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diff --git a/files/ko/web/javascript/reference/global_objects/object/fromentries/index.html b/files/ko/web/javascript/reference/global_objects/object/fromentries/index.html new file mode 100644 index 0000000000..4d74fc326a --- /dev/null +++ b/files/ko/web/javascript/reference/global_objects/object/fromentries/index.html @@ -0,0 +1,98 @@ +--- +title: Object.fromEntries() +slug: Web/JavaScript/Reference/Global_Objects/Object/fromEntries +tags: + - JavaScript + - Method + - Object + - Reference +translation_of: Web/JavaScript/Reference/Global_Objects/Object/fromEntries +--- +<div>{{JSRef}}</div> + +<p><code><strong>Object.fromEntries()</strong></code> 메서드는 키값 쌍의 목록을 객체로 바꿉니다.</p> + +<div>{{EmbedInteractiveExample("pages/js/object-fromentries.html")}}</div> + +<h2 id="구문">구문</h2> + +<pre class="syntaxbox">Object.fromEntries(<var>iterable</var>);</pre> + +<h3 id="매개변수">매개변수</h3> + +<dl> + <dt><code>iterable</code></dt> + <dd>반복 가능한 객체. 즉, {{jsxref("Array")}}, {{jsxref("Map")}} 또는 <a href="/ko/docs/Web/JavaScript/Reference/Iteration_protocols">반복 규약</a>을 구현한 기타 객체.</dd> +</dl> + +<h3 id="반환_값">반환 값</h3> + +<p>속성의 키와 값을 반복 가능한 객체에서 가져온 새로운 객체.</p> + +<h2 id="설명">설명</h2> + +<p><code>Object.fromEntries()</code> 메서드는 키값 쌍 목록을 받고, 그 목록을 사용해 속성을 부여한 새로운 객체를 반환합니다. <code>iterable</code> 인자는 <code>@@iterator</code> 메서드를 구현하여 반복기 객체를 반환해야 하고, 그 반복기는 또 배열 형태의 객체로 요소 2개를 반환해야 합니다. 반환된 요소 중 첫 번째는 생성할 객체의 속성 키로, 두 번째는 속성 값으로 사용합니다.</p> + +<p><code>Object.fromEntries()</code>는{{jsxref("Object.entries()")}}의 역을 수행합니다.</p> + +<h2 id="예제">예제</h2> + +<h3 id="Map에서_Object로"><code>Map</code>에서 <code>Object</code>로</h3> + +<pre class="brush: js">const map = new Map([ ['foo', 'bar'], ['baz', 42] ]); +const obj = Object.fromEntries(map); +console.log(obj); // { foo: "bar", baz: 42 } +</pre> + +<h3 id="Array에서_Object로"><code>Array</code>에서 <code>Object</code>로</h3> + +<pre class="brush: js">const arr = [ ['0', 'a'], ['1', 'b'], ['2', 'c'] ]; +const obj = Object.fromEntries(arr); +console.log(obj); // { 0: "a", 1: "b", 2: "c" } +</pre> + +<h3 id="객체_변환">객체 변환</h3> + +<p><code>Object.fromEntries()</code>와 그 역인 {{jsxref("Object.entries()")}}, 그리고 <a href="/ko/docs/Web/JavaScript/Reference/Global_Objects/Array#메서드_2">배열 변형 메서드</a>를 통해 객체를 변환할 수 있습니다.</p> + +<pre class="brush: js">const object1 = { a: 1, b: 2, c: 3 }; + +const object2 = Object.fromEntries( + Object.entries(object1) + .map(([ key, val ]) => [ key, val * 2 ]) +); + +console.log(object2); +// { a: 2, b: 4, c: 6 }</pre> + +<h2 id="명세">명세</h2> + +<table class="standard-table"> + <thead> + <tr> + <th scope="col">Specification</th> + <th scope="col">Status</th> + </tr> + </thead> + <tbody> + <tr> + <td><a href="https://tc39.github.io/proposal-object-from-entries/">https://tc39.github.io/proposal-object-from-entries</a></td> + <td>Stage 3</td> + </tr> + </tbody> +</table> + +<h2 id="브라우저_호환성">브라우저 호환성</h2> + +<p>{{Compat("javascript.builtins.Object.fromEntries")}}</p> + +<h2 id="같이_보기">같이 보기</h2> + +<ul> + <li>{{jsxref("Object.entries()")}}</li> + <li>{{jsxref("Object.keys()")}}</li> + <li>{{jsxref("Object.values()")}}</li> + <li>{{jsxref("Map.prototype.entries()")}}</li> + <li>{{jsxref("Map.prototype.keys()")}}</li> + <li>{{jsxref("Map.prototype.values()")}}</li> +</ul> |
