From 7267c8c97a1e4d170a0a68e34bc0b3e029f465c7 Mon Sep 17 00:00:00 2001 From: MDN Date: Sat, 17 Jul 2021 00:35:32 +0000 Subject: [CRON] sync translated content --- .../reference/global_objects/map/keys/index.html | 79 ---------------------- 1 file changed, 79 deletions(-) delete mode 100644 files/zh-cn/web/javascript/reference/global_objects/map/keys/index.html (limited to 'files/zh-cn/web/javascript/reference/global_objects/map/keys') diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/keys/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/keys/index.html deleted file mode 100644 index 8ded2f526a..0000000000 --- a/files/zh-cn/web/javascript/reference/global_objects/map/keys/index.html +++ /dev/null @@ -1,79 +0,0 @@ ---- -title: Map.prototype.keys() -slug: Web/JavaScript/Reference/Global_Objects/Map/keys -translation_of: Web/JavaScript/Reference/Global_Objects/Map/keys -tags: - - ECMAScript 2015 - - Iterator - - JavaScript - - Map - - Method - - Prototype -browser-compat: javascript.builtins.Map.keys ---- -
{{JSRef}}
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keys() 返回一个引用的 Iterator 对象。它包含按照顺序插入 Map 对象中每个元素的key值。

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{{EmbedInteractiveExample("pages/js/map-prototype-keys.html")}}
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语法

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myMap.keys()
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返回值

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一个存在引用关系的 {{jsxref("Map")}} iterator 对象.

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例子

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使用 keys()

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var myMap = new Map();
-myMap.set("0", "foo");
-myMap.set(1, "bar");
-myMap.set({}, "baz");
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-var mapIter = myMap.keys();
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-console.log(mapIter.next().value); // "0"
-console.log(mapIter.next().value); // 1
-console.log(mapIter.next().value); // Object
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规范

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规范状态备注
{{SpecName('ES2015', '#sec-map.prototype.keys', 'Map.prototype.keys')}}{{Spec2('ES2015')}}Initial definition.
{{SpecName('ESDraft', '#sec-map.prototype.keys', 'Map.prototype.keys')}}{{Spec2('ESDraft')}}
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浏览器兼容性

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{{Compat("javascript.builtins.Map.keys")}}

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参见

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