ruby - Ruby - 如何将单换行符更改为双换行符？

Question

假设我在一个名为“tao”的文件中有这个：

If you can talk about it, it ain't Tao. If it has a name, it's just another thing.  
Tao doesn't have a name. Names are for ordinary things.

我想用红宝石打开它，并将其更改为：

If you can talk about it, it ain't Tao. If it has a name, it's just another thing.
  
Tao doesn't have a name. Names are for ordinary things.

我知道如何读取文件，并将内容放入字符串（我们称之为tao_string），但我不确定如何将单换行符更改为双换行符。我会通过正则表达式怀疑某些东西，但我不知道从哪里开始。

Answer 1

你可以这样做gsub：

tao_string2 = tao_string.gsub("\n", "\n\n")

或就地gsub!：

tao_string.gsub!("\n", "\n\n")

这将用双换行符替换字符串中的所有换行符。