Lua表格转CSV：含逗号字段的转义拼接

local function escField(v)
    v = tostring(v)
    if v:find('[,"]') then
        v = '"' .. v:gsub('"', '""') .. '"'
    end
    return v
end

local function toCSV(rows)
    local out = {}
    for _, row in ipairs(rows) do
        local cells = {}
        for _, cell in ipairs(row) do
            cells[#cells + 1] = escField(cell)
        end
        out[#out + 1] = table.concat(cells, ",")
    end
    return table.concat(out, "\n")
end
local p = getplayerbyname("csv01")
sendmsg(p, 1, toCSV({
    {"name", "note"},
    {"tom", "hi,all"},
}))