【入门夯实】改名无效：字符串不可变的传参真相

local function stripMark(mark)
    mark = string.gsub(mark, "红名", "")
end
local tag = "红名标记"
stripMark(tag)
sendmsg(nil, 1, tag)

local function stripMark(mark)
    local clean, n = string.gsub(mark, "红名", "")
    return clean, n
end
local function showTag(actor)
    actor = getplayerbyname(actor)
    local tag = "红名标记"
    local clean, n = stripMark(tag)
    sendmsg(actor, 1, "原串[" .. tag .. "] => 清洗[" .. clean .. "]，替换 " .. n .. " 处")
end

local roster = { { name = "红名张三" }, { name = "李四" } }
local function cleanRoster(list)
    for _, row in ipairs(list) do
        row.name = string.gsub(row.name, "红名", "")
    end
end