{"id":8331,"date":"2021-04-22T15:59:29","date_gmt":"2021-04-22T15:59:29","guid":{"rendered":"https:\/\/prwatech.in\/blog\/?p=8331"},"modified":"2024-04-13T05:31:57","modified_gmt":"2024-04-13T05:31:57","slug":"scala-nested-classes","status":"publish","type":"post","link":"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/","title":{"rendered":"Scala &#8211; Nested Classes"},"content":{"rendered":"\r\n<h2><span data-sheets-root=\"1\" data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;Scala - Nested Classes&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:6145,&quot;3&quot;:{&quot;1&quot;:0,&quot;3&quot;:1},&quot;14&quot;:{&quot;1&quot;:3,&quot;3&quot;:1},&quot;15&quot;:&quot;Arial&quot;}\">Scala &#8211; Nested Classes<\/span><\/h2>\r\n<p>&nbsp;<\/p>\r\n<p>In <strong>Scala<\/strong>, nesting can be done just <a href=\"https:\/\/prwatech.in\/blog\/#\">about<\/a> anything <a href=\"http:\/\/scala-lang.org\">inside<\/a> anything. functions can be define inside other functions, and classes inside other classes. Here are some simple examples.<\/p>\r\n\r\n\r\n\r\n<p><strong>use case 1:<\/strong><\/p>\r\n\r\n\r\n\r\n<p>scala&gt; class eduprwa {<br \/>class Member(val name: String) {<br \/>val course = new ArrayBuffer[Member]<br \/>}<br \/>private val members = new ArrayBuffer[Member]<br \/><br \/>def join(name: String) = {<br \/>val m = new Member(name)<br \/>members += m<br \/><br \/>m<br \/>}<br \/>}<br \/>class eduprwa<\/p>\r\n\r\n\r\n\r\n<p>scala&gt; val BigData = new eduprwa<br \/>2scala&gt; val DataScience = new eduprwa<br \/>scala&gt; val Hadoop = new eduprwa<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"521\" height=\"387\" class=\"wp-image-8336\" src=\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-45.png\" alt=\"\" srcset=\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-45.png 521w, https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-45-300x223.png 300w\" sizes=\"auto, (max-width: 521px) 100vw, 521px\" \/><\/figure>\r\n\r\n\r\n\r\n<p><strong><em>\/\/In our eduprwa example, you can add a member within its own eduprwa, but not across networks<\/em>.<\/strong><\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"587\" height=\"267\" class=\"wp-image-8339\" src=\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-46.png\" alt=\"\" srcset=\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-46.png 587w, https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-46-300x136.png 300w\" sizes=\"auto, (max-width: 587px) 100vw, 587px\" \/><\/figure>\r\n\r\n\r\n\r\n<p><strong>use case 2:<\/strong><\/p>\r\n\r\n\r\n\r\n<p>scala&gt; import scala.collection.mutable.ArrayBuffer<\/p>\r\n\r\n\r\n\r\n<p>scala&gt; class prwatech{<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0class Member(val name: String){<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0val contacts = new ArrayBuffer[Member]<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0}<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0private val members = new ArrayBuffer[Member]<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0def join(name: String) = {<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0val m = new Member(name)<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0members +=m<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0m<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0}<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 \u00a0}<\/p>\r\n\r\n\r\n\r\n<p>Scala&gt;val a1 = new prwatech<\/p>\r\n\r\n\r\n\r\n<p>scala&gt; val b1 = new prwatech<\/p>\r\n\r\n\r\n\r\n<p>2scala&gt; val fruit = a1.join(&#8220;Fruit&#8221;)<\/p>\r\n\r\n\r\n\r\n<p>scala&gt; val wolf = a1.join(&#8220;Wolf&#8221;)<\/p>\r\n\r\n\r\n\r\n<p>3scala&gt; fruit.contacts += wolf<\/p>\r\n\r\n\r\n\r\n<p>scala&gt; val beer = b1.join(&#8220;Beer&#8221;)<\/p>\r\n\r\n\r\n\r\n<p>4scala&gt; a1.contacts += beer<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"563\" class=\"wp-image-8332\" src=\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-43.png\" alt=\"\" srcset=\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-43.png 600w, https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-43-300x282.png 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\r\n\r\n\r\n\r\n<p><strong>use case 3:<\/strong><\/p>\r\n\r\n\r\n\r\n<p>scala&gt; class Animal{<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 class Member(val name: String){<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 val contacts = new ArrayBuffer[Member]<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 }<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 private val members = new ArrayBuffer[Member]<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 def join(name: String) = {<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 val m = new Member(name)<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 members +=m<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 m<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 }<\/p>\r\n\r\n\r\n\r\n<p>\u00a0\u00a0\u00a0\u00a0 }<\/p>\r\n\r\n\r\n\r\n<p>scala&gt; val petanimal = new Animal<\/p>\r\n\r\n\r\n\r\n<p>2scala&gt; val wildanimal = new Animal<\/p>\r\n\r\n\r\n\r\n<p>scala&gt; val cat = petanimal.join(&#8220;Cat&#8221;)<\/p>\r\n\r\n\r\n\r\n<p>3scala&gt; val dog = petanimal.join(&#8220;Dog&#8221;)<\/p>\r\n\r\n\r\n\r\n<p>scala&gt; cat.contacts += dog<\/p>\r\n\r\n\r\n\r\n<p>4scala&gt; val lion = wildanimal.join(&#8220;Lion&#8221;)<\/p>\r\n\r\n\r\n\r\n<p>scala&gt; cat.contacts += lion<\/p>\r\n\r\n\r\n\r\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"561\" height=\"583\" class=\"wp-image-8333\" src=\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-44.png\" alt=\"\" srcset=\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-44.png 561w, https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-44-289x300.png 289w\" sizes=\"auto, (max-width: 561px) 100vw, 561px\" \/><\/figure>\r\n","protected":false},"excerpt":{"rendered":"<p>Scala &#8211; Nested Classes &nbsp; In Scala, nesting can be done just about anything inside anything. functions can be define inside other functions, and classes inside other classes. Here are some simple examples. use case 1: scala&gt; class eduprwa {class Member(val name: String) {val course = new ArrayBuffer[Member]}private val members = new ArrayBuffer[Member] def join(name: [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[565,1698],"tags":[1043,1039,1040,1041,1046,1042,1037,1044,1038,1045],"class_list":["post-8331","post","type-post","status-publish","format-standard","hentry","category-scala","category-scala-modules-scala","tag-nested-class-example-program","tag-nested-class-in-scala","tag-nested-class-scala","tag-nested-class-use-cases","tag-nested-classes","tag-nested-classes-in-scala","tag-scala-nested-class","tag-scala-nested-class-use-cases","tag-scala-nested-example","tag-scala-nested-use-cases"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Scala - Nested Classes - Prwatech<\/title>\n<meta name=\"description\" content=\"Master Scala Nested Classes - Dive deep with our expert instructors and comprehensive curriculum, enroll now.\" \/>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Scala - Nested Classes - Prwatech\" \/>\n<meta property=\"og:description\" content=\"Master Scala Nested Classes - Dive deep with our expert instructors and comprehensive curriculum, enroll now.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/\" \/>\n<meta property=\"og:site_name\" content=\"Prwatech\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prwatech.in\/\" \/>\n<meta property=\"article:published_time\" content=\"2021-04-22T15:59:29+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-13T05:31:57+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-45.png\" \/>\n<meta name=\"author\" content=\"Prwatech\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@Eduprwatech\" \/>\n<meta name=\"twitter:site\" content=\"@Eduprwatech\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Prwatech\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/\",\"url\":\"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/\",\"name\":\"Scala - Nested Classes - Prwatech\",\"isPartOf\":{\"@id\":\"https:\/\/prwatech.in\/blog\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-45.png\",\"datePublished\":\"2021-04-22T15:59:29+00:00\",\"dateModified\":\"2024-04-13T05:31:57+00:00\",\"author\":{\"@id\":\"https:\/\/prwatech.in\/blog\/#\/schema\/person\/db90baff7744090b2288bbc98fea87f3\"},\"description\":\"Master Scala Nested Classes - Dive deep with our expert instructors and comprehensive curriculum, enroll now.\",\"breadcrumb\":{\"@id\":\"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/#primaryimage\",\"url\":\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-45.png\",\"contentUrl\":\"https:\/\/prwatech.in\/blog\/wp-content\/uploads\/2021\/04\/image-45.png\",\"width\":521,\"height\":387},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/prwatech.in\/blog\/scala\/scala-modules-scala\/scala-nested-classes\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/prwatech.in\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Scala &#8211; 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