public static string GetName(Type enumType,Object value) public static string[] GetNames(Type enumType) 比如:Enum.GetName(typeof(Colors),3))与Enum.GetName(typeof(Colors), Colors.Blue))的值都是"Blue" Enum.GetNames(typeof(Colors))将返回枚举字符串数组。 1. 2. 3. 4. 5. 6. 7. 8. ...
可以按照以下方式实现转换函数: functionstringToEnumValue<T>(value:string,enumType:T):T[keyofT]|undefined{constenumValues=Object.values(enumType);for(constenumValueofenumValues){if(typeofenumValue==="string"&&enumValue.toLowerCase()===value.toLowerCase()){returnenumValue;}}returnundefined;} 1....
The given text presents introductions of named values as well as named types. However, certain declarations create both a named value and a named type. Similar to the above scenario, the type of the named value does not match the named type, and it is not equal to the type of an elemen...
enum gets key by string value in typescript by using for…in loop This is an example of an enum gets a key by string value in typescript by using for…in a loop. Using Object.Keys Here we will see how to enum gets a key by string value in typescript by using Object.key. The b...
String literals and union types In general, literal types are JavaScript primitive values. As of TypeScript ≥ version 1.8, we can create string literal types. Specifically, string literal types allow us to define a type that accepts only one specific string literal. On their own, they are us...
Note that in JavaScript the assignment operator returns the assigned value (in this case 0). Therefore the next thing executed by the JavaScript runtime is Tristate[0] = "False". This means that you can use the Tristate variable to convert a string version of the enum to a number or ...
Heterogeneous enums are enums that contain both string and numeric values. Example: Heterogeneous Enum Copy enum Status { Active = 'ACTIVE', Deactivate = 1, Pending }Reverse Mapping Enum in TypeScript supports reverse mapping. It means we can access the value of a member and also a member ...
The first enum variable a has a value = 3The second enum variable b has a value = 6The last enum variable c has a value = 7 The above example shows the access of each variable of an enum. String-Based Enums in TypeScript
Example in TypeScript import{EnumValues}from'enum-values'; //Suppose we have an numeric and a string valued enum enumNumericEnum{ VALUE1, VALUE2, VALUE3 } enumStringEnum{ VALUE4='V4', VALUE5='V5' } //names will be equal to: ['VALUE1', 'VALUE2', 'VALUE3'] ...
Pass either "GeeksforGeeks" or "A Computer Science portal." as testing string to the function A Computer Science portal. 一起使用 keyof 和 typeof 运算符 key和类型在 TypeScript 中,运算符可以一起用于将字符串转换为枚举。 用法: const variable_name: keyof typeof enum_name = value; ...