题解 | #计算某字符出现次数# js 正则
计算某字符出现次数
https://www.nowcoder.com/practice/a35ce98431874e3a820dbe4b2d0508b1
let str = readline().toLocaleLowerCase();
let sk = new RegExp(readline(),'gi');
console.log( str.length - str.replace(sk,'').length)
let sk = new RegExp(readline(),'gi');
console.log( str.length - str.replace(sk,'').length)
