Groups > comp.lang.ruby > #2019

Re: How can I generate new variables?

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.albasani.net!news.stack.nl!talisker.lacave.net!lacave.net!not-for-mail
From	"Kyle X." <haebooty@yahoo.com>
Newsgroups	comp.lang.ruby
Subject	Re: How can I generate new variables?
Date	Wed, 30 Mar 2011 22:08:02 -0500
Organization	Service de news de lacave.net
Lines	75
Message-ID	<ddc92babca17a6f4dc20fcb6fef168b5@ruby-forum.com> (permalink)
References	<33ba41ea1d06d357f353d2462a951026@ruby-forum.com> <bec536840ae5b1c75ae0d824c20af7d3@ruby-forum.com>
NNTP-Posting-Host	bristol.highgroove.com
Content-Type	text/plain; charset=UTF-8
Content-Transfer-Encoding	7bit
X-Trace	talisker.lacave.net 1301540897 70303 65.111.164.187 (31 Mar 2011 03:08:17 GMT)
X-Complaints-To	abuse@lacave.net
NNTP-Posting-Date	Thu, 31 Mar 2011 03:08:17 +0000 (UTC)
In-Reply-To	<bec536840ae5b1c75ae0d824c20af7d3@ruby-forum.com>
X-Received-From	This message has been automatically forwarded from the ruby-talk mailing list by a gateway at comp.lang.ruby. If it is SPAM, it did not originate at comp.lang.ruby. Please report the original sender, and not us. Thanks! For more details about this gateway, please visit: http://blog.grayproductions.net/categories/the_gateway
X-Mail-Count	380662
X-Ml-Name	ruby-talk
X-Rubymirror	Yes
X-Ruby-Talk	<ddc92babca17a6f4dc20fcb6fef168b5@ruby-forum.com>
Xref	x330-a1.tempe.blueboxinc.net comp.lang.ruby:2019

Show key headers only | View raw

First off thank you for the reply, and as you can probably tell I am 
very novice at ruby ><. However I am running into a few issues with 
this.

> Using arrays.  An array can contain anything--including other arrays:
>
>
> require 'enumerator'  #not necessary in ruby 1.9
>
> master_arr = []
> data = [1, 2, 3,  4, 5, 6,  7, 8]
>
> data.each_slice(3) do |triplet|
>   master_arr << triplet
> end
>
> p master_arr
>
> --output:--
> [[1, 2, 3], [4, 5, 6], [7, 8]]

I am writing this for SketchUP so I am using Ruby 1.8.6 and am having an 
issue with require 'enumerator', as it does not exist in their library 
as far as I can tell --- in turn the "each_slice" command does not 
function.

I was wondering if you could help me understand this command better as 
well.  "data.each_slice(3) do |triplet|"  The "(3)" here means slice 
after 3 entries in data correct?  The word triplet used, is this word 
required or could it be any word as long as it is consistent below i.e. 
:  do |x| master_arr << x?  Sorry for the basic question, but I just 
want to clarify.

>
> The names of the arrays are:
>
>    master_arr[0]
>    master_arr[1]
>    master_arr[2]
>
> Voila!  But in ruby, you rarely need to refer to index positions in an
> array because you can do this:
>
> master_arr.each do |arr|
>   p arr
> end
>
> --output:--
> [1, 2, 3]
> [4, 5, 6]
> [7, 8]
>
> Or this:
>
> master_arr.each do |arr|
>   new_arr = arr.map do |element|
>     element * 2
>   end
>
>   p new_arr
> end
>
> --output:--
> [2, 4, 6]
> [8, 10, 12]
> [14, 16]

The rest I think I have figured out, but still not 100% on the map 
function.

Thank you again for your time.

-- 
Posted via http://www.ruby-forum.com/.

Thread

How can I generate new variables? "Kyle X." <haebooty@yahoo.com> - 2011-03-30 19:42 -0500
  Re: How can I generate new variables? 7stud -- <bbxx789_05ss@yahoo.com> - 2011-03-30 20:14 -0500
    Re: How can I generate new variables? "Kyle X." <haebooty@yahoo.com> - 2011-03-30 22:08 -0500
      Re: How can I generate new variables? Gunther Diemant <g.diemant@gmx.net> - 2011-03-31 03:08 -0500
        Re: How can I generate new variables? "Kyle X." <haebooty@yahoo.com> - 2011-03-31 14:30 -0500
      Re: How can I generate new variables? Robert Klemme <shortcutter@googlemail.com> - 2011-03-31 03:11 -0500
      Re: How can I generate new variables? 7stud -- <bbxx789_05ss@yahoo.com> - 2011-03-31 20:06 -0500
  Re: How can I generate new variables? "Kyle X." <haebooty@yahoo.com> - 2011-04-02 01:18 -0500
    Re: How can I generate new variables? Robert Klemme <shortcutter@googlemail.com> - 2011-04-04 02:15 -0500

csiph-web