(Swift) give inventory (give anyone in proximity)

string script; // script name to skip it while giving
string hover_text = "test";  // hover text
vector hover_color = <1.0,1.0,1.0>;
string folder;

float range = 5; // detection range, m
float rate =  5; // seconds between scans , do nt d too often.

list listav = [];
integer max_avatars = 50;
integer no_to_forget = 10;

// Init procedure on state entry.
init()
{
    llSensorRepeat("", NULL_KEY, AGENT, range, PI, rate);
    llSetText(hover_text, hover_color, 1);
    script = llGetScriptName();
    folder = llGetObjectName();
}

give(key avatar)
{
     list to_give;
        integer c=0;
        integer max=llGetInventoryNumber(INVENTORY_ALL);
        string this;
        for(c=0;c<max;c++)
        {
            this = llGetInventoryName(INVENTORY_ALL, c);
            if(this!=script)
            {
                to_give+=[this];
            }
        }

        llGiveInventoryList(avatar,folder,to_give);
}

default
{
    state_entry()
    {
        init();
    }

    // resetting state on rez, just in case
    on_rez(integer start_param)
    {
        llResetScript();
    }

    // for every toucher in queue, give them content
    sensor(integer n)
    {
        integer count;
        integer i;
        for( i = 0; i < n; i++)
        {
            key avatar = llDetectedKey(i);
            count = llListFindList(listav,[avatar]);
            if (count == -1)
            {
                listav += avatar;
                give(llList2String(listav, i));
            }
            if(llGetListLength(listav) > max_avatars )
                listav = llDeleteSubList( listav, 0, no_to_forget );
        }
    }
}