题解 | #计算某字符出现次数#
计算某字符出现次数
http://www.nowcoder.com/practice/a35ce98431874e3a820dbe4b2d0508b1
var str = readline() var key = readline() var num = 0 const str_arr = str.split('') str_arr.forEach(item=>{ if(key.toLowerCase() == item.toLowerCase()){ num ++ } }) console.log(num); 思路: 字符串转为数组命名一个num数量,全部转小写,然后for循环比较累加