How to create a Set of Sets in Dart - Step by Step Examples

How to create a Set of Sets in Dart ?

Answer

To create a set of sets in Dart, you can use the Set class from the Dart collections library. Each inner set can also be a Set.


✐ Examples

1 Creating a Set of Sets with Integers

In this example,

  1. First, create a new instance of a Set named setOfSets, where each element is another Set. This is done by declaring Set> setOfSets = {}.
  2. Next, create a few inner sets. For example, Set set1 = {1, 2, 3} initializes a set containing the integers 1, 2, and 3.
  3. Similarly, create another set like Set set2 = {4, 5, 6}.
  4. Add these inner sets to the outer set using the add method: setOfSets.add(set1) and setOfSets.add(set2).
  5. To demonstrate the structure, iterate over the outer set and print each inner set's elements. Use a nested for loop for this: for (var innerSet in setOfSets) followed by for (var item in innerSet).
  6. Print each item within the inner loop to display the elements of each inner set.

Dart Program

void main() {
  // Step 1: Create the outer set of sets
  Set<Set<int>> setOfSets = {};

  // Step 2: Create inner sets
  Set<int> set1 = {1, 2, 3};
  Set<int> set2 = {4, 5, 6};

  // Step 3: Add inner sets to the outer set
  setOfSets.add(set1);
  setOfSets.add(set2);

  // Step 4: Iterate and print the elements of each inner set
  for (var innerSet in setOfSets) {
    print('Inner set:');
    for (var item in innerSet) {
      print(item);
    }
  }
}

Output

Inner set:
1
2
3
Inner set:
4
5
6

2 Creating a Set of Sets with Strings

In this example,

  1. First, create a new instance of a Set named setOfSets, where each element is another Set. This is done by declaring Set> setOfSets = {}.
  2. Create a few inner sets. For example, Set set1 = {'apple', 'banana'} initializes a set containing the strings 'apple' and 'banana'.
  3. Create another set like Set set2 = {'cherry', 'date'}.
  4. Add these inner sets to the outer set using the add method: setOfSets.add(set1) and setOfSets.add(set2).
  5. To demonstrate the structure, iterate over the outer set and print each inner set's elements. Use a nested for loop for this: for (var innerSet in setOfSets) followed by for (var item in innerSet).
  6. Print each item within the inner loop to display the elements of each inner set.

Dart Program

void main() {
  // Step 1: Create the outer set of sets
  Set<Set<String>> setOfSets = {};

  // Step 2: Create inner sets
  Set<String> set1 = {'apple', 'banana'};
  Set<String> set2 = {'cherry', 'date'};

  // Step 3: Add inner sets to the outer set
  setOfSets.add(set1);
  setOfSets.add(set2);

  // Step 4: Iterate and print the elements of each inner set
  for (var innerSet in setOfSets) {
    print('Inner set:');
    for (var item in innerSet) {
      print(item);
    }
  }
}

Output

Inner set:
apple
banana
Inner set:
cherry
date

Summary

In this tutorial, we learned How to create a Set of Sets in Dart language with well detailed examples.


More Dart Sets Tutorials

  1. How to create an Empty Set in Dart ?
  2. How to Initialize a Set in Dart ?
  3. How to Get Length of a Set in Dart ?
  4. How to create a Set of size N in Dart ?
  5. How to create a Set of Numbers from 1 to N in Dart ?
  6. How to create a Set of integers in Dart ?
  7. How to create a Set of Strings in Dart ?
  8. How to Access Items in a Set in Dart ?
  9. How to get a Random Item in a Set in Dart ?
  10. How to Iterate Over a Set in Dart ?
  11. How to check if a Set is Empty in Dart ?
  12. How to check if a Set is Not Empty in Dart ?
  13. How to get Subset from a Set in Dart ?
  14. How to check if a Specific Item is present in the Set in Dart ?
  15. How to check if a Set contains all the items of Another Set in Dart ?
  16. How to Sort Items of a Set in Dart ?
  17. How to Copy a Set in Dart ?
  18. How to add an Item to a Set in Dart ?
  19. How to find Union of Two Sets in Dart ?
  20. How to find Intersection of Two Sets in Dart ?
  21. How to check if Two Sets are Equal in Dart ?
  22. How to Convert a Set of Integers to a Set of Strings in Dart ?
  23. How to Convert a Set of Strings to a Set of Integers in Dart ?
  24. How to Convert a Set of Floats to a Set of Strings in Dart ?
  25. How to Convert a Set of Strings to a Set of Floats in Dart ?
  26. How to Filter Items of a Set based on a Condition in Dart ?
  27. How to Remove Specific Item from a Set in Dart ?
  28. How to Remove Items from Set based on a Condition in Dart ?
  29. How to create a Set of Sets in Dart ?