{"id":7611,"date":"2016-01-22T17:40:24","date_gmt":"2016-01-22T17:40:24","guid":{"rendered":"https:\/\/dev.railscarma.com\/learning-the-fundamentals-of-nokogiri-gem\/"},"modified":"2022-08-30T09:02:48","modified_gmt":"2022-08-30T09:02:48","slug":"imparare-i-fondamenti-della-gemma-nokogiri","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/it\/blog\/articoli-tecnici\/imparare-i-fondamenti-della-gemma-nokogiri\/","title":{"rendered":"Imparare i fondamenti della gemma Nokogiri"},"content":{"rendered":"
\n\t\t\t\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t
\n\t\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

<\/p>\n

Il mondo gira sempre pi\u00f9 velocemente e questa accelerazione \u00e8 evidente in tutti gli aspetti della nostra vita. Soprattutto quando si tratta di aziende, il premio sta nella velocit\u00e0. In questa frenetica accelerazione, la volatilit\u00e0 \u00e8 l\u2019unica costante. Per stare al passo con il ritmo e stare al passo con una concorrenza sempre pi\u00f9 agguerrita, le aziende sono alla ricerca di modi per aumentare l\u2019efficienza e avere una maggiore velocit\u00e0 di immissione sul mercato. Questo spiega la frenesia dietro la popolarit\u00e0 di linguaggi di programmazione come Ruby on Rails. Ci\u00f2 che rende Ruby on Rails ancora pi\u00f9 sorprendente \u00e8 l'enorme numero di gemme di cui \u00e8 dotato. Immagina uno strumento e molto probabilmente lo hai nel tuo kit Ruby. Uno dei migliori gioielli per Ruby on Rails \u00e8 Nokogiri che \u00e8 una libreria per gestire documenti XML e HTML. L'uso pi\u00f9 comune di un parser come Nokogiri \u00e8 estrarre dati da documenti strutturati. Esempi:<\/p>\n

    \n
  • Un elenco di prezzi da un sito Web di confronto dei prezzi.<\/li>\n
  • Collegamenti ai risultati di ricerca da un motore di ricerca.<\/li>\n
  • Un elenco di risposte da un sito di domande e risposte.<\/li>\n<\/ul>\n

    Installazione:<\/strong><\/p>\n

    Sistema operativo X:<\/strong><\/p>\n

    Per installare libxml2 da macports:<\/p>\n

    \n

    $ porta sudo installa libxml2 libxslt<\/p>\n<\/blockquote>\n

    Quindi per installare nokogiri:<\/p>\n

    \n

    $ sudo gem installa nokogiri<\/p>\n<\/blockquote>\n

    Linux:<\/strong><\/p>\n

    Su Linux dobbiamo ancora installare libxml2. Il comando per installare libxml2 varier\u00e0 in base al gestore pacchetti e alla distribuzione Linux che stiamo utilizzando.<\/p>\n

    Su Fedora:<\/strong><\/p>\n

    \n

    $ sudo yum installa libxml2-devel libxslt-devel<\/p>\n

    La gemma $ installa nokogiri<\/p>\n<\/blockquote>\n

    Su Ubuntu:<\/strong><\/p>\n

    \n

    $ sudo apt-get install libxml2 libxml2-dev libxslt libxslt-dev<\/p>\n

    La gemma $ installa nokogiri<\/p>\n<\/blockquote>\n

    Iniziare con Nokogiri:<\/strong><\/p>\n

    Una volta installato Nokogiri possiamo iniziare a utilizzarlo. Nokogiri pu\u00f2 utilizzare selettori XPath o CSS3. La capacit\u00e0 di utilizzare selettori CSS lo rende davvero ottimo per estrarre dati da documenti HTML.<\/p>\n

    \n

    richiedono "rubygems"<\/p>\n

    richiedono 'nokogiri'<\/p>\n

    richiedono 'open-uri'<\/p>\n<\/blockquote>\n

    Oltre a richiedere la gemma nokogiri avremmo bisogno di open-uri in modo che il contenuto di un URL possa essere facilmente trovato. Creiamo quindi un nuovo documento HTML Nokogiri e gli passiamo il contenuto della pagina dei risultati di ricerca. Con quel documento Nokogiri possiamo poi utilizzare at_css, passando il selettore CSS \u201ctitle\u201d per recuperare il contenuto del elemento. Il metodo at_css restituir\u00e0 il primo elemento corrispondente e possiamo chiamare .text su quell'elemento per ottenere il suo contenuto testuale. Infine usiamo puts per stampare il testo.<\/html><\/p>\n<p><strong>Analisi di base:<\/strong><\/p>\n<p>Nokogiri ti consente di analizzare un documento HTML o XML utilizzando alcune strategie diverse:<\/p>\n<ul>\n<li>DOM<\/li>\n<li>SAX<\/li>\n<li>Lettore<\/li>\n<li>Tiro<\/li>\n<\/ul>\n<p>Ognuna di queste strategie presenta diversi vantaggi e svantaggi. L'interfaccia DOM \u00e8 la pi\u00f9 comune e generalmente considerata la pi\u00f9 semplice da usare.<\/p>\n<p>Ogni prodotto che \u00e8 l'ultimo articolo della riga ha una classe diversa:<\/p>\n<blockquote>\n<p><div class="”product" lastcol”><br><a href="\/it\/”\/product\/f05f\/”\/" class="”product_link”"><br><img<br>src="\/images\/dot_clear.gif"<br>title="Distruggi il sonno con questa potente dose di energia, in una bottiglia riutilizzabile per cartucce di fucile."<br>alt="Confezione da 3 colpi energetici Zombie Blast"<br>larghezza="125"<br>altezza = "125"<br>classe=\u201dpigro\u201d<br>data-original="http:\/\/a.tgcdn.net\/images\/products\/thumb\/largesquare\/f05f_zombie_blast_energy_shots.jpg"<br>\/><br><h4>Confezione da 3 colpi energetici Zombie Blast<\/h4><br><\/a><br><p>$9.99<\/p><br><\/div><\/p>\n<\/blockquote>\n<p>Ci\u00f2 significa che per ottenere il nome dei prodotti, diremmo:<\/p>\n<p><strong>Inglese: <\/strong>Partendo dalla radice del documento: cerca in ogni div che ha un nome di classe contenente la parola "prodotto". All'interno troverai un collegamento. In quel collegamento trovi il testo h4.<\/p>\n<p><strong>XPath:<\/strong> \/\/div[contiene(@class,'prodotto')]\/a\/h4<\/p>\n<p>L'operatore di uguaglianza XPath corrisponde solo a valori completi, in questo caso una stringa. XPath corrisponde solo a nomi di intere classi, quindi div[@class='product'] in XPath non funzionerebbe per ottenere l'ultima colonna come ci si potrebbe aspettare.<\/p>\n<p><strong>Riferimento:<\/strong><\/p>\n<p><a href=\"https:\/\/github.com\/sparklemotion\/nokogiri\" target=\"_blank\">https:\/\/github.com\/sparklemotion\/nokogiri<\/a><br><\/p>\n<p><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-7fc30299 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7fc30299\" data-element_type=\"section\" data-settings=\"{"background_background":"classic"}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-51885040\" data-id=\"51885040\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6ea8ff86 elementor-widget elementor-widget-heading\" data-id=\"6ea8ff86\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Iscriviti per gli ultimi aggiornamenti<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5ba6176f elementor-widget elementor-widget-shortcode\" data-id=\"5ba6176f\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\t\t\t\t\t<script type=\"text\/javascript\">\n\t\t\t\t\t\tvar gCaptchaSibWidget;\n var onloadSibCallbackInvisible = function () {\n\n var element = document.getElementsByClassName('sib-default-btn');\n var countInvisible = 0;\n var indexArray = [];\n jQuery('.sib-default-btn').each(function (index, el) {\n if ((jQuery(el).attr('id') == \"invisible\")) {\n indexArray[countInvisible] = index;\n countInvisible++\n }\n });\n\n jQuery('.invi-recaptcha').each(function (index, el) {\n grecaptcha.render(element[indexArray[index]], {\n 'sitekey': jQuery(el).attr('data-sitekey'),\n 'callback': sibVerifyCallback,\n });\n });\n };\n\t\t\t\t\t<\/script>\n\t\t\t\t\t <script src=\"https:\/\/www.google.com\/recaptcha\/api.js?onload=onloadSibCallbackInvisible&render=explicit\" async defer><\/script>\n\t\t\t\t\n\t\t\t<form id=\"sib_signup_form_1\" method=\"post\" class=\"sib_signup_form\" action=\"\">\n\t\t\t\t<div class=\"sib_loader\" style=\"display:none;\"><img\n\t\t\t\t\t\t\tsrc=\"https:\/\/www.railscarma.com\/wp-includes\/images\/spinner.gif\" alt=\"caricatore\"><\/div>\n\t\t\t\t<input type=\"hidden\" name=\"sib_form_action\" value=\"subscribe_form_submit\">\n\t\t\t\t<input type=\"hidden\" name=\"sib_form_id\" value=\"1\">\n <input type=\"hidden\" name=\"sib_form_alert_notice\" value=\"Please fill out this field\">\n <input type=\"hidden\" name=\"sib_form_invalid_email_notice\" value=\"Your email address is invalid\">\n <input type=\"hidden\" name=\"sib_security\" value=\"d7f7626ab9\">\n\t\t\t\t<div class=\"sib_signup_box_inside_1\">\n\t\t\t\t\t<div style=\"\/*display:none*\/\" class=\"sib_msg_disp\">\n\t\t\t\t\t<\/div>\n <div id=\"sib_captcha_invisible\" class=\"invi-recaptcha\" data-sitekey=\"6LdikOAaAAAAAJ6SWrrKVQrtw7TQpQAEnv0HS0G3\"><\/div>\n \t\t\t\t\t<p class=\"sib-email-area\">\r\n <label class=\"sib-email-area\"><\/label>\r\n <input type=\"email\" class=\"sib-email-area\" name=\"email\" required=\"required\" placeholder=\"Indirizzo e-mail\">\r\n<\/p>\r\n<p class=\"sib-NAME-area\">\r\n <label class=\"sib-NAME-area\"><\/label>\r\n <input type=\"text\" class=\"sib-NAME-area\" name=\"NAME\" placeholder=\"Nome\">\r\n<\/p>\r\n<p>\r\n <input type=\"submit\" id=\"invisible\" class=\"sib-default-btn\" value=\"sottoscrivi\">\r\n<\/p>\t\t\t\t<\/div>\n\t\t\t<input type=\"hidden\" name=\"trp-form-language\" value=\"it\"\/><\/form>\n\t\t\t<style>\n\t\t\t\tform#sib_signup_form_1 p.sib-alert-message {\n padding: 6px 12px;\n margin-bottom: 20px;\n border: 1px solid transparent;\n border-radius: 4px;\n -webkit-box-sizing: border-box;\n -moz-box-sizing: border-box;\n box-sizing: border-box;\n}\nform#sib_signup_form_1 p.sib-alert-message-error {\n background-color: #f2dede;\n border-color: #ebccd1;\n color: #a94442;\n}\nform#sib_signup_form_1 p.sib-alert-message-success {\n background-color: #dff0d8;\n border-color: #d6e9c6;\n color: #3c763d;\n}\nform#sib_signup_form_1 p.sib-alert-message-warning {\n background-color: #fcf8e3;\n border-color: #faebcc;\n color: #8a6d3b;\n}\n\t\t\t<\/style>\n\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t <div class=\"related-post slider\">\r\n <div class=\"headline\">Articoli correlati<\/div>\r\n <div class=\"post-list owl-carousel\">\r\n\r\n <div class=\"item\">\r\n <div class=\"thumb post_thumb\">\r\n <a title=\"Gemma Kaminari\" href=\"https:\/\/www.railscarma.com\/it\/blog\/articoli-tecnici\/gemma-di-kaminari\/?related_post_from=37277\">\r\n\r\n <img decoding=\"async\" width=\"800\" height=\"300\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2023\/04\/kaminari-gem.jpg\" class=\"attachment-full size-full wp-post-image\" alt=\"gemma di Kaminari\" srcset=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2023\/04\/kaminari-gem.jpg 800w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2023\/04\/kaminari-gem-300x113.jpg 300w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2023\/04\/kaminari-gem-768x288.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\r\n\r\n <\/a>\r\n <\/div>\r\n\r\n <a class=\"title post_title\" title=\"Gemma Kaminari\" href=\"https:\/\/www.railscarma.com\/it\/blog\/articoli-tecnici\/gemma-di-kaminari\/?related_post_from=37277\">\r\n Gemma Kaminari <\/a>\r\n\r\n <\/div>\r\n <div class=\"item\">\r\n <div class=\"thumb post_thumb\">\r\n <a title=\"Perch\u00e9 assumere sviluppatori Ruby on Rails nel 2026?\" href=\"https:\/\/www.railscarma.com\/it\/blog\/roro\/perche-assumere-sviluppatori-di-ruby-on-rails\/?related_post_from=30627\">\r\n\r\n <img decoding=\"async\" width=\"800\" height=\"300\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2019\/01\/why-to-hire-ruby-on-rails-developers-in-2022.jpg\" class=\"attachment-full size-full wp-post-image\" alt=\"perch\u00e9 assumere sviluppatori di Ruby on Rails nel 2022\" srcset=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2019\/01\/why-to-hire-ruby-on-rails-developers-in-2022.jpg 800w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2019\/01\/why-to-hire-ruby-on-rails-developers-in-2022-300x113.jpg 300w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2019\/01\/why-to-hire-ruby-on-rails-developers-in-2022-768x288.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\r\n\r\n <\/a>\r\n <\/div>\r\n\r\n <a class=\"title post_title\" title=\"Perch\u00e9 assumere sviluppatori Ruby on Rails nel 2026?\" href=\"https:\/\/www.railscarma.com\/it\/blog\/roro\/perche-assumere-sviluppatori-di-ruby-on-rails\/?related_post_from=30627\">\r\n Perch\u00e9 assumere sviluppatori Ruby on Rails nel 2026? <\/a>\r\n\r\n <\/div>\r\n <div class=\"item\">\r\n <div class=\"thumb post_thumb\">\r\n <a title=\"Importanza dell'architettura software nello sviluppo di software aziendale\" href=\"https:\/\/www.railscarma.com\/it\/blog\/roro\/importanza-dellarchitettura-software-nello-sviluppo-di-software-aziendale\/?related_post_from=36250\">\r\n\r\n <img decoding=\"async\" width=\"800\" height=\"300\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2022\/06\/Importance-of-Software-Architecture-in-enterprise-software-development.jpg\" class=\"attachment-full size-full wp-post-image\" alt=\"Importanza dell'architettura software nello sviluppo di software aziendale\" srcset=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2022\/06\/Importance-of-Software-Architecture-in-enterprise-software-development.jpg 800w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2022\/06\/Importance-of-Software-Architecture-in-enterprise-software-development-300x113.jpg 300w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2022\/06\/Importance-of-Software-Architecture-in-enterprise-software-development-768x288.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\r\n\r\n <\/a>\r\n <\/div>\r\n\r\n <a class=\"title post_title\" title=\"Importanza dell'architettura software nello sviluppo di software aziendale\" href=\"https:\/\/www.railscarma.com\/it\/blog\/roro\/importanza-dellarchitettura-software-nello-sviluppo-di-software-aziendale\/?related_post_from=36250\">\r\n Importanza dell'architettura software nello sviluppo di software aziendale <\/a>\r\n\r\n <\/div>\r\n <div class=\"item\">\r\n <div class=\"thumb post_thumb\">\r\n <a title=\"Ruby IDE: i migliori IDE per lo sviluppo di Ruby on Rails\" href=\"https:\/\/www.railscarma.com\/it\/blog\/roro\/ruby-ide-le-migliori-idee-per-lo-sviluppo-di-ruby-on-rails\/?related_post_from=36125\">\r\n\r\n <img decoding=\"async\" width=\"800\" height=\"300\" src=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2022\/01\/BEST-IDES-FOR-RUBY-ON-RAILS-DEVELOPMENT.jpg\" class=\"attachment-full size-full wp-post-image\" alt=\"LE MIGLIORI IDEE PER LO SVILUPPO DI RUBY ON RAILS\" srcset=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2022\/01\/BEST-IDES-FOR-RUBY-ON-RAILS-DEVELOPMENT.jpg 800w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2022\/01\/BEST-IDES-FOR-RUBY-ON-RAILS-DEVELOPMENT-300x113.jpg 300w, https:\/\/www.railscarma.com\/wp-content\/uploads\/2022\/01\/BEST-IDES-FOR-RUBY-ON-RAILS-DEVELOPMENT-768x288.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\r\n\r\n <\/a>\r\n <\/div>\r\n\r\n <a class=\"title post_title\" title=\"Ruby IDE: i migliori IDE per lo sviluppo di Ruby on Rails\" href=\"https:\/\/www.railscarma.com\/it\/blog\/roro\/ruby-ide-le-migliori-idee-per-lo-sviluppo-di-ruby-on-rails\/?related_post_from=36125\">\r\n Ruby IDE: i migliori IDE per lo sviluppo di Ruby on Rails <\/a>\r\n\r\n <\/div>\r\n \r\n <\/div>\r\n\r\n <script>\r\n <\/script>\r\n <style>\r\n .related-post {}\r\n\r\n .related-post .post-list {\r\n text-align: left;\r\n }\r\n\r\n .related-post .post-list .item {\r\n margin: 10px;\r\n padding: 10px;\r\n }\r\n\r\n .related-post .headline {\r\n font-size: 14px !important;\r\n color: #999999 !important;\r\n }\r\n\r\n .related-post .post-list .item .post_thumb {\r\n max-height: 220px;\r\n margin: 10px 0px;\r\n padding: 0px;\r\n display: block;\r\n }\r\n\r\n .related-post .post-list .item .post_title {\r\n font-size: 14px;\r\n color: #000000;\r\n margin: 10px 0px;\r\n padding: 0px;\r\n display: block;\r\n text-decoration: none;\r\n }\r\n\r\n .related-post .post-list .item .post_excerpt {\r\n font-size: 12px;\r\n color: #3f3f3f;\r\n margin: 10px 0px;\r\n padding: 0px;\r\n display: block;\r\n text-decoration: none;\r\n }\r\n\r\n .related-post .owl-dots .owl-dot {\r\n }\r\n\r\n <\/style>\r\n <script>\r\n jQuery(document).ready(function($) {\r\n $(\".related-post .post-list\").owlCarousel({\r\n items: 2,\r\n responsiveClass: true,\r\n responsive: {\r\n 0: {\r\n items: 1,\r\n },\r\n 768: {\r\n items: 2,\r\n },\r\n 1200: {\r\n items: 2,\r\n }\r\n },\r\n rewind: true,\r\n loop: true,\r\n center: false,\r\n autoplay: true,\r\n autoplayHoverPause: true,\r\n nav: true,\r\n navSpeed: 1000,\r\n navText: ['<i class=\"fas fa-chevron-left\"><\/i>', '<i class=\"fas fa-chevron-right\"><\/i>'],\r\n dots: false,\r\n dotsSpeed: 1200,\r\n rtl: false,\r\n \r\n });\r\n });\r\n <\/script>\r\n <\/div>","protected":false},"excerpt":{"rendered":"<p>The world is spinning faster and faster and this acceleration is evident in all facets of our lives. Especially when it comes to businesses, the premium is on the speed. In this frantic accelerated, volatility is the only constant. To keep up with the pace and in order to stay ahead of increasingly fierce competition, …<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.railscarma.com\/it\/blog\/ruby-regex-match-guide-with-examples\/\"> <span class=\"screen-reader-text\">Ruby Regex Match Guide (2026) with Examples<\/span> Leggi altro \"<\/a><\/p>","protected":false},"author":1,"featured_media":31964,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[384],"tags":[654,656],"class_list":["post-7611","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical-articles","tag-nokogiri","tag-nokogiri-gem"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Learning the Fundamentals of Nokogiri Gem - RailsCarma - Ruby on Rails Development Company specializing in Offshore Development<\/title>\n<meta name=\"description\" content=\"The world is spinning faster and faster and this acceleration is evident in all facets of our lives. Especially when it comes to businesses, the premium\" \/>\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.railscarma.com\/it\/blog\/articoli-tecnici\/imparare-i-fondamenti-della-gemma-nokogiri\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Learning the Fundamentals of Nokogiri Gem - RailsCarma - Ruby on Rails Development Company specializing in Offshore Development\" \/>\n<meta property=\"og:description\" content=\"The world is spinning faster and faster and this acceleration is evident in all facets of our lives. Especially when it comes to businesses, the premium\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.railscarma.com\/it\/blog\/articoli-tecnici\/imparare-i-fondamenti-della-gemma-nokogiri\/\" \/>\n<meta property=\"og:site_name\" content=\"RailsCarma - Ruby on Rails Development Company specializing in Offshore Development\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/RailsCarma\/\" \/>\n<meta property=\"article:published_time\" content=\"2016-01-22T17:40:24+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-08-30T09:02:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"300\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@railscarma\" \/>\n<meta name=\"twitter:site\" content=\"@railscarma\" \/>\n<meta name=\"twitter:label1\" content=\"Scritto da\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo di lettura stimato\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minuti\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\/\/www.railscarma.com\/#\/schema\/person\/5f2228a2dec7549056e709de6eb85d21\"},\"headline\":\"Learning the Fundamentals of Nokogiri Gem\",\"datePublished\":\"2016-01-22T17:40:24+00:00\",\"dateModified\":\"2022-08-30T09:02:48+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/\"},\"wordCount\":642,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.railscarma.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png\",\"keywords\":[\"nokogiri\",\"nokogiri gem\"],\"articleSection\":[\"Technical Articles\"],\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/\",\"url\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/\",\"name\":\"Learning the Fundamentals of Nokogiri Gem - RailsCarma - Ruby on Rails Development Company specializing in Offshore Development\",\"isPartOf\":{\"@id\":\"https:\/\/www.railscarma.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png\",\"datePublished\":\"2016-01-22T17:40:24+00:00\",\"dateModified\":\"2022-08-30T09:02:48+00:00\",\"description\":\"The world is spinning faster and faster and this acceleration is evident in all facets of our lives. Especially when it comes to businesses, the premium\",\"breadcrumb\":{\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#breadcrumb\"},\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#primaryimage\",\"url\":\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png\",\"contentUrl\":\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png\",\"width\":800,\"height\":300},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.railscarma.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Learning the Fundamentals of Nokogiri Gem\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.railscarma.com\/#website\",\"url\":\"https:\/\/www.railscarma.com\/\",\"name\":\"RailsCarma - Ruby on Rails Development Company specializing in Offshore Development\",\"description\":\"RailsCarma is a Ruby on Rails Development Company in Bangalore. We specialize in Offshore Ruby on Rails Development based out in USA and India. Hire experienced Ruby on Rails developers for the ultimate Web Experience.\",\"publisher\":{\"@id\":\"https:\/\/www.railscarma.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.railscarma.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"it-IT\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.railscarma.com\/#organization\",\"name\":\"RailsCarma\",\"url\":\"https:\/\/www.railscarma.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\/\/www.railscarma.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2020\/08\/railscarma_logo.png\",\"contentUrl\":\"https:\/\/www.railscarma.com\/wp-content\/uploads\/2020\/08\/railscarma_logo.png\",\"width\":200,\"height\":46,\"caption\":\"RailsCarma\"},\"image\":{\"@id\":\"https:\/\/www.railscarma.com\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/RailsCarma\/\",\"https:\/\/x.com\/railscarma\",\"https:\/\/www.linkedin.com\/company\/railscarma\/\",\"https:\/\/myspace.com\/railscarma\",\"https:\/\/in.pinterest.com\/railscarma\/\",\"https:\/\/www.youtube.com\/channel\/UCx3Wil-aAnDARuatTEyMdpg\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.railscarma.com\/#\/schema\/person\/5f2228a2dec7549056e709de6eb85d21\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\/\/www.railscarma.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/308867ca6c81f3aba146080c601000087180326f752c4116849ea9f514c6a4fa?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/308867ca6c81f3aba146080c601000087180326f752c4116849ea9f514c6a4fa?s=96&d=mm&r=g\",\"caption\":\"admin\"},\"sameAs\":[\"https:\/\/www.railscarma.com\/hire-ruby-on-rails-developer\/\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Imparare i fondamenti di Nokogiri Gem - RailsCarma - Ruby on Rails Development Company specializzata nello sviluppo offshore","description":"Il mondo gira sempre pi\u00f9 velocemente e questa accelerazione \u00e8 evidente in tutti gli aspetti della nostra vita. Soprattutto quando si tratta di imprese, il premio","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.railscarma.com\/it\/blog\/articoli-tecnici\/imparare-i-fondamenti-della-gemma-nokogiri\/","og_locale":"it_IT","og_type":"article","og_title":"Learning the Fundamentals of Nokogiri Gem - RailsCarma - Ruby on Rails Development Company specializing in Offshore Development","og_description":"The world is spinning faster and faster and this acceleration is evident in all facets of our lives. Especially when it comes to businesses, the premium","og_url":"https:\/\/www.railscarma.com\/it\/blog\/articoli-tecnici\/imparare-i-fondamenti-della-gemma-nokogiri\/","og_site_name":"RailsCarma - Ruby on Rails Development Company specializing in Offshore Development","article_publisher":"https:\/\/www.facebook.com\/RailsCarma\/","article_published_time":"2016-01-22T17:40:24+00:00","article_modified_time":"2022-08-30T09:02:48+00:00","og_image":[{"width":800,"height":300,"url":"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png","type":"image\/png"}],"author":"admin","twitter_card":"summary_large_image","twitter_creator":"@railscarma","twitter_site":"@railscarma","twitter_misc":{"Scritto da":"admin","Tempo di lettura stimato":"3 minuti"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#article","isPartOf":{"@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/"},"author":{"name":"admin","@id":"https:\/\/www.railscarma.com\/#\/schema\/person\/5f2228a2dec7549056e709de6eb85d21"},"headline":"Learning the Fundamentals of Nokogiri Gem","datePublished":"2016-01-22T17:40:24+00:00","dateModified":"2022-08-30T09:02:48+00:00","mainEntityOfPage":{"@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/"},"wordCount":642,"commentCount":0,"publisher":{"@id":"https:\/\/www.railscarma.com\/#organization"},"image":{"@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#primaryimage"},"thumbnailUrl":"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png","keywords":["nokogiri","nokogiri gem"],"articleSection":["Technical Articles"],"inLanguage":"it-IT","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/","url":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/","name":"Imparare i fondamenti di Nokogiri Gem - RailsCarma - Ruby on Rails Development Company specializzata nello sviluppo offshore","isPartOf":{"@id":"https:\/\/www.railscarma.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#primaryimage"},"image":{"@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#primaryimage"},"thumbnailUrl":"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png","datePublished":"2016-01-22T17:40:24+00:00","dateModified":"2022-08-30T09:02:48+00:00","description":"Il mondo gira sempre pi\u00f9 velocemente e questa accelerazione \u00e8 evidente in tutti gli aspetti della nostra vita. Soprattutto quando si tratta di imprese, il premio","breadcrumb":{"@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#breadcrumb"},"inLanguage":"it-IT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/"]}]},{"@type":"ImageObject","inLanguage":"it-IT","@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#primaryimage","url":"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png","contentUrl":"https:\/\/www.railscarma.com\/wp-content\/uploads\/2016\/01\/nokogiri.png","width":800,"height":300},{"@type":"BreadcrumbList","@id":"https:\/\/www.railscarma.com\/de\/blog\/technical-articles\/erlernen-der-grundlagen-von-nokogiri-gem\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.railscarma.com\/"},{"@type":"ListItem","position":2,"name":"Learning the Fundamentals of Nokogiri Gem"}]},{"@type":"WebSite","@id":"https:\/\/www.railscarma.com\/#website","url":"https:\/\/www.railscarma.com\/","name":"RailsCarma - Societ\u00e0 di sviluppo Ruby on Rails specializzata nello sviluppo offshore","description":"RailsCarma \u00e8 una societ\u00e0 di sviluppo Ruby on Rails a Bangalore. Siamo specializzati nello sviluppo offshore di Ruby on Rails con sede negli Stati Uniti e in India. Assumi sviluppatori esperti di Ruby on Rails per la migliore esperienza Web.","publisher":{"@id":"https:\/\/www.railscarma.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.railscarma.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"it-IT"},{"@type":"Organization","@id":"https:\/\/www.railscarma.com\/#organization","name":"RailsCarma","url":"https:\/\/www.railscarma.com\/","logo":{"@type":"ImageObject","inLanguage":"it-IT","@id":"https:\/\/www.railscarma.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.railscarma.com\/wp-content\/uploads\/2020\/08\/railscarma_logo.png","contentUrl":"https:\/\/www.railscarma.com\/wp-content\/uploads\/2020\/08\/railscarma_logo.png","width":200,"height":46,"caption":"RailsCarma"},"image":{"@id":"https:\/\/www.railscarma.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/RailsCarma\/","https:\/\/x.com\/railscarma","https:\/\/www.linkedin.com\/company\/railscarma\/","https:\/\/myspace.com\/railscarma","https:\/\/in.pinterest.com\/railscarma\/","https:\/\/www.youtube.com\/channel\/UCx3Wil-aAnDARuatTEyMdpg"]},{"@type":"Person","@id":"https:\/\/www.railscarma.com\/#\/schema\/person\/5f2228a2dec7549056e709de6eb85d21","name":"amministratore","image":{"@type":"ImageObject","inLanguage":"it-IT","@id":"https:\/\/www.railscarma.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/308867ca6c81f3aba146080c601000087180326f752c4116849ea9f514c6a4fa?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/308867ca6c81f3aba146080c601000087180326f752c4116849ea9f514c6a4fa?s=96&d=mm&r=g","caption":"admin"},"sameAs":["https:\/\/www.railscarma.com\/hire-ruby-on-rails-developer\/"]}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/posts\/7611","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/comments?post=7611"}],"version-history":[{"count":0,"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/posts\/7611\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/media\/31964"}],"wp:attachment":[{"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/media?parent=7611"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/categories?post=7611"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.railscarma.com\/it\/wp-json\/wp\/v2\/tags?post=7611"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}