Glad to know that

Thank you, pls do share it with your connections 😊

bhai ne kuch videos paid kr di 😁

Welcome

:)

Thanks Saifur

Thank you Yash, not sure if youtube does not show playlist title and description, i have mentioned in both the place that Start from bottom and move Upward, let me check

Thanks there is a complete in depth playlist Manashi:)

@@ConceptandCoding Yes am checking. Thanks again for the content.

Glad it helped!

👍

Thank you

public class PizzaShop { public static void main(String[] args) { BasePizza base = new VegDelight(); System.out.println(base.cost()); BasePizza customPizza = new ExtraCheese(new Mushroom(new Farmhouse())); System.out.println(customPizza.cost()); } }

thank you Prashant. means lot to me.

Thanks buddy

Thanks a lot buddy but call me Shrayansh, we both are students,let's keep learning and sharing

Glad to hear that

Thanks

Thank t

Thanks paji

thank you

thank you

Thank you

Thank you

:)

Thank you

Glad you liked it!

Thank you

Correct, if you want this pattern and design car with this way. Then you are right

Thanks

Hope you will find the content useful 🙏

Thank you

Thank you

Noted, will do it from now

I think main task of Strategy Pattern is to remove redundant code where as Decorator Pattern is used to solve the problem of maintainability of our classes.

Thank you

@@ConceptandCoding

Thanks

Yes will work on old video, but all latest videos are in English only

Thank you so much!

So here inheritance is only used for type matching and composition is used to get the behaviour.

It will give us flexibility in future

Exactly. I have the same question in my mind.

When you want 100% abstraction go for interface, else go for Abstract class

Yes, i know this, but while in interview when we say that i will create an abstract class or interface or concrete class they always ask why so? Why not interface inplace of abstract class, this is has been asked alot. So just a request when ever u make any any interface or abstract class please tell us the why interface or abstract please 🙏

I think in 1 video i did that Vivek, if not then do check the first video of "Live LLD" playlist in that i must have explained it

Here is the timestamp kzfaq.info/get/bejne/Y7uancmrr5ubZKs.html to understand "IS-A" and "HAS-A" relationship

can you implement and show how for the same example which i took.

@@ConceptandCoding sure

from __future__ import annotations from abc import ABC, abstractmethod import enum import string from typing import List class ToppingList(enum.Enum): extra_cheese = 20.00 jalapeno = 30.00 mushroom = 10.00 chicken_tikka = 60.00 class BasePizza(ABC): @abstractmethod def get_ingregents(self) -> List: pass @abstractmethod def cost(self) -> float: pass # concrete pizza class class MargaritaPizza(BasePizza): ingredients: List = ['Cheese','Bread','Olive Oil'] def get_ingregents(self) -> List: return self.ingredients def cost(self) -> float: return 150.00 class VeggiePizza(BasePizza): ingredients: List = ['Cheese','Bread','Olive Oil','Veggies'] def get_ingregents(self) -> List: return self.ingredients def cost(self) -> float: return 200.00 class Topping(BasePizza): _base_pizza: BasePizza = None def __init__(self,base_pizza: BasePizza, topping:string) -> None: self._base_pizza = base_pizza self._topping = topping def get_ingregents(self) -> List: base_ingregents = self._base_pizza.get_ingregents() base_ingregents.append(self._topping) return base_ingregents def cost(self) -> float: return self._base_pizza.cost() + ToppingList[self._topping].value if __name__ == '__main__': base_pizza = MargaritaPizza() margarita_pizza_extra_cheese = Topping(base_pizza,'extra_cheese') print(margarita_pizza_extra_cheese.get_ingregents()) print(margarita_pizza_extra_cheese.cost()) margarita_pizza_extra_cheese_jalapeno = Topping(margarita_pizza_extra_cheese,'jalapeno') print(margarita_pizza_extra_cheese_jalapeno.get_ingregents()) print(margarita_pizza_extra_cheese_jalapeno.cost())

@@ConceptandCoding Hey does the below solution follow any anti pattern wrt to decorator design pattern

this code still maintains 'is-a' and 'has-a' relationship. So that is the requirement of decorator pattern . But here my concern with enum is not decorator pattern but with scalability and managebility lets say i want to add more methodd apart from Cost method like TotalCalories, totalProtein , totalCarbs etc. (lets say 10 -20 methods like this) how easy with enum to support this.

Thank you, sure let me check

had the same question

You have created A,B C different concrete classes. If you want to create new concrete classes with properties of lets say B , with decorator pattern you will have B1 , B2 etc. But without decorator pattern you might have to write more code to not only include the property of B but also its own new property. I hope this helps.

We could have added a list( of class Toppings i.e, superclass for each type of topping) to our pizza class, With decorator pattern used for less variation like veg/ non-veg pizza….?

i won't say its a Recursion, to me its looks like more of a hierarchy. Child-> Parent -> Parent ---> likewise

@@ConceptandCoding but a child might not replicate the same behaviouras that of parent.

@@BeyondTheFamiliar_2023 ummm Why not, in inheritance, child has its Parent capabilities+ additionally its own.

har jaga dsa ghusa do matlab

same question . Can anyone explain same @Concept && Coding - by Shrayansh

Ack

@@ConceptandCoding I didn't understood, had had one doubt could we do this by creating interfaces as well ?

okay, could you please tell me, how you would solve the scenario where you have 1000s of combination like BasePizze, BasePizze + cheese , BasePizza + mushroom, Veggie + cheese and go on...... The biggest advantage decorator pattern adds up is control on number of classes if there are so so many combinations possible.

@@ConceptandCoding Thanks for your reply. Lets suppose Base pizza is extended by two Pizza class Veg and Non Veg Pizza. I have another ExtraAddOn class which is inherited by say cheese, mushroom, paneer and so on ... Now, I have a " vector extraList; " in Veg and Non Veg Pizza class. So, whatever combinations of ExtraAddOn you need, you can add to that list and calculate cost. Only thing is that you cannot mix the base Pizza options, but i don't think that's the requirement here. Am i thinking it wrong ?