【入门夯实】Lua数组去重：红名白名单的重复项清理

local function dedup(list)
    local out = {}
    for i = 1, #list do
        local dup = false
        for j = 1, #out do           -- 双重循环 n²，2000项跑爆
            if out[j] == list[i] then dup = true break end
        end
        if not dup then out[#out + 1] = list[i] end
    end
    return out
end

local function dedup(list)
    local seen, out = {}, {}
    for i = 1, #list do
        local v = list[i]
        if not seen[v] then
            seen[v] = true
            out[#out + 1] = v        -- 首次出现才收，序保持
        end
    end
    return out
end
sendmsg(actor, 1, "红名白名单 " .. #dedup(WLIST) .. " 项")