keyword is used in the argument to make it optional for the constructor . All the optional arguments of a constructor should be placed after all the mandatory arguments only in a constructor.
Read moreCan you have a constructor with no parameters?
A constructor that takes no parameters is called a parameterless constructor . Parameterless constructors are invoked whenever an object is instantiated by using the new operator and no arguments are provided to new .
Read moreCan you have a constructor with no parameters?
A constructor that takes no parameters is called a parameterless constructor . Parameterless constructors are invoked whenever an object is instantiated by using the new operator and no arguments are provided to new .
Read moreHow do you pass a parameter to a route?
Passing parameters to routes
Read moreHow do you pass arguments with pushNamed Flutter?
To use push with a named route, use RouteSettings argument with the route name . Directly inside Page1 pass the User object ( loggedInUser ) to Page2 within a Navigator. push call and use a RouteSettings arg with your route name ( /page2 ). Navigator.
Read moreWHAT IS NULL check operator in flutter?
Null-aware operators in dart allow you to make computations based on whether or not a value is null . It’s shorthand for longer expressions. A null-aware operator is a nice tool for making nullable types usable in Dart instead of throwing an error.
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