From: Vladimir <pironim@...>
Date: 2012-04-13T18:52:25+09:00
Subject: Re: How to test if array element exists?

On 04/13/2012 10:31 AM, Soul Surf wrote:
> I'm new to Ruby and just want to test if an array element exists. Here's
> a basic code snippet:
>
> array = [0,1,2,3]
>
> if [array[4]].empty?
>    puts 'empty'
> end
> if [array[4]].nil?
>    puts 'nil'
> end
>
> element 4 does not exist in the array, but neither of the if statements
> result in true? what would be an if statement to check that array[4]
> does not exist? Thanks
>
Answer depends on what you want from check
here is array arr = [1,2,nil,nil]
puts arr[2]
 >> nil
puts arr[3]
 >> nil

You can have nil values as element, so maybe better check arr.length < 
your_element_number