{"id":3634,"date":"2023-03-19T16:15:00","date_gmt":"2023-03-19T09:15:00","guid":{"rendered":"https:\/\/laoitdev.com\/?p=3634"},"modified":"2024-02-07T20:56:54","modified_gmt":"2024-02-07T13:56:54","slug":"simple-code-with-dart-extension-methods","status":"publish","type":"post","link":"https:\/\/laoitdev.com\/lao\/2023\/3634\/","title":{"rendered":"Simple code with dart extension methods"},"content":{"rendered":"<p>Extension methods \u0e97\u0eb5\u0ec8\u0ec0\u0e9b\u0eb5\u0e94\u0ec2\u0e95\u0ec3\u0e99 dart 2.7 \u0e84\u0eb7\u0edc\u0eb6\u0ec8\u0e87\u0ec3\u0e99 feature \u0e97\u0eb5\u0ec8\u0e94\u0eb5\u0e87\u0eb2\u0ea1\u0e82\u0ead\u0e87 dart programing \u0e97\u0eb5\u0ec8\u0ec0\u0eae\u0eb1\u0e94\u0ec3\u0eab\u0ec9\u0eaa\u0eb2\u0ea1\u0eb2\u0e94\u0ec0\u0e9e\u0eb5\u0ec8\u0ea1 function \u0ec0\u0e82\u0ebb\u0ec9\u0eb2\u0ec4\u0e9b\u0ec3\u0e99 library \u0e97\u0eb5\u0ec8\u0ea1\u0eb5\u0ea2\u0eb9\u0ec8\u0ec1\u0ea5\u0ec9\u0ea7\u0ec2\u0e94\u0e8d\u0e97\u0eb5\u0ec8\u0e9a\u0ecd\u0ec8\u0e95\u0ec9\u0ead\u0e87\u0eae\u0eb9\u0ec9\u0ea7\u0ec8\u0eb2 library \u0e99\u0eb1\u0ec9\u0e99\u0ec6\u0ea1\u0eb1\u0e99\u0ec0\u0eae\u0eb1\u0e94\u0ea7\u0ebd\u0e81\u0ec1\u0e99\u0ea7\u0ec3\u0e94. \u0e95\u0ebb\u0ea7\u0ea2\u0ec8\u0eb2\u0e87\u0ec0\u0e8a\u0eb1\u0ec8\u0e99\u0e96\u0ec9\u0eb2\u0ec0\u0ead\u0ebb\u0eb2 library \u0e84\u0ebb\u0e99\u0ead\u0eb7\u0ec8\u0e99\u0ea1\u0eb2\u0ec3\u0e8a\u0ec9\u0ec1\u0ea5\u0ec9\u0ea7\u0ea2\u0eb2\u0e81\u0ec0\u0e9e\u0eb5\u0ec8\u0ea1 function \u0ec3\u0e94\u0edc\u0eb6\u0ec8\u0e87\u0ec0\u0e82\u0ebb\u0ec9\u0eb2\u0ec4\u0e9b\u0ec0\u0e9e\u0eb5\u0ec8\u0ea1\u0ec0\u0e9e\u0eb7\u0ec8\u0ead\u0e84\u0ea7\u0eb2\u0ea1\u0eaa\u0eb0\u0e94\u0ea7\u0e81\u0e82\u0ead\u0e87\u0ec0\u0eae\u0ebb\u0eb2\u0ec0\u0e8a\u0eb4\u0ec8\u0e87\u0ea1\u0eb1\u0e99\u0ec0\u0e9b\u0eb1\u0e99\u0ec4\u0e9b\u0e9a\u0ecd\u0ec8\u0ec4\u0e94\u0ec9\u0e97\u0eb5\u0ec8\u0e88\u0eb0\u0ec0\u0eae\u0eb1\u0e94\u0ec1\u0e9a\u0e9a\u0e99\u0eb1\u0ec9\u0e99\u0e99\u0ead\u0e81\u0e88\u0eb2\u0e81\u0e88\u0eb0\u0ec4\u0e9b contribue library \u0e99\u0eb1\u0ec9\u0e99 \ud83d\ude05.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"2b95\">Extension methods \u0edc\u0ec9\u0eb2\u0e95\u0eb2\u0ec0\u0e9b\u0eb1\u0e99\u0ec1\u0e99\u0ea7\u0ec3\u0e94?<\/h3>\n\n\n\n<p id=\"a3bc\">\u0e95\u0ebb\u0ea7\u0ea2\u0ec8\u0eb2\u0e87\u0e81\u0eb2\u0e99\u0ec1\u0e9b\u0e87 <code>string<\/code> \u0ec0\u0e9b\u0eb1\u0e99 <code>double<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>double.parse(\"5.3\");<\/code><\/pre>\n\n\n\n<p>\u0ec1\u0ea5\u0ec9\u0ea7\u0e96\u0ec9\u0eb2\u0ec0\u0eae\u0ebb\u0eb2\u0ec1\u0e9b\u0e87\u0ea1\u0eb1\u0e99\u0ec4\u0e94\u0ec9\u0ea2\u0eb9\u0ec8\u0ec3\u0e99 <code>string<\/code> type \u0ec0\u0ea5\u0eb5\u0e8d\u0ea1\u0eb1\u0e99\u0e88\u0eb0\u0e9a\u0ecd\u0ec8\u0eaa\u0eb0\u0ead\u0eb2\u0e94\u0e87\u0eb2\u0ea1\u0e95\u0eb2\u0e94\u0eb5\u0e81\u0ec8\u0ead\u0e99\u0e9a\u0ecd\u0ec8?<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\"5.3\".toDouble();<\/code><\/pre>\n\n\n\n<p>\u0ec1\u0ea5\u0eb0\u0e99\u0eb5\u0ec9\u0e84\u0eb7 extension method \u0ec3\u0e99 dart \ud83d\ude09 \u0e81\u0eb2\u0e99\u0ec3\u0e8a\u0ec9\u0e87\u0eb2\u0e99\u0e87\u0ec8\u0eb2\u0e8d\u0ec6\u0ec1\u0e9a\u0e9a\u0e99\u0eb5\u0ec9\u0ec0\u0ea5\u0eb5\u0e8d. \u0e81\u0eb2\u0e99\u0eae\u0ec9\u0ead\u0e87\u0ec3\u0e8a\u0ec9 method \u0ec1\u0e9a\u0e9a\u0e99\u0eb5\u0ec9\u0ec0\u0eae\u0ebb\u0eb2\u0e84\u0eb8\u0ec9\u0e99\u0ec0\u0e84\u0eb5\u0e8d\u0e81\u0eb1\u0e99\u0e94\u0eb5\u0e81\u0eb1\u0e9a\u0e81\u0eb2\u0e99\u0ec1\u0e9b\u0e87 type \u0e95\u0ec8\u0eb2\u0e87\u0ec6\u0ec0\u0e9b\u0eb1\u0e99 <code>string<\/code> \u0ec0\u0e8a\u0eb1\u0ec8\u0e99\u0ea7\u0ec8\u0eb2: <code>12.toString()<\/code> , <code>DateTime.now.toString()<\/code> \u0ec0\u0ead\u0ebb\u0eb2\u0ec0\u0e9b\u0eb1\u0e99\u0ea7\u0ec8\u0eb2\u0e84\u0eb4\u0e94\u0eab\u0e8d\u0eb1\u0e87\u0e9a\u0ecd\u0ec8\u0ead\u0ead\u0e81\u0ea2\u0eb2\u0e81\u0ec1\u0e9b\u0e87\u0ec0\u0e9b\u0eb1\u0e99 <code>string<\/code> \u0e81\u0ecd\u0ec8\u0e9e\u0ebd\u0e87\u0ec1\u0e95\u0ec8\u0eae\u0ec9\u0ead\u0e87\u0ec3\u0e8a\u0ec9 <code>.toString()<\/code> \ud83d\ude03.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"d91b\">\u0e81\u0eb2\u0e99\u0eaa\u0ec9\u0eb2\u0e87 Extension methods<\/h3>\n\n\n\n<p id=\"fcc3\">\u0e81\u0eb2\u0e99\u0eaa\u0ec9\u0eb2\u0e87 extension method \u0e82\u0eb6\u0ec9\u0e99\u0ea1\u0eb2\u0ec3\u0e8a\u0ec9\u0e87\u0eb2\u0e99\u0e99\u0eb1\u0ec9\u0e99\u0e88\u0eb0\u0ea1\u0eb5 systax \u0ec1\u0e9a\u0e9a\u0e99\u0eb5\u0ec9:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>extension &lt;extension name> on &lt;type> {\n  .\n  .\n  .\n  (&lt;member definition>)*\n}<\/code><\/pre>\n\n\n\n<p id=\"f186\">\u0e95\u0ebb\u0ea7\u0ea2\u0ec8\u0eb2\u0e87<\/p>\n\n\n\n<p id=\"b50d\">extension format date time<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>extension DateTimeExtension on DateTime {\n  String format(&#91;String pattern = 'dd\/MM\/yyyy', String? locale]) {\n    DateTime.now.toString();\n    return DateFormat(pattern, locale).format(this);\n  }\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>DateTime.now().format(); \/\/ 19\/03\/2023<\/code><\/pre>\n\n\n\n<p>extension \u0ec1\u0e9b\u0e87 <code>string<\/code>\u0ec0\u0e9b\u0eb1\u0e99 <code>double<\/code><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>extension ConvertStringToDouble on String {\n  double toDouble() => double.tryParse(this) ?? 0.0;\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\"100.5\".toDouble(); \/\/ 100.5\n\"not number\".toDouble(); \/\/ 0<\/code><\/pre>\n\n\n\n<p>\u0eaa\u0eb1\u0e87\u0ec0\u0e81\u0e94\u0ec0\u0eab\u0eb1\u0e99\u0ea7\u0ec8\u0eb2\u0e81\u0eb2\u0e99\u0eaa\u0ec9\u0eb2\u0e87 method member \u0e82\u0ead\u0e87 extension \u0e9a\u0ecd\u0ec8\u0ec4\u0e94\u0ec9\u0ec1\u0e95\u0e81\u0e95\u0ec8\u0eb2\u0e87\u0eab\u0e8d\u0eb1\u0e87\u0eab\u0ebc\u0eb2\u0e8d\u0e81\u0eb1\u0e9a\u0e81\u0eb2\u0e99\u0eaa\u0ec9\u0eb2\u0e87 method \u0ec3\u0e99 class \u0e99\u0ead\u0e81\u0e99\u0eb1\u0ec9\u0e99\u0e8d\u0eb1\u0e87\u0eaa\u0eb2\u0ea1\u0eb2\u0e94 access public members \u0e95\u0ec8\u0eb2\u0e87\u0ec6\u0e82\u0ead\u0e87 class type \u0e97\u0eb5\u0ec8\u0ec0\u0eae\u0ebb\u0eb2\u0eaa\u0ec9\u0eb2\u0e87 extension \u0ec3\u0eab\u0ec9. \u0ec0\u0e9a\u0eb4\u0ec8\u0e87\u0ec1\u0ea5\u0ec9\u0ea7\u0e81\u0ecd\u0ec8\u0e84\u0eb7\u0e81\u0eb1\u0e9a\u0ea7\u0ec8\u0eb2\u0ec0\u0eae\u0ebb\u0eb2 <code>extends<\/code> class \u0e99\u0eb1\u0ec9\u0e99 \u0ec1\u0e95\u0ec8\u0e97\u0eb5\u0ec8\u0ec1\u0e95\u0e81\u0e95\u0ec8\u0eb2\u0e87\u0e88\u0eb2\u0e81\u0e81\u0eb2\u0e99 <code>extends<\/code> \u0e81\u0ecd\u0ec8\u0e84\u0eb7\u0ea1\u0eb1\u0e99\u0e9a\u0ecd\u0ec8\u0ec1\u0ea1\u0ec8\u0e99\u0e81\u0eb2\u0e99\u0eaa\u0ec9\u0eb2\u0e87 <code>class<\/code> \u0ec3\u0eab\u0ea1\u0ec8\u0e82\u0eb6\u0ec9\u0e99\u0ea1\u0eb2\u0e99\u0eb1\u0ec9\u0e99\u0ec0\u0ead\u0e87.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"f8d8\">Unnamed extensions<\/h3>\n\n\n\n<p id=\"6f27\">\u0e81\u0eb2\u0e99\u0eaa\u0ec9\u0eb2\u0e87 extension \u0e99\u0eb1\u0ec9\u0e99\u0eaa\u0eb2\u0ea1\u0eb2\u0e94\u0e9a\u0ecd\u0ec8\u0ec3\u0eaa\u0ec8\u0e8a\u0eb7\u0ec8\u0e81\u0ecd\u0ec8\u0ec4\u0e94\u0ec9. \u0ec1\u0e95\u0ec8\u0e9b\u0eb0\u0ec0\u0e9e\u0e94 extension \u0e99\u0eb5\u0ec9\u0eaa\u0eb2\u0ea1\u0eb2\u0e94\u0eae\u0ec9\u0ead\u0e87\u0ec3\u0e8a\u0ec9 static method \u0e82\u0ead\u0e87\u0ea1\u0eb1\u0e99\u0ec4\u0e94\u0ec9\u0e9e\u0eb2\u0e8d\u0ec3\u0e99 extension \u0e9a\u0ec8\u0ead\u0e99\u0e97\u0eb5\u0ec8\u0ec0\u0eae\u0ebb\u0eb2 define \u0ea1\u0eb1\u0e99\u0e82\u0eb6\u0ec9\u0e99\u0ea1\u0eb2\u0ec0\u0e97\u0ebb\u0ec8\u0eb2\u0e99\u0eb1\u0ec9\u0e99 \u0ec0\u0ea7\u0ebb\u0ec9\u0eb2\u0ec1\u0e9a\u0e9a\u0e87\u0ec8\u0eb2\u0e8d\u0ec6\u0ec1\u0ea1\u0ec8\u0e99\u0e88\u0eb0\u0eae\u0ec9\u0ead\u0e87\u0ec3\u0e8a\u0ec9\u0ea2\u0eb9\u0ec8 file \u0ead\u0eb7\u0ec8\u0e99\u0ec6\u0ec1\u0ea1\u0ec8\u0e99\u0e9a\u0ecd\u0ec8\u0ec4\u0e94\u0ec9.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ convert_string_to_number_extenstions.dart\n\nextension on String {\n  double toDouble() => double.tryParse(this) ?? 0.0;\n}\n\n\nextension ConvertStringToDouble on String {\n  double convertToDouble() => toDouble();\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"9268\">generic extensions<\/h3>\n\n\n\n<p id=\"e8a2\">\u0ec0\u0eae\u0ebb\u0eb2\u0eaa\u0eb2\u0ea1\u0eb2\u0e94\u0eaa\u0ec9\u0eb2\u0e87 extension \u0e97\u0eb5\u0ec8\u0ec0\u0e9b\u0eb1\u0e99 generic type \u0ec4\u0e94\u0ec9 \u0ec0\u0e8a\u0eb1\u0ec8\u0e99:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>extension GenericList&lt;T> on List&lt;T> {\n  bool get memberIsString => T is String;\n\n  List&lt;double> get toListNumber {\n    List&lt;double> numbers = &#91;];\n    forEach((val) {\n      numbers.add(double.tryParse(val as String) ?? 0.0);\n    });\n    return numbers;\n  }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c203\">\u0eaa\u0eb0\u0eab\u0ebc\u0eb8\u0e9a<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>helper function \u0ec1\u0e9b\u0e87\u0ea1\u0eb2\u0ec0\u0e9b\u0eb1\u0e99 extension \u0e81\u0eb1\u0e99\u0ec4\u0e94\u0ec9\u0ec1\u0ea5\u0ec9\u0ea7<\/li><li>extension \u0ea1\u0eb1\u0e99\u0eaa\u0eb2\u0ea1\u0eb2\u0e94 reuse \u0ec4\u0e94\u0ec9\u0ea2\u0eb9\u0ec8\u0ec3\u0e99 project \u0ead\u0eb7\u0ec8\u0e99\u0ec6<\/li><li>\u0eaa\u0ec9\u0eb2\u0e87\/\u0ec3\u0e8a\u0ec9\u0e87\u0eb2\u0e99\u0e87\u0ec8\u0eb2\u0e8d, code \u0eaa\u0eb0\u0ead\u0eb2\u0e94\u0e82\u0eb6\u0ec9\u0e99\u0ec3\u0e8a\u0ec9\u0ec0\u0ea5\u0eb5\u0e8d\u0ea2\u0ec8\u0eb2\u0e84\u0eb4\u0e94\u0eab\u0ebc\u0eb2\u0e8d!<\/li><\/ul>\n\n\n\n<p id=\"9df5\">\u0eaa\u0eb2\u0ea1\u0eb2\u0e94\u0ead\u0ec8\u0eb2\u0e99\u0ec0\u0e9e\u0eb5\u0ec8\u0ea1\u0e95\u0eb7\u0ec8\u0ea1\u0e81\u0eb1\u0e99\u0ec4\u0e94\u0ec9\u0e97\u0eb5\u0ec8:<br>https:\/\/dart.dev\/language\/extension-methods<\/p>\n\n\n\n<p>\u0e82\u0ead\u0e9a\u0ec3\u0e88\u0e97\u0eb5\u0ec8\u0ead\u0ec8\u0eb2\u0e99\u0e81\u0eb1\u0e99\u0eae\u0ead\u0e94\u0e88\u0eb8\u0e94\u0e99\u0eb5\u0ec9 \u0ec4\u0ea7\u0ec9\u0e9e\u0ebb\u0e9a\u0e81\u0eb1\u0e99\u0ec3\u0e99\u0e9a\u0ebb\u0e94\u0e84\u0ea7\u0eb2\u0ea1\u0e95\u0ecd\u0ec8\u0ec4\u0e9b<\/p>\n\n\n\n<p>\u0e82\u0ebd\u0e99\u0ec2\u0e94\u0e8d: <a href=\"https:\/\/medium.com\/@xangnam?source=post_page-----489f0fa7bad--------------------------------\">xangnam phiasakha<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Extension methods \u0e97\u0eb5\u0ec8\u0ec0\u0e9b\u0eb5\u0e94\u0ec2\u0e95\u0ec3\u0e99 dart 2.7 \u0e84\u0eb7\u0edc\u0eb6\u0ec8\u0e87\u0ec3\u0e99 feature \u0e97\u0eb5\u0ec8\u0e94\u0eb5\u0e87\u0eb2\u0ea1\u0e82\u0ead\u0e87 dart programing \u0e97\u0eb5\u0ec8\u0ec0\u0eae\u0eb1\u0e94\u0ec3\u0eab\u0ec9\u0eaa\u0eb2\u0ea1\u0eb2\u0e94\u0ec0\u0e9e\u0eb5\u0ec8\u0ea1 function \u0ec0\u0e82\u0ebb\u0ec9\u0eb2\u0ec4\u0e9b\u0ec3\u0e99 library \u0e97\u0eb5\u0ec8\u0ea1\u0eb5\u0ea2\u0eb9\u0ec8\u0ec1\u0ea5\u0ec9\u0ea7\u0ec2\u0e94\u0e8d\u0e97\u0eb5\u0ec8\u0e9a\u0ecd\u0ec8\u0e95\u0ec9\u0ead\u0e87\u0eae\u0eb9\u0ec9\u0ea7\u0ec8\u0eb2 library \u0e99\u0eb1\u0ec9\u0e99\u0ec6\u0ea1\u0eb1\u0e99\u0ec0\u0eae\u0eb1\u0e94\u0ea7\u0ebd\u0e81\u0ec1\u0e99\u0ea7\u0ec3\u0e94. \u0e95\u0ebb\u0ea7\u0ea2\u0ec8\u0eb2\u0e87\u0ec0\u0e8a\u0eb1\u0ec8\u0e99\u0e96\u0ec9\u0eb2\u0ec0\u0ead\u0ebb\u0eb2 library \u0e84\u0ebb\u0e99\u0ead\u0eb7\u0ec8\u0e99\u0ea1\u0eb2\u0ec3\u0e8a\u0ec9\u0ec1\u0ea5\u0ec9\u0ea7\u0ea2\u0eb2\u0e81\u0ec0\u0e9e\u0eb5\u0ec8\u0ea1 &#8230; <a class=\"cz_readmore\" href=\"https:\/\/laoitdev.com\/lao\/2023\/3634\/\"><i class=\"fa fa-angle-right\"><\/i><span>\u0ead\u0ec8\u0eb2\u0e99\u0ec0\u0e9e\u0eb5\u0ec8\u0ea1\u0ec0\u0e95\u0eb5\u0ea1<\/span><\/a><\/p>","protected":false},"author":2,"featured_media":3635,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-3634","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Simple code with dart extension methods 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