From: Greg Willits <lists@...>
Date: 2012-04-21T01:55:36+09:00
Subject: Re: finding duplicates in an array and its index number

Greg Willits wrote in post #1057552:
> I do a lot of indexing of data. Usually they're multi-field records, and
> each data set will have multiple indexes. The technique I use is below.
> This indexes all elements of the array. So, then to find duplicates, you
> have to loop again to find array counts > 1. Anyway, it's a slightly
> different way to do it in the event an index of all entries would be
> useful for lookups.

DOH. That first loop only needed to be:

data.each_with_index do |value, indx|
   if !dataIndex.has_key?(key)
     dataIndex.store(key, [])
   end
   dataIndex[key].push(value)
end

That's what I get for doing a quick transcribe of project code.

-- gw

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