From: Michal Suchanek <hramrach@...>
Date: 2007-05-08T21:50:54+09:00
Subject: Re: general purpose chomp?

On 08/05/07, Robert Klemme <shortcutter@googlemail.com> wrote:
> On 08.05.2007 14:11, Michal Suchanek wrote:
> > I wonder why we do not have one. Or maybe I just overlooked something?
> >
> > class String
> >  def lstripc c = ' \r\t\n'
> >    c = c.chr if c.kind_of? Integer
> >    idx = 0
> >    while c.include? self[idx]
> >      idx += 1
> >    end
> >    self[idx..-1]
> >  end
> > end
>
> irb(main):016:0> s = "\r\n\tfoo"
> => "\r\n\tfoo"
> irb(main):017:0> s.lstrip!
> => "foo"
> irb(main):018:0> s
> => "foo"
>
> If you want more control, the "general purpose" methods would be sub,
> sub!, gsub and gsub!:
>
> irb(main):001:0> s = "\r\n\tfoo"
> => "\r\n\tfoo"
> irb(main):002:0> s.sub! %r{\A[\r\n\s]+}, ''
> => "foo"
> irb(main):003:0> s
> => "foo"
>
> irb(main):009:0> s = "\r\n\tfoo"
> => "\r\n\tfoo"
> irb(main):010:0> s.sub! %r{\A\s+}, ''
> => "foo"
> irb(main):011:0> s
> => "foo"
>

Yes, sub! is the thing that would do chomp for things other than \r\n\t.
Not as easy but it surely works.

Thanks

Michal