All possible combinations from a hash of arrays in Ruby

Question

What I have:

Let\'s say I have a hash like this, with various values belonging to one parameter.

a = {}
a[:bitrate] = [\"100\", \"500\", \"1000\"]
a[:f         


        

Answer 1

I believe fl00r's answer is almost perfect but has a drawback. It assumes that hsh.values and hsh.keys will have a matching order, which as far as I know, is not warrantied. So you will probably need an extra step to ensure that. Maybe something like:

def product_hash(hsh)
  keys  = hsh.keys
  attrs = keys.map { |key| hsh[key] }
  product = attrs[0].product(*attrs[1..-1])
  product.map{ |p| Hash[keys.zip p] }
end

But fl00r can correct me if I'm wrong.