dart factory constructor code example
Example 1: Flutter Constructor
Customer(String name, int age, String location) {
this.name = name;
this.age = age;
this.location = location;
}
Customer(this.name, this.age) {
this.name = name;
this.age = age;
}
Example 2: dart ?? operator
int val1;
final int val2 = 20;
console.log(val1 ?? val2); //result => 20 because val1 is null
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final int val1 = 30;
final int val2 = 20;
console.log(val1 ?? val2); //result => 30 because val1 is not null