用正则表达式匹配红宝石中的字符串

Question

I have the following line

'passenger (2.2.5, 2.0.6)'.match(//)[0]

which obviously doesn't match anything yet

I want to return the just the content of (2.2.5, so everything after the open parentheses and before the comma.

How would I do this?

Answer 1

Beanish解决方案在两个以上的版本号上均失败，您应该使用类似以下的方法：

>> 'passenger (2.2.5, 2.0.6, 1.8.6)'.match(/\((.*?),/)[1] # => "2.2.5"

Answer 2

'passenger (2.2.5, 2.0.6)'.match(/\((.*),/)[1]

如果您使用$ 1元素，则是（）中的组

Answer 3

#!/usr/bin/env ruby

s = 'passenger (2.2.5, 2.0.6)'
p s.scan(/(?:\(|, *)([^,)]*)/).flatten    # => ["2.2.5", "2.0.6"]