WebJul 11, 2024 · You can use the keyword is or switch over runtimeType : dynamic foo = 42; if (foo is int) { print ("Hello"); } switch (foo.runtimeType) { case int: { print ("World"); } } Consider using is instead of directly using runtimeType. As is works with subclasses. While using runtimeType is a strict comparison. Share Improve this answer Follow WebOften Dart’s control flow analysis can detect when a non-nullable variable is set to a non-null value before it’s used, but sometimes analysis fails. Two common cases are top-level variables and instance variables: Dart often can’t determine whether they’re set, so it …
Get the name of a Dart class as a Type or String
WebNov 1, 2024 · The Dart programming language is considered type safe, meaning it ensures that the variable’s value always matches the variable’s static type through a combination of static type checking and runtime checking. It is also known as Sound Typing. It comes in handy while debugging the code at compile time. WebThe Dart language is type safe: it uses a combination of static type checking and runtime checks to ensure that a variable’s value always matches the variable’s static type, sometimes referred to as sound typing. Although types are mandatory, type annotations are optional because of type inference. dave grohl and his mom show
Dart Flutter: How to check the variable type is a String or not ...
WebApr 24, 2024 · Is there a way to get the class name of a dart class as a String or a Type object..? class MyClass { } var myClass = MyClass (); I know the property, runtimeType which return the type of the object as a Type object. But is there a similar function for classes? print (myClass.runtimeType.toString ()); WebJan 11, 2024 · This is how Flutter/Dart typing works. You can not explicitly check two types with generics (example on List): comparing of List and List will always return false. If you really need to compare two generic types then you can unpack them using generic helper to Type and try to compare them e.g. via string representations. Helper: WebDart also provides one way to check the type during run-time. is and is! operators are used to check the type of a variable in dart. For example : main(List args) { var value = 2; print(value is int); print(value is! … black and grey backgrounds