【入门夯实】命名参数：用表实现的关键字传参

local function createItem(actor, name, count, bind, from, expire)
    giveitem(actor, name, count, bind, from)
end
createItem(actor, "祝福油", 1, 7200, "礼包", 0)

local function createItem(actor, opt)
    local o = opt or {}
    local count = o.count or 1
    local bind = o.bind or 0
    giveitem(actor, o.name, count, bind, o.from or "系统发放")
end
createItem(actor, { name = "祝福油", count = 2, from = "礼包" })

local defaults = { count = 1, bind = 0, from = "系统" }
local function createItem(actor, opt)
    setmetatable(opt or {}, { __index = defaults })
    giveitem(actor, opt.name, opt.count, opt.bind, opt.from)
end
createItem(actor, { name = "祝福油" })