{"id":34400,"date":"2024-11-01T09:27:42","date_gmt":"2024-11-01T09:27:42","guid":{"rendered":"http:\/\/atmokpo.com\/w\/?p=34400"},"modified":"2024-11-01T11:41:25","modified_gmt":"2024-11-01T11:41:25","slug":"javascript-coding-test-course-preparing-for-resignation","status":"publish","type":"post","link":"https:\/\/atmokpo.com\/w\/34400\/","title":{"rendered":"JavaScript Coding Test Course, Preparing for Resignation"},"content":{"rendered":"<p><body><\/p>\n<p>To prepare for a resignation in a rational and effective manner, various skills and knowledge are required. In particular, proficiency in programming languages such as JavaScript plays a crucial role in preparing for coding tests. In this post, I will introduce an algorithm problem using JavaScript and explain the process of solving it in detail.<\/p>\n<h2>Problem Description<\/h2>\n<div class=\"problem-statement\">\n<p><strong>Problem: Sum of Two Numbers<\/strong><\/p>\n<p>Given an integer array <code>nums<\/code> and an integer <code>target<\/code>, return the indices of the two numbers in <code>nums<\/code> such that their sum equals <code>target<\/code>.<\/p>\n<p>It is assumed that there is exactly one solution for each input, and you may not use the same element twice. The returned value should be the indices of the two numbers.<\/p>\n<p><strong>Example Input:<\/strong><\/p>\n<pre><code>nums = [2, 7, 11, 15]<\/code><\/pre>\n<p><strong>target = 9<\/strong><\/p>\n<p><strong>Example Output:<\/strong><\/p>\n<pre><code>[0, 1]<\/code><\/pre>\n<p>This example shows that <code>nums[0] + nums[1] = 2 + 7 = 9<\/code>.<\/p>\n<\/div>\n<h2>Problem Solving Strategy<\/h2>\n<p>There are various methods to approach this problem. Here are some representative approaches:<\/p>\n<ul>\n<li><strong>My Approach:<\/strong> Using a double loop to compare two numbers<\/li>\n<li><strong>Approach using hashmap:<\/strong> Allows quick lookup when necessary<\/li>\n<\/ul>\n<h3>1. Approach Using Double Loop<\/h3>\n<p>The most intuitive way is to use a double loop to check all combinations of two numbers. We validate whether we reach the target sum by checking every combination of numbers. However, this method has a time complexity of O(n<sup>2<\/sup>), which can degrade performance.<\/p>\n<pre><code>function twoSum(nums, target) {\n    for (let i = 0; i &lt; nums.length; i++) {\n        for (let j = i + 1; j &lt; nums.length; j++) {\n            if (nums[i] + nums[j] === target) {\n                return [i, j];\n            }\n        }\n    }\n}\n\n\/\/ Example execution\nconst nums = [2, 7, 11, 15];\nconst target = 9;\nconsole.log(twoSum(nums, target)); \/\/ [0, 1]\n<\/code><\/pre>\n<h3>2. Approach Using Hashmap<\/h3>\n<p>A more efficient method is to use a hashmap. As we iterate through the numbers, we store each number&#8217;s value as a key and its index as a value. Then, we compute the required difference for each value and look up this difference in the hashmap, allowing us to solve the problem in linear time complexity O(n).<\/p>\n<pre><code>function twoSum(nums, target) {\n    const numMap = new Map();\n    \n    for (let i = 0; i &lt; nums.length; i++) {\n        const complement = target - nums[i];\n        if (numMap.has(complement)) {\n            return [numMap.get(complement), i];\n        }\n        numMap.set(nums[i], i);\n    }\n}\n\n\/\/ Example execution\nconst nums = [2, 7, 11, 15];\nconst target = 9;\nconsole.log(twoSum(nums, target)); \/\/ [0, 1]\n<\/code><\/pre>\n<h2>Time Complexity<\/h2>\n<p>The first method has a time complexity of O(n<sup>2<\/sup>), while the second method has a time complexity of O(n). Thus, the second method is much more efficient. The second method has a space complexity of O(n) as it makes use of an additional hashmap.<\/p>\n<h2>Conclusion<\/h2>\n<p>This problem allowed me to improve my coding skills in JavaScript and try various approaches. In particular, the problem-solving method utilizing a hashmap can be very useful in coding tests.<\/p>\n<p>As you prepare for resigning, you will need to prepare for coding tests. I hope to enhance my algorithm problem-solving abilities through repeated practice and increase my application skills in actual coding tests. Please look forward to the next post where I will tackle more complex problems!<\/p>\n<p><\/body><\/p>\n","protected":false},"excerpt":{"rendered":"<p>To prepare for a resignation in a rational and effective manner, various skills and knowledge are required. In particular, proficiency in programming languages such as JavaScript plays a crucial role in preparing for coding tests. In this post, I will introduce an algorithm problem using JavaScript and explain the process of solving it in detail. &hellip; <a href=\"https:\/\/atmokpo.com\/w\/34400\/\" class=\"more-link\">\ub354 \ubcf4\uae30<span class=\"screen-reader-text\"> &#8220;JavaScript Coding Test Course, Preparing for Resignation&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[141],"tags":[],"class_list":["post-34400","post","type-post","status-publish","format-standard","hentry","category-javascript-coding-test"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>JavaScript Coding Test Course, Preparing for Resignation - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8<\/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:\/\/atmokpo.com\/w\/34400\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JavaScript Coding Test Course, Preparing for Resignation - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\" \/>\n<meta property=\"og:description\" content=\"To prepare for a resignation in a rational and effective manner, various skills and knowledge are required. In particular, proficiency in programming languages such as JavaScript plays a crucial role in preparing for coding tests. In this post, I will introduce an algorithm problem using JavaScript and explain the process of solving it in detail. &hellip; \ub354 \ubcf4\uae30 &quot;JavaScript Coding Test Course, Preparing for Resignation&quot;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/atmokpo.com\/w\/34400\/\" \/>\n<meta property=\"og:site_name\" content=\"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\" \/>\n<meta property=\"article:published_time\" content=\"2024-11-01T09:27:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-11-01T11:41:25+00:00\" \/>\n<meta name=\"author\" content=\"root\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@bebubo4\" \/>\n<meta name=\"twitter:site\" content=\"@bebubo4\" \/>\n<meta name=\"twitter:label1\" content=\"\uae00\uc4f4\uc774\" \/>\n\t<meta name=\"twitter:data1\" content=\"root\" \/>\n\t<meta name=\"twitter:label2\" content=\"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04\" \/>\n\t<meta name=\"twitter:data2\" content=\"2\ubd84\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/atmokpo.com\/w\/34400\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/atmokpo.com\/w\/34400\/\"},\"author\":{\"name\":\"root\",\"@id\":\"https:\/\/atmokpo.com\/w\/#\/schema\/person\/91b6b3b138fbba0efb4ae64b1abd81d7\"},\"headline\":\"JavaScript Coding Test Course, Preparing for Resignation\",\"datePublished\":\"2024-11-01T09:27:42+00:00\",\"dateModified\":\"2024-11-01T11:41:25+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/atmokpo.com\/w\/34400\/\"},\"wordCount\":402,\"publisher\":{\"@id\":\"https:\/\/atmokpo.com\/w\/#organization\"},\"articleSection\":[\"Javascript Coding Test\"],\"inLanguage\":\"ko-KR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/atmokpo.com\/w\/34400\/\",\"url\":\"https:\/\/atmokpo.com\/w\/34400\/\",\"name\":\"JavaScript Coding Test Course, Preparing for Resignation - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\",\"isPartOf\":{\"@id\":\"https:\/\/atmokpo.com\/w\/#website\"},\"datePublished\":\"2024-11-01T09:27:42+00:00\",\"dateModified\":\"2024-11-01T11:41:25+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/atmokpo.com\/w\/34400\/#breadcrumb\"},\"inLanguage\":\"ko-KR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/atmokpo.com\/w\/34400\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/atmokpo.com\/w\/34400\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\ud648\",\"item\":\"https:\/\/atmokpo.com\/w\/en\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"JavaScript Coding Test Course, Preparing for Resignation\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/atmokpo.com\/w\/#website\",\"url\":\"https:\/\/atmokpo.com\/w\/\",\"name\":\"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/atmokpo.com\/w\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/atmokpo.com\/w\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ko-KR\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/atmokpo.com\/w\/#organization\",\"name\":\"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\",\"url\":\"https:\/\/atmokpo.com\/w\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\/\/atmokpo.com\/w\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/atmokpo.com\/w\/wp-content\/uploads\/2024\/11\/logo.png\",\"contentUrl\":\"https:\/\/atmokpo.com\/w\/wp-content\/uploads\/2024\/11\/logo.png\",\"width\":400,\"height\":400,\"caption\":\"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8\"},\"image\":{\"@id\":\"https:\/\/atmokpo.com\/w\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/x.com\/bebubo4\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/atmokpo.com\/w\/#\/schema\/person\/91b6b3b138fbba0efb4ae64b1abd81d7\",\"name\":\"root\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ko-KR\",\"@id\":\"https:\/\/atmokpo.com\/w\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/708197b41fc6435a7ce22d951b25d4a47e9e904270cb1f04682d4f025066f80c?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/708197b41fc6435a7ce22d951b25d4a47e9e904270cb1f04682d4f025066f80c?s=96&d=mm&r=g\",\"caption\":\"root\"},\"sameAs\":[\"http:\/\/atmokpo.com\/w\"],\"url\":\"https:\/\/atmokpo.com\/w\/author\/root\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"JavaScript Coding Test Course, Preparing for Resignation - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8","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:\/\/atmokpo.com\/w\/34400\/","og_locale":"ko_KR","og_type":"article","og_title":"JavaScript Coding Test Course, Preparing for Resignation - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8","og_description":"To prepare for a resignation in a rational and effective manner, various skills and knowledge are required. In particular, proficiency in programming languages such as JavaScript plays a crucial role in preparing for coding tests. In this post, I will introduce an algorithm problem using JavaScript and explain the process of solving it in detail. &hellip; \ub354 \ubcf4\uae30 \"JavaScript Coding Test Course, Preparing for Resignation\"","og_url":"https:\/\/atmokpo.com\/w\/34400\/","og_site_name":"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8","article_published_time":"2024-11-01T09:27:42+00:00","article_modified_time":"2024-11-01T11:41:25+00:00","author":"root","twitter_card":"summary_large_image","twitter_creator":"@bebubo4","twitter_site":"@bebubo4","twitter_misc":{"\uae00\uc4f4\uc774":"root","\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04":"2\ubd84"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/atmokpo.com\/w\/34400\/#article","isPartOf":{"@id":"https:\/\/atmokpo.com\/w\/34400\/"},"author":{"name":"root","@id":"https:\/\/atmokpo.com\/w\/#\/schema\/person\/91b6b3b138fbba0efb4ae64b1abd81d7"},"headline":"JavaScript Coding Test Course, Preparing for Resignation","datePublished":"2024-11-01T09:27:42+00:00","dateModified":"2024-11-01T11:41:25+00:00","mainEntityOfPage":{"@id":"https:\/\/atmokpo.com\/w\/34400\/"},"wordCount":402,"publisher":{"@id":"https:\/\/atmokpo.com\/w\/#organization"},"articleSection":["Javascript Coding Test"],"inLanguage":"ko-KR"},{"@type":"WebPage","@id":"https:\/\/atmokpo.com\/w\/34400\/","url":"https:\/\/atmokpo.com\/w\/34400\/","name":"JavaScript Coding Test Course, Preparing for Resignation - \ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8","isPartOf":{"@id":"https:\/\/atmokpo.com\/w\/#website"},"datePublished":"2024-11-01T09:27:42+00:00","dateModified":"2024-11-01T11:41:25+00:00","breadcrumb":{"@id":"https:\/\/atmokpo.com\/w\/34400\/#breadcrumb"},"inLanguage":"ko-KR","potentialAction":[{"@type":"ReadAction","target":["https:\/\/atmokpo.com\/w\/34400\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/atmokpo.com\/w\/34400\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\ud648","item":"https:\/\/atmokpo.com\/w\/en\/"},{"@type":"ListItem","position":2,"name":"JavaScript Coding Test Course, Preparing for Resignation"}]},{"@type":"WebSite","@id":"https:\/\/atmokpo.com\/w\/#website","url":"https:\/\/atmokpo.com\/w\/","name":"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8","description":"","publisher":{"@id":"https:\/\/atmokpo.com\/w\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/atmokpo.com\/w\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"ko-KR"},{"@type":"Organization","@id":"https:\/\/atmokpo.com\/w\/#organization","name":"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8","url":"https:\/\/atmokpo.com\/w\/","logo":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/atmokpo.com\/w\/#\/schema\/logo\/image\/","url":"https:\/\/atmokpo.com\/w\/wp-content\/uploads\/2024\/11\/logo.png","contentUrl":"https:\/\/atmokpo.com\/w\/wp-content\/uploads\/2024\/11\/logo.png","width":400,"height":400,"caption":"\ub77c\uc774\ube0c\uc2a4\ub9c8\ud2b8"},"image":{"@id":"https:\/\/atmokpo.com\/w\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/x.com\/bebubo4"]},{"@type":"Person","@id":"https:\/\/atmokpo.com\/w\/#\/schema\/person\/91b6b3b138fbba0efb4ae64b1abd81d7","name":"root","image":{"@type":"ImageObject","inLanguage":"ko-KR","@id":"https:\/\/atmokpo.com\/w\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/708197b41fc6435a7ce22d951b25d4a47e9e904270cb1f04682d4f025066f80c?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/708197b41fc6435a7ce22d951b25d4a47e9e904270cb1f04682d4f025066f80c?s=96&d=mm&r=g","caption":"root"},"sameAs":["http:\/\/atmokpo.com\/w"],"url":"https:\/\/atmokpo.com\/w\/author\/root\/"}]}},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/posts\/34400","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/comments?post=34400"}],"version-history":[{"count":1,"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/posts\/34400\/revisions"}],"predecessor-version":[{"id":34401,"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/posts\/34400\/revisions\/34401"}],"wp:attachment":[{"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/media?parent=34400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/categories?post=34400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/atmokpo.com\/w\/wp-json\/wp\/v2\/tags?post=34400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}