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...
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(str...
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 == ...
可以使用String作为toString()更可靠的代替方法,因为它在用于null和undefined时仍然有效。例如: js constnullVar=null;nullVar.toString();// TypeError: nullVar is nullString(nullVar);// "null"constundefinedVar=undefined;undefinedVar.toString();// TypeError: undefinedVar is undefinedString(undefinedVar);/...
earlier 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 secondDate...
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...
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]) ...
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...
/** Not localized full time format string @example "11:44 PM" */ fullTime12h: TLibFormatToken; /** Not localized full time format string @example "23:44" */ fullTime24h: TLibFormatToken; /** Date & time format string with localized time @example "Jan 1, 2018 11:44 PM" */ ...
0:001> dx @$myScript.comparisonWith64BitValues(42, 9007199254740990) areEqual >> false areNotEqual >> true isEqualTo42 >> true isLess >> true 然后,我们将计算 (2^53) -1 =9007199254740991。 此值将返回一个错误,指示转换过程将损失精度,因此这是 JavaScript 代码中比较运算符可以使用的最大值。