using { /Fortnite.com/Devices }
using { /Verse.org/Simulation }

# This is our device. It is like a box for our code.
GemCounterDevice := class(creative_device):

    # This is our array. It holds gem names.
    # We start with an empty list.
    # Note: class fields in Verse are immutable by default;
    # we use 'var' so we can reassign the array when appending.
    var Gems : []string = array{}

    # This runs when the game starts.
    OnBegin<override>()<suspends>: void =
        # Let's add some gems to the list!
        # In Verse, arrays are value types. To "append" we
        # concatenate a new single-element array and store
        # the result back into our var field.
        set Gems = Gems + array{"Ruby"}
        set Gems = Gems + array{"Emerald"}
        set Gems = Gems + array{"Sapphire"}

        # Now let's look at all the gems.
        # We use a 'for' loop to visit each one.
        for (Gem : Gems):
            # This prints the gem name to the debug log.
            # You can see this in the output window.
            Print("Found a gem: {Gem}")

    # This function shows how to get a specific gem.
    GetFirstGem(): string =
        # We get the gem at index 0.
        # This is the first item in the list.
        # Note: indexing a Verse array is a failable expression,
        # so we use 'if' to safely unwrap it.
        if (FirstGem := Gems[0]):
            return FirstGem
        return ""