Generators

Prerequisite: Iteration, Iterator , Iterable

First Tab

void main(){
  
  
  List<int> myList = [1,2,4,5,7];
  
  
  for(int i in myList){
    
    print(i);
    
    
  }
  
}

Second Tab

Third Tab

In simple words , iterable is something you can loop over or a collection of values that can be accessed sequentially

Iterator is something that remember can "where it is " i.e. current position during iteration

Documentation

Iterables

Iterable collectionsdart_lang

Iterators

Sync Generators

There are two types of Generators in Dart

• Synchronous Generator Returns an iterable

• Asynchronous Generator Returns a stream

First Tab

In a normal function you would expect the function body to execute when you call the function , but in case of generator it doesn't execute

void main() {
  print("Start of main");

  Iterable<int> numbers = getNumbers(6);

  print("End of main ");
}

Iterable<int> getNumbers(int number) sync* {
  print("Number Generation Started");

  for (int i = 0; i < 0; i++) {
    yield i;
  }

  print("Number Generation ended");
}

Second Tab

Async Generators