๊ฐ’ ๊ฐœ์ฒด์˜ Null | Enterprise Craftsmanship

์˜ค๋Š˜ ์šฐ๋ฆฌ๋Š” ๊ฐ’ ๊ฐ์ฒด์—์„œ null์„ ์ฒ˜๋ฆฌํ•˜๋Š” ํฅ๋ฏธ๋กœ์šด ์‚ฌ์šฉ ์‚ฌ๋ก€์— ๋Œ€ํ•ด ๋…ผ์˜ ํ•  ๊ฒƒ์ž…๋‹ˆ๋‹ค. null์„ ๊ฐ’ ๊ฐœ์ฒด ์ž์ฒด์— ๋„ฃ๊ฑฐ๋‚˜ nullable ์ฐธ์กฐ ํ˜•์‹ ํ‘œ๊ธฐ๋ฒ• ( ? ๋˜๋Š” Maybe )์„ ์‚ฌ์šฉํ•˜์—ฌ ํ•ด๋‹น ๊ฐ’ ๊ฐœ์ฒด๋ฅผ ์žฅ์‹ ํ•ด์•ผํ•ฉ๋‹ˆ๊นŒ?

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