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c_decorator.mq5 (6.35 KB) 조회

• Inheritance is not always flexible.

• Composition and delegation is sometimes a good alternative to dynamically add new behavior.

• Decorator type matches component type.

• Decorators change component behavior without changing the component code.

• A component may have arbitrary number of decorators.

• Decorators are transparent to the client, unless the client depends on a particular component.

RULE: Open classes for extension and close for changes.

Sudoku

Classical Sudoku puzzle right in MetaTrader chart.

Trading the trend

Encapsulating a family of interchangeable algorythms which can be modified independently from the client.

When the subject changes, it notifies and updates its observers, who know nothing about each other.

Programming Patterns - Decorator - MetaTrader 5용 스크립트