From: Simon Strandgaard <neoneye@...>
Date: 2004-05-13T14:02:03+09:00
Subject: Re: nasty regexp problem

Francis Hwang wrote:
> I discovered a strange bug in Lafcadio which I'm trying to work out,
> but the regexp is getting really nasty. Basically, to commit text
> values to the database I need to double any apostrophe, except those
> that are preceded by a backslash. This has to account for apostrophes
> at the beginning of the string, and multiline strings where the
> apostrophe is at the start of a new line. Examples would be:
 

irb(main):001:0> "''\\\\'z\\'\\z''".gsub(/ ( (?: [^\\] | \\ . )*? ) ' /x, '\1\'\'')
=> "''''\\\\''z\\'\\z''''"

-- 
Simon Strandgaard