From: "Richard D." <lists@...>
Date: 2012-10-02T11:19:45+09:00
Subject: how to read arrary with an array

Hello.  I believe this is basic question, but I'm just starting to learn
programming and choose Ruby to learn from.  I grabbed Chris Pine's book
Learn to Program to read, try, and learn from.

Anyway, the book had a lesson on creating a table contents using arrays.
Below is his less advance solution he gave.  For the most part I get it.
The problem, I don't understand how to read the arrary within an array,
or more how the pc reads it.  I think that also leads to why I don't
understand the variables being created later as well.

I tried looking around here, and google, but I'm getting results beyond
the lesson and my understanding.  Below is the program and my notes.

Thanks in advance--Rich.

# table of contents using arrays

title = 'Table of Contents'

chapters = [['Getting Started', 1], ['Numbers', 9], ['Letters', 13]]
# array within an array.
# don't understand how to read

puts title.center(50)
puts
chap_num = 1

chapters.each do |chap|
  name = chap[0] # don't undestand chap [0] and chap [1] reference
  page = chap[1] # assuming where in master array to pull data


  beginning = 'Chapter ' + chap_num.to_s + ': ' + name
  ending = 'page ' + page.to_s

  puts beginning.ljust(30) + ending.rjust(20)
  chap_num = chap_num + 1
end

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