{"id":73,"date":"2019-03-18T16:38:18","date_gmt":"2019-03-18T16:38:18","guid":{"rendered":"https:\/\/golangbyexamples.com\/?p=73"},"modified":"2020-03-09T23:43:34","modified_gmt":"2020-03-09T23:43:34","slug":"interface-to-struct","status":"publish","type":"post","link":"https:\/\/golangbyexamples.com\/interface-to-struct\/","title":{"rendered":"Interface to struct in Go (Golang)"},"content":{"rendered":"\n<p class=\"has-medium-font-size\">We come around a situation sometimes in programming where an empty interface might a struct internally and we have to get the concrete struct out of it. Whoever is not aware of what an empty interface is should read this excellent article: https:\/\/research.swtch.com\/interfaces. <\/p>\n\n\n\n<p class=\"has-medium-font-size\">For conversion of interface{} to a struct, we will use the library &#8211; <a href=\"https:\/\/github.com\/mitchellh\/mapstructure\">https:\/\/github.com\/mitchellh\/mapstructure<\/a> .  Let&#8217;s understand how to convert the interface to a struct by an example:<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">package main\n\nimport (\n\t\"fmt\"\n\n\t\"github.com\/mitchellh\/mapstructure\"\n)\n\ntype NewCustomerEvent struct {\n\tName  string\n\tPhone string\n\tEmail string\n}\n\nfunc main() {\n\tnewCustomer := NewCustomerEvent{Name: \"x\", Phone: \"082213909101\", Email: \"xyz@gmail.com\"}\n\tconvert(newCustomer)\n}\n\nfunc convert(event interface{}) {\n\tc := NewCustomerEvent{}\n\tmapstructure.Decode(event, &c)\n\tfmt.Printf(\"Event is: %v\", c)\n}<\/code><\/pre>\n\n\n\n<p class=\"has-medium-font-size\"><strong>Output: <\/strong><\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-go\">Event is: {x 082213909101 xyz@gmail.com}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>We come around a situation sometimes in programming where an empty interface might a struct internally and we have to get the concrete struct out of it. Whoever is not aware of&#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":[210,3,11,10],"class_list":["post-73","post","type-post","status-publish","format-standard","hentry","category-tech","tag-convert","tag-go","tag-interface","tag-struct"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Interface to struct in Go (Golang) - Welcome To Golang By Example<\/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:\/\/golangbyexamples.com\/interface-to-struct\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Interface to struct in Go (Golang) - Welcome To Golang By Example\" \/>\n<meta property=\"og:description\" content=\"We come around a situation sometimes in programming where an empty interface might a struct internally and we have to get the concrete struct out of it. 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