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Add LoD

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`@@ -60,3 +60,14 @@ Additional topics:`
`60`	`60`	`- https://github.com/HowProgrammingWorks/Command`
`61`	`61`	`- [Serverless Clouds (FaaS) и изоляция контекстов запросов в Node.js](https://youtu.be/x-Rd6fPV6L8)`
`62`	`62`	`- Слайды: https://www.slideshare.net/tshemsedinov/serverless-clouds-faas-and-request-context-isolation-in-nodejs`
	`63`	`+`
	`64`	`+## Additional topics`
	`65`	`+`
	`66`	`+- Law of Demeter (LoD) - Principle of Least Knowledge or Don't Talk to Strangers`
	`67`	`+ - Low Coupling (LC): The goal of LoD is to reduce coupling by reducing the knowledge of a class about other classes.`
	`68`	`+ - Tell, Don't Ask/Information Expert (TdA/IE): LoD is more specific than TdA/IE because TdA/IE can be applied in a wider context (e.g. for responsibility assignment). Applying TdA leads to solutions which are good according to LoD. Note that the reverse is not true: Accoring to LoD you may get and set values from an object passed as a parameter to a method.`
	`69`	`+ - A method of an object should invoke only the methods of the following kinds of objects:`
	`70`	`+ - itself`
	`71`	`+ - its parameters`
	`72`	`+ - any objects it creates/instantiates`
	`73`	`+ - its direct component objects`

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