Created
February 6, 2017 14:16
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ajudando o luiz a fazer group_by
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| a = [ {x: 'Abril/17', y: 10}, {x: 'Abril/17', y: 5}, {x: 'Abril/17', y: 2}, {x: 'Dezembro/17', y: 12}, ] | |
| luiz = a.group_by{ |hash| hash[:x] }.map do |k,v| | |
| {:x => k, :y => v.map{ |hash| hash[:y] }.inject(:+)} | |
| end |
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