From: google@... (Tom Payne)
Date: 2003-03-25T06:00:03+09:00
Subject: Re: Question about behavior of Array.new

Gavin Sinclair <gsinclair@soyabean.com.au> wrote in message news:<125-2007456129.20030324132059@soyabean.com.au>...

> A common idiom applied to this case yields:
> 
>   board = (0..9).map { Space.new }

Presumably

board = Array(10).map! { Space.new }

is better? map doesn't know how many objects the Range's each method
will return so it creates an empty array and repeatedly pushes objects
onto it. Explicitly calling Array.new creates the right size array
immediately -- much more efficient (not that it matters for one-off
creations with so few elements).

Tom