Created
April 29, 2013 22:10
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Rails index_by to help order by the order of id arrays
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| ids = [111, 22, 332, 34, 445] | |
| athletes = Athlete.where(:id => ids).index_by(&:id) | |
| unless athletes.empty? | |
| athletes = ids.map{|id| athletes[id]} | |
| athletes.compact! | |
| end |
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