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('');
        const map = new Map();
        tokens.forEach((el) => {
            if (map.has(el)) {
                map.set(el, map.get(el) + 1)
            } else {
                map.set(el, 0)
            }
        })
        const minN = Math.min(...map.values());
        const res = [...map].filter((value, key) => {
            return value[1] !== minN;
        })
        let newMap = new Map(res);
        const newRes = tokens.filter(v => {
            return [...newMap.keys()].includes(v);
        })
        console.log(newRes.join(''));
    }
}()