From : www.geekmade.co.uk/2008/09/ruby-tip-normalizing-hash-keys-as-symbols/
x = {
:none => String, :png => "file.png", :svg => "file.svg"
}
x.each_except( :key => [:none], :value => [/\.png$/] ) do |k, v|
puts "#{k} -> #{v}"
end
[Validate]