{"id":821,"date":"2012-07-12T17:45:15","date_gmt":"2012-07-13T03:45:15","guid":{"rendered":"http:\/\/mymonkeydo.com\/?p=821"},"modified":"2012-07-12T17:45:15","modified_gmt":"2012-07-13T03:45:15","slug":"passing-parameters-to-settimeout-in-a-loop","status":"publish","type":"post","link":"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/","title":{"rendered":"Passing parameters to setTimeout in a loop"},"content":{"rendered":"<h2>Problem<\/h2>\n<p>I know to pass a parameter to a setTimeout function you would use javascript&#8217;s &#8220;closure&#8221; to get it to work:<\/p>\n<p>setTimeout(function(){alert(someParameter)}, 1000);<\/p>\n<p>However if you are setting someParameter in a loop, setTimeout will always alert the last value set to someParameter.<\/p>\n<p>&nbsp;<\/p>\n<h2>Solution<\/h2>\n<p>The solution is to set a scope around setTimeout like so:<\/p>\n<pre><code>var strings = [ \"hello\", \"world\" ]; var delay = 1000; for(var i=0;i&lt;strings.length;i++) { \u00a0 \u00a0 (function(s){ \u00a0 \u00a0 \u00a0 \u00a0 setTimeout( function(){alert(s);}, delay); \u00a0 \u00a0 })(strings[i]); \u00a0 \u00a0 delay += 1000; }<\/code><\/pre>\n<pre><\/pre>\n<pre>source: <a href=\"http:\/\/stackoverflow.com\/questions\/6425062\/passing-functions-to-settimeout-in-a-loop-always-the-last-value\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/stackoverflow.com\/questions\/6425062\/passing-functions-to-settimeout-in-a-loop-always-the-last-value<\/a><\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[2],"tags":[39],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Passing parameters to setTimeout in a loop - My Monkey Do<\/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:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Passing parameters to setTimeout in a loop - My Monkey Do\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/\" \/>\n<meta property=\"og:site_name\" content=\"My Monkey Do\" \/>\n<meta property=\"article:published_time\" content=\"2012-07-13T03:45:15+00:00\" \/>\n<meta name=\"author\" content=\"Webhead\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Webhead\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/\",\"url\":\"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/\",\"name\":\"Passing parameters to setTimeout in a loop - My Monkey Do\",\"isPartOf\":{\"@id\":\"https:\/\/mymonkeydo.com\/#website\"},\"datePublished\":\"2012-07-13T03:45:15+00:00\",\"dateModified\":\"2012-07-13T03:45:15+00:00\",\"author\":{\"@id\":\"https:\/\/mymonkeydo.com\/#\/schema\/person\/b16fc650a8c182faaac896bab099b829\"},\"breadcrumb\":{\"@id\":\"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/mymonkeydo.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Passing parameters to setTimeout in a loop\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/mymonkeydo.com\/#website\",\"url\":\"https:\/\/mymonkeydo.com\/\",\"name\":\"My Monkey Do\",\"description\":\"A Log of Coding Solutions\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/mymonkeydo.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/mymonkeydo.com\/#\/schema\/person\/b16fc650a8c182faaac896bab099b829\",\"name\":\"Webhead\",\"url\":\"https:\/\/mymonkeydo.com\/author\/corey\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Passing parameters to setTimeout in a loop - My Monkey Do","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:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/","og_locale":"en_US","og_type":"article","og_title":"Passing parameters to setTimeout in a loop - My Monkey Do","og_url":"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/","og_site_name":"My Monkey Do","article_published_time":"2012-07-13T03:45:15+00:00","author":"Webhead","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Webhead"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/","url":"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/","name":"Passing parameters to setTimeout in a loop - My Monkey Do","isPartOf":{"@id":"https:\/\/mymonkeydo.com\/#website"},"datePublished":"2012-07-13T03:45:15+00:00","dateModified":"2012-07-13T03:45:15+00:00","author":{"@id":"https:\/\/mymonkeydo.com\/#\/schema\/person\/b16fc650a8c182faaac896bab099b829"},"breadcrumb":{"@id":"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/mymonkeydo.com\/passing-parameters-to-settimeout-in-a-loop\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/mymonkeydo.com\/"},{"@type":"ListItem","position":2,"name":"Passing parameters to setTimeout in a loop"}]},{"@type":"WebSite","@id":"https:\/\/mymonkeydo.com\/#website","url":"https:\/\/mymonkeydo.com\/","name":"My Monkey Do","description":"A Log of Coding Solutions","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/mymonkeydo.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/mymonkeydo.com\/#\/schema\/person\/b16fc650a8c182faaac896bab099b829","name":"Webhead","url":"https:\/\/mymonkeydo.com\/author\/corey\/"}]}},"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/mymonkeydo.com\/wp-json\/wp\/v2\/posts\/821"}],"collection":[{"href":"https:\/\/mymonkeydo.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mymonkeydo.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mymonkeydo.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mymonkeydo.com\/wp-json\/wp\/v2\/comments?post=821"}],"version-history":[{"count":0,"href":"https:\/\/mymonkeydo.com\/wp-json\/wp\/v2\/posts\/821\/revisions"}],"wp:attachment":[{"href":"https:\/\/mymonkeydo.com\/wp-json\/wp\/v2\/media?parent=821"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mymonkeydo.com\/wp-json\/wp\/v2\/categories?post=821"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mymonkeydo.com\/wp-json\/wp\/v2\/tags?post=821"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}