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Youtube: Learn Flutter Life Cycle In 10 Minutes youtu.be/CjloInz3-I0 InitState First Lyfecycle method that is called. Called when this object is inserted into the tree. The framework will call this method exactly once for each State object it creates. DidChangeDependencies Second Lifecycle method that is called. Called every time a dependency change. Called when a dependency of this element chan..

Dart Class Dart language tour class ClassName { } var myClass = ClassName(); Class members ., ?. var p = Point(2, 2); p.y = 3; assert(p.y == 3); num distance = p.distanceTo(Point(4, 4)); // If p is non-null, set its y value to 4. p?.y = 4; Constructor constructor 를 선언하지 않으면 기본적으로 Default constructor 가 생긴다. Default constructor 는 클래스 이름과 동일한 이름을 가지고 argument 가 없다. constructor는 상속되지 않는다. var p1 = P..