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this ํ‚ค์›Œ๋“œ this๋Š” ์ž์‹ ์ด ์†ํ•œ ๊ฐ์ฒด๋ฅผ ๋˜๋Š” ์ž์‹ ์ด ์ƒ์„ฑํ•  ์ธ์Šคํ„ด์Šค๋ฅผ ๊ฐ€๋ฅดํ‚ค๋Š” ์ž๊ธฐ ์ฐธ์กฐ ๋ณ€์ˆ˜์ž…๋‹ˆ๋‹ค. this๋ฅผ ํ†ตํ•ด ์ž์‹ ์ด ์†ํ•œ ๊ฐ์ฒด ๋˜๋Š” ์ž์‹ ์ด ์ƒ์„ฑํ•  ์ธ์Šคํ„ด์Šค์˜ ํ”„๋กœํผํ‹ฐ๋‚˜ ๋ฉ”์„œ๋“œ๋ฅผ ์ฐธ์กฐํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. // ์ƒ์„ฑ์ž ํ•จ์ˆ˜ function Circle(radius) { // this๋Š” ์ƒ์„ฑ์ž ํ•จ์ˆ˜๊ฐ€ ์ƒ์„ฑํ•  ์ธ์Šคํ„ด์Šค๋ฅผ ๊ฐ€๋ฆฌํ‚ด this.radius = radius; } Circle.prototype.getDiameter = function () { // this๋Š” ์ƒ์„ฑ์ž ํ•จ์ˆ˜๊ฐ€ ์ƒ์„ฑํ•  ์ธ์Šคํ„ด์Šค๋ฅผ ๊ฐ€๋ฆฌํ‚ด return 2 * this.radius; }; // ์ธ์Šคํ„ด์Šค ์ƒ์„ฑ const circle = new Circle(5); console.log(circle.getDiameter()); // 10 ์ž๋ฐ”..

JavaScript/๋ชจ๋˜ ์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ Deep Dive 2022. 7. 26. 21:23
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