Kotlin-forEachBreakable

Extension function for Iterable that makes it possible to use Break and Continue keywords inside forEach action

Problem

Consider this for loop:

val list = listOf(1, 2, 3, 4, 5)

for(x in list) {
    if(x % 2 == 0)
        continue

    print(x)
}

Output: 135

Pretty straightforward. But what if we want to use list.forEach() instead?

list.forEach {x ->
    if (x % 2 == 0)
        return@forEach

    print(x)
}

It does the same, but it's a bit harder to read, because we are all so familiar with "continue" keyword. Same for "break".

So, can we make it possible to use those keywords in forEach? The answer is No, no way. Please don't do it Yes!

Meet forEachBreakable! You can use it like this:

list.forEachBreakable { x ->
    if (x % 2 == 0)
        Continue

    print(x)
}

Output: 135

Amazing, huh? Break is also available:

list.forEachBreakable { x ->
    if (x % 2 == 0)
        Break

    print(x)
}

Output: 1

If you want to use it, just copy the ForEachBreakable.kt to your project and you are ready to go!

P.S. Consider reading what it does before using it, you might not like it.

P.P.S. I know this is stupid af, it was fun to implement though