如何用JavaScript将《程序员的悲歌》四段诗句按逆序输出？

问题原因 #

你当前的写法是将所有诗句拼接为单个长字符串后拆分字符反转，得到的是单个字符倒序的结果，不符合「整首诗按行逆序输出」的需求。

实现方法 #

你可以先将每一行诗句作为独立元素存入数组，反转数组的元素顺序后逐行打印即可：

// 把每行诗句存入数组，顺序和原诗一致
const verses = [
  'I really hate this damned machine',
  'I wish that they would sell it.',
  'It never does quite what I want',
  'But only what I tell it.'
]

// 反转数组顺序，得到行逆序的结果
const reversedVerses = verses.reverse()

// 逐行打印每一句
reversedVerses.forEach(line => console.log(line))

如果要求必须手动写每一行console.log语句，直接调整打印顺序即可：

console.log('But only what I tell it.');
console.log('It never does quite what I want');
console.log('I wish that they would sell it.');
console.log('I really hate this damned machine');

两种写法最终的输出结果都是：

But only what I tell it.
It never does quite what I want
I wish that they would sell it.
I really hate this damned machine

内容的提问来源于stack exchange，提问作者Raquel Lima