From: John <nojgoalbyspam@...>
Date: 2002-07-14T04:00:13+09:00
Subject: Re: gsub() replacement containing replaced text

Would it make sense to add this to the Ruby FAQ?

On a related note, I have been reading the Programming Ruby book and there
is a pretty good section on gotchas that might also be good for the FAQ.
Not sure how the authors feel about having the information in both places?
Maybe have a link to the PR section from the FAQ?

John.

"Yukihiro Matsumoto" <matz@ruby-lang.org> wrote in message
news:1026541001.000220.29303.nullmailer@picachu.netlab.jp...
> Hi,
>
> In message "gsub() replacement containing replaced text"
>     on 02/07/13, Harry Ohlsen <harryo@zip.com.au> writes:
>
> |I want to replace all single quotes in a string with backslask followed
by a
> |single quote.  The obvious approach doesn't seem to work, presumably
because
> |the replacement contains the pattern that's been replaced.
>
> "\\'" in a replacement string is substitute by the value of $', so you
> have to say
>
>   x.gsub("'", "\\\\'")
>
> matz.
>
>