From: AW <sturmpanzer@...>
Date: 2002-08-22T04:33:22+09:00
Subject: Re: the power of ruby

puts "#{' ' * i}*" <-- That's a very nice way of doing it.
I think sometimes i forget the "*Everything* is an object" concept. ;)

>I thought it might be interesting to write an iterator:
>
>  WIDTH=78
>
>  def do_dot(i)
>    puts "#{' ' * i}*"
>    sleep 0.01
>  end
>
>  def up_and_down(low, high)
>    low.upto(high-1) do |i|
>      yield i
>    end
>    high.downto(low+1) do |i|
>      yield i
>    end
>  end
>
>  loop do
>    up_and_down(0, WIDTH) do |i|
>      do_dot(i)
>    end
>  end
>
>The idea here is to separate what happens on each iteration from the
>iterating itself, and perhaps to be able to re-use the iterator
>somewhere else.
>
>I also added a sleep, because otherwise the stars jump around a bit too
>much in my terminal (Eterm).
>
>Paul
>