How to Filter Items of a Set based on a Condition in Swift - Step by Step Examples

How to Filter Items of a Set based on a Condition in Swift ?

Answer

To filter items of a set based on a condition in Swift, you can use the filter method to apply a filtering predicate and create a new set from the filtered items.

✐ Examples

1 Filtering Numbers Greater Than 5

In this example,

We create a set named numberSet using the Set type, which contains integer values 1, 5, 10, 15, and 20.
We use the filter method on numberSet to filter the numbers greater than 5 using a closure as the filtering condition.
We create a new set named filteredSet using the Set initializer with the filtered items from the filter method.
Finally, we iterate through filteredSet and print each filtered item to the console.

Swift Program

var numberSet: Set<Int> = [1, 5, 10, 15, 20]

let filteredSet = numberSet.filter { $0 > 5 }

for num in filteredSet {
    print(num)
}

Output

10
15
20

2 Filtering Strings Containing 'a'

In this example,

We create a set named stringSet using the Set type, which contains string values "apple", "banana", "cherry", "date", and "grape".
We use the filter method on stringSet to filter the strings containing the letter 'a' using a closure as the filtering condition.
We create a new set named filteredStringSet using the Set initializer with the filtered items from the filter method.
Finally, we iterate through filteredStringSet and print each filtered string to the console.

Swift Program

var stringSet: Set<String> = ["apple", "banana", "cherry", "date", "grape"]

let filteredStringSet = stringSet.filter { $0.contains("a") }

for str in filteredStringSet {
    print(str)
}

Output

apple
banana
grape

Summary

In this tutorial, we learned How to Filter Items of a Set based on a Condition in Swift language with well detailed examples.

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