From: matz@... (Yukihiro Matsumoto)
Date: 2004-08-03T14:26:34+09:00
Subject: Re: Request for two methods in Array class

Hi,

In message "Request for two methods in Array class"
    on 04/08/03, Mike Hall <mghallNO@SPAMenteract.com> writes:

|1. A new method, Array.combine  (needs a better name for general use).
|   It takes entries from two (or many) arrays and combines them.
|   (like a combination of Array.zip, fetch, and map)

Sounds nice.  But I'm not sure "combine" is a proper name for the
method.   We need more discussion, for example:

  * the best name for the behavior.
  * whether it takes only one argument or any number of arguments.
  * whether "multiplication" should be the default.

|2. A block initializer for Array.new, like that for Hash.new.
|   Good for self-initializing a table of recurrence relations.

Array.new already takes a block, with little bit different behavior
than what you've describe.  In addition,

|    a = Array.new() {|self, i|  2*self[i-1] - self[i-2]}

I assume this accesses self[-1] and self[-2] during the array
initialization, which seem no good.  Perhaps there should be better
way to express what you want.

							matz.