【入门夯实】Lua命名参数：裁决之杖购买接口的options表

local function charge(actor, id, num, bind)
    takeitem(actor, id, num)
    setplayvar(actor, "BIND_FLAG", bind)
end
charge(actor, "裁决之杖", 0, 3)   -- 3、4位写反：数量0绑定3

local function charge(actor, opts)
    local num = opts.num or 1        -- 命名参数，顺序无关
    local bind = opts.bind or 0
    takeitem(actor, opts.id, num)
    setplayvar(actor, "BIND_FLAG", bind)
    sendmsg(actor, 1, "购入裁决之杖 " .. num .. " 件")
end
charge(actor, {id = "裁决之杖", num = 3, bind = 0})