题解 | #计算某字符出现次数#

const getShowTimes = (str,chart)=>{
    if(typeof chart != 'string' || chart.length != 1){
        console.log('请输入单个字符');
    } 
    let count  = 0;
    [...str].forEach(item=>{
        if(item.toUpperCase() === chart.toUpperCase()) count ++;
    });
    console.log(count);
}
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
    const param1 = await readline();
    const param2 = await readline();
    getShowTimes(param1,param2);
    while(line = await readline()){
        let tokens = line.split(' ');
        let a = parseInt(tokens[0]);
        let b = parseInt(tokens[1]);
        console.log(a + b);
    }
}()