题解 | #计算某字符出现次数#filter
计算某字符出现次数
https://www.nowcoder.com/practice/a35ce98431874e3a820dbe4b2d0508b1
const rl = require("readline").createInterface({ input: process.stdin }); var iter = rl[Symbol.asyncIterator](); const readline = async () => (await iter.next()).value; void async function () { let line = (await readline()).toUpperCase().split(""); let c = (await readline()).toUpperCase(); console.log(line.filter(item=>item==c).length||0) }()