From: Rick DeNatale <rick.denatale@...>
Date: 2010-08-15T01:25:29+09:00
Subject: Re: Creating an array of hashes and having issues

On Sat, Aug 14, 2010 at 10:17 AM, Alpha Blue <jdezenzio@gmail.com> wrote:
> I have an array that contains 36 objects.  The composition of those
> objects includes a date, a team, and a time.  It is being parsed from
> another site.
>
> [0] = Sept 2
> [1] = vsSouthern Miss
> [2] = 7:30 PM ET
> [3] = Sept 9
> [4] = @Florida
> [5] = 7:30 PM ET
> etc.
>
> Every 3 objects should be combined into a specific hash row.
>
> [0][:date] = Sept 2
> [0][:team] = vsSouthern Miss
> [0][:time] = 7:30 PM ET
> [1][:date] = Sept 9
> [1][:team] = @Florida
> [1][:time] = 7:30 PM ET
> etc.
>
> I'm having trouble accomplishing this.  Each schedule might have more
> than 36 objects in the array, but the divisor will always be 3 in terms
> of what type of information is presented.  So, a team might have an
> array of 39 objects or 42 objects but in the end, the objects are a
> date, team, and a time.
>
> I've tried numerous things, even adding a new class method:
>
> class Array
>  def to_spec_hash(other)
>    Hash[ *(0...self.size()).inject([]) { |arr, ix| arr.push(self[ix],
> other[ix]) } ]
>  end
> end
>
> and then trying to use:
>
> %W{ date team time }.to_spec_hash( %W{ value1 value2 value3 etc. } )
>
> but I'd have to iterate over date team and time according to how many
> rows of data divided by 3 would be and the same for the values.  Again,
> I know it's sloppy.
>
> I'm sure there's a much faster and a cleaner way of accomplishing this
> but I'm lacking sleep and therefore not thinking as clearly.
>
> Any help would be appreciated.

Is this what you want?

input = [
  "Sept 2",
  "vsSouthern Miss",
  "7:30 PM ET"     ,
  "Sept 9"         ,
  "@Florida"       ,
  "7:30 PM ET"
]

input.extend Enumerable

p input.enum_for(:each_slice, 3).map { |date, team, time|
  {:date => date, :team => team, :time => time}

}

[{:date=>"Sept 2", :team=>"vsSouthern Miss", :time=>"7:30 PM ET"},
{:date=>"Sept 9", :team=>"@Florida", :time=>"7:30 PM ET"}]


This is written for 1.8.6, for 1.8.7 or 1.9.x Enumerable is built in
in 1.9 and you can get the enumerator by calling each_slice without a
block.

p (input.each_slice(3)).map { |date, team, time|
  {:date => date, :team => team, :time => time}

}

In any event if it were me I'd make a Game class, or at least use an
OpenStruct instead of a Hash
-- 
Rick DeNatale

Blog: http://talklikeaduck.denhaven2.com/
Github: http://github.com/rubyredrick
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