{"id":7141,"date":"2022-04-26T19:11:10","date_gmt":"2022-04-26T13:41:10","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=7141"},"modified":"2022-04-26T23:06:16","modified_gmt":"2022-04-26T17:36:16","slug":"longest-common-prefix-golang","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/longest-common-prefix-golang\/","title":{"rendered":"Longest Common Prefix in a set of strings in Go (Golang)"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_17 counter-hierarchy counter-decimal ez-toc-light-blue\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<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:\/\/golangbyexamples.com\/longest-common-prefix-golang\/#Overview\" title=\"Overview\">Overview<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/golangbyexamples.com\/longest-common-prefix-golang\/#Program\" title=\"Program\">Program<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"has-vivid-cyan-blue-color has-text-color has-large-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview\"><\/span><strong>Overview<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-medium-font-size\">An array of strings is given. The objective is to find the longest common prefix from that array of strings.\u00a0 It should output an empty string if there is no common prefix.<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Example 1<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">Input: [\"fan\", \"fat\", \"fame\"]\nOutput: \"fa\"<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">Example 2<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">Input: [\"bat\", \"van\", \"cat\"]\nOutput: \"\"<\/code><\/pre>\n\n\n\n<h2 class=\"has-vivid-cyan-blue-color has-text-color has-large-font-size wp-block-heading\"><span class=\"ez-toc-section\" id=\"Program\"><\/span><strong>Program<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"has-medium-font-size\">Below is the program for the same<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport \"fmt\"\n\nfunc longestCommonPrefix(strs []string) string {\n\tlenStrs := len(strs)\n\n\tif lenStrs == 0 {\n\t\treturn \"\"\n\t}\n\n\tfirstString := strs[0]\n\n\tlenFirstString := len(firstString)\n\n\tcommonPrefix := \"\"\n\tfor i := 0; i < lenFirstString; i++ {\n\t\tfirstStringChar := string(firstString[i])\n\t\tmatch := true\n\t\tfor j := 1; j < lenStrs; j++ {\n\t\t\tif (len(strs[j]) - 1) < i {\n\t\t\t\tmatch = false\n\t\t\t\tbreak\n\t\t\t}\n\n\t\t\tif string(strs[j][i]) != firstStringChar {\n\t\t\t\tmatch = false\n\t\t\t\tbreak\n\t\t\t}\n\n\t\t}\n\n\t\tif match {\n\t\t\tcommonPrefix += firstStringChar\n\t\t} else {\n\t\t\tbreak\n\t\t}\n\t}\n\n\treturn commonPrefix\n}\n\nfunc main() {\n\toutput := longestCommonPrefix([]string{\"fan\", \"fat\", \"fame\"})\n\tfmt.Println(output)\n\n\toutput = longestCommonPrefix([]string{\"bat\", \"van\", \"cat\"})\n\tfmt.Println(output)\n}<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Output:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">\"fa\"\n\"\"<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Note: <\/strong>Check out our Golang Advanced Tutorial. The tutorials in this series are elaborative and we have tried to cover all concepts with examples. This tutorial is for those who are looking to gain expertise and a solid understanding of golang - <a href=\"https:\/\/golangbyexamples.com\/golang-comprehensive-tutorial\/\">Golang Advance Tutorial<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\">Also if you are interested in understanding how all design patterns can be implemented in Golang. If yes, then this post is for you -<a href=\"https:\/\/golangbyexamples.com\/all-design-patterns-golang\/\">All Design Patterns Golang<\/a><\/p>\n\n\n\n<p class=\"has-medium-font-size\">Also, check out our system design tutorial series here - <a href=\"https:\/\/techbyexample.com\/system-design-questions\/\">System Design Tutorial Series<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents OverviewProgram Overview An array of strings is given. The objective is to find the longest common prefix from that array of strings.\u00a0 It should output an empty string if&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false},"categories":[1],"tags":[3],"class_list":["post-7141","post","type-post","status-publish","format-standard","hentry","category-tech","tag-go"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Longest Common Prefix in a set of strings in Go (Golang) - Welcome To Golang By Example<\/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:\/\/golangbyexamples.com\/longest-common-prefix-golang\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Longest Common Prefix in a set of strings in Go (Golang) - Welcome To Golang By Example\" \/>\n<meta property=\"og:description\" content=\"Table of Contents OverviewProgram Overview An array of strings is given. 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