{"id":6546,"date":"2022-09-03T22:16:06","date_gmt":"2022-09-03T16:46:06","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-javascript-array-of-object-to-tree-structure\/"},"modified":"2022-09-03T22:16:06","modified_gmt":"2022-09-03T16:46:06","slug":"solved-javascript-array-of-object-to-tree-structure","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-javascript-array-of-object-to-tree-structure\/","title":{"rendered":"[Solved] Javascript array of object to tree structure"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-58391711\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"58391711\" data-parentid=\"58391221\" data-score=\"1\" 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>something along the lines <\/p>\n<\/p>\n<div class=\"snippet\" data-lang=\"js\" data-hide=\"false\" data-console=\"true\" data-babel=\"false\">\n<div class=\"snippet-code\">\n<pre class=\"snippet-code-js lang-js prettyprint-override\"><code>var obj_1 = {id:1, text:\"Title 1\", checked: false, unitId:0, line: 0};\r\nvar obj_2 = {id:2, text:\"Title 1.1\", checked: false, unitId:1, line: 0};\r\nvar obj_3 = {id:3, text:\"Title 1.2\", checked: false, unitId:1, line: 1};\r\nvar obj_4 = {id:4, text:\"Title 1.1.1\", checked: false, unitId:0, line: 1};\r\nvar obj_5 = {id:5, text:\"Title 2\", checked: false, unitId:0, line: 1};\r\n\r\nvar obj_list = [obj_1,obj_2,obj_3,obj_4,obj_5];\r\nlet result = obj_list.reduce((acc,o)=&gt;{\r\n    let unitId = o.unitId;\r\n    let cur = acc[unitId];\r\n    if(!cur){\r\n        cur = {checked:false, text: `Unit ${unitId + 1}`, children:[]};\r\n        acc[unitId] = cur;\r\n    }\r\n    cur.children.push(o);\r\n    return acc;\r\n},{});\r\nresult = Object.values(result).map(v=&gt;{\r\n    let dic = v.children.reduce((acc, o)=&gt;{\r\n        let lineId = o.line;\r\n        let cur = acc[lineId];\r\n        if(!cur){\r\n            cur = {checked:false, text: `Line ${String.fromCharCode(lineId+65)}`, children:[]};\r\n            acc[lineId] = cur;\r\n        }\r\n        cur.children.push(o);\r\n        return acc;\r\n    },{})\r\n    v.children = Object.values(dic);\r\n    return v;\r\n})\r\n\r\nresult = {text:'Main Root', checked:false, children:result}\r\nconsole.log(JSON.stringify(result,null,2))<\/code><\/pre>\n<\/div>\n<\/div><\/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 Javascript array of object to tree structure <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] something along the lines var obj_1 = {id:1, text:&#8221;Title 1&#8243;, checked: false, unitId:0, line: 0}; var obj_2 = {id:2, text:&#8221;Title 1.1&#8243;, checked: false, unitId:1, line: 0}; var obj_3 = {id:3, text:&#8221;Title 1.2&#8243;, checked: false, unitId:1, line: 1}; var obj_4 = {id:4, text:&#8221;Title 1.1.1&#8243;, checked: false, unitId:0, line: 1}; var obj_5 = {id:5, text:&#8221;Title 2&#8243;, &#8230; <a title=\"[Solved] Javascript array of object to tree structure\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-javascript-array-of-object-to-tree-structure\/\" aria-label=\"More on [Solved] Javascript array of object to tree structure\">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":[333,356],"class_list":["post-6546","post","type-post","status-publish","format-standard","hentry","category-solved","tag-javascript","tag-json"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>[Solved] Javascript array of object to tree structure - 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-javascript-array-of-object-to-tree-structure\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Javascript array of object to tree structure - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] something along the lines var obj_1 = {id:1, text:&quot;Title 1&quot;, checked: false, unitId:0, line: 0}; var obj_2 = {id:2, text:&quot;Title 1.1&quot;, checked: false, unitId:1, line: 0}; var obj_3 = {id:3, text:&quot;Title 1.2&quot;, checked: false, unitId:1, line: 1}; var obj_4 = {id:4, text:&quot;Title 1.1.1&quot;, checked: false, unitId:0, line: 1}; var obj_5 = {id:5, text:&quot;Title 2&quot;, ... Read more\" \/>\n<meta property=\"og:url\" content=\"https:\/\/jassweb.com\/solved\/solved-javascript-array-of-object-to-tree-structure\/\" \/>\n<meta property=\"og:site_name\" content=\"JassWeb\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-03T16:46:06+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=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-javascript-array-of-object-to-tree-structure\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-javascript-array-of-object-to-tree-structure\\\/\"},\"author\":{\"name\":\"Kirat\",\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/#\\\/schema\\\/person\\\/65c9c7b7958150c0dc8371fa35dd7c31\"},\"headline\":\"[Solved] Javascript array of object to tree structure\",\"datePublished\":\"2022-09-03T16:46:06+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-javascript-array-of-object-to-tree-structure\\\/\"},\"wordCount\":22,\"publisher\":{\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/#organization\"},\"keywords\":[\"javascript\",\"json\"],\"articleSection\":[\"Solved\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-javascript-array-of-object-to-tree-structure\\\/\",\"url\":\"https:\\\/\\\/jassweb.com\\\/solved\\\/solved-javascript-array-of-object-to-tree-structure\\\/\",\"name\":\"[Solved] Javascript array of object to tree structure - 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