#!/usr/bin/ruby
system("rm *~") if File::exists?( "*~" );

#!/usr/bin/ruby                                                                                                                                                                                                  
if File::exists?( /\w*~/ )
  puts "Temp exists\n";
else
  puts "Temp doesn't exist\n";
end

#!/usr/bin/ruby
 
def yes_no(question)
    print question
 
    if gets.chomp =~ /^[yY]/
        return true
    else
       return false
    end
end
 
delete_list = []
 
Dir.new(".").each do |file|
    if file =~ /\w+\~/
        delete_list << file
    end
end
 
puts delete_list.join("\n")
puts '---------------'
if yes_no("delete the previous files? <y/n>: ")
    delete_list.each { |file| File.delete(file) }
end