let str1 = "Hello"; let str2 = "Hello"; let str3 = new String("Hello"); // 使用严格相等运算符 console.log(str1 === str2); // 输出: true console.log(str1 === str3); // 输出: false,因为str3是一个String对象,而不是原始字符串 // 使用抽象相等运算符 console.log(st...
const string1 = "hello";const string2 = String("hello");const string3 = new String("hello");const string4 = new String("hello");console.log(string1 == string2); // trueconsole.log(string1 == string3); // trueconsole.log(string1 == string4); // trueconsole.log(string2 == ...
let str1 = "Hello"; let str2 = "hello"; if (str1.toLowerCase() === str2.toLowerCase()) { console.log("Strings are equal, ignoring case."); } else { console.log("Strings are not equal."); } 方法二:使用正则表达式 你也可以使用正则表达式来创建一个不区分大小写的比较函数。 代码...
js constnullVar=null;nullVar.toString();// TypeError: nullVar is nullString(nullVar);// "null"constundefinedVar=undefined;undefinedVar.toString();// TypeError: undefinedVar is undefinedString(undefinedVar);// "undefined" Specification ECMAScript® 2026 Language Specification ...
than or equal to secondDate)console.log(firstDate <= secondDate)// true (firstDate is later than or equal to secondDate)console.log(firstDate == secondDate)// false (firstDate is not equal to secondDate)console.log(firstDate != secondDate)// true (firstDate is not to equal second...
Zod 是一个以 TypeScript 为首的模式声明和验证库 ,弥补了 TypeScript 无法在运行时进行校验的问题Zod 既可以用在服务端也可以运行在客户端,以保障 Web App...
0:001> dx @$myScript.comparisonWith64BitValues(9007199254740990, 9007199254740990) areEqual >> true areNotEqual >> false isEqualTo42 >> false isLess >> false 我们还将尝试将数字 42 作为第一个值,以验证比较操作符是否正常工作。 dbgcmd
6) 字符串运算符(String operators) 7) 条件(三元)运算符(Conditional operator [kənˈdɪʃənəl) 8) 逗号运算符(Comma operator [ˈkɑ:mə]) 9) 一元运算符(Unary operators [ˈju:nəri]) 10) 关系运算符(Relational operator [rɪ'leɪʃənl]) ...
Breaking a JavaScript String JavaScript will allow you to break a statement into two lines: Example 1 letx = "Hello World!"; Try it Yourself » But, breaking a statement in the middle of a string will not work: Example 2 letx ="Hello ...
constdate1=newDate("June 10, 2003");constdate2=newDate(date1);constequalOrNot=date1==date2?"相等":"不等";console.log(equalOrNot); 1. 2. 3. 4. 5. 这里将输出“不等”,这种特殊情况可以通过比较日期的时间戳来解决,如下所示: