>> You don't need each_with_index for that. You have the list of articles
>> in @array_of_splits, so you just use [] to get the correct article:
>>
>> choice = gets.to_i - 1 # the array starts at 0
>> @array_of_splits[choice] # returns the Article, show the fields you want
>>
>> Jesus.
>
> Yes, but it returns me #<Article:0xb78c49a4>, not a title and a text!

The Article object should have a title and a text.
A way to get a title is :

choice = gets.to_i - 1 # the array starts at 0
article = @array_of_splits[choice] # returns the Article, show the
fields you want
title = article.title

In the similar way, a text can be acquired. But we don't know a name
of an Article object's method to obtain a text.
You should know the name of the method.

Regards,

-- 
NOBUOKA Yuya