From 95aca4b4d8fa62815d4bd412fff1a364f842814a Mon Sep 17 00:00:00 2001 From: Ryan Johnson Date: Thu, 29 Apr 2021 16:16:42 -0700 Subject: remove retired locales (#699) --- .../reference/global_objects/array/keys/index.html | 74 ---------------------- 1 file changed, 74 deletions(-) delete mode 100644 files/it/web/javascript/reference/global_objects/array/keys/index.html (limited to 'files/it/web/javascript/reference/global_objects/array/keys') diff --git a/files/it/web/javascript/reference/global_objects/array/keys/index.html b/files/it/web/javascript/reference/global_objects/array/keys/index.html deleted file mode 100644 index 78212d221f..0000000000 --- a/files/it/web/javascript/reference/global_objects/array/keys/index.html +++ /dev/null @@ -1,74 +0,0 @@ ---- -title: Array.prototype.keys() -slug: Web/JavaScript/Reference/Global_Objects/Array/keys -translation_of: Web/JavaScript/Reference/Global_Objects/Array/keys ---- -
{{JSRef}}
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Il metodo keys() ritorna un nuovo oggetto Array Iterator contenente le chiavi di ogni indice dell'array.

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var arr = ['a', 'b', 'c'];
-var iterator = arr.keys();
-
-console.log(iterator.next()); // { value: 0, done: false }
-console.log(iterator.next()); // { value: 1, done: false }
-console.log(iterator.next()); // { value: 2, done: false }
-console.log(iterator.next()); // { value: undefined, done: true }
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Sintassi

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arr.keys()
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Valore di ritorno

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Un nuovo oggetto {{jsxref("Array")}}.

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Esempi

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I Key iterator non ignorano gli elementi vuoti

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var arr = ['a', , 'c'];
-var sparseKeys = Object.keys(arr);
-var denseKeys = [...arr.keys()];
-console.log(sparseKeys); // ['0', '2']
-console.log(denseKeys);  // [0, 1, 2]
-
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Specifiche

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SpecificaStatoCommenti
{{SpecName('ES2015', '#sec-array.prototype.keys', 'Array.prototype.keys')}}{{Spec2('ES2015')}}Initial definition.
{{SpecName('ESDraft', '#sec-array.prototype.keys', 'Array.prototype.keys')}}{{Spec2('ESDraft')}} 
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Browser compatibility

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

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Vedi anche

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