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swift filter 1
[ Swift ] ๊ณ ์ฐจํ•จ์ˆ˜ ๊ฐ„๋‹จํ•˜๊ฒŒ ์ •๋ฆฌํ•ด๋ณด๊ธฐ ( Map, Filter, Reduce )

์•ˆ๋…•ํ•˜์„ธ์š”~ ์˜ค๋Š˜์€ ๊ณ ์ฐจํ•จ์ˆ˜์— ๋Œ€ํ•ด์„œ ์ •๋ฆฌํ•ด๋ณด๋ ค๊ณ  ํ•ฉ๋‹ˆ๋‹ค : ) ๊ณ ์ฐจํ•จ์ˆ˜ ๊ณ ์ฐจ ํ•จ์ˆ˜๋Š” ๋‹ค๋ฅธ ํ•จ์ˆ˜๋ฅผ ์ธ์ž๋กœ ๋ฐ›๊ฑฐ๋‚˜ ํ•จ์ˆ˜ ์‹คํ–‰์˜ ๊ฒฐ๊ณผ๋ฅผ ํ•จ์ˆ˜๋กœ ๋ฐ˜ํ™˜ํ•˜๋Š” ํ•จ์ˆ˜๋ฅผ ๋งํ•ฉ๋‹ˆ๋‹ค. Swift์˜ ํด๋กœ์ €๋Š” ์ผ๊ธ‰ ๊ฐ์ฒด์ด๊ธฐ ๋•Œ๋ฌธ์— ํ•จ์ˆ˜์˜ ์ „๋‹ฌ ์ธ์ž๋กœ๋„ ์ „๋‹ฌ์ด ๊ฐ€๋Šฅํ•˜๋ฉฐ ๊ฒฐ๊ด๊ฐ’์œผ๋กœ ๋ฐ˜ํ™˜์ด ๋‹น์—ฐํžˆ ๊ฐ€๋Šฅํ•ฉ๋‹ˆ๋‹ค. ์ข…๋ฅ˜ map, filter, reduce, forEach, compactMap, flatMap ๋“ฑ์ด ์žˆ์Šต๋‹ˆ๋‹ค ๊ฐ€์žฅ ๋งŽ์ด ์‚ฌ์šฉ๋˜๊ณ  ์žˆ๋Š” ๊ณ ์ฐจ ํ•จ์ˆ˜ 3๊ฐ€์ง€ 1. Map Returns an array containing the results of mapping the given closure over the sequence’s elements. ๊ธฐ์กด์˜ ์ปจํ…Œ์ด๋„ˆ์˜ ์š”์†Œ์— ๋Œ€ํ•ด ์ •์˜ํ•œ ํด๋กœ์ €๋กœ ๋งคํ•‘ํ•œ ๊ฒฐ๊ณผ๋ฅผ ์ƒˆ๋กœ์šด ์ปจํ…Œ์ด๋„ˆ๋กœ ๋ฐ˜ํ™˜ํ•ฉ๋‹ˆ..
iOS/Swift 2022.06.22
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