{"id":6569,"date":"2022-06-25T23:05:00","date_gmt":"2022-06-25T17:35:00","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=6569"},"modified":"2022-06-19T22:03:21","modified_gmt":"2022-06-19T16:33:21","slug":"ruby-procs-hackerrank-solution","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/ruby-procs-hackerrank-solution\/","title":{"rendered":"Ruby Procs &#8211; HackerRank Solution"},"content":{"rendered":"\n<p>In this post, we will solve <strong>Ruby Procs HackerRank Solution<\/strong>. This problem <strong>(Ruby Procs)<\/strong> is a part of <strong>HackerRank Ruby<\/strong> series.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_65 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6635b33d2d405\" class=\"ez-toc-cssicon-toggle-label\"><label class=\"ez-toc-title\">Table of Contents<\/label>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0090ff;color:#0090ff\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0090ff;color:#0090ff\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6635b33d2d405\" checked \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.codingbroz.com\/ruby-procs-hackerrank-solution\/#Task\" title=\"Task\">Task<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.codingbroz.com\/ruby-procs-hackerrank-solution\/#Solution_%E2%80%93_Ruby_Procs_%E2%80%93_HackerRank_Solution\" title=\"Solution &#8211; Ruby Procs &#8211; HackerRank Solution\">Solution &#8211; Ruby Procs &#8211; HackerRank Solution<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Task\"><\/span><strong>Task<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Passing blocks is one way to pass functions as arguments to other functions.<\/p>\n\n\n\n<p>Blocks are one of the very few exceptions to the &#8220;everything is an object&#8221; rule in Ruby. Blocks are not objects, and they can&#8217;t be saved to variables.<\/p>\n\n\n\n<p><a href=\"http:\/\/ruby-doc.org\/core-2.2.0\/Proc.html\" target=\"_blank\" rel=\"noopener\"><strong>Proc<\/strong><\/a>&nbsp;objects are blocks of code that can be bound to a set of local variables. You can think of a&nbsp;<em>proc<\/em>&nbsp;object as a &#8220;saved&#8221; block.<\/p>\n\n\n\n<p>Procs are a great way of keeping your code&nbsp;<a href=\"https:\/\/en.wikipedia.org\/wiki\/Don%27t_repeat_yourself\" target=\"_blank\" rel=\"noopener\">DRY<\/a>. DRY stands for&nbsp;<em>Do not Repeat Yourself<\/em>.<\/p>\n\n\n\n<p><strong>Example:<\/strong><\/p>\n\n\n\n<p><sub><strong>CODE<\/strong><\/sub><\/p>\n\n\n\n<pre class=\"wp-block-code has-ast-global-color-5-color has-ast-global-color-8-background-color has-text-color has-background\"><code>def foo(a, b, my_proc)\r\n    my_proc.call(a, b)\r\nend\r\n\r\nadd = proc {|x, y| x + y}\r\n\r\nputs foo(15, 10, add)<\/code><\/pre>\n\n\n\n<p><strong>OUTPUT<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code has-ast-global-color-5-color has-ast-global-color-8-background-color has-text-color has-background\"><code>25<\/code><\/pre>\n\n\n\n<p>In this example, we have created the proc&nbsp;<em>add<\/em>, which adds two numbers.<br>The proc&nbsp;<em>add<\/em>&nbsp;is passed as a parameter to the method&nbsp;<em>foo<\/em>.<br>In the method&nbsp;<em>foo<\/em>,&nbsp;<code>my_proc.call(a, b)<\/code>&nbsp;executes the proc.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Task<\/strong><\/p>\n\n\n\n<p>You are given a partially complete code. Your task is to fill in the blanks (<code>______<\/code>).<\/p>\n\n\n\n<p>The\u00a0<em>square_of_sum<\/em>\u00a0method computes the sum of the elements in an input array and returns the square of the summed elements.<br><br><strong>For example<\/strong>:<\/p>\n\n\n\n<pre class=\"wp-block-code has-ast-global-color-5-color has-ast-global-color-8-background-color has-text-color has-background\"><code>Input array: &#91;1, 2, 3]\r\nOutput: 36<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_%E2%80%93_Ruby_Procs_%E2%80%93_HackerRank_Solution\"><\/span><strong>Solution &#8211; Ruby Procs &#8211; HackerRank Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"ruby\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">def square_of_sum (my_array, proc_square, proc_sum)\n  sum = proc_sum.call(my_array)\n  proc_square.call(sum)\nend\n\nproc_square_number = proc {|x| x**2}\nproc_sum_array     = proc { |my_array| my_array.sum }\nmy_array = gets.split().map(&amp;:to_i)\n\nputs square_of_sum(my_array, proc_square_number, proc_sum_array)\n<\/pre>\n\n\n\n<p><strong>Note:<\/strong> This problem <strong>(<a href=\"https:\/\/www.hackerrank.com\/challenges\/ruby-procs\/problem?h_r=next-challenge&amp;h_v=zen\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Ruby Procs<\/a>)<\/strong> is generated by <strong><a href=\"https:\/\/www.hackerrank.com\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">HackerRank<\/a><\/strong> but the solution is provided by <strong><a href=\"https:\/\/www.codingbroz.com\/\">CodingBroz<\/a><\/strong>. This tutorial is only for <strong>Educational<\/strong> and <strong>Learning<\/strong> purpose.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this post, we will solve Ruby Procs HackerRank Solution. This problem (Ruby Procs) is a part of HackerRank Ruby series.<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[9,680],"tags":[681],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/6569"}],"collection":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/comments?post=6569"}],"version-history":[{"count":3,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/6569\/revisions"}],"predecessor-version":[{"id":6572,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/6569\/revisions\/6572"}],"wp:attachment":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media?parent=6569"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/categories?post=6569"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/tags?post=6569"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}