"orange is present in array" Use thesome()Method to Check if a String Is Present in a TypeScript Array Thesome()method checks if at least one element in the array passes the predicated function passed to it. The following code segment demonstrates how it can search for a string in an ...
let someArray = [1, "string",false];for(let entry of someArray) { console.log(entry);//1, "string", false} 二、for..in 方法 这个方法要注意和for..of的区别,for..in遍历的值是数组的索引 let list = [4, 5, 6];//for infor(let iinlist) { console.log(i);//"0", "1", "2...
text_1_1.done;text_1_1=text_1.next()){varchar=text_1_1.value;console.log(char);}}catch(e_1_1){e_1={error:e_1_1};}finally{try{if(text_1_1&&!text_1_1.done&&(_a=text_1.return))_a.call(text_1);}finally{if(e_1)throwe_1.error;}}vare_1,_a;...
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2.3 String 类型 2.4 Symbol 类型 2.5 Array 类型 2.6 Enum 类型 使用枚举我们可以定义一些带名字的常量。 使用枚举可以清晰地表达意图或创建一组有区别的用例。 TypeScript 支持数字的和基于字符串的枚举。 1.数字枚举 默认情况下,NORTH 的初始值为 0,其余的成员会从 1 开始自动增长。换句话说,Direction.SOUTH ...
maybeString != "string") || !sanitizeBar(checker.bar) ) { return false; } return true; } function sanitizeBar(checker: any) { if (!sanitizenumberArray(checker.numbers)) { return false; } return true; } function sanitizenumberArray(checker: any) { if (!Array.isArray(checker)) { ...
if ("startDate" in emp) { console.log("Start Date: " + emp.startDate); } } 4.2 typeof 关键字 function padLeft(value: string, padding: string | number) { if (typeof padding === "number") { return Array(padding + 1).join(" ") + value; ...
["DOM", "ES2015", "ScriptHost","ES2019.Array"], // TS需要引用的库,即声明文件,es5 默认引用dom、es5、scripthost,如需要使用es的高级版本特性,通常都需要配置,如es8的数组新特性需要引入"ES2019.Array", "allowJS": true, // 允许编译器编译JS,JSX文件 "checkJs": true, // 允许在JS文件中报错...
text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner { let pos: number; let end: number; let startPos: number; let tokenPos: number; let token: SyntaxKind; let tokenValue: string; setText(text, start, length); ...
Zero if they are equivalent Check outTypescript split string multiple separators Compare Strings for Sorting in TypeScript Now, let me show you some methods to compare strings for sorting in TypeScript. All method will have examples. Using Array.sort() with String Comparison ...