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Merge pull request #317 from Wave1994-Hoon/week9
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[#50~56] [2๊ธฐ] ์งˆ๋ฌธ
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ksy90101 authored Oct 30, 2021
2 parents a104a58 + 8e5e8be commit 5b012a8
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item 50_์ ์‹œ์—_๋ฐฉ์–ด์ _๋ณต์‚ฌ๋ณธ์„_๋งŒ๋“ค๋ผ
- ์งˆ๋ฌธ
- Date ๋กœ ๋งŒ๋“ค์–ด์ง„ ์ฝ”๋“œ๋ฅผ LocalDate ๋กœ ๋ณ€๊ฒฝํ•œ ๊ฒฝํ—˜์ด ์žˆ์œผ์‹ ๊ฐ€์š”?

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item 51_๋ฉ”์„œ๋“œ_์‹œ๊ทธ๋‹ˆ์ฒ˜๋ฅผ_์‹ ์ค‘ํžˆ_์„ค๊ณ„ํ•˜๋ผ
- ์งˆ๋ฌธ
- ํŒจ์Šค

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item 52_๋‹ค์ค‘์ •์˜๋Š”_์‹ ์ค‘ํžˆ_์‚ฌ์šฉํ•˜๋ผ
- ์งˆ๋ฌธ
- ํŒจ์Šค

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item 53_๊ฐ€๋ณ€์ธ์ˆ˜๋Š”_์‹ ์ค‘ํžˆ_์‚ฌ์šฉํ•˜๋ผ
- ์งˆ๋ฌธ
- ํ˜„์—…์—์„œ ๊ฐ€๋ณ€์ธ์ˆ˜๋ฅผ ์ž์ฃผ ์‚ฌ์šฉํ•˜์‹œ๋‚˜์š” ??
- ๊ฐ€๋ณ€์ธ์ˆ˜๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ๊ณผ List๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ๊ฒƒ๊ณผ์˜ ์ฐจ์ด์ ์€ ์–ด๋–ค ๊ฒƒ์ด ์žˆ์„๊นŒ์š” ??

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item 54_null์ด_์•„๋‹Œ_๋นˆ_์ปฌ๋ ‰์…˜์ด๋‚˜_๋ฐฐ์—ด์„_๋ฐ˜ํ™˜ํ•˜๋ผ
- ์งˆ๋ฌธ
- ๋นˆ ์ปฌ๋ ‰์…˜์ด๋‚˜ ๋ฐฐ์—ด๋กœ ์ „๋‹ฌํ•  ์ˆ˜ ์—†๋Š” ํƒ€์ž…์ธ ๊ฒฝ์šฐ (Integer, Long, String ...) null ์ฒ˜๋ฆฌ๋ฅผ ์–ด๋–ค์‹์œผ๋กœ ํ•˜์‹œ๋Š”์ง€ ๊ถ๊ธˆํ•ฉ๋‹ˆ๋‹ค.

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item 55_์˜ต์…”๋„ ๋ฐ˜ํ™˜์€ ์‹ ์ค‘ํžˆ ํ•˜๋ผ
- ์งˆ๋ฌธ
- ์ฑ…์—์„œ ์†Œ๊ฐœ๋œ null ์ฒ˜๋ฆฌ ๋ฐฉ๋ฒ•
- (1) ์˜ˆ์™ธ
- (2) null ๋ฐ˜ํ™˜
- (3) Optional
- null ์ฒ˜๋ฆฌ๋ฅผ ํ•  ๋•Œ ์œ„ 3๊ฐ€์ง€ ์ค‘ ์–ด๋–ค ๋ฐฉ๋ฒ•์„ ์„ ํ˜ธ ํ•˜์‹œ๋‚˜์š” ??

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item 56_๊ณต๊ฐœ๋œ_API_์š”์†Œ์—๋Š”_ํ•ญ์ƒ_๋ฌธ์„œํ™”_์ฃผ์„์„_์ž‘์„ฑํ•˜๋ผ
- ์งˆ๋ฌธ
- ํŒจ์Šค


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