varre=/apples/gi;varstr="Apples are round, and apples are juicy.";if(str.search(re)==-1){console.log("Does not contain Apples");}else{console.log("Contains Apples");} 10.slice() 提取字符串的片断,并在新的字符串中返回被提取的部分。
我们也可以随意地扩展 IntrinsicElements,举个例子,我们开发了一些Web Component组件: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 declare global{namespaceJSX{exportinterfaceIntrinsicElements{'wkc-header':{// props 定义title?:string;};}}} 💡 上面例子中 JSX 是放在global空间下的,某些极端的场景下,...
To check if a string contains a substring in TypeScript, use the includes() method: const text = "TypeScript is awesome"; console.log(text.includes("awesome")); // true console.log(text.includes("Java")); // false This method is case-sensitive. For case-insensitive checks: console.lo...
public class StringCtreate { public static void main(String[] args) { String str1= "aa"; //直接赋值法创建对象 String str2 = new String("aa"); //new关键字赋值法创建 String str3="aa"; String str4 = new String("aa"); if(str2==str4) { System.out.print("equal"); } else { ...
function buildName(firstName: string, lastName?: string) { if (lastName) return firstName + " " + lastName; else return firstName; } In TypeScript, we can also set a value that a parameter will be assigned if the user does not provide one, or if the user passes undefined in its...
: boolean;/*** The warning message*/message: string;} 1.2.6@eventProperty 当应用于类或接口属性时,这表示该属性 返回事件处理程序可以附加到的事件对象。事件处理 API 是实现定义的,但通常属性返回类型是一个类 与成员如addHandler()和removeHandler()。文档工具可以 在“Events”标题下显示此类属性,而不是...
(); // 根据是否有"DATA"来判断模板字符串是什么模式 boolean isArray = jsonPath.contains("DATA"); if (isArray) {// 该模式使用了正则表达式 // 直接是一个数组,包含多个json对象,即包含多个Map集合 List<Map<String, String>> mapList = (List<Map<String, String>>) readPath(jsonPath, "$.DATA...
functiongetUrls(url: string | URL, names: string[]){if(typeofurl==="string") {url=newURL(url); }returnnames.map(name => {url.searchParams.set("name", name)// ~~~// error!// Property 'searchParams' does not exist on type 'string | URL'.returnurl.toString(); }); } Here,...
*/ export const handler = async (event: OrderEvent): Promise<string> => { try { // Access environment variables const bucketName = process.env.RECEIPT_BUCKET; if (!bucketName) { throw new Error('RECEIPT_BUCKET environment variable is not set'); } // Create the receipt content and key...
number); } if ( typeof checker.boolean == "string" && (checker.boolean == "true" || checker.boolean == "false") ) { checker.boolean = checker.boolean == "true"; } if ( typeof checker.number != "number" || typeof checker.boolean != "boolean" || (checker.maybeString != ...