Ruby

https://gyazo.com/5a8b38b8d8137be9a5a76959bf6c1fd4

code:ruby

class Container

def initialize

@c = {}

@fac = {}

yield self

end

def [] k

end

def []= k, v

end

def factory k, &b

end

end

instance_eval

define_singleton_method

method_missing

TracePoint

code:ruby

module Maybe

def self.fmap f, v; v == nil ? nil : f.call(v); end

def self.apply f, v; f == nil ? nil : fmap(f, v); end

def self.pure v; v; end

def self.return v; v; end

def self.bind v, f; v == nil ? nil : f.call(v); end

end