题解 | #坐标移动#

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 arr = line.split(';')
        let directionMap = {
            'A': {
                idx: 0,
                multiple: -1
            },
            'D': {
                idx: 0,
                multiple: 1
            },
            'W': {
                idx: 1,
                multiple: 1
            },
            'S': {
                idx: 1,
                multiple: -1
            }
        }
        let res = [0, 0]
        for (let val of arr) {
            if (/^([A|S|W|D])(\d+)$/.test(val)) {
                let [_, direction, num] = val.match(/([A|S|W|D])(\d+)/)
                num = Number(num)
                let {idx, multiple} = directionMap[direction]
                res[idx] += (multiple * num)
            }
        }
        console.log(res.join(','))
    }
}()

主要点： 1正确匹配字符串

2.字符串分割