From Rails to Clojure, Then to Java, Then Back to Rails(engineering-management.space)

   a = ""
   (1..1000).each { |i|
       next if i.odd?
       i *= 2
       i += 1
       a << i.to_s.reverse + ", " # ya ya, trailing comma
   }

    odds = []
    (1..1000).each { |i| odds << i if i.even? }
    doubled = []
    odds.each { |o| doubled << o * 2 }
    incremented = []
    doubled.each { |d| incremented << d + 1 }
    strs = []
    incremented.each { |i| i.to_s }
    a = ""
    strs.each{ |s| a << s.reversed + ", " }