{"id":84,"date":"2022-12-08T05:25:54","date_gmt":"2022-12-08T05:25:54","guid":{"rendered":"https:\/\/www.devopsconsulting.in\/blog\/?p=84"},"modified":"2022-12-08T05:25:55","modified_gmt":"2022-12-08T05:25:55","slug":"what-is-the-list-firstwhere-method-in-dart","status":"publish","type":"post","link":"https:\/\/www.devopsconsulting.in\/blog\/what-is-the-list-firstwhere-method-in-dart\/","title":{"rendered":"What is the List firstWhere() method in Dart?"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>void main(){\r\n  \/\/ Creating list languages\r\n  List languages = new List();\r\n  \/\/ Adding items to the list\r\n  languages.add('Dart');\r\n  languages.add('Python');\r\n  languages.add('Java');\r\n  languages.add('C#');\r\n  languages.add('C++');\r\n  \/\/ Print result\r\n  print(languages);   \r\n \/\/ iterate through the list\r\n \/\/ Returns the first item whose length is greater than 3\r\n  var val = languages.firstWhere((item) => item.length > 3, orElse: () => null);\r\n  \/\/ if val is null, then the if statement is executed\r\n  if ( null == val ) {\r\n    print('Language not found.');\r\n  }\r\n  \/\/ Display result\r\n  print(val);  \r\n\r\n  \/\/ Creating another list\r\n  List&lt;String> fruits = &#91;'Apple', 'Lemon', 'Avocado', 'Orange'];\r\n  \/\/ iterate through the list\r\n \/\/ Returns the first item that contains PineApple\r\n \/\/ the orElse() is invoke if not found\r\n  var fav = fruits.firstWhere((item) => item.contains('PineApple'), \r\n      orElse: () => 'Fruit not available');\r\n  print(fav);\r\n }<\/code><\/pre>\n\n\n\n<p><strong>Output<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code> &#91;Dart, Python, Java, C#, C++]\r\n Dart\r\n Fruit not available<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Output<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-84","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is the List firstWhere() method in Dart? 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