sinatra - Ruby: creating a class object using the name of the class? -

please don't judge me harshly because new topic don't know how ask question (or search answers):

i learning nested forms in sinatra, encountered don't understand relates ruby.

see code snippet below--while trying test code in rake console, typed in team, , surprised see object created name "team". if type in my_team = team.new(params), error message undefined local variable or method 'params' for main:object

if typed in else, 'man', nameerror: undefined local variable or method 'man' for main:object

why name of class result in instance of class? shouldn't require class_name.new create object?

class team    attr_accessor :name     team = []      def initialize(params)       @name = params[:team][:name]       team << self     end      def self.all       team     end end 

in ruby, object, classes objects (and instances of class class.

team instance of class class (shortened "a class") whereas team.new builds instance of team. instances of class have behavior, allows create instances of via method #new.

now, arguments passed method in ruby must defined in current binding meaning if params undefined, not allowed team.new(params) right off bat. defining local variable (that go binding) before accessing easy :

params = { team: { name: 'stackoverflow' } } team.new(params) 

will work.