function __TS__ArrayIndexOf(arr, searchElement, fromIndex)
    local len = #arr
    if len == 0 then
        return -1
    end
    local n = 0
    if fromIndex then
        n = fromIndex
    end
    if n >= len then
        return -1
    end
    local k
    if n >= 0 then
        k = n
    else
        k = len + n
        if k < 0 then
            k = 0
        end
    end
    do
        local i = k
        while i < len do
            if arr[i + 1] == searchElement then
                return i
            end
            i = i + 1
        end
    end
    return -1
end