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Hi guys, it is not clear for me which channel should I share that thing but, I really love the Bool.toggle() in Swift , it was easy to create a similar one :grin:

that function already exists, it's called `not()`

Yes, but I really don't like that name of that method, dunno why :/

toggle implies a stateful action though. which what you have written is not

toggle in Swift is a `mutating func`. afaik this is not achievable in kotlin

In Kotlin, you can't directly change the state of a `Boolean` within an extension function because it's a value type and is passed by value, not by reference.

However, you can achieve a similar effect by using a wrapper class that holds the Boolean value. Here's how you can do it:

```class MutableBoolean(var value: Boolean)

fun MutableBoolean.toggle(): Boolean {
    this.value = !this.value
    return this.value
}```
You can use this `toggle` function like this:
```val myBool = MutableBoolean(true)
println(myBool.toggle()) // prints: false
println(myBool.toggle()) // prints: true```
