# File lib/rudy/aws/ec2/instance.rb, line 153
153:       def list(state=nil, inst_ids=[], &each_inst)
154:         instances = list_as_hash(state, inst_ids, &each_inst)
155:         instances &&= instances.values
156:         instances = nil if instances && instances.empty? # Don't return an empty hash
157:         instances
158:       end