From: Chris Gernon <kabigon@...>
Date: 2006-12-29T02:04:02+09:00
Subject: Re: Strip is not stripping trailing whitespace

Charles A Gray wrote:
> line.chop will remove one of the "\240"s. line.chop.chop.chop will
> remove all three, but they will still be on line. To completely remove
> them, use line.chop!.chop!.chop! where line = the string you wish to
> change.

line = line.chop.chop.chop would be better. In general, you shouldn't 
chain destructive methods, because they usually return nil when they 
fail:

irb> line = ''
=> ""
irb> line.chop!
=> nil
irb> line = ''
=> ""
irb(main):004:0> line.chop!chop!
TypeError: $_ value need to be String (nil given)
        from (irb):4:in `chop!'
        from (irb):4

As opposed to:

irb> line = ''
=> ""
irb> line = line.chop.chop.chop
=> ""

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