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My dev Note๐Ÿ“’

TypeScript/ํƒ€์ž…์Šคํฌ๋ฆฝํŠธ TypeScript

[ํƒ€์ž…์Šคํฌ๋ฆฝํŠธ] ์ œ๋„ˆ๋ ˆ์ดํ„ฐ ์ง€์›, ๋ช…์‹œ

2022. 4. 19. 12:57
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์ œ๋„ˆ๋ ˆ์ดํ„ฐ ํ•จ์ˆ˜

์ œ๋„ˆ๋ ˆ์ดํ„ฐ ํ•จ์ˆ˜๋Š” ์—ฌ๋Ÿฌ ๊ฐœ์˜ ๊ฐ’์„ ์ƒ์„ฑํ•˜๋Š” ํŽธ๋ฆฌํ•œ ๊ธฐ๋Šฅ์„ ์ œ๊ณตํ•œ๋‹ค. ์ œ๋„ˆ๋ ˆ์ดํ„ฐ ํ•จ์ˆ˜๋ฅผ ์ด์šฉํ•˜๋ฉด ๊ฐ’์„ ์ƒ์‚ฐํ•˜๋Š” ์†๋„๋„ ์ •๊ตํ•˜๊ฒŒ ์กฐ์ •ํ•  ์ˆ˜ ์žˆ๋‹ค.

//๋‹ค์Œ ํ”ผ๋ณด๋‚˜์น˜ ์ˆซ์ž๋ฅผ ๊ณ„์‚ฐํ•˜๊ธฐ ์œ„ํ•ด a์— b๋ฅผ, b์— a+b๋ฅผ ํ•œ๋ฒˆ์— ๋‹ค์‹œ ํ• ๋‹นํ•œ๋‹ค.

function* createFibonacciGenerator() {
  let a = 0;
  let b = 1;
  while (true) {
    yield a;
    [a, b] = [b, a + b];
  }
}

let fiboancciGenerator = createFibonacciGenerator();
                                        //IterableIterator<number>
console.log(fiboancciGenerator.next()); //{ value: 0, done: false }
console.log(fiboancciGenerator.next()); //{ value: 1, done: false }
console.log(fiboancciGenerator.next()); //{ value: 1, done: false }
console.log(fiboancciGenerator.next()); //{ value: 2, done: false }
console.log(fiboancciGenerator.next()); //{ value: 3, done: false }
console.log(fiboancciGenerator.next()); //{ value: 5, done: false }
console.log(fiboancciGenerator.next()); //{ value: 8, done: false }
console.log(fiboancciGenerator.next()); //{ value: 13, done: false }

์œ„ ์ฝ”๋“œ์˜ createFibonacciGenerator ํ•จ์ˆ˜๋Š” IterableIterator์„ ๋ฐ˜ํ™˜ํ•˜๊ณ , ์ด ์ œ๋„ˆ๋ ˆ์ดํ„ฐ์— next๋ฅผ ํ˜ธ์ถœํ•  ๋•Œ๋งˆ๋‹ค ๋‹ค์Œ ํ”ผ๋ณด๋‚˜์น˜ ๊ฐ’์„ ๊ณ„์‚ฐํ•ด์„œ ๊ฒฐ๊ณผ๋ฅผ ๋ฐฉ์ถœํ•œ๋‹ค. ํƒ€์ž…์Šคํฌ๋ฆฝํŠธ์—์„œ ๋ฐฉ์ถœ๋œ ๊ฐ’์„ ์ด์šฉํ•ด ๋ฐ˜๋ณต์ž์˜ ํƒ€์ž…์„ ์ถ”๋ก ํ•œ๋‹ค.

 

๋‹ค์Œ ์˜ˆ์ฒ˜๋Ÿผ IterableIterator ์—์„œ ๋ฐฉ์ถœํ•˜๋Š” ํƒ€์ž…์„ ๊ฐ์‹ธ์„œ ์ œ๋„ˆ๋ ˆ์ดํ„ฐ ๋ฐ˜ํ™˜ ํƒ€์ž…์„ ๋ช…์‹œํ•˜๋Š” ๋ฐฉ๋ฒ•๋„ ์žˆ๋‹ค.

function* createNumbers(): IterableIterator<number> {
  let n = 1;
  while (true) {
    yield n++;
  }
}
let numbers = createNumbers();
console.log(numbers.next()); //{ value: 1, done: false }
console.log(numbers.next()); //{ value: 2, done: false }
console.log(numbers.next()); //{ value: 3, done: false }

 

์š”์•ฝํ•˜์ž๋ฉด ์ œ๋„ˆ๋ ˆ์ดํ„ฐ๋Š” ์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ์˜ ์ •๋ง ๋ฉ‹์ง„ ๊ธฐ๋Šฅ์ด๋ฉฐ ํƒ€์ž…์Šคํฌ๋ฆฝํŠธ์—์„œ๋„ ์ง€์›ํ•œ๋‹ค๋Š” ์‚ฌ์‹ค์ด๋‹ค.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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