[lightspark]

Drycoded, haven't tested anything...

local IDs = {
    [233490] = true,
    [233496] = true,
    [233497] = true,
    [233498] = true,
    [233499] = true,
}
 
local UAs = {}
 
local function UpdateDebuff(self)
    self:ReleaseAll()
 
    for i = 1, 40 do
        local _, _, icon, count, _, duration, expires, _, _, _, spellID = UnitDebuff("target", i, "PLAYER")
 
        -- if there's no spellID it means there's less than 40 auras
        if not spellID then
            break
        end
 
        -- search for UAs
        if IDs[spellID] and duration and duration >= 0 then
            UAs[#UAs + 1] = {
                id = spellID,
                icon = icon,
                count = count or 1,
                start = expires - duration,
                duration = duration,
            }
        end
    end
 
    -- do something w/ present auras
    local prevButton
 
    for i = 1, #UAs do
        local info = UAs[i]
        local button = self:Acquire()
 
        button.spellID = info.id
        button.cd:SetCooldown(info.start, info.duration)
        button.icon:SetTexture(info.icon)
        button.count:SetText(info.count > 1 and info.count or "")
 
        if prevButton then
            button:SetPoint("LEFT", prevButton, "RIGHT", gap, 0)
        else
            button:SetPoint("LEFT")
        end
 
        button:Show()
 
        prevButton = button
 
        UAs[i] = nil
    end
 
    self:SetSize(self.numActiveObjects > 0 and ((size + gap) * self.numActiveObjects) - gap or 0, size)
end

Originally Posted by Layback_ (1) What if my spell doesn't get included within those 40 debuffs?

Highly unlikely O_o

Originally Posted by Layback_ (2) Would there be a variable that stores number of unit's (not only target's, but for others' as well) buff/debuff? I mean something like BUFF_ACTUAL_DISPLAY/DEBUFF_ACTUAL_DISPLAY for player.

IIRC, nope...