From: "trans.  (T. Onoma)" <transami@...>
Date: 2004-12-08T15:46:52+09:00
Subject: Re: Ruby 2.0

On Wednesday 08 December 2004 12:52 am, Oliver Cromm wrote:
| Mauricio Fern叩ndez wrote:
| > On Wed, Dec 08, 2004 at 08:53:27AM +0900, trans.  (T. Onoma) wrote:
| >> On Tuesday 07 December 2004 06:12 pm, Oliver Cromm wrote:
| >>| ruby -e'require "matrix";a=[1];(1..10).each{|n| print "
| >>| "*(10-n)*3,a.map{|i|\
| >>| i.to_s.center(6)}.join,$/;a.push(0);a=(Vector[*a]+Vector[*a.reverse]).t
| >>|o_a} '
| >>
| >> A touch smaller:
| >>
| >> ruby -e'require"matrix";a=[1];(1..10).each{|n|print"
| >> "*(10-n)*3,a.map{|i|\
| >> i.to_s.center(6)}.join,$/;a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'
| >
| > Some obvious modifications:
| >
| > ruby -rmatrix -le'a=[1];10.times{|n|print" "*(9-n)*3,"%3d  
| > "*a.size%a;a<<0;a=( Vector[*a]+Vector[*a.reverse]).to_a}'
|
| Obvious once you know the stuff - I'm learning!
|
| > There's still potential for further optimization but I prefer to zzzZZ.
|
| a.size = n+1, better yet:
|
|   ruby -rmatrix -le'a=[1];1.upto(10){|n|print" "*(10-n)*3,"%3d   "*n%a
|   a<<0;a=(Vector[*a]+Vector[*a.reverse]).to_a}'
|
| I found the Vector stuff /kakkou ii/, but without, it's shorter.
| Accepting the extra indent, my shortest now is:
|
|   ruby -le'a=[];10.times{|n|a<<1;print" "*(9-n)*3,"%6d"*(n+1)%a
|   n.downto(1){|i|a[i]+=a[i-1]}}'

Amazing. Is any one making a collection of these?

T.