步骤2:使用 Enum 中的 Key 来获取值 接下来,我们将学习如何根据 Enum 中的键来获取相应的值。我们可以直接通过 Enum 的名称和键来实现这一操作。以下是具体的代码示例: // 根据 Enum 中的 key 获取值constredValue=Color.Red;// 通过 Color.Red 获取对应的值// 打印获取到的值console.log(redValue);// ...
UK, and Australia).Then create a function ‘getKeyByStringValue’, inside this create a ‘for..in’ loop that iterates over the key i.e. Property names of the enum object, and checks whether the current property value matches the input value. ...
ts、typescript、enum、枚举、ts 获取枚举对应的类型 // 假设我一个枚举enumENUM_TYPE{ALL='all',SOME='some',LITTLE='little'}// 获取枚举的 valuetypeIValue=`${ENUM_TYPE}`// 'all' | 'some' | 'little'// 获取枚举的 keytypeIKey=keyoftypeofENUM_TYPE// 'ALL' | 'SOME' | 'LITTLE'...
log(statusKey); // 输出: "Success" 在这个例子中,getEnumKeyByValue 函数接受一个枚举值和对应的枚举对象,然后遍历枚举对象的所有键,找到与给定值相匹配的键并返回。 字符串枚举不支持反向映射: 需要注意的是,字符串枚举不支持反向映射。如果你尝试通过值来获取字符串枚举的键,将会失败,因为字符串枚举没有...
typescript枚举类型作为key typescript javascript 前端 字符串 typescript 枚举值作为对象的key typescript 枚举类型 enum关键字来定义。 enum Direction { Up = 1, Down, Left, Right} 常数或是计算得出的值不具有初始化函数并且之前的枚举成员是常数。 在这种情况下,当前枚举成员的值为上一个枚举成员的值加1...
console.log('keyof enum string type Snapchat is', mediaType); Output: So here we are able to get the key of enum members. Computed Enums: Enum members can also include keys with a computed numeric values. This value can either be a constant or computed. Let us check the below example...
}// 使用枚举enumResponse{No=0,Yes=1, }functionrespond(recipient:string, message: Response):void{// ...}respond("Princess Caroline",Response.Yes)// 使用计算量初始化的枚举值之后的枚举值不能没有初始化器enumE { A =getSomeValue(),
keys(NumericEnum)); // 👇️ ['Yes', 'No', 'Maybe'] console.log(Object.keys(StringEnum)); Notice that when a numeric enum is passed to the Object.keys method, we get an array containing the values and the names of the enum, whereas, for a string enum, we only get the ...
Map.groupByis similar, but produces aMapinstead of a plain object. This might be more desirable if you need the guarantees ofMaps, you’re dealing with APIs that expectMaps, or you need to use any kind of key for grouping – not just keys that can be used as property names in JavaScri...
TypeScript is smart enough to notice thatTestis not one of the keys in the enum and shows an error when a typo is made. I've also written an article onhow to convert an enum to a string. If you need to check if a value exists in an enum, click on thefollowing article. ...