Convert this hash to a query string:

{ :name => "Bob",
  :address => {
    :street => '111 Ruby Ave.',
    :city => 'Ruby Central',
    :phones => ['111-111-1111', '222-222-2222']
  }
}.to_params
#=> "name=Bob&address[city]=Ruby Central&address[phones]=111-111-1111222-222-2222&address[street]=111 Ruby Ave."

Source Code

# File merb/core_ext/hash.rb, line 87
def to_params
  params = ''
  stack = []

  each do |k, v|
    if v.is_a?(Hash)
      stack << [k,v]
    else
      params << "#{k}=#{v}&"
    end
  end

  stack.each do |parent, hash|
    hash.each do |k, v|
      if v.is_a?(Hash)
        stack << ["#{parent}[#{k}]", v]
      else
        params << "#{parent}[#{k}]=#{v}&"
      end
    end
  end

  params.chop! # trailing &
  params
end