From: Stefan Rusterholz <apeiros@...>
Date: 2007-07-07T01:47:16+09:00
Subject: Re: keep getting an error saying that this array value is ni

Nathan Taylor wrote:
> elemkeysraw = str.split(/=(?!>)/)
> i = elemkeysraw.length
> scr.printw("This is the value of hashargs is #{hashargs} and it's class 
> is
> #{hashargs.class} and elemkeysraw[i] is #{elemkeysraw[i]}
> elemkeysraw[i].split(/=>/)[0] is #{elemkeysraw[i].split(/=>/)[0]}")
> 
> This is the chunk of code,, and the elemkeysraw[i].split(/=>/)[0] causes 
> an
> error;
> 
> private method `split' called for nil:NilClass (NoMethodError)
> 
> However elemkeysraw[i] provides a value.  What's the deal with this? 
> I'm
> guessing it is because the fact that "i" is not evaluated until runtime, 
> but
> why does the element reference work, but not when attempting to use a 
> string
> method on the value that is contained there?

Nil is a value. [][5] # => nil; "#{nil}" # => ""
Instead of wild guessing, I suggest you do #{elemkeysraw[i].inspect} 
instead of just #{elemkeysraw[i]}. That gives you a better picture what 
you really have, since #{} calls to_s on the value it encloses.

Regards
Stefan

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