{"id":20868,"date":"2022-11-11T04:39:36","date_gmt":"2022-11-10T23:09:36","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-run-something-once-in-a-javascript-recursive-function\/"},"modified":"2022-11-11T04:39:36","modified_gmt":"2022-11-10T23:09:36","slug":"solved-run-something-once-in-a-javascript-recursive-function","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-run-something-once-in-a-javascript-recursive-function\/","title":{"rendered":"[Solved] Run something once in a javascript recursive function"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-48043491\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"48043491\" data-parentid=\"48043471\" 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>It&#8217;s often helpful to wrap a function used to evaluate something recursively in an outer function to make the API cleaner:<\/p>\n<pre><code>function factorial(n) {\n  function compute(n) {\n    if (n === 0 || n === 1)\n      return 1;\n    return n * compute(n - 1);\n  }\n  return compute(n || 1);\n}\n<\/code><\/pre>\n<p>Now the <code>n || 1<\/code> initialization happens once, when the inner <code>compute()<\/code> function is invoked.<\/p>\n<p>Creating a wrapper like that is even more useful for some combinatorics algorithms (&#8220;find all combinations &#8230;&#8221; etc).<\/p>\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 Run something once in a javascript recursive function <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] It&#8217;s often helpful to wrap a function used to evaluate something recursively in an outer function to make the API cleaner: function factorial(n) { function compute(n) { if (n === 0 || n === 1) return 1; return n * compute(n &#8211; 1); } return compute(n || 1); } Now the n || 1 &#8230; <a title=\"[Solved] Run something once in a javascript recursive function\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-run-something-once-in-a-javascript-recursive-function\/\" aria-label=\"More on [Solved] Run something once in a javascript recursive function\">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":[333,494],"class_list":["post-20868","post","type-post","status-publish","format-standard","hentry","category-solved","tag-javascript","tag-recursion"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Run something once in a javascript recursive function - 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-run-something-once-in-a-javascript-recursive-function\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Run something once in a javascript recursive function - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] It&#8217;s often helpful to wrap a function used to evaluate something recursively in an outer function to make the API cleaner: function factorial(n) { function compute(n) { if (n === 0 || n === 1) return 1; return n * compute(n - 1); } return compute(n || 1); } Now the n || 1 ... 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