What is the dart equivalent to Swift “extensions”?
1,278
Solution 1
They are finally here 🥳
From dart version 2.6 (not 100% sure).
class Foo {
printFoo() {
print("Foo");
}
}
extension Bar on Foo {
printBar() {
print("Bar");
}
}
void main() {
final foo = Foo();
foo.printFoo();
foo.printBar();
}
prints:
Foo
Bar
You can give it a try in dart pad.
Solution 2
Extension methods are currently being implemented into the language.
https://github.com/dart-lang/language/projects/1#card-18758939
Specifications document
Author by
Marco Leong
Updated on December 09, 2022Comments
-
Marco Leong over 1 year
Keyword/reserved word
extension
allow code to be much cleaner by using an existing class in the standard frameworks without subclassing them. Is there a keyword in Dart that allows the same behavior?extension Double { var mm: Double { return self / 1_000.0 } } let oneInch = 25.4.mm print("One inch is \(oneInch) meters")