From: Jeffrey Bowen <ja_bowen@...>
Date: 2007-07-06T04:52:29+09:00
Subject: Re: array difference

Thanks.  inspect showed the problem.


--- Xavier Noria <fxn@hashref.com> wrote:

> On Jul 5, 2007, at 9:20 PM, Jeffrey Bowen wrote:
> 
> > I�m trying to create an array containing the
> > difference of the two other arrays.  When I create
> the
> > arrays manual I have no problems.
> >
> > a = ["0001", "0002"]
> > b = ["0001", "0002", "0003"]
> > c = b - a
> > puts c
> > c -> 0003
> >
> > However when the array is created from data in a
> file
> > d will equal the first array not the difference
> > between the two.
> >
> > File.open("datafilelist.txt").each { |h|
> data_files1
> > << h}
> >
> > d = data_files1 - data_files
> > puts d
> > -> 0001, 0002
> 
> I guess the trailing newline in the elements of
> data_files1 is the  
> culprit. In that case push h.chomp instead of h. In
> any case, inspect  
> the arrays.
> 
> -- fxn
> 
> 
> 



       
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