This document introduces Covenant Ko and provides some biographical information. It lists Ko's name, company, Github organization and profile, tech blog, and some chapter references. It also includes some sample code snippets and discount policy classes with calculating discount amounts. Various prices are mentioned ranging from 55p to 157p.

1. Ch2.
Covenant Ko
11

2. - Name. Covenant.
- Company. 11번가
- Github 용감한친구들 Organization Founder & Maintainer. https://github.com/brave-people
- Github. https://github.com/KoEonYack
- Tech Blog. https://covenant.tistory.com/ (누적 방문 41만)

3. Ch 0.
Ch 1. ,
Ch 2. ?

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5. ?
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6. ?
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Ch3

9. ?
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11. 앨리스 물병
: 100ml ( )
.
: .
.
55p

12. Car
Engine
142p
Stereo Door
Handle
Pistons SparkPlugs Radio

13. Movie DiscountPolicy calculateDiscountAmount

14. 1. ( )
2. .
3. 2 . (NoneDiscountPolicy )
Movie DiscountPolicy calculateDiscountAmount
합성 장점

15. extends?
Bean
1. ( )
2. .
3. 2 . (NoneDiscountPolicy )
합성 장점

16. 1. ( )
2. .
3. 2 . (NoneDiscountPolicy )
Movie DiscountPolicy calculateDiscountAmount
합성 장점

17. ?

18. ?

22. = !!

23. .
66p

24. .
66p

25. .
66p
, , , , … .
.
…
157p

26. .
1. .
2. .
3. .
4. .

28. AmountDiscountPolicy PercentDiscountPolicy DiscountPolicy
.
63p
.
21p

29. https://duga.tistory.com/2418
http://thetomorrow.kr/archives/7859
.
Covenant

31. Ch2.
Covenant Ko