How to check if a Set is Empty in Dart - Step by Step Examples

How to check if a Set is Empty in Dart ?

Answer

To check if a Set is empty in Dart, you can use the isEmpty property or the length property.


✐ Examples

1 Check if Set is Empty Using isEmpty Property

In this example,

  1. We define a set named `mySet` containing elements of a specific type.
  2. We check if the set is empty using the `isEmpty` property.
  3. If the `isEmpty` property returns `true`, then the set is empty; otherwise, it contains elements.

Dart Program

// Define set
Set<String> mySet = {};

// Check if set is empty using isEmpty property
if (mySet.isEmpty) {
  print('Set is empty');
} else {
  print('Set is not empty');
}

Output

Set is empty

2 Check if Set is Empty Using length Property

In this example,

  1. We define a set named `mySet` containing elements of a specific type.
  2. We check if the length of elements in the set is equal to zero using the `length` property.
  3. If the length is zero, then the set is empty; otherwise, it contains elements.

Dart Program

// Define set
Set<String> mySet = {};

// Check if set is empty using length property
if (mySet.length == 0) {
  print('Set is empty');
} else {
  print('Set is not empty');
}

Output

Set is empty

3 Check if Set is Empty Using isEmpty Property

In this example,

  1. We define a non-empty set named `mySet` containing elements of a specific type.
  2. We check if the set is empty using the `isEmpty` property.
  3. If the `isEmpty` property returns `true`, then the set is empty; otherwise, it contains elements.

Dart Program

// Define non-empty set
Set<String> mySet = {'apple', 'banana', 'orange'};

// Check if set is empty using isEmpty property
if (mySet.isEmpty) {
  print('Set is empty');
} else {
  print('Set is not empty');
}

Output

Set is not empty

4 Check if Set is Empty Using length Property

In this example,

  1. We define a non-empty set named `mySet` containing elements of a specific type.
  2. We check if the length of elements in the set is equal to zero using the `length` property.
  3. If the length is zero, then the set is empty; otherwise, it contains elements.

Dart Program

// Define non-empty set
Set<String> mySet = {'apple', 'banana', 'orange'};

// Check if set is empty using length property
if (mySet.length == 0) {
  print('Set is empty');
} else {
  print('Set is not empty');
}

Output

Set is not empty

Summary

In this tutorial, we learned How to check if a Set is Empty 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 ?