{"id":4045,"date":"2020-09-21T23:16:38","date_gmt":"2020-09-21T17:46:38","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=4045"},"modified":"2020-09-21T23:17:14","modified_gmt":"2020-09-21T17:47:14","slug":"defer-arguments-evaluation-go","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/defer-arguments-evaluation-go\/","title":{"rendered":"Evaluation of defer arguments 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-1\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/golangbyexamples.com\/defer-arguments-evaluation-go\/#Overview\" title=\"Overview\">Overview<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/golangbyexamples.com\/defer-arguments-evaluation-go\/#Example\" title=\"Example\">Example<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/golangbyexamples.com\/defer-arguments-evaluation-go\/#Output\" title=\"Output\">Output<\/a><\/li><\/ul><\/nav><\/div>\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview\"><\/span><strong>Overview<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<p class=\"has-medium-font-size\"><strong>defer<\/strong> arguments are evaluated at the time defer statement is evaluated<\/p>\n\n\n\n<p class=\"has-medium-font-size\">Let&#8217;s see a program for that<\/p>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Example\"><\/span><strong>Example<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport \"fmt\"\n\nfunc main() {\n\tsample := \"abc\"\n\n\tdefer fmt.Printf(\"In defer sample is: %s\\n\", sample)\n\tsample = \"xyz\"\n}<\/code><\/pre>\n\n\n\n<h1 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Output\"><\/span><strong>Output<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">In defer sample is: abc<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\">In the above program when the defer statement was evaluated the value of the\u00a0<strong>sample<\/strong> variable was <strong>&#8220;abc&#8221;<\/strong>. In the defer function, we print the\u00a0 sample variable. After the defer statement we change the value of the\u00a0<strong>sample<\/strong> variable to <strong>&#8220;xyz&#8221;<\/strong>.\u00a0 But the program outputs <strong>&#8220;abc&#8221;<\/strong> instead of <strong>&#8220;xyz&#8221;<\/strong> because when the defer arguments were evaluated the value of the\u00a0 sample variable was <strong>&#8220;abc&#8221;<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents OverviewExampleOutput Overview defer arguments are evaluated at the time defer statement is evaluated Let&#8217;s see a program for that Example Output In the above program when the defer statement&#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":[3,4],"class_list":["post-4045","post","type-post","status-publish","format-standard","hentry","category-tech","tag-go","tag-golang"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - 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