From: dblack@...
Date: 2006-12-21T07:44:39+09:00
Subject: Re: Searching Stings with Arrays?

Hi --

On Thu, 21 Dec 2006, William James wrote:

> 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.
>
> Are you sure?
>
> array.find{|s| @string[/\b#{s}\b/] }

Thanks.  I had this weird feeling something was wrong when I sent that
message....  I think the 'b' variable name fooled me :-)


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)