From: Tim Hunter <rmagick@...>
Date: 2006-06-29T02:14:04+09:00
Subject: Re: remove all illegal chars form string

thomas coopman wrote:
> Hi,
> 
> Is there a simple way to remove all but the legal chars from a string. 
> where the legal chars are for example: a-z A-Z 0-9
> So everything should be removed from the string but these characters.
> "exam@p  Le3|�" --> "exampLe"
> 
> I don't know very much about regular expressions, so I don't know if 
> it's possible with sub or gsub.  My first Idea was to loop over the 
> string and check every character but I wondered if there is something 
> more simple or better.
> 
> Thanks

irb(main):006:0> s = "abcd??ABCD!!0123"
=> "abcd??ABCD!!0123"
irb(main):007:0> s
=> "abcd??ABCD!!0123"
irb(main):008:0> s.tr('^a-zA-Z0-9','')
=> "abcdABCD0123"

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