{"id":21311,"date":"2024-03-15T21:51:16","date_gmt":"2024-03-15T21:51:16","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-can-es6-achieve-pseudo-arrays-conversion-to-arrays\/"},"modified":"2024-03-21T20:10:57","modified_gmt":"2024-03-21T20:10:57","slug":"how-can-es6-achieve-pseudo-arrays-conversion-to-arrays","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-can-es6-achieve-pseudo-arrays-conversion-to-arrays\/","title":{"rendered":"How can ES6 achieve pseudo arrays conversion to arrays?"},"content":{"rendered":"<p>In ES6, you can use the Array.from() method to convert array-like objects (such as pseudo arrays) into actual arrays.<\/p>\n<p>Pseudo-arrays are objects that resemble arrays in some ways but lack the methods and properties of arrays. Common examples of pseudo-arrays include the arguments object and DOM NodeList object.<\/p>\n<p>Here is an example code using the Array.from() method to convert a pseudo array into an array:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-comment\">\/\/ \u4f2a\u6570\u7ec4<\/span>\r\n<span class=\"hljs-keyword\">var<\/span> arrayLike = {\r\n  <span class=\"hljs-number\">0<\/span>: <span class=\"hljs-string\">'a'<\/span>,\r\n  <span class=\"hljs-number\">1<\/span>: <span class=\"hljs-string\">'b'<\/span>,\r\n  <span class=\"hljs-number\">2<\/span>: <span class=\"hljs-string\">'c'<\/span>,\r\n  <span class=\"hljs-attr\">length<\/span>: <span class=\"hljs-number\">3<\/span>\r\n};\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5c06\u4f2a\u6570\u7ec4\u8f6c\u6362\u4e3a\u6570\u7ec4<\/span>\r\n<span class=\"hljs-keyword\">var<\/span> array = <span class=\"hljs-title class_\">Array<\/span>.<span class=\"hljs-title function_\">from<\/span>(arrayLike);\r\n\r\n<span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(array); <span class=\"hljs-comment\">\/\/ ['a', 'b', 'c']<\/span>\r\n<\/code><\/pre>\n<p>The Array.from() method takes an iterable object as a parameter and returns a new array. It loops through the iterable object and adds each element to the new array one by one.<\/p>\n<p>It should be noted that the Array.from() method can only convert objects with numerical keys and a length property. Therefore, before converting a pseudo-array into an array, make sure the pseudo-array object has the correct keys and length property.<\/p>\n<p>Additionally, if you want to convert a specific type of pseudo-array to an array, you can use the Array.from() method with the second parameter for mapping. For example, converting a DOM NodeList object to an array:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-comment\">\/\/ DOM NodeList\u5bf9\u8c61<\/span>\r\n<span class=\"hljs-keyword\">var<\/span> nodeList = <span class=\"hljs-variable language_\">document<\/span>.<span class=\"hljs-title function_\">querySelectorAll<\/span>(<span class=\"hljs-string\">'div'<\/span>);\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5c06DOM NodeList\u5bf9\u8c61\u8f6c\u6362\u4e3a\u6570\u7ec4<\/span>\r\n<span class=\"hljs-keyword\">var<\/span> array = <span class=\"hljs-title class_\">Array<\/span>.<span class=\"hljs-title function_\">from<\/span>(nodeList, <span class=\"hljs-function\"><span class=\"hljs-params\">element<\/span> =&gt;<\/span> element.<span class=\"hljs-property\">textContent<\/span>);\r\n\r\n<span class=\"hljs-variable language_\">console<\/span>.<span class=\"hljs-title function_\">log<\/span>(array); <span class=\"hljs-comment\">\/\/ \u5305\u542b\u4e86\u6bcf\u4e2adiv\u5143\u7d20\u7684\u6587\u672c\u5185\u5bb9\u7684\u6570\u7ec4<\/span>\r\n<\/code><\/pre>\n<p>In the example above, the second parameter of the Array.from() method is a mapping function that transforms each element into its text content and adds the results to a new array.<\/p>\n<p>In conclusion, the Array.from() method can easily convert array-like objects into arrays, and also allows for element mapping through the second parameter.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In ES6, you can use the Array.from() method to convert array-like objects (such as pseudo arrays) into actual arrays. Pseudo-arrays are objects that resemble arrays in some ways but lack the methods and properties of arrays. Common examples of pseudo-arrays include the arguments object and DOM NodeList object. Here is an example code using the [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-21311","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How can ES6 achieve pseudo arrays conversion to arrays? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-can-es6-achieve-pseudo-arrays-conversion-to-arrays\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How can ES6 achieve pseudo arrays conversion to arrays?\" \/>\n<meta property=\"og:description\" content=\"In ES6, you can use the Array.from() method to convert array-like objects (such as pseudo arrays) into actual arrays. Pseudo-arrays are objects that resemble arrays in some ways but lack the methods and properties of arrays. Common examples of pseudo-arrays include the arguments object and DOM NodeList object. Here is an example code using the [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-can-es6-achieve-pseudo-arrays-conversion-to-arrays\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-15T21:51:16+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-21T20:10:57+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin Taylor\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Taylor\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-es6-achieve-pseudo-arrays-conversion-to-arrays\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-es6-achieve-pseudo-arrays-conversion-to-arrays\/\"},\"author\":{\"name\":\"Benjamin Taylor\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/ac801fe9549a25960ce48aa2e0a691c9\"},\"headline\":\"How can ES6 achieve pseudo arrays conversion to arrays?\",\"datePublished\":\"2024-03-15T21:51:16+00:00\",\"dateModified\":\"2024-03-21T20:10:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-es6-achieve-pseudo-arrays-conversion-to-arrays\/\"},\"wordCount\":241,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-can-es6-achieve-pseudo-arrays-conversion-to-arrays\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-can-es6-achieve-pseudo-arrays-conversion-to-arrays\/\",\"name\":\"How can ES6 achieve pseudo arrays conversion to arrays? 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