double regexp "foobar"

gistfile1.txt

# -*- coding: utf-8 -*-

# fooが頭に無いbarをファイルに出力する 2

array = ["foo","bar","baz"]

file_name = "./hoge.txt"
f = File.open file_name,"a+"

array.each do |head|
  array.each do |foot|
    str = head + foot

    if !(str =~ /foobar/) && (str =~ /bar/)
      f.puts str
    end

  end
end

f.close