{"id":1320,"date":"2021-05-17T20:15:00","date_gmt":"2021-05-17T14:45:00","guid":{"rendered":"https:\/\/www.codingbroz.com\/?p=1320"},"modified":"2021-06-20T17:47:21","modified_gmt":"2021-06-20T12:17:21","slug":"day-4-count-objects-javascript-solution","status":"publish","type":"post","link":"https:\/\/www.codingbroz.com\/day-4-count-objects-javascript-solution\/","title":{"rendered":"Day 4: Count Objects | 10 Days Of JavaScript | HackerRank Solution"},"content":{"rendered":"\n<p>Hello coders, today we are going to solve <strong>Day 4: Count Objects HackerRank Solution<\/strong> which is a part of <strong>10 Days of JavaScript<\/strong> Series.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"675\" src=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/day-4-count-objects-10-days-of-javascript-codingbroz.png\" alt=\"Day 4: Count Objects\" class=\"wp-image-1322\" srcset=\"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/day-4-count-objects-10-days-of-javascript-codingbroz.png 1200w, https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/day-4-count-objects-10-days-of-javascript-codingbroz-768x432.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\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-662e13b28f605\" 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-662e13b28f605\" 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\/day-4-count-objects-javascript-solution\/#Objective\" title=\"Objective\">Objective<\/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\/day-4-count-objects-javascript-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-3\" href=\"https:\/\/www.codingbroz.com\/day-4-count-objects-javascript-solution\/#Input_Format\" title=\"Input Format\">Input Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.codingbroz.com\/day-4-count-objects-javascript-solution\/#Constraints\" title=\"Constraints\">Constraints<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.codingbroz.com\/day-4-count-objects-javascript-solution\/#Output_Format\" title=\"Output Format\">Output Format<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.codingbroz.com\/day-4-count-objects-javascript-solution\/#Solution_%E2%80%93_Day_4_Count_Objects\" title=\"Solution &#8211; Day 4: Count Objects \">Solution &#8211; Day 4: Count Objects <\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Objective\"><\/span><strong>Objective<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In this challenge, we learn about iterating over objects.<\/p>\n\n\n\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>Complete the function in the editor. It has one parameter: an array,&nbsp;<strong><em>a<\/em><\/strong>, of objects. Each object in the array has two integer properties denoted by&nbsp;<strong><em>x<\/em><\/strong>&nbsp;and&nbsp;<em><strong>y<\/strong><\/em>. The function must return a count of all such objects&nbsp;<strong><em>o<\/em><\/strong>&nbsp;in array&nbsp;<strong><em>a<\/em><\/strong>&nbsp;that satisfy&nbsp;<strong><em>o<\/em>.<em>x<\/em> == <em>o<\/em>.<em>y<\/em><\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Input_Format\"><\/span><strong>Input Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The first line contains an integer denoting&nbsp;<strong><em>n<\/em><\/strong>.<br>Each of the&nbsp;<strong><em>n<\/em><\/strong>&nbsp;subsequent lines contains two space-separated integers describing the values of&nbsp;<strong><em>x<\/em><\/strong>&nbsp;and&nbsp;<strong><em>y<\/em><\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Constraints\"><\/span><strong>Constraints<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul><li><strong>5 &lt;= <em>n<\/em> &lt;= 10<\/strong><\/li><li><strong>1 &lt;= <em>x<\/em>, <em>y<\/em> &lt;= 100<\/strong><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Output_Format\"><\/span><strong>Output Format<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Return a count of the total number of objects&nbsp;<em><strong>o<\/strong><\/em>&nbsp;such that&nbsp;<strong><em>o<\/em>.<em>x<\/em> == <em>o<\/em>.<em>y<\/em><\/strong>. Locked stub code in the editor prints the returned value to STDOUT.<\/p>\n\n\n\n<p><strong>Sample Input 0<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>5\n1 1\n2 3\n3 3\n3 4\n4 5<\/code><\/pre>\n\n\n\n<p><strong>Sample Output 0<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>2<\/code><\/pre>\n\n\n\n<p><strong>Explanation 0<\/strong><\/p>\n\n\n\n<p>There are&nbsp;<strong><em>n<\/em> = 5<\/strong>&nbsp;objects in the&nbsp;<strong><em>objects<\/em><\/strong>&nbsp;array:<\/p>\n\n\n\n<ul><li><strong><em>objects0<\/em><\/strong> <strong>= {x: 1, y: 1}<\/strong><\/li><li><strong><em>objects1<\/em><\/strong> <strong>= {x: 2, y: 3}<\/strong><\/li><li><strong><em>objects2<\/em><\/strong> <strong>= {x: 3, y: 3}<\/strong><\/li><li><strong><em>objects3<\/em><\/strong> <strong>= {x: 3, y: 4}<\/strong><\/li><li><strong><em>objects4<\/em><\/strong> <strong>= {x: 4, y: 5}<\/strong><\/li><\/ul>\n\n\n\n<p>Because we have two objects&nbsp;<strong><em>o<\/em><\/strong>&nbsp;that satisfy <strong><em>o<\/em>.<em>x<\/em> == <em>o<\/em>.<em>y<\/em><\/strong>(i.e.,&nbsp;<strong><em>objects0<\/em><\/strong>&nbsp;and&nbsp;<strong><em>objects<\/em><\/strong><em><strong>2<\/strong><\/em>), we return&nbsp;<strong>2<\/strong>&nbsp;as our answer.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solution_%E2%80%93_Day_4_Count_Objects\"><\/span><strong>Solution &#8211; Day 4: Count Objects <\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"js\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">'use strict';\n\nprocess.stdin.resume();\nprocess.stdin.setEncoding('utf-8');\n\nlet inputString = '';\nlet currentLine = 0;\n\nprocess.stdin.on('data', inputStdin => {\n    inputString += inputStdin;\n});\n\nprocess.stdin.on('end', _ => {\n    inputString = inputString.trim().split('\\n').map(string => {\n        return string.trim();\n    });\n    \n    main();    \n});\n\nfunction readLine() {\n    return inputString[currentLine++];\n}\n\n\/*\n * Return a count of the total number of objects 'o' satisfying o.x == o.y.\n * \n * Parameter(s):\n * objects: an array of objects with integer properties 'x' and 'y'\n *\/\nfunction getCount(objects) {\n    var count = 0;\n    for (var index in objects){\n        if (objects[index].x == objects[index].y){\n            count++;\n        }\n    }\n    return count;\n}\n\n\n\nfunction main() {\n    const n = +(readLine());\n    let objects = [];\n    \n    for (let i = 0; i &lt; n; i++) {\n        const [a, b] = readLine().split(' ');\n        \n        objects.push({x: +(a), y: +(b)});\n    }\n    \n    console.log(getCount(objects));\n}<\/pre>\n\n\n\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\n<ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-5246141430412355\"\n     data-ad-slot=\"8798433565\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n\n\n\n<p><strong>Disclaimer:<\/strong> The above Problem <strong>(<a href=\"https:\/\/www.hackerrank.com\/challenges\/js10-count-objects\/problem\" target=\"_blank\" aria-label=\"Count Objects (opens in a new tab)\" rel=\"noreferrer noopener\" class=\"rank-math-link\">Count Objects<\/a>)<\/strong> is generated by <strong>Hacker Rank<\/strong> but the Solution is provided by <strong>CodingBroz<\/strong>. This tutorial is only for <strong>Educational<\/strong> and <strong>Learning<\/strong> Purpose.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hello coders, today we are going to solve Day 4: Count Objects HackerRank Solution which is a part of 10 Days of JavaScript Series.<\/p>\n","protected":false},"author":1,"featured_media":1322,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","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":"default","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":[9,150],"tags":[151,80,155,18],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.codingbroz.com\/wp-content\/uploads\/2021\/05\/day-4-count-objects-10-days-of-javascript-codingbroz.png","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/1320"}],"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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/comments?post=1320"}],"version-history":[{"count":3,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/1320\/revisions"}],"predecessor-version":[{"id":3407,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/posts\/1320\/revisions\/3407"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media\/1322"}],"wp:attachment":[{"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/media?parent=1320"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/categories?post=1320"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.codingbroz.com\/wp-json\/wp\/v2\/tags?post=1320"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}