题解 | #子字符串频次#
子字符串频次
https://www.nowcoder.com/practice/053caf9d4d9d449bb45a6b02a572f71b
const _searchStrIndexOf = (str, target) => {
// 补全代码
if(str.length < target.length){
return 0
}
const reg = new RegExp(str, 'g')
return str.match(reg).length
}

