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
    // while(line = await readline()){}
    const str = await readline()
    const char = await readline()
    let count = 0
    for(s of str) {
        if(s.toLocaleLowerCase() === char || s.toLocaleUpperCase() === char) count ++
    }
    console.log(count)
}()