enums

问题 I'm trying to call my API using postman, but the problem I'm facing is my API is using PUT method which takes enum object as a body.. How can I send enum in postman.. please help. export enum TestStatus { allCandidates, completedTest, expiredTest, blockedTest } this is my enum , I'm using Angular 2. 回答1: Providing you have a method that takes [FromBody]TestStatus status as a parameter. Click on Body tab and select raw , then JSON(application/json). Use this Json: { "TestStatus": "expiredTest"

问题 I have a TrafficLight C++ class and I have some doubts about using enum for color management, especially regarding the correct syntax to use. below I write simplified code pieces, since my intent is only to understand how it works: class TrafficLight { private: // ... enum class color{ GREEN, RED, YELLOW }; // ... public: TrafficLight(/* Want to pass the color here in the constructor */) { if(/* Color passed as argument is RED */) // do something... {} else // do something else... {} } };

问题 I have a TrafficLight C++ class and I have some doubts about using enum for color management, especially regarding the correct syntax to use. below I write simplified code pieces, since my intent is only to understand how it works: class TrafficLight { private: // ... enum class color{ GREEN, RED, YELLOW }; // ... public: TrafficLight(/* Want to pass the color here in the constructor */) { if(/* Color passed as argument is RED */) // do something... {} else // do something else... {} } };

问题 I have a table to save phone numbers for a contact. Within the table I have phone restrictions to tie to each phone number. The phone restrictions are stored as enums, but they can have multiple phone restrictions. When I try and create a migration I get the error The property 'PhoneNumber.Restrictions' could not be mapped, because it is of type 'ICollection' which is not a supported primitive type or a valid entity type. Either explicitly map this property, or ignore it using the '[NotMapped

问题 To encapsulate a list of states I am using enum module: from enum import Enum class MyEnum(Enum): state1='state1' state2 = 'state2' state = MyEnum.state1 MyEnum['state1'] == state # here it works 'state1' == state # here it does not throw but returns False (fail!) However, the issue is that I need to seamlessly use the values as strings in many contexts in my script, like: select_query1 = select(...).where(Process.status == str(MyEnum.state1)) # works but ugly select_query2 = select(...)

问题 To encapsulate a list of states I am using enum module: from enum import Enum class MyEnum(Enum): state1='state1' state2 = 'state2' state = MyEnum.state1 MyEnum['state1'] == state # here it works 'state1' == state # here it does not throw but returns False (fail!) However, the issue is that I need to seamlessly use the values as strings in many contexts in my script, like: select_query1 = select(...).where(Process.status == str(MyEnum.state1)) # works but ugly select_query2 = select(...)

问题 I defined an enum: enum TestEnum { test1, test2, } and I want make an enum with index: E buildEnum<E extends ?????????????????>(int index) { try { return E.values[index]; } catch(e) { return null; } } I don't know the type of enum. 回答1: enum A { a1, a2, a3} A.values[index] 回答2: You cannot make static accesses on a type parameter, so this cannot work. There is no way except reflection ( dart:mirrors ) to go from a value to a static member of its type. 回答3: I know what you mean, but it doesn't

问题 Is there a way to assign values to enums during runtime in objective c? I have several enums and want each of the enum to have certain value. The values could be read from a xml file. Is there a way to do this? 回答1: Unfortunatley, @Binyamin is correct, you cannot do this with an enum. For this reason, I usually do the following in my projects: // in .h typedef int MyEnum; struct { MyEnum value1; MyEnum value2; MyEnum value3; } MyEnumValues; // in .m __attribute__((constructor)) static void

问题 How can I cast a value from Enum1 to Enum 2 in Java? Here is an example of what I'm trying to do : public enum Enum1 { ONE, TWO, THREE; } public enum Enum2 { FOUR, FIVE, SIX; } So I want to do something like this: Enum2 en2 = (Enum2)ONE; Is it possible and how can I do that? Thanks in advance! 回答1: You cannot cast from one enum to another, however each enum has guaranteed order, and you can easily translate one enum to another (preserving order). For example: enum E1 { ONE, TWO, THREE, } enum

问题 How can I cast a value from Enum1 to Enum 2 in Java? Here is an example of what I'm trying to do : public enum Enum1 { ONE, TWO, THREE; } public enum Enum2 { FOUR, FIVE, SIX; } So I want to do something like this: Enum2 en2 = (Enum2)ONE; Is it possible and how can I do that? Thanks in advance! 回答1: You cannot cast from one enum to another, however each enum has guaranteed order, and you can easily translate one enum to another (preserving order). For example: enum E1 { ONE, TWO, THREE, } enum