Ruby shares many of its eclecticism's with Perl - lots of ways of doing the same thing, though it doesn't go quite so far (some would say so far beyond the reasonable) as Perl does. So when you come to create or manipulate an array (really an ordered list) there's a big choice.
  indian = ["Refa","Melksham Tandoori","Broughton Balti"]
or
  alternatives = %w(Lee's McDonalds Subway Grapes)
quite apart from a wide range of methods that will set up an array.

When you come to add something on to the end of an array, there's even more variety:
  indian.push "Taj Mahal"
or
  indian.push "The Palace on Wheels"
or
  indian << "Sultan"
or
  indian[6] = "Goa"
or
  indian += ["Amritsar Star"]
or
  indian[indian.length] = "The Curry House"
or
  indian += alternatives

And when you come to iterate through it - well - have a look at the source of an example I've posted [here].

Once you've got a number of arrays, how can you combine them / manipulate them? Ruby's built in operators, running on array, can be used to and them (with &) and or them (with |) - allowing you to create a new array that contains only members that are common to both incoming arrays, or to create a new array that contains a members of both arrays combined, but eliminating the duplicate copy of members that appear in both. There's an example [here].
(written 2010-09-30, updated 2010-10-01)

 R107 - Collections (Arrays and Hashes) in Ruby
  [991] Adding a member to a Hash in Ruby - (2006-12-16)
  [2291] Collection objects (array and hash) in Ruby - (2009-07-16)
  [2606] Sorting arrays and hashes in Ruby - (2010-01-30)
  [2618] What are Ruby Symbols? - (2010-02-02)
  [2621] Ruby collections and strings - some new examples - (2010-02-03)
  [3253] Is this number between? Does this list include? - Ruby - (2011-04-18)
  [3255] Process every member of an array, and sort an array - Ruby - (2011-04-21)
  [3257] All possible combinations from a list (Python) or array (Ruby) - (2011-04-23)
  [3435] Sorta sorting a hash, and what if an exception is NOT thrown - Ruby - (2011-09-12)
  [3757] Ruby - a teaching example showing many of the language features in short but useful program - (2012-06-09)
  [4368] Shuffling a list - Ruby and Python - (2014-12-28)
  [4499] Significant work - beyond helloworld in Ruby - (2015-05-27)
  [4502] Reading and parsing a JSON object in Ruby - (2015-06-01)

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Ruby - examples of regular expressions, inheritance and polymorphism
Ruby - yield; parallel routines
Christmas 2010 - Well House Manor, Melksham, Hotel
What is a factory method and why use one? - Example in Ruby
Creating, extending, traversing and combining Ruby arrays
Why do I need brackets in Ruby ... or Perl, Python, C or Java
Formatting your output - options available in Ruby
Learning to program - where to start if you have never programmed before
Some more advanced Perl examples from a recent course
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