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From: Jeffrey Carter <spam.jrcarter.not@spam.not.acm.org>
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Subject: Re: best practice: error handling
Date: Tue, 31 May 2011 13:35:22 -0700
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Date: 2011-05-31T13:35:22-07:00
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On 05/31/2011 01:02 PM, Dmitry A. Kazakov wrote:
>
> Again, the point is valid, but the example is not good. Zero index is as
> good as Index_Result. In both cases an attempt to use the index will cause
> an exception. So both return an "invalid index."

Hardly. Some valid and fairly common uses include getting the part of Source 
before or after Pattern, both of which can succeed with an invalid result with 
an index of zero.

-- 
Jeff Carter
"Clear? Why, a 4-yr-old child could understand this
report. Run out and find me a 4-yr-old child. I can't
make head or tail out of it."
Duck Soup
94