题解 | 删除字符串中出现次数最少的字符

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()){
        let tokens = line.split('');
        let obj = {}
        tokens.map(item => {
            if(obj[item]) {
                obj[item]++
            } else {
                obj[item] = 1
            }
        })
        let min = line.length
        for(let k in obj) {
            if(obj[k] < min) {
                min = obj[k]
            }
        }
        let res = ''
        tokens.forEach(item => {
            if(obj[item] !== min) {
                res += item
            }
        })
        console.log(res)
    }
}()