替换 rails 中两个标记之间的某个字符串？

Question

我想在插入数据库（我正在处理文本区域）之前将代码标记（在我的例子中是```）之间的 "br" 标记替换为 "br" 标记，示例：

```
echo "Hello";
echo "World!";
```

first line.
second line.

会变成：

```<br/>echo "Hello";<br/>echo "World!";<br/>```
first line .
second line .

Answer 1

str = %q{
```
echo "Hello";
echo "World!";
```

first line.
second line.
}

pattern = %r{
  `{3}
  .*? 
  `{3}
}xm

str.gsub!(pattern) do |match|
  match.gsub!("\n", '<br/>')
end

puts str

--output:--

```<br/>echo "Hello";<br/>echo "World!";<br/>```

first line.
second line.

替换 rails 中两个标记之间的某个字符串？

Replace a certain string between two markers in rails?

ruby

regex

ruby-on-rails

gsub