Ruby returning integer-only when item is in an array -

i'm creating reverse polish notation calculator 'warm-up test' school. i've nailed it. issue i'm coming across when run myself, see integer returned (which desired). when plug school's rspec checker returns data in array, it's flagged incorrect.

to fix, built queue.each statement on end. tried in few different positions, not seem matter. there bigger concept extract answer out of array format when evaluate returns answer?

class rpncalculator      def evaluate(string)         holding = []         queue = []         string = string.split(" ").to_a      #jam string array - break on spaces          string.each |x|             if x.match(/\d/)      #number checker. if true throw in queue.              queue << x.to_i       #convert number string             elsif x.match(/\+/)      #math operator checker                 holding << queue[-2] + queue[-1]     #grab queue's last 2 & replace w/ result                 queue.pop(2)                 queue << holding[-1]             elsif x.match(/\-/)                 holding << queue[-2] - queue[-1]                 queue.pop(2)                 queue << holding[-1]                 elsif x.match(/\*/)                  holding << queue[-2] * queue[-1]                 queue.pop(2)                 queue << holding[-1]                 else             end         end             return queue.each { |x| puts x.to_i}     # [-1] in string, queue holds answer     end end 

thank in advance time,

your method (without queue.each) returning result of string.each.

if want return queue, need do that.

class rpncalculator      def evaluate(string)         holding = []         queue = []         string = string.split(" ").to_a      #jam string array - break on spaces          string.each |x|           #...         end         queue[0] # return final result, stored in queue     end end