changeOption():void{ //execution when change options in select. } 参考: https://www.gurustop.net/blog/2016/05/24/how-to-use-typescript-enum-with-angular2/ https://stackoverflow.com/questions/35750059/select-based-on-enum-in-angular2 /*2017.10.30*/ https://stackoverflow.com/questions/46998065/onchange-not-working-for-angul...
在TypeScript中,枚举(Enum)是一种特殊的类型,它允许你定义一组命名的常量。枚举可以用于创建一组相关的值,并且这些值在整个代码库中都可以被引用。TypeScript的枚举有两种类型:数字枚举和字符串枚举。 相关优势 可读性:枚举提供了更具描述性的常量名称,使得代码更易于理解和维护。
Having a dedicated data type allows for data type specific operations. For instance, we cannot useselect_dtypesto choose only text columns if “object” data type is used. Select_dtypes(include=”object”) will return any column with object data type. On the other hand, if we use “string...
Angular2TypeScript：在html中使⽤enum显⽰相应内容：{{}}和 select 在ts中获取的数据为number类型，想在html中显⽰为对应的⽂字。需要在ts中指定枚举类型的引⽤变量：ts：@Component({ selector: 'pakcage-privilege',templateUrl: './package-privilege.component.html',styleUrls: ['./package-privilege...
并在每个文件里加入 'use strict' /* 额外的检查 */ "noUnusedLocals": true, // 有未使用的变量时,抛出错误 "noUnusedParameters": true, // 有未使用的参数时,抛出错误 "noImplicitReturns": true, // 并不是所有函数里的代码都有返回值时,抛出错误 "noFallthroughCasesInSwitch": true, // 报告 ...
枚举enum Any与Void 1. 基本类型合集 // 数字,二、八、十六进制都支持let decLiteral: number = 6;let hexLiteral: number = 0xf00d; // 字符串,单双引都行let name: string ="bob";let sentence: string = `Hello, my name is${ name }. ...
enumDays{Sun =7, Mon =1, Tue, Wed, Thu, Fri, Sat} 2.9 类 给类加上 TypeScript 的类型很简单,与接口类似: 深色代码主题 复制 classAnimal{name:stringconstructor(name:string) {this.name= name }sayHi(welcome:string):string{return`${welcome}My name is${this.name}`} ...
, allowing you to use it in your function. 代码语言:javascript 代码运行次数:0 运行 AI代码解释 function buildName(firstName: string, ...restOfName: string[]) { return firstName + " " + restOfName.join(" "); } let buildNameFun: (fname: string, ...rest: string[]) => string =...
letbody:HTMLElement=document.body;letallDiv:NodeList=document.querySelectorAll('div');document.addEventListener('click',function(e: MouseEvent) { // Do something }); 如果数组里的元素类型并不都是相同的怎么办呢? 这时any 类型就发挥作用啦啦 ...
Do you need to install type definitions for jQuery? Try `npm i --save-dev @types/jquery` and then add `jquery` to the types field in your tsconfig. 我们就需要将jQuery的声明语句放到单独的文件中,这就是声明文件: // src/jQuery.d.ts declare let $: (selector: string) => any; declare...