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๐Ÿšฉ: union type์œผ๋กœ ์„ค์ •ํ•œ ๋ฐฐ์—ด ํ•จ์ˆ˜
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โ€Žsrc/data/arr.tsโ€Ž

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export const arrNumber = [2, 6, 3, 6, 5];
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export const arrString = ['1'];

โ€Žsrc/index.tsโ€Ž

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//return ๊ฐ’์˜ ํƒ€์ž…์„ ์ง€์ •ํ•˜์ง€ ์•Š์œผ๋ฉด ์ž๋™์œผ๋กœ void๋กœ ์„ค์ •์„ ํ•ด์ค€๋‹ค.
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const add = (a: number, b: number) => {
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const result = a + b;
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console.log(result);
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}
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import { arrNumber, arrString } from "./data/arr";
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add(1, 2);
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const showItems = (arr: string[]) => {
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arr.forEach(element => console.log(element));
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}
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//์—ฌ๊ธฐ์„œ ํ•จ์ˆ˜ ์ž์ฒด ํŒŒ๋ผ๋ฉ”ํ„ฐ์—์„œ๋„ ํƒ€์ž…์„ ๊ฐœ๋ฐœ์ž๊ฐ€ ์ง์ ‘ ๋„ฃ์–ด๋ณผ ์ˆ˜ ์žˆ์ง€ ์•Š์„๊นŒ?
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showItems(arrString);

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