values. A common example of the flags enum is a list of options. ✓ DO use an enum to strongly type parameters, properties, and return values that represent sets of values. ✓ DO favor using an enum instead of static constants.
What is the most common default value for an enum?
If such a value is not appropriate for this particular enum, the most common default value for the enum should be assigned the underlying value of zero. ✔️ CONSIDER using Int32 (the default in most programming languages) as the underlying type of an enum unless any of the following is true:
What is the difference between Int32 and Int32 enum?
The enum is a flags enum and you have more than 32 flags, or expect to have more in the future. The underlying type needs to be different than Int32 for easier interoperability with unmanaged code expecting different-size enums. A smaller underlying type would result in substantial savings in space.