How to Remove Items from Set based on a Condition in Dart - Step by Step Examples

How to Remove Items from Set based on a Condition in Dart ?

Answer

To remove items from a set based on a condition in Dart, you can use the removeWhere method with a predicate function that defines the condition.

✐ Examples

1 Removing Even Numbers from Integer Set

In this example,

We create a Set named numberSet containing integer values 1, 2, 3, 4, and 5.
We use the removeWhere method with a predicate function that checks for even numbers to remove them from the set.
Finally, we print the modified set numberSet to see the removed items.

Dart Program

void main() {
  Set<int> numberSet = {1, 2, 3, 4, 5};
  numberSet.removeWhere((num) => num % 2 == 0);
  print(numberSet);
}

Output

{1, 3, 5}

2 Removing Short Strings from String Set

In this example,

We create a Set named stringSet containing string values 'apple', 'banana', 'cherry', 'date', and 'grape'.
We use the removeWhere method with a predicate function that checks for string length less than 6 characters to remove them from the set.
Finally, we print the modified set stringSet to see the removed items.

Dart Program

void main() {
  Set<String> stringSet = {'apple', 'banana', 'cherry', 'date', 'grape'};
  stringSet.removeWhere((str) => str.length < 6);
  print(stringSet);
}

Output

{'banana', 'cherry'}

Summary

In this tutorial, we learned How to Remove Items from Set based on a Condition in Dart language with well detailed examples.

◀ Previous Next ▶

Dart Tutorials

Dart How-Tos

How to Remove Items from Set based on a Condition in Dart - Step by Step Examples

How to Remove Items from Set based on a Condition in Dart ?

Answer

✐ Examples

1 Removing Even Numbers from Integer Set

Dart Program

Output

2 Removing Short Strings from String Set

Dart Program

Output

Summary

More Dart Sets Tutorials