题解 | #计算某字符出现次数#

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void async function () {
    // Write your code here
    let str = await readline()
    let target = await readline()
    getIndex(str,target)
}();

function getIndex(str,target){
    let newstr = str.toLocaleLowerCase()
    let n = target.toLocaleLowerCase()
    let xx= newstr.split("").filter((item) => item === n)
    console.log(xx.length)
}