From: Tim Hunter <TimHunter@...>
Date: 2008-01-21T03:13:37+09:00
Subject: Re: Newbie Question about Array#include?

AoP wrote:
> Why does the "include?" method of Array end with a question mark? I
> thought the question mark was to indicate some sort of "unexpected"
> behavior, such as modifying the list, but it doesn't seem to in this
> case.
> 
> Thanks -
> 
> -James
> 

You're thinking of !, not ?. There are no hard-and-fast rules, but 
typically methods that end in ? return true or false, and methods that 
end in ! need extra attention for one reason or another.

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