From: Robert Klemme <shortcutter@...>
Date: 2008-06-11T03:29:52+09:00
Subject: Re: replacing a character in a string

On 10.06.2008 20:19, Amanda .. wrote:
> So I want to be able to take a string with underscores in it ('_') and
> replace those with spaces...can somebody please tell me why this isn't
> working:
> 
> if cal_name.include? '_'
>    cal_name.sub!('_', ' ')
> end
> 
> I can't see why this isn't doing the trick...but maybe I'm doing
> something wrong. If anyone could give me any idea of what's wrong..or
> even a different approach, that would be great!

Works for me - but if you use sub instead of gsub only the first 
occurrence is replaced.

irb(main):001:0> s="a_b"
=> "a_b"
irb(main):002:0> s.include? "_"
=> true
irb(main):003:0> s.sub '_', ' '
=> "a b"
irb(main):004:0> s="a_b_c"
=> "a_b_c"
irb(main):005:0> s.sub '_', ' '
=> "a b_c"
irb(main):006:0>

I'd do just this:

irb(main):006:0> s.gsub '_', ' '
=> "a b c"

Or, in your case use gsub! - but without the check (unnecessary overhead).

Kind regards

	robert