题解 | #字符串最后一个单词的长度#

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()){
        const reg = /\s+/
        const tokens = line.split(reg);
        const last = tokens[tokens.length - 1];
        console.log(last.length);
    }
}()

要想通过所有的用例，关键在于要考虑多个空格连续的情况。这时候，就得上正则表达式了。