From 218934fa2ed1c702a6d3923d2aa2cc6b43c48684 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:43:23 -0500 Subject: initial commit --- .../global_objects/array/@@iterator/index.html | 89 ++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 files/zh-tw/web/javascript/reference/global_objects/array/@@iterator/index.html (limited to 'files/zh-tw/web/javascript/reference/global_objects/array/@@iterator') diff --git a/files/zh-tw/web/javascript/reference/global_objects/array/@@iterator/index.html b/files/zh-tw/web/javascript/reference/global_objects/array/@@iterator/index.html new file mode 100644 index 0000000000..eb73724bef --- /dev/null +++ b/files/zh-tw/web/javascript/reference/global_objects/array/@@iterator/index.html @@ -0,0 +1,89 @@ +--- +title: 'Array.prototype[@@iterator]()' +slug: Web/JavaScript/Reference/Global_Objects/Array/@@iterator +tags: + - Array + - ECMAScript 2015 + - Iterator + - JavaScript + - Method + - Prototype + - Reference +translation_of: Web/JavaScript/Reference/Global_Objects/Array/@@iterator +--- +
{{JSRef}}
+ +

@@iterator 屬性的初始值與 {{jsxref("Array.prototype.values()", "values()")}} 屬性的初始值為相同的的函式物件。

+ +

語法

+ +
arr[Symbol.iterator]()
+ +

回傳值

+ +

陣列的迭代器(iterator)函式,預設與 {{jsxref("Array.prototype.values()", "values()")}} 函式相同。

+ +

範例

+ +

使用 for...of 迴圈進行迭代

+ +
var arr = ['w', 'y', 'k', 'o', 'p'];
+var eArr = arr[Symbol.iterator]();
+// your browser must support for..of loop
+// and let-scoped variables in for loops
+for (let letter of eArr) {
+  console.log(letter);
+}
+
+ +

另一種迭代方式

+ +
var arr = ['w', 'y', 'k', 'o', 'p'];
+var eArr = arr[Symbol.iterator]();
+console.log(eArr.next().value); // w
+console.log(eArr.next().value); // y
+console.log(eArr.next().value); // k
+console.log(eArr.next().value); // o
+console.log(eArr.next().value); // p
+
+ +

規範

+ + + + + + + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName('ES2015', '#sec-array.prototype-@@iterator', 'Array.prototype[@@iterator]()')}}{{Spec2('ES2015')}}Initial definition.
{{SpecName('ESDraft', '#sec-array.prototype-@@iterator', 'Array.prototype[@@iterator]()')}}{{Spec2('ESDraft')}} 
+ +

瀏覽器相容性

+ +
+ + +

{{Compat("javascript.builtins.Array.@@iterator")}}

+
+ +

參見

+ + -- cgit v1.2.3-54-g00ecf