๋ชฉ๋ก๐Ÿ‘ฉ‍๐Ÿ’ป ๋ฐฑ์—”๋“œ(Back-End)/Node js (108)

๐Ÿ˜Ž ๊ณต๋ถ€ํ•˜๋Š” ์ง•์ง•์•ŒํŒŒ์นด๋Š” ์ฒ˜์Œ์ด์ง€?

[E-Commerce App with REST API] (18) ์œ„์‹œ๋ฆฌ์ŠคํŠธ์— ์ƒํ’ˆ ๋„ฃ๊ธฐ (PUT) & ์ƒํ’ˆ ๋ณ„์  ๋งค๊ธฐ๊ธฐ (PUT)

=> Node.js E-Commerce App with REST API: Let's Build a Real-Life Example! ๐ŸŒท ์œ„์‹œ๋ฆฌ์ŠคํŠธ์— ์ƒํ’ˆ ๋„ฃ๊ธฐ ๐ŸŒท ์ƒํ’ˆ ๋ณ„์  ๋งค๊ธฐ๊ธฐ ํŠน์ • field์˜ ๊ฐ’์„ ์ˆ˜์ •ํ•  ๋• $set ์—ฐ์‚ฐ์ž๋ฅผ ์‚ฌ์šฉ $elemMatch ๋ฐฐ์—ด์•ˆ์— ducument ์—ฌ๋Ÿฌ ํ•„๋“œ๋ฅผ ์กฐ๊ฑด ๊ฑธ์–ด์„œ ์ฐพ์„ ๋•Œ ์‚ฌ์šฉ โœ… Map : ๋ฐฐ์—ด ๋‚ด์˜ ๋ชจ๋“  ์š”์†Œ ๊ฐ๊ฐ์— ๋Œ€ํ•˜์—ฌ ์ฃผ์–ด์ง„ ํ•จ์ˆ˜๋ฅผ ํ˜ธ์ถœํ•œ ๊ฒฐ๊ณผ๋ฅผ ๋ชจ์•„ ์ƒˆ๋กœ์šด ๋ฐฐ์—ด์„ ๋ฐ˜ํ™˜ ๋ฐฐ์—ด.map((์š”์†Œ, ์ธ๋ฑ์Šค, ๋ฐฐ์—ด) => { return ์š”์†Œ }); โœ… Reduce : ๋ฐฐ์—ด์„ ์ˆœํšŒํ•˜๋ฉด์„œ ์ฝœ๋ฐฑ ํ•จ์ˆ˜๋ฅผ ๋ฐ˜๋ณต ์‹คํ–‰ํ•˜๊ณ , ๋ชจ๋“  ๋ฐ˜๋ณต์˜ ๊ฒฐ๊ณผ๋ฅผ ํ•˜๋‚˜์˜ ๊ฐ’์œผ๋กœ ์ค„์ด๋Š”(reduce) ํ•จ์ˆ˜ ๋ฐฐ์—ด.reduce((๋ˆ„์ ๊ฐ’, ํ˜„์žฟ๊ฐ’, ์ธ๋ฑ์Šค, ์š”์†Œ) => { return ๊ฒฐ๊ณผ }, ์ดˆ..