From: Robert Dober <robert.dober@...>
Date: 2006-12-21T07:18:19+09:00
Subject: Re: Searching Stings with Arrays?

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On 12/20/06, dblack@wobblini.net <dblack@wobblini.net> wrote:
>
> Hi --
>
> On Thu, 21 Dec 2006, Phil Cooperking wrote:
>
> > Hi, I've been having a little problem with this. most of my ruby is from
> > rails and both are shaky.
> >
> > okay what I've got is a string (which is a browser user agent) and I
> > would like to search that string with a predefined array of browsers.
> > I've done this in php so I'm positve an easy solution exists in Ruby
> >
> > this is what I got
> > @string = "mozilla/5.0 (macintosh; u; ppc mac os x; en)
> > applewebkit/418.9.1 (khtml, like gecko) safari/419.3"
> >
> > array = ["shiira", "msie", "safari",  "firefox", "netscape"]
> >
> > so I'd like to search the string for any matches, it should stop at
> > safari and bob's sombodys uncle.
> >
> > this is what I've been trying to do.
> > array.find {|b| b == @string}.to_s
> >
> > this does't work I know, but I'm I in the right direction?
>
> You could use:
>
>    @string.include?(b)
>
> or, if you want to be more careful about false positives (like, if
> "msie" was a substring in some other browser's string), you could do:
>
>    array.find {|b| @string[/#{b}/] }
>
> which anchors to word boundaries.  (All untested, so check for typos
> and/or logic errors :-)


Reminds me of Knuth's great saying
Beware of this code, I have only proved it correct, I have never tried it!
You'll be allright ;)

David
>
> --
> Q. What's a good holiday present for the serious Rails developer?
> A. RUBY FOR RAILS by David A. Black (http://www.manning.com/black)
>     aka The Ruby book for Rails developers!
> Q. Where can I get Ruby/Rails on-site training, consulting, coaching?
> A. Ruby Power and Light, LLC (http://www.rubypal.com)
>
>
R

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