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 inputArr = [];
    while(line = await readline()){
       inputArr.push(line);
    }
    let count = 0;
    let firstStr = inputArr[0];
    for(let i =0; i<firstStr.length; i++){
        if(firstStr[i].toLowerCase() == inputArr[1].toLowerCase()){
            count ++;
        }
    }
    console.log(count)
}()