From: Ian Whitlock <iw1junk@...>
Date: 2007-07-28T23:28:21+09:00
Subject: Re: How to delete array element and add to previous element

Morton Goldberg wrote:
> On Jul 27, 2007, at 12:55 PM, Morton Goldberg wrote:
> 
> <code>
> raw_data = DATA.read
> data = []
> recd = nil
> raw_data.each do |line|
>     row = line.chomp.split("\t")
>     if row[0].empty?
>        recd[2] << row[2]
>     else
>        data << (recd = row)
>     end
> end
> p data
> </code>

Great lesson for a Ruby Newbie!  I had to
struggle with why

    recd[2] << row[2]

changed data, but once one understands,
it is an eye opener.  Page 41 of Programming
Ruby explains, and yells gotcha at me.  Your
code turns it into a tool.

In a more traditional (less ruby) form:

> raw_data = DATA.read
> data = []
  i = -1
> raw_data.each do |line|
>     row = line.chomp.split("\t")
      if not row[0].empty?  # new logical line
         i += 1
         data[i] = row
>     else                  # continuation
         data[i][2] << row[2]
>     end
> end
> p data

Thanks, again.
Ian
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