How to Convert a Set of Strings to a Set of Integers in Swift - Step by Step Examples

How to Convert a Set of Strings to a Set of Integers in Swift ?

In Swift, you can convert a set of strings to a set of integers using the `map` function along with the `Int` initializer.

In this example,

We start by having a set of strings, let's call it `stringSet`.
We use the `map` function on `stringSet` to apply a transformation to each element of the set.
Inside the `map` function, we convert each string element to an integer using the `Int` initializer.
This results in a set of integers, which is what we desired.

let stringSet: Set<String> = ["1", "2", "3", "4", "5"]
let intSet = Set(stringSet.map { Int($0) ?? 0 })
print(intSet)

[5, 2, 3, 4, 1]

In this example,

If there are non-numeric strings in the set, we use the nil-coalescing operator (`??`) to handle the conversion failures.
In case a string cannot be converted to an integer, we substitute it with a default value, like `0` in this example.
This ensures that even if some strings cannot be converted, the conversion process does not fail.

let stringSet: Set<String> = ["1", "2", "3", "four", "5"]
let intSet = Set(stringSet.map { Int($0) ?? 0 })
print(intSet)

[5, 2, 3, 0, 1]

In this tutorial, we learned How to Convert a Set of Strings to a Set of Integers in Swift language with well detailed examples.