JavaScript中不能作为变量名的关键字和保留字总结: 1.js中的关键字: break case catch continue default delete do else finally for function if in instanceof new return switch this throw try typeof var void while with 2.js中的保留字: abstract boolean byte char class const debugger dou
1. js 查找数组中某个字符出现的次数 代码示例 let arr = ['asd', 'green', 'yeadt', 'red', 'wati', 'red', 'red'] let index = arr.indexOf('red') let num = 0 while (index !== -1) { num++ console.log('red 的下标为' + index); index = arr.indexOf('red', index + 1) } console.log('总
JAVA中: public class Test { public static void main(String args[]) { String Str = new String("hello"); System.out.print("返回值 :" ); System.out.println(Str.replace('o', 'T')); System.out.print("返回值 :" ); System.out.println(Str.r
