{"id":31947,"date":"2023-01-25T18:21:37","date_gmt":"2023-01-25T12:51:37","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/"},"modified":"2023-01-25T18:21:37","modified_gmt":"2023-01-25T12:51:37","slug":"solved-how-to-find-the-common-set-of-numbers-in-a-2d-array","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/","title":{"rendered":"[Solved] How to find the common set of numbers in a 2D array?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-34334634\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"34334634\" data-parentid=\"34326514\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Although this does not solve your issue directly, you can gather and count all sequences by assigning them as keys in a <code>Map<\/code>. After you do this, you can get the longest sequences and see which one has the highest frequency.<\/p>\n<h3>Output from Code Below<\/h3>\n<pre><code>Sequence   Frequency\n--------   ---------\n2          2\n5          3\n1,2        2\n3,4,5      3         \/\/ &lt;- Longest sequence, Highest frequency.\n4,5        3\n\nSequence   Frequency\n--------   ---------\n1          1\n2          1\n3          1\n4          3         \/\/ &lt;- Highest frequency, but not a sequence.\n2,3,4      1\n1,2        1\n1,2,3      1\n2,3        1\n3,4        2         \/\/ &lt;- Second highest frequency, is a sequence.\n<\/code><\/pre>\n<pre class=\"lang-java prettyprint-override\"><code>import java.util.HashMap;\nimport java.util.Iterator;\nimport java.util.Map;\nimport java.util.Map.Entry;\n\npublic class MatrixSequenceFrequency {\n    public static void main(String[] args) {\n        int[][] arr1 = new int[][] {\n            { 1, 2, 0, 0, 0 },\n            { 1, 2, 0, 0, 0 },\n            { 0, 0, 3, 4, 5 },\n            { 0, 0, 3, 4, 5 },\n            { 0, 0, 3, 4, 5 }\n        };\n\n        printSequences(findSequences(arr1));\n\n        int[][] arr2 = new int[][] {\n            { 1, 2, 3, 0 },\n            { 1, 2, 0, 4 },\n            { 1, 0, 3, 4 },\n            { 0, 2, 3, 4 }\n        };\n\n        printSequences(findSequences(arr2));\n    }\n\n    private static Map&lt;String, Integer&gt; findSequences(int[][] arr) {\n        Map&lt;String, Integer&gt; sequences = new HashMap&lt;String, Integer&gt;();\n\n        for (int i = 0; i &lt; arr.length; i++) {\n            indexSequences(arr[i], sequences);\n        }\n\n        return sequences;\n    }\n\n    private static void indexSequences(int[] arr, Map&lt;String, Integer&gt; sequences) {\n        StringBuffer buff = new StringBuffer();\n\n        for (int i = 0; i &lt; arr.length; i++) {\n            for (int j = i; j &lt; arr.length; j++) {\n                if (arr[j] != 0) {\n                    buff.append(arr[j]).append(',');\n                } else {\n                    break; \/\/ `0` breaks the sequence.\n                }\n            }\n\n            if (buff.length() &gt; 0) {\n                if (buff.charAt(buff.length() - 1) == ',') {\n                    buff.deleteCharAt(buff.length() - 1); \/\/ Remove extra comma.\n                }\n\n                Integer value = sequences.get(buff.toString());\n                sequences.put(buff.toString(), value == null ? 1 : value + 1);\n                buff.delete(0, buff.length()); \/\/ Clear Buffer\n            }\n        }\n    }\n\n    private static void printSequences(Map&lt;String, Integer&gt; sequences) {\n        String format = \"%-10s %s%n\";\n        System.out.printf(format, \"Sequence\", \"Frequency\");\n        System.out.printf(format, \"--------\", \"---------\");\n        for (Iterator&lt;Entry&lt;String, Integer&gt;&gt; it = sequences.entrySet().iterator(); it.hasNext();) {\n            Entry&lt;String, Integer&gt; entry = it.next();\n            System.out.printf(format, entry.getKey(), entry.getValue().toString());\n        }\n        System.out.println();\n    }\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved How to find the common set of numbers in a 2D array? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Although this does not solve your issue directly, you can gather and count all sequences by assigning them as keys in a Map. After you do this, you can get the longest sequences and see which one has the highest frequency. Output from Code Below Sequence Frequency &#8212;&#8212;&#8211; &#8212;&#8212;&#8212; 2 2 5 3 1,2 &#8230; <a title=\"[Solved] How to find the common set of numbers in a 2D array?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/\" aria-label=\"More on [Solved] How to find the common set of numbers in a 2D array?\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[361,323],"class_list":["post-31947","post","type-post","status-publish","format-standard","hentry","category-solved","tag-arrays","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] How to find the common set of numbers in a 2D array? - JassWeb<\/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:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to find the common set of numbers in a 2D array? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Although this does not solve your issue directly, you can gather and count all sequences by assigning them as keys in a Map. After you do this, you can get the longest sequences and see which one has the highest frequency. Output from Code Below Sequence Frequency -------- --------- 2 2 5 3 1,2 ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2023-01-25T12:51:37+00:00\" \/>\n<meta name=\"author\" content=\"Kirat\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kirat\" \/>\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\":\"Article\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\/\/jassweb.com\/solved\/#\/schema\/person\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] How to find the common set of numbers in a 2D array?\",\"datePublished\":\"2023-01-25T12:51:37+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/\"},\"wordCount\":72,\"publisher\":{\"@id\":\"https:\/\/jassweb.com\/solved\/#organization\"},\"keywords\":[\"arrays\",\"java\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/\",\"url\":\"https:\/\/jassweb.com\/solved\/solved-how-to-find-the-common-set-of-numbers-in-a-2d-array\/\",\"name\":\"[Solved] How to find the common set of numbers in a 2D array? 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