From: Simon Schuster <significants@...>
Date: 2007-08-17T11:45:54+09:00
Subject: Re: backticks

ahhh, haha. well, the part that got me was it returning a "3" because
I just couldn't find 3 instances of "bar" in there... then I realized,
f-o-o-b. 0, 1, 2, 3. :P

On 8/16/07, Logan Capaldo <logancapaldo@gmail.com> wrote:
> On 8/16/07, Simon Schuster <significants@gmail.com> wrote:
> > whoa, can you explain a little what's going on here? I tried it and
> > changed it around in irb but I can't really figure out what's going
> > on.
> >
>
> #{} just happens to work more places than string literals:
>
> If it helps clear it up, /#{needle}/ is roughly equivalent to
>
> Regexp.new("#{needle}") which is sort of a silly use of interpolation,
> so let's write it as:
> Regexp.new(needle)
>
> So yeah, the string "bar" was used to construct the regexp /bar/.
>
> > >
> > > For added fun, try string interpolation inside regular expressions!
> > >
> > > haystack = "foobarbaz"
> > > needle = "bar"
> > >
> > > haystack =~ /#{needle}/
> > > => 3
> > >
> > > yeah :D
> > >
> > >
> >
> >
>
>