From: OZAWA -Crouton- Sakuro <crouton@...>
Date: 2001-04-08T20:20:16+09:00
Subject: [ruby-talk:13555] RE: array question

At Sun, 8 Apr 2001 17:27:12 +0900,
Tjabo Kloppenburg <tk@hcsd.de> wrote:

> arr[1000] = 1
> puts arr.size
> -> 1001
> I expected to get "1" - because there's only one element in the array.

An Array automtically enlarges its capacity to the given index, and
unspecified elements are all filled as nil.

If you just want to count non-nil elements in a array, use compact.

arr = Array.new
arr[1000] = 1
puts arr.compact.size
#=> 1
arr.compact!
puts arr.size
#=> 1
-- 
OZAWA -Crouton- Sakuro
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