ruby on rails - Jbuilder - Array to JSON -


i have array named sales of following format -- 

2015  january   2403 2015  february  2420 2015  march     2320 2015  april     2230

array structure - [[2015, "january", 2403], [2015, "february", 2420]]

i'm looking construct following json response jbuilder

{  months : ['january', 'february', 'march', 'april']  sales :  [2403, 2420, 2320, 2230] }

things i've tried --

i mapped months (and sales) array -- 

@months = @sales.map {|year, month, sales| [month]}

and in jbuilder --

{"months":[["february"],["january"],["december"],["november"]]}

which isn't want , neither efficient

some nice.

in action:

array = [[2015, "january", 2403], [2015, "february", 2420]] @data = array.transpose

in .json.jbuilder template:

json.months @data[1] json.sales  @data[2]

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