Javascript 中没有枚举的概念,但是在Typescript中补充了枚举的类型。 这种类型可以有效的解决强耦合的魔法字符串的代码,如果代码中多处使用了魔法字符串,可以考虑使用枚举类型来降低代码的耦合。 补充:魔法字符串可以理解为多个地方使用了同一个字面量字符串进行直接赋值的行为。 数字枚举 // 定义一个数字枚举 enum T...
let statusList1 = StatusFlags.one | StatusFlags.two | StatusFlags.four;//7 (00111)statusList1^= StatusFlags.one;//toggle enum (有就移除)statusList1 === (StatusFlags.two |StatusFlags.four); statusList1^= StatusFlags.one;//toggle enum (有就移除)statusList1 === (StatusFlags.one | S...
notSure = false; notSure.toFixed(); //可以对any类型调用任意的方法。 1. 2. 3. 4. Void: 像是与any类型相反,它表示没有任何类型,当一个函数没有返回值时,其返回值类型是 void Function user(): void{ Console.log(“this is my warning message”); } 1. 2. 3. 4. 声明一个void类型的变量...
Java语言。将泛型列表强制转换为出厂对象列表将枚举传递给typescript中的泛型类有没有更简单的方法将int解析为泛型Flags枚举?将泛型类添加到采用泛型类型的列表使用泛型方法迭代Kotlin中的枚举值的接口比较两个列表的泛型方法如何在java中使用流将不带泛型的列表转换为带泛型的列表?将对象转换为泛型类型的正确方法如何...
IPick[] => ends.map(end => matchToPick(match, end));getMatchesPicksList()不直接接受EndType...
*/ function main(workbook: ExcelScript.Workbook) { // Get the currently selected range. let range = workbook.getSelectedRange(); // Get the type (`DataValidationType`) of data validation applied to the range. let validationType = range.getDataValidation().getType(); /* * Log...
If you want the values to start with a different value, in this case 1, specify that in the enum declaration. Make the following edits to have the enum start the values at 1. TypeScript העתק enum ContractStatus { Permanent = 1, Temp, Apprentice } Rerun the code by ...
TypeScript中是否有“any enum type”的类型? 枚举没有通用类型(枚举也只是对象),但您可以将其设置为一个泛型函数来获取以下任何值: enum WeekDay { Mon = "Mon", Tue = "Tue", Wed = "Wed", Thu = "Thu", Fri = "Fri",};function listEnum<T>(_enum: T): void { Object.values(_enum).for...
/** * This sample reads and logs the data validation type of the currently selected range. */functionmain(workbook: ExcelScript.Workbook){// Get the currently selected range.letrange = workbook.getSelectedRange();// Get the type (`DataValidationType`) of data validation applied to the range...
TypeScript has a discrete enum type that allows various compile-time checks and constraints to be enforced when using such types. It would be extremely useful to allow generic constraints to be limited to enum types - currently the only way to do this is via T extends string | number which...