From: Wilson Bilkovich <wilsonb@...>
Date: 2006-11-21T13:38:26+09:00
Subject: Re: array question

On 11/20/06, Li Chen <chen_li3@yahoo.com> wrote:
> Hi all,
>
> I want to build a new array from an old one with every element being
> duplicated except the first and last element. And here are my codes. I
> wonder if this is a real Ruby way to do it.
>

A couple of ways: (there are probably dozens more)
# given:
array = [1,2,3,4,5,6]

# 1.
new_array = array[1..-2]

# 2.
new_array = array.dup
new_array.shift # shifts off the first element
new_array.pop # pops off the last element

#1 uses Array#[], which is a synonym for Array#slice.
1..-2 is a Range parameter. In this case, it says you want a slice of
the array containing everything but the first and last element.