Pull

//+——————————————————————+ //|                                                201111_104313.mqh | //|                                    2019-2020, dimitri pecheritsa | //|                                                 792112@gmail.com | //+——————————————————————+ // //   observer (pull model) – behavioral design pattern // //   from: design patterns: elements of reusable object-oriented software //   by gof: erich gamma, richard helm, ralph johnson, john vlissides //   published in 1994 // //   intent // //   define a one-to-many dependency between … Read more