{"json_modified": "2016-10-05T03:54:18.086781", "uuid": "6bb3e9df-8582-420b-a33e-799c6a502a07", "title": "Iterators and generators", "url": "/en-US/docs/Web/JavaScript/Guide/Iterators_and_Generators", "tags": ["Guide", "Intermediate", "JavaScript"], "translations": [{"uuid": "3a61caf0-ed6e-4021-9d13-3bfa75152f07", "title": "Iteratoren und Generatoren", "url": "/de/docs/Web/JavaScript/Guide/Iteratoren_und_Generatoren", "tags": ["Guide", "Intermediate", "JavaScript"], "summary": "Processing each of the items in a collection is a very common operation. JavaScript provides a number of ways of iterating over a collection, from simple <code><a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for\" title=\"en/Core_JavaScript_1.5_Reference/Statements/for\">for</a></code> loops to <code><a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map\" title=\"en/Core_JavaScript_1.5_Reference/Global_Objects/Array/map\">map()</a></code>, <code><a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter\" title=\"en/Core_JavaScript_1.5_Reference/Global_Objects/Array/filter\">filter()</a></code> and <a href=\"/en-US/docs/Web/JavaScript/Reference/Operators/Array_comprehensions\" title=\"en/JavaScript/Guide/Predefined Core Objects#Array comprehensions\">array comprehensions</a>. Iterators and Generators bring the concept of iteration directly into the core language and provide a mechanism for customizing the behavior of <code><a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for...of\" title=\"en/Core_JavaScript_1.5_Reference/Statements/for...in\">for...of</a></code> loops.", "localization_tags": ["inprogress"], "locale": "de", "last_edit": "2015-04-22T04:20:34", "review_tags": []}, {"uuid": "41806dee-3f4e-4fce-b900-58ccc1df1c9b", "title": "Iterators and generators", "url": "/es/docs/Web/JavaScript/Guide/Iterators_and_Generators", "tags": ["Intermedio", "Gu\u00eda", "JavaScript"], "summary": "Procesar cada uno de los elementos en una colecci\u00f3n es un tipo de operaci\u00f3n muy com\u00fan. JavaScript proporciona diversas formas de iterar a trav\u00e9s de los elementos de una colecci\u00f3n, desde simples bucles <code><a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for\" title=\"en/Core_JavaScript_1.5_Reference/Statements/for\">for </a></code>hasta<code><a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for\" title=\"en/Core_JavaScript_1.5_Reference/Statements/for\"> </a></code> <code><a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map\" title=\"en/Core_JavaScript_1.5_Reference/Global_Objects/Array/map\">map()</a></code>, y\u00a0<code><a href=\"https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter\" title=\"en/Core_JavaScript_1.5_Reference/Global_Objects/Array/filter\">filter()</a></code>.<code><a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for\" title=\"en/Core_JavaScript_1.5_Reference/Statements/for\">\u00a0</a></code>Los iteradores y los generadores acercan el concepto de iteraci\u00f3n directamente al\u00a0n\u00facleo del lenguaje y proporcionan un mecanismo para personalizar el comportamiento de los bucles<code> <a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for...of\" title=\"en/Core_JavaScript_1.5_Reference/Statements/for...in\">for...of</a></code>.", "localization_tags": ["inprogress"], "locale": "es", "last_edit": "2016-08-08T21:56:36", "review_tags": []}, {"uuid": "b9259803-8805-41cf-b977-70d698101ff4", "title": "It\u00e9rateurs et g\u00e9n\u00e9rateurs", "url": "/fr/docs/Web/JavaScript/Guide/iterateurs_et_generateurs", "tags": ["Guide", "Intermediate", "JavaScript"], "summary": "Effectuer des traitements sur chacun des \u00e9l\u00e9ments d'une collection est une op\u00e9ration tr\u00e8s fr\u00e9quente. Il existe plusieurs outils natifs dans JavaScript pour parcourir une collection, les boucles <code><a href=\"/fr/docs/Web/JavaScript/Reference/Instructions/for\">for</a></code>, <code><a href=\"/fr/docs/Web/JavaScript/Reference/Objets_globaux/Array/map\">map()</a></code>, <code><a href=\"/fr/docs/Web/JavaScript/Reference/Objets_globaux/Array/filter\">filter()</a></code>. Les it\u00e9rateurs et les g\u00e9n\u00e9rateurs font de ce concept d'it\u00e9ration une fonctionnalit\u00e9 principale du langage et permettent d'adapter et de personnaliser le comportement des boucles <code><a href=\"/fr/docs/Web/JavaScript/Reference/Instructions/for...of\">for...of</a></code>.", "localization_tags": [], "locale": "fr", "last_edit": "2016-10-05T03:54:05", "review_tags": []}, {"uuid": "019b9773-568a-4517-aafc-5b9e58690666", "title": "\u30a4\u30c6\u30ec\u30fc\u30bf\u3068\u30b8\u30a7\u30cd\u30ec\u30fc\u30bf", "url": "/ja/docs/Web/JavaScript/Guide/Iterators_and_Generators", "tags": ["Guide", "JavaScript"], "summary": "\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3053\u3061\u3089\u3082\u3054\u89a7\u304f\u3060\u3055\u3044 :", "localization_tags": [], "locale": "ja", "last_edit": "2015-11-30T07:47:10", "review_tags": ["technical", "editorial"]}, {"uuid": "fdec308f-d573-4aec-926a-6d4c2835681a", "title": "\ubc18\ubcf5\uae30 \ubc0f \uc0dd\uc131\uae30", "url": "/ko/docs/Web/JavaScript/Guide/Iterators_and_Generators", "tags": ["Guide", "Intermediate", "JavaScript"], "summary": "\uceec\ub809\uc158 \ub0b4 \uac01 \ud56d\ubaa9 \ucc98\ub9ac\ub294 \ub9e4\uc6b0 \ud754\ud55c \uc5f0\uc0b0\uc785\ub2c8\ub2e4. JavaScript\ub294 \uac04\ub2e8\ud55c <a href=\"/ko/docs/Web/JavaScript/Reference/Statements/for\" title=\"3&#xAC1C;&#xC758; &#xC120;&#xD0DD;&#xC2DD;&#xC73C;&#xB85C; &#xAD6C;&#xC131;&#xB418;&#xC5B4;&#xC788;&#xB294; for&#xBB38;&#xC740; &#xB8E8;&#xD504;&#xB97C; &#xC0DD;&#xC131;&#xD558;&#xACE0;, &#xADF8; &#xC2DD; &#xC740; &#xAD04;&#xD638;&#xB85C; &#xBB36;&#xC5B4; &#xC138;&#xBBF8;&#xCF5C;&#xB860;&#xC73C;&#xB85C; &#xAD6C;&#xBD84;&#xB418;&#xC5B4; &#xC788;&#xB2E4;.&#xB8E8;&#xD504; &#xC548;&#xC5D0;&#xB294; &#xAD6C;&#xBB38;&#xB610;&#xB294; &#xC77C;&#xB828;&#xC758; &#xC2DD;&#xC774; &#xB4A4;&#xB530;&#xB974;&#xACE0; &#xC788;&#xB2E4;\"><code>for</code></a> \ub8e8\ud504\uc5d0\uc11c <a href=\"/ko/docs/Web/JavaScript/Reference/Global_Objects/Array/map\" title=\"map() &#xBA54;&#xC18C;&#xB4DC;&#xB294; &#xBC30;&#xC5F4; &#xB0B4;&#xC758; &#xBAA8;&#xB4E0; &#xC694;&#xC18C;&#xA0;&#xAC01;&#xAC01;&#xC5D0; &#xB300;&#xD558;&#xC5EC;&#xA0; &#xC81C;&#xACF5;&#xB41C; &#xD568;&#xC218;(callback)&#xB97C;&#xA0;&#xD638;&#xCD9C;&#xD558;&#xACE0;,&#xA0;&#xADF8; &#xACB0;&#xACFC;&#xB97C;&#xA0;&#xBAA8;&#xC544;&#xC11C;,&#xA0;&#xA0;&#xC0C8;&#xB85C;&#xC6B4;&#xA0;&#xBC30;&#xC5F4;&#xC744; &#xBC18;&#xD658;&#xD569;&#xB2C8;&#xB2E4;.\"><code>map()</code></a> \ubc0f <a href=\"/ko/docs/Web/JavaScript/Reference/Global_Objects/Array/filter\" title=\"filter()&#xA0;&#xBA54;&#xC11C;&#xB4DC;&#xB294; &#xC81C;&#xACF5;&#xB41C; &#xD568;&#xC218;&#xAC00; &#xAD6C;&#xD604;&#xD558;&#xB294; &#xD14C;&#xC2A4;&#xD2B8;&#xB97C; &#xD1B5;&#xACFC;&#xD55C; &#xBAA8;&#xB4E0; &#xC694;&#xC18C;&#xB85C; &#xC774;&#xB8E8;&#xC5B4;&#xC9C4; &#xC0C8;&#xB85C;&#xC6B4; &#xBC30;&#xC5F4;&#xC744; &#xC0DD;&#xC131;&#xD55C;&#xB2E4;.\"><code>filter()</code></a>\uc5d0 \uc774\ub974\uae30\uae4c\uc9c0, \uceec\ub809\uc158\uc744 \ubc18\ubcf5\ud558\ub294 \ub9ce\uc740 \ubc29\ubc95\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4. \ubc18\ubcf5\uae30(iterator) \ubc0f \uc0dd\uc131\uae30(generator)\ub294 \ubc18\ubcf5 \uac1c\ub150\uc744 \ud575\uc2ec \uc5b8\uc5b4 \ub0b4\ub85c \ubc14\ub85c \uac00\uc838\uc640 <a href=\"/ko/docs/Web/JavaScript/Reference/Statements/for...of\" title=\"for...of &#xBB38;(statement)&#xC740; &#xBC18;&#xBCF5;&#xAC00;&#xB2A5;&#xD55C; &#xAC1D;&#xCCB4; (Array, Map, Set, String, TypedArray, arguments &#xAC1D;&#xCCB4; &#xB4F1;&#xC744; &#xD3EC;&#xD568;)&#xC5D0; &#xB300;&#xD574;&#xC11C; &#xBC18;&#xBCF5;&#xD558;&#xACE0; &#xAC01; &#xAC1C;&#xBCC4; &#xC18D;&#xC131;&#xAC12;&#xC5D0; &#xB300;&#xD574; &#xC2E4;&#xD589;&#xB418;&#xB294; &#xBB38;&#xC774; &#xC788;&#xB294; &#xC0AC;&#xC6A9;&#xC790; &#xC815;&#xC758; &#xBC18;&#xBCF5; &#xD6C4;&#xD06C;&#xB97C; &#xD638;&#xCD9C;&#xD558;&#xB294; &#xB8E8;&#xD504;&#xB97C; &#xC0DD;&#xC131;&#xD569;&#xB2C8;&#xB2E4;.\"><code>for...of</code></a> \ub8e8\ud504\uc758 \ub3d9\uc791(behavior)\uc744 \uc0ac\uc6a9\uc790 \uc815\uc758\ud558\ub294 \uba54\ucee4\ub2c8\uc998\uc744 \uc81c\uacf5\ud569\ub2c8\ub2e4.", "localization_tags": [], "locale": "ko", "last_edit": "2016-07-20T07:29:22", "review_tags": []}, {"uuid": "8fc23c54-0860-41d4-a80e-afcf0c064912", "title": "Iteratores e geradores", "url": "/pt-BR/docs/Web/JavaScript/Guide/Iteratores_e_geradores", "tags": ["Intermediario", "Iteradores", "Guia", "Generators", "JavaScript"], "summary": "Processar cada item em uma cole\u00e7\u00e3o \u00e9 uma opera\u00e7\u00e3o muito comum, trivial. JavaScript disponibiliza uma s\u00e9rie de maneiras de iterar\u00a0sobre uma cole\u00e7\u00e3o, de um simples la\u00e7o <a href=\"/pt-BR/docs/Web/JavaScript/Reference/Statements/for\" title=\"A instru&#xE7;&#xE3;o for cria um loop que consiste em tr&#xEA;s express&#xF5;es opcionais, dentro de par&#xEA;nteses e separadas por ponto e v&#xED;rgula, seguidas por uma declara&#xE7;&#xE3;o ou uma sequ&#xEA;ncia de declara&#xE7;&#xF5;es executadas em sequ&#xEA;ncia.\"><code>for</code></a>, at\u00e9 um <a href=\"/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/Array/map\" title=\"O m&#xE9;todo map() invoca a fun&#xE7;&#xE3;o callback passada por argumento para cada elemento do Array e devolve um novo Array como resultado.\"><code>map()</code></a> e tamb\u00e9m com o <a href=\"/pt-BR/docs/Web/JavaScript/Reference/Global_Objects/Array/filter\" title=\"The documentation about this has not yet been written; please consider contributing!\"><code>filter()</code></a>. Iteradores e Geradores trazem o conceito\u00a0da\u00a0intera\u00e7\u00e3o ocorrer diretamente no n\u00facleo da linguagem e prover um mecanismo para a customiza\u00e7\u00e3o do comportamneto de la\u00e7os\u00a0<a href=\"/pt-BR/docs/Web/JavaScript/Reference/Statements/for...of\" title=\"O loop&#xA0;for...of&#xA0;percorre&#xA0;objetos iterativos&#xA0;(incluindo Array,&#xA0;Map, Set, objetos-argumentos&#xA0;e assim por diante), chamando uma fun&#xE7;&#xE3;o personalizada com instru&#xE7;&#xF5;es a serem executadas para o&#xA0;valor&#xA0;de cada objeto distinto.\"><code>for...of</code></a>.", "localization_tags": ["inprogress"], "locale": "pt-BR", "last_edit": "2016-07-28T07:20:27", "review_tags": []}, {"uuid": "80895706-ce57-4f10-8bf9-f0e0ae731feb", "title": "\u0418\u0442\u0435\u0440\u0430\u0442\u043e\u0440\u044b \u0438  \u0433\u0435\u043d\u0435\u0440\u0430\u0442\u043e\u0440\u044b", "url": "/ru/docs/Web/JavaScript/Guide/Iterators_and_Generators", "tags": [], "summary": "\u041e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u043a\u0430\u0436\u0434\u043e\u0433\u043e \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u0430 \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u0438 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432\u0435\u0441\u044c\u043c\u0430 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043d\u043e\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0435\u0439. JavaScript \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0441\u043f\u043e\u0441\u043e\u0431\u043e\u0432 \u043f\u0435\u0440\u0435\u0431\u043e\u0440\u0430 \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u0438, \u043e\u0442 \u043f\u0440\u043e\u0441\u0442\u043e\u0433\u043e \u0446\u0438\u043a\u043b\u0430\u00a0<code><a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for\" title=\"en/Core_JavaScript_1.5_Reference/Statements/for\">for</a></code>\u00a0\u0434\u043e\u00a0<code><a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map\" title=\"en/Core_JavaScript_1.5_Reference/Global_Objects/Array/map\">map()</a></code>, <code><a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter\" title=\"en/Core_JavaScript_1.5_Reference/Global_Objects/Array/filter\">filter()</a></code> \u0438 <a href=\"/en-US/docs/Web/JavaScript/Reference/Operators/Array_comprehensions\" title=\"en/JavaScript/Guide/Predefined Core Objects#Array comprehensions\">array comprehensions</a>. \u0418\u0442\u0435\u0440\u0430\u0442\u043e\u0440\u044b \u0438 \u0433\u0435\u043d\u0435\u0440\u0430\u0442\u043e\u0440\u044b \u0432\u043d\u0435\u0434\u0440\u044f\u044e\u0442 \u043a\u043e\u043d\u0446\u0435\u043f\u0446\u0438\u044e \u043f\u0435\u0440\u0435\u0431\u043e\u0440\u0430 \u043d\u0435\u043f\u043e\u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u0432 \u044f\u0434\u0440\u043e \u044f\u0437\u044b\u043a\u0430\u00a0\u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0442 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0438 \u043f\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u044f\u00a0<code><a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for...of\" title=\"en/Core_JavaScript_1.5_Reference/Statements/for...in\">for...of</a></code> \u0446\u0438\u043a\u043b\u043e\u0432.", "localization_tags": ["inprogress"], "locale": "ru", "last_edit": "2016-06-22T23:39:54", "review_tags": []}, {"uuid": "f20be39f-ad66-4195-b7ec-e2683625fb53", "title": "\u8fed\u4ee3\u5668\u548c\u751f\u6210\u5668", "url": "/zh-CN/docs/Web/JavaScript/Guide/Iterators_and_Generators", "tags": [], "summary": "\u5bf9\u96c6\u5408\u4e2d\u7684\u4efb\u610f\u9879\u8fdb\u884c\u5904\u7406\u662f\u5f88\u5e38\u89c1\u7684\u64cd\u4f5c\u3002JavaScript \u63d0\u4f9b\u4e86\u597d\u51e0\u79cd\u65b9\u6cd5\u6765\u904d\u5386\u4e00\u4e2a\u96c6\u5408\uff0c\u4ece\u7b80\u5355\u7684 <code><a href=\"/zh-CN/JavaScript/Reference/Statements/for\" title=\"zh-CN/Core_JavaScript_1.5_Reference/Statements/for\">for</a></code>\u00a0 \u5faa\u73af\u81f3 <code><a href=\"/zh-CN/JavaScript/Reference/Global_Objects/Array/map\" title=\"zh-CN/Core_JavaScript_1.5_Reference/Global_Objects/Array/map\">map()</a><font face=\"Open Sans, Arial, sans-serif\"><span style=\"font-weight: normal;\">\u548c</span></font></code><code><a href=\"/zh-CN/JavaScript/Reference/Global_Objects/Array/filter\" title=\"zh-CN/Core_JavaScript_1.5_Reference/Global_Objects/Array/filter\">filter()</a></code> \u3002\u00a0\u8fed\u4ee3\u5668\u548c\u751f\u6210\u5668\u5c06\u8fed\u4ee3\u7684\u6982\u5ff5\u7eb3\u5165\u7684javascritp\u7684\u6838\u5fc3\u8bed\u8a00\u4e2d\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e00\u79cd\u81ea\u5b9a\u4e49 <code><a href=\"/zh-CN/docs/\">for...of</a>\u00a0</code>\u5faa\u73af\u4f53\u7684\u673a\u5236 \u3002", "localization_tags": [], "locale": "zh-CN", "last_edit": "2016-08-04T20:17:56", "review_tags": []}], "modified": "2016-10-04T01:49:14", "label": "Iterators and generators", "localization_tags": [], "locale": "en-US", "id": 11741, "last_edit": "2016-10-04T01:49:04", "summary": "Processing each of the items in a collection is a very common operation. JavaScript provides a number of ways of iterating over a collection, from simple <a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for\" title=\"The for statement creates a loop that consists of three optional expressions, enclosed in parentheses and separated by semicolons, followed by a statement (usually a block statement) to be executed in the loop.\"><code>for</code></a> loops to <a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map\" title=\"The map() method creates a new array with the results of calling a provided function on every element in this array.\"><code>map()</code></a> and <a href=\"/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter\" title=\"The filter() method creates a new array with all elements that pass the test implemented by the provided function.\"><code>filter()</code></a>. Iterators and Generators bring the concept of iteration directly into the core language and provide a mechanism for customizing the behavior of <a href=\"/en-US/docs/Web/JavaScript/Reference/Statements/for...of\" title=\"The for...of statement creates a loop iterating over iterable objects (including Array, Map, Set, String, TypedArray, arguments object and so on), invoking a custom iteration hook with statements to be executed for the value of each distinct property.\"><code>for...of</code></a> loops.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Iterators", "title": "Iterators"}, {"id": "Generators", "title": "Generators"}, {"id": "Iterables", "title": "Iterables"}, {"id": "User-defined_iterables", "title": "User-defined iterables"}, {"id": "Built-in_iterables", "title": "Built-in iterables"}, {"id": "Syntaxes_expecting_iterables", "title": "Syntaxes expecting iterables"}, {"id": "Advanced_generators", "title": "Advanced generators"}], "slug": "Web/JavaScript/Guide/Iterators_and_Generators", "review_tags": []}