27 - Null Safety In Dart شرح || ( ?? - ! ) скачать в хорошем качестве

27 - Null Safety In Dart شرح || ( ?? - ! )

Null safety : is a feature in the Dart programming language that helps developers to avoid null errors. This feature is called Sound Null Safety in dart. This allows developers to catch null errors at edit time. -- Advantage Of Null Safety • Write safe code. • Reduce the chances of application crashes. • Easy to find and fix bugs in code. -- You can use nullable variables in many way • You can use if statement to check whether the variable is null or not. • You can use ! operator, which returns null if the variable is null. • You can use ?? operator to assign a default value if the variable is null. ---------------------------------------------------------- #nullsafety in dart #ahmedelsapagh #dart #flutterdeveloper #flutter #dart-null-safety #nullsafety #NullSafety ​‪@ahmed_elsapagh‬ ---------------------------------------------------------- Preparation, Presentation and Editing By : Ahmed Elsapagh .. Portfolio : https://ahmedelsapagh101.web.app/#/ facebook group :   / programmmingforall   linkedIn :   / ahmed-elsapagh-aa8010220   GitHub : https://github.com/Ahmedelsapagh10 جروب تليجرام(flutter and dart) : https://t.me/flutter_community_egy جروب تليجرام (Problem solving) : https://t.me/learn_programming_for_ev... youtube : https://www.youtube.com/@ahmed_elsapa... .. Tools : Adobe Premiere for Video editiong Adobe photoshop for editing photo Adobe After effect for motion graphic Camtasia studio for screen record microphone : Boya - By M1