题解 | 字符串加密

没什么难的，最重要就是理解题意，然后按题目步骤做就行了（这个题目的文字很别扭，看了好多遍才看懂……）

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
    let s = await readline()
    let t = await readline()

    // 1. 去重
    const newAlphabet = [...new Set([...s])]
    // 2. 填充得到新字母表
    const originalAlphabet = [...'abcdefghijklmnopqrstuvwxyz']
    originalAlphabet.forEach((x, i) => {
        const hasLetter = newAlphabet.some(y => y === x)
        if (!hasLetter) newAlphabet.push(x)
    })
    // 3. 对t处理，在originalAlphabet找到下标，通过下标找到newAlphabet中对应的字母然后替换
    let targetStrArr = [...t]
    let resArr = []
    targetStrArr.forEach(x => {
        const index = originalAlphabet.indexOf(x) 
        resArr.push(newAlphabet[index])
    })
    console.log(resArr.join(''));
}()