From: Robert Klemme <shortcutter@...>
Date: 2009-10-29T05:55:06+09:00
Subject: Re: String Matching Problem

On 10/28/2009 09:22 PM, Matt Brooks wrote:
> I need a way to accomplish the following.  I can't figure out an elegant
> way, beating my head against the wall thinking about it.
> 
> I receive strings into a variable and want to check that string to see
> if it contains at least the beginning of another string.
> 
> 
> say original string is "CHLE,231,1", and i receive string I want to
> check against it.
> 
> I guess you could say the strings are comma separated within each string
> that I receive.
> 
> I need to know it matched if I receive "CHLE,231" or "CHLE,231,1" but if
> I get "CHLE,23" or "CHLE,231,2" these should not be matches, and should
> say nil.
> 
> 
> 
> For Example
> 
> blah = "CHLE,231,1"
> => "CHLE,231,1"
> 
> blah["CHLE,231,1"]
> => "CHLE,231,1"   * GOOD
> 
> blah["CHLE,231"]
> => "CHLE,231"     * GOOD
> 
> blah["CHLE,232"}
> => nil            * GOOD
> 
> blah["CHLE,231,2"]
> => nil            * GOOD
> 
> blah["CHLE,23"]
> => "CHLE,23"      * BAD, I want this to be NIL
> 
> 
> Thanks for the help!!!

You can split your original string into an Array and start testing from 
the first element on.

irb(main):001:0> check = 'CHLE,231,1'
=> "CHLE,231,1"
irb(main):002:0> prepared = check.split /,+/
=> ["CHLE", "231", "1"]

Cheers

	robert


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