题解 | #配置文件恢复#

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 isMatch = (str, key) => {
        let j = 0;
        for (let i of str) {
            if (i === key[j]) j++;
            else return false;
        }
        return true;
    };

    let arrMap = new Map();
    arrMap.set("reset board", "board fault");
    arrMap.set("board add", "where to add");
    arrMap.set("board delete", "no board at all");
    arrMap.set("reboot backplane", "impossible");
    arrMap.set("backplane abort", "install first");

    while ((line = await readline())) {
        let tokens = line.split(" ");
        let final = "unknown command";
        if (tokens.length === 1) {
            if (isMatch(line, "reset")) final = "reset what";
        } else if (tokens.length === 2) {
            if (!(
                ((tokens[0] === "r" || tokens[0] === "re") &&
                    tokens[1] === "b") ||
                (tokens[0] === "b" && tokens[1] === "a")
            )) {
                let mapKey = arrMap.keys();
                while ((c = mapKey.next().value)) {
                    let cArr = c.split(" ");
                    if (
                        isMatch(tokens[0], cArr[0]) &&
                        isMatch(tokens[1], cArr[1])
                    ) {
                        final = arrMap.get(c);
                        break;
                    }
                }
            }
        }
        console.log(final);
    }
})();