# File lib/rack/utils.rb, line 141 def build_nested_query(value, prefix = nil) case value when Array value.map { |v| build_nested_query(v, "#{prefix}[]") }.join("&") when Hash value.map { |k, v| build_nested_query(v, prefix ? "#{prefix}[#{escape(k)}]" : escape(k)) }.join("&") when String raise ArgumentError, "value must be a Hash" if prefix.nil? "#{prefix}=#{escape(value)}" else prefix end end