From: Saeed Bhuta <saeed.bhuta@...>
Date: 2010-02-24T20:12:08+09:00
Subject: Referring to Hash and Array Elements

Hi All,

I am a beginner to Ruby. Currently I am working with Hashes and Arrays.

I have a loop where the code saves several objects into a Hash.
Everytime the loop is run the objects in the Hash are overwritten,
therefore I append the objects into an Array so that data is not lost.

#begining of loop ommitted

                trainHash = {}
                trainHash['order'] = tubeOrder
                trainHash['destination'] = destination
                trainHash['currentLocation'] = currentLocation
                trainHash['dueIn'] = dueInMinsValue
                #trainHash['dueintimestamp'] = dueInTimestamp.to_s

                trainArray << trainHash
             end

From what I have read so far, Arrays are indexed by an integer with
indexing starting at '0'.

So for example, if the above loop was run twice; the number of objects
in the trainArray would be two and referred using [0] for the first
object and [1] for the second object.

My question is, is it possible to refer the elements as they were stored
in the Hash? For example, I want the code to return the value of the
'order' field in the second object in the trainArray.

If not, is it possible to dynamically generate a key for the hash
everytime the loop is run so that the objects are not overwritten in the
hash?

I would sincerely appreciate any help.

Saeed.
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