From: matz@... (Yukihiro Matsumoto)
Date: 2003-02-22T13:58:24+09:00
Subject: Re: Does Struct#to_a guarantee the order of the values

Hi,

In message "Does Struct#to_a guarantee the order of the values"
    on 03/02/22, Tim Hunter <Tim.Hunter@sas.com> writes:

|Suppose I use Struct to generate a class and then create an instance
|of the class like this:
|
|F = Struct.new('F', :x, :y, :z)
|f1 = F.new(1,2,3)
|
|Can I be sure that f1.to_a returns [1,2,3] and never [3,2,1] or
|[2,3,1]? That is, does F#to_a guarantee that the values in the array
|are in the same order that the instance variables were specified to
|Struct.new?
|
|Same for F#members. Will the strings in the array be in the same order
|that the symbols were specified to Struct.new? 

Yes.  Struct is array (not hash) with symbolic index.

							matz.