class in dart
class class_name {
//rest of the code here:
}dart this constructor
class MyClass {
int param1;
MyClass(this.param1);
}
final obj = MyClass(100);
class MyClassNamed { // with named parameters
int param1;
MyClassNamed({required this.param1});
}
final objNamedParam = MyClassNamed(param1: 100);fluter class constructor
class Customer {
String name;
int age;
String location;
// constructor
Customer(String name, int age, String location) {
this.name = name;
this.age = age;
this.location = location;
}
}dart call constructor in constructor
class Chipmunk {
String name;
int fame;
Chipmunk.named(this.name, [this.fame]);
Chipmunk.famous1() : this.named('Chip', 1000);
factory Chipmunk.famous2() {
var result = new Chipmunk.named('Chip');
result.fame = 1000;
return result;
}
}dart spread
arr1 = [1, 2, 3];
arr2 = [...arr1, 4, 5, 6]
// arr -> [1, 2, 3, 4, 5, 6]dart constructor
void main() {
Human jenny = Human(height1 :15);
print(jenny.height);
Human jerry = Human(height1: 20);
print(jerry.height);
}
class Human {
double height = 0;
Human({height1 = 0}) { // constructor = initializes values of properties in the class.
this.height = height1;
}
}Copyright © 2021 Codeinu
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