# Law of demeter

> 디메터 법칙.

디메터 법칙.

1. Each unit should have only limited knowledge about other units: only units "closely" related to the current unit.
2. Each unit should only talk to its friends; don't talk to strangers.
3. Only talk to your immediate friends.

## Memo

> The law dates back to <1987> when it was first proposed by <Ian Holland>, who was working on the Demeter Project. This project was the birthplace of a lot of [Aspect-oriented programming](https://wiki.g15e.com/pages/Aspect-oriented%20programming.txt) principles.[^1]

## Footnotes

[^1]: https://en.wikipedia.org/wiki/Law_of_Demeter