题解 | #简单密码#

//总感觉这么列出来有点傻
let str = 'abcdefghijklmnopqrstuvwxyz';
let book = {
    2: 'abc',
    3: 'def',
    4: 'ghi',
    5: 'jkl',
    6: 'mno',
    7: 'pqrs',
    8: 'tuv',
    9: 'wxyz'
}
while(line = readline()) {
    const arr = line.split('');
    let newArr = arr.map((item) => {
        if(/[A-Z]/.test(item)) {
            let char = item.toLowerCase();
            let index = str.indexOf(char);
            return index != 25 ? str.charAt(index+1) : 'a';
        } else if(/[a-z]/.test(item)) {
            return getBook(item);
        } else {
            return item;
        }
    })
    print(newArr.join(''));
}

function getBook(target) {
    let reg = new RegExp(target, 'i');
    let num;
    for (let key in book) {
        if (book[key].match(reg)) {
            num = key;
            break;
        }
    }
    return num;
}