From: Stefano Crocco <stefano.crocco@...>
Date: 2008-04-14T20:09:08+09:00
Subject: Re: Problem in array

On Monday 14 April 2008, Pranjal Jain wrote:
> Can anyone suggest me the solution for this?

Use a valid index and make sure the element of the array you're testing is not 
nil.

Ruby is complaining that you called the >= method on nil, which doesn't have 
such a method. Since you're using the >= operator on the value returned by 
p[x], this may mean two things:
1) x >= p.size: An array of size n contains n elements, with index from 0 to   
n-1. If you try accessing an element with an index greater than that, Array#[] 
will return nil.
2) x < p.size and p[x] == nil: even if the index is less than the size of the 
array, the array can contain nil elements. For example [1,2,nil,3] has nil as 
the third entry, so calling [1,2,nil,3][2] will return nil.

Since you didn't give any information on how p is obtained, I can't give you a 
more specific advice. If this doesn't help you and you want more suggestions, 
please give us more information.

Stefano