Remove duplicates from loop

Question

i have following code.

for i in 0..sold.length-1
    duplicate = sold[i]
    print duplicate.check_duplicates
    print \"     \"
    print sold[i].lotnumber + \         


        

Answer 1

uniq_solds = sold.collect{|s| [s.check_duplicates, s.lotnumber, s.serialnumber]}.uniq

uniq_solds.each do |s|
  p s.join("      ")
end